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Issues with ActivityMainBindingImpl.java

I'm writing a celsius-farenheits converter but the program crashes for something that I didn't found
I'm actually trying to use the data binding and the view model but Android Studio founded some issues in ActivityMainBindingImpl.java that I didn't write by myself. Here's the part of code were it founds a problem. It is in line 104 at com.example.convertitorecelsius_farenheit.MainViewModel viewModel = mViewModel; It says "Cannot resolve symbol 'mViewModel'"
There's another problem in line 33 in "super(bindingComponent, root, 0", it says "'ActivityMainBinding()' has private access in 'com.example.convertitorecelsius_farenheit.databinding.ActivityMainBinding'"
The last problem is at line 8 in "public class ActivityMainBindingImpl extends ActivityMainBinding {", the error is in "ActivityMainBinding", it says "Cannot inherit from final 'com.example.convertitorecelsius_farenheit.databinding.ActivityMainBinding'"
Here's the full code where I founded these problems
package com.example.convertitorecelsius_farenheit.databinding;
import com.example.convertitorecelsius_farenheit.R;
import com.example.convertitorecelsius_farenheit.BR;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import android.view.View;
#SuppressWarnings("unchecked")
public class ActivityMainBindingImpl extends ActivityMainBinding {
#Nullable
private static final androidx.databinding.ViewDataBinding.IncludedLayouts sIncludes;
#Nullable
private static final android.util.SparseIntArray sViewsWithIds;
static {
sIncludes = null;
sViewsWithIds = new android.util.SparseIntArray();
sViewsWithIds.put(R.id.cambiaTemperatura, 3);
sViewsWithIds.put(R.id.inputTemperatura, 4);
sViewsWithIds.put(R.id.converti, 5);
}
// views
#NonNull
private final androidx.constraintlayout.widget.ConstraintLayout mboundView0;
// variables
// values
// listeners
// Inverse Binding Event Handlers
public ActivityMainBindingImpl(#Nullable androidx.databinding.DataBindingComponent bindingComponent, #NonNull View root) {
this(bindingComponent, root, mapBindings(bindingComponent, root, 6, sIncludes, sViewsWithIds));
}
private ActivityMainBindingImpl(androidx.databinding.DataBindingComponent bindingComponent, View root, Object[] bindings) {
super(bindingComponent, root, 0
, (android.widget.Button) bindings[3]
, (android.widget.Button) bindings[5]
, (android.widget.EditText) bindings[4]
, (android.widget.TextView) bindings[2]
, (android.widget.TextView) bindings[1]
);
this.mboundView0 = (androidx.constraintlayout.widget.ConstraintLayout) bindings[0];
this.mboundView0.setTag(null);
this.textTemperatura.setTag(null);
this.textView.setTag(null);
setRootTag(root);
// listeners
invalidateAll();
}
#Override
public void invalidateAll() {
synchronized(this) {
mDirtyFlags = 0x2L;
}
requestRebind();
}
#Override
public boolean hasPendingBindings() {
synchronized(this) {
if (mDirtyFlags != 0) {
return true;
}
}
return false;
}
#Override
public boolean setVariable(int variableId, #Nullable Object variable) {
boolean variableSet = true;
if (BR.viewModel == variableId) {
setViewModel((com.example.convertitorecelsius_farenheit.MainViewModel) variable);
}
else {
variableSet = false;
}
return variableSet;
}
public void setViewModel(#Nullable com.example.convertitorecelsius_farenheit.MainViewModel ViewModel) {
this.mViewModel = ViewModel;
synchronized(this) {
mDirtyFlags |= 0x1L;
}
notifyPropertyChanged(BR.viewModel);
super.requestRebind();
}
#Override
protected boolean onFieldChange(int localFieldId, Object object, int fieldId) {
switch (localFieldId) {
}
return false;
}
#Override
protected void executeBindings() {
long dirtyFlags = 0;
synchronized(this) {
dirtyFlags = mDirtyFlags;
mDirtyFlags = 0;
}
java.lang.String viewModelTypeCurrentTemperature = null;
int viewModelConvertiTemperatura = 0;
com.example.convertitorecelsius_farenheit.MainViewModel viewModel = mViewModel;
if ((dirtyFlags & 0x3L) != 0) {
if (viewModel != null) {
// read viewModel.typeCurrentTemperature
viewModelTypeCurrentTemperature = viewModel.getTypeCurrentTemperature();
// read viewModel.convertiTemperatura()
viewModelConvertiTemperatura = viewModel.convertiTemperatura();
}
}
// batch finished
if ((dirtyFlags & 0x3L) != 0) {
// api target 1
this.textTemperatura.setText(viewModelConvertiTemperatura);
androidx.databinding.adapters.TextViewBindingAdapter.setText(this.textView, viewModelTypeCurrentTemperature);
}
}
// Listener Stub Implementations
// callback impls
// dirty flag
private long mDirtyFlags = 0xffffffffffffffffL;
/* flag mapping
flag 0 (0x1L): viewModel
flag 1 (0x2L): null
flag mapping end*/
//end
}
Here's the program I wrote
MainActivity.java
package com.example.convertitorecelsius_farenheit;
import androidx.appcompat.app.AppCompatActivity;
import androidx.lifecycle.ViewModelProvider;
import android.os.Bundle;
import android.widget.EditText;
import com.example.convertitorecelsius_farenheit.databinding.ActivityMainBinding;
public class MainActivity extends AppCompatActivity {
private ActivityMainBinding binding;
private MainViewModel viewModel;
public EditText inputTemperature;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
inputTemperature = findViewById(R.id.inputTemperatura);
binding = ActivityMainBinding.inflate(getLayoutInflater());
binding.setLifecycleOwner(this);
setContentView(binding.getRoot());
viewModel = new ViewModelProvider(this).get(MainViewModel.class);
binding.setViewModel(viewModel);
}
public int getInputTemperature() {
return Integer.parseInt(inputTemperature.toString());
}}
MainViewModel.java
package com.example.convertitorecelsius_farenheit;
import androidx.lifecycle.ViewModel;
public class MainViewModel extends ViewModel {
public int grades;
public boolean isCelsius = false;
MainActivity temperaturaInserita = new MainActivity();
//private final MutableLiveData<String> _TypeCurrentTemperatura = new MutableLiveData<>();
private String _TypeCurrentTemperatura = ""; //indicates if the temperature is celsius or farenheit
public String getTypeCurrentTemperature() {
return _TypeCurrentTemperatura;
}
public void changeTypeTemperature() {
if (isCelsius) {
isCelsius = false;
_TypeCurrentTemperatura = "F°";
} else {
isCelsius = true;
_TypeCurrentTemperatura = "C°";
}
}
public int convertiTemperatura() { //convertTemperature (that's the italian name)
if (isCelsius) {
grades = (int) ((temperaturaInserita.getInputTemperature() * 1.8) + 32);
} else {
grades = (int) ((int) ((temperaturaInserita.getInputTemperature()) -32) * .5556);
}
return grades;
}}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools">
<data>
<variable
name="viewModel"
type="com.example.convertitorecelsius_farenheit.MainViewModel" />
</data>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="348dp"
android:text="#{viewModel.typeCurrentTemperature}"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/cambiaTemperatura"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="80dp"
android:text="c--f"
app:layout_constraintBottom_toTopOf="#+id/textView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent" />
<EditText
android:id="#+id/inputTemperatura"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="52dp"
android:ems="10"
android:inputType="number"
app:layout_constraintBottom_toTopOf="#+id/cambiaTemperatura"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="#+id/converti"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="273dp"
android:layout_marginBottom="274dp"
android:text="converti"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.498"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/inputTemperatura"
app:layout_constraintVertical_bias="1.0" />
<TextView
android:id="#+id/textTemperatura"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="23dp"
android:text="#{viewModel.convertiTemperatura()}"
android:textSize="24sp"
app:layout_constraintBottom_toTopOf="#+id/textView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
Can somebody help me :)

There are some things wrong in your code:
You're setting the activity view twice, remove the first line: setContentView(R.layout.activity_main);
Since you're using view binding (different thing from data binding), you dont need to call findViewById replace it with inputTemperature = binding.inputTemperatura
If you're already using data binding why bother with view binding? You can do all input/output related tasks in data binding.
You SHOULD NEVER instantiate ANDROID activities or hold a reference to it, this is task of the Android framework, remove the line MainActivity temperaturaInserita = new MainActivity(); of your viewmodel.
Check this answer it may help you: Android : Difference between DataBinding and ViewBinding
EDIT
You don't need to call methods of your activity from your viewmodel, this is a bad practice, because if the system destroys your activity you will end with a NPE in your view model, you have 2 options:
Use two way data binding to set/get the value of the temperature from the viewmodel: https://bignerdranch.com/blog/two-way-data-binding-on-android-observing-your-view-with-xml/
Change the function in the view model to receive as argument the value of the input text.
I recommend to go with first option, this way you will have the updated value always in your view model and also can survive config changes.
And remember don't matter what, your viewmodel SHOULD never have a reference to the Activity.

How can i fetch Whatsapp user's status and display in my android app?

I want to fetch live status from Whatsapp into my android activity. Is it possible to do this? If yes your guidance will be really appreciated.
Please see the image i want to make an activity containing all the statuses. Just like the image
Thanks

WhatsApp store showed status to your device memory or sd card WhatsApp/Media/.Statuses folder. This folder is hidden. You can fetch data from there.

For Kotlin Lover
companion object {
const val WHATSAPP_STATUS_FOLDER_PATH = "/WhatsApp/Media/.Statuses/"
}
fun getImagePath(): ArrayList<String> {
// image path list
val list: ArrayList<String> = ArrayList()
// fetching file path from storage
val file = File(Environment.getExternalStorageDirectory().toString() + WHATSAPP_STATUS_FOLDER_PATH)
val listFile = file.listFiles()
if (listFile != null && listFile.isNullOrEmpty()) {
Arrays.sort(listFile, LastModifiedFileComparator.LASTMODIFIED_REVERSE)
}
if (listFile != null) {
for (imgFile in listFile) {
if (
imgFile.name.endsWith(".jpg")
|| imgFile.name.endsWith(".jpeg")
|| imgFile.name.endsWith(".png")
) {
val model = imgFile.absolutePath
list.add(model)
}
}
}
// return imgPath List
return list
}

There You Go
final String WHATSAPP_STATUSES_LOCATION = "/WhatsApp/Media/.Statuses";
RecyclerView mRecyclerViewMediaList = findViewById(R.id.recyclerViewMedia);
LinearLayoutManager mLinearLayoutManager = new LinearLayoutManager(this);
mRecyclerViewMediaList.setLayoutManager(mLinearLayoutManager);
ListAdapter recyclerViewMediaAdapter = new ListAdapter(MainActivity.this, this.getListFiles(new File(Environment.getExternalStorageDirectory().toString() + WHATSAPP_STATUSES_LOCATION)));
mRecyclerViewMediaList.setAdapter(recyclerViewMediaAdapter);
private ArrayList<File> getListFiles(File parentDir) {
ArrayList<File> inFiles = new ArrayList<>();
File[] files;
files = parentDir.listFiles();
if (files != null) {
for (File file : files) {
Log.e("check", file.getName());
if (file.getName().endsWith(".jpg") ||
file.getName().endsWith(".gif") ||
file.getName().endsWith(".mp4")) {
if (!inFiles.contains(file))
inFiles.add(file);
}
}
}
return inFiles;
}
Adapter
public class ListAdapter extends RecyclerView.Adapter<ListAdapter.MyViewHolder> {
final Context context;
final ArrayList<File> modelFeedArrayList;
private static final String DIRECTORY_TO_SAVE_MEDIA_NOW = "/WhatsappStatus/";
public ListAdapter(Context context, final ArrayList<File> modelFeedArrayList) {
this.context = context;
this.modelFeedArrayList = modelFeedArrayList;
}
#NonNull
#Override
public MyViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_media_row_item, parent, false);
return new MyViewHolder(view);
}
#Override
public void onBindViewHolder(#NonNull final MyViewHolder holder, int position) {
File currentFile = modelFeedArrayList.get(position);
if (currentFile.getAbsolutePath().endsWith(".mp4")) {
holder.cardViewImageMedia.setVisibility(View.GONE);
holder.cardViewVideoMedia.setVisibility(View.VISIBLE);
Uri video = Uri.parse(currentFile.getAbsolutePath());
holder.videoViewVideoMedia.setVideoURI(video);
holder.videoViewVideoMedia.setOnPreparedListener(mp -> {
mp.setLooping(true);
holder.videoViewVideoMedia.start();
});
} else {
holder.cardViewImageMedia.setVisibility(View.VISIBLE);
holder.cardViewVideoMedia.setVisibility(View.GONE);
Bitmap myBitmap = BitmapFactory.decodeFile(currentFile.getAbsolutePath());
holder.imageViewImageMedia.setImageBitmap(myBitmap);
}
}
#Override
public int getItemCount() {
return modelFeedArrayList.size();
}
public static class MyViewHolder extends RecyclerView.ViewHolder {
ImageView imageViewImageMedia;
VideoView videoViewVideoMedia;
CardView cardViewVideoMedia;
CardView cardViewImageMedia;
public MyViewHolder(#NonNull View itemView) {
super(itemView);
imageViewImageMedia = itemView.findViewById(R.id.imageViewImageMedia);
videoViewVideoMedia = itemView.findViewById(R.id.videoViewVideoMedia);
cardViewVideoMedia = itemView.findViewById(R.id.cardViewVideoMedia);
cardViewImageMedia = itemView.findViewById(R.id.cardViewImageMedia);
}
}
}
Row XML
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="300dp"
android:layout_margin="10dp">
<androidx.cardview.widget.CardView
android:id="#+id/cardViewVideoMedia"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:visibility="gone">
<VideoView
android:id="#+id/videoViewVideoMedia"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1" />
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:id="#+id/cardViewImageMedia"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true">
<ImageView
android:id="#+id/imageViewImageMedia"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_alignParentEnd="true"
android:layout_weight="1"
android:scaleType="fitCenter"
android:contentDescription="#string/todo" />
</androidx.cardview.widget.CardView>
</RelativeLayout>
add to your AndroidManifest.xml.
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:requestLegacyExternalStorage="true"
Android 10 File.listFiles() may return null, see File exists and IS directory, but listFiles() returns null

Well all the content of WhatsApp user status are locally stored in /WhatsApp/.Statuses folder except text Statuses. You can simply load all the images and videos that are in the folder in grid view and give options to save and share.

Problem of path and file not found solved with this.
You can try this Path. it may be helpful for you.
For Android-10 and above
File(Environment.getExternalStorageDirectory() + File.separator + "Android/media/com.whatsapp/WhatsApp/Media/.Statuses")
Below Android-10 Version
File(Environment.getExternalStorageDirectory() + File.separator + "WhatsApp/Media/.Statuses")

Show progress while loading WebViews inside RecyclerView

In my android activity I am using a RecyclerView which contains number of MathViews. MathView is a third-party library which shows LaTeX contents (This
is somewhat similar to WebView. Implementation of MathView can be seen on this android project. github.com/lingarajsankaravelu/Katex).
The problem is, for rendering the content of this MathView, it takes a little bit longer time. As I have used few MathView components inside a RecycleView and the rendering time increases more. Therefore when the Activity started, at first in the view, some white space are shown for few seconds and then the relevant content is rendered.
As a solution for this problem, I need to show a progress bar until all the layout content of the Activity is completely rendered and after rendering is completed show up the Activity.
The relavent source codes are shown below.
MathView;
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:auto="http://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:id="#+id/equation_item"
android:clickable="true"
android:foreground="?attr/selectableItemBackground">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardCornerRadius="4dp">
<katex.hourglass.in.mathlib.MathView
android:id="#+id/math_view"
android:clickable="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="left"
app:setClickable="true"
app:setTextColor="#color/colorPrimary"
app:setTextSize="10sp"
/>
</android.support.v7.widget.CardView>
<include layout="#layout/item_divider"/>
</LinearLayout>
Recycler View;
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="com.a37moons.mathcheatsheets.ContentActivity"
tools:showIn="#layout/activity_content">
<android.support.v7.widget.RecyclerView
android:id="#+id/recycler_view_equations"
android:layout_width="match_parent"
android:layout_height="match_parent">
</android.support.v7.widget.RecyclerView>
</android.support.v4.widget.NestedScrollView>
ViewHolder Class
public class ViewHolder extends RecyclerView.ViewHolder {
public MathView mathView;
public ViewHolder(View itemView) {
super(itemView);
mathView = itemView.findViewById(R.id.math_view);
}
}
Recycler Adapter Class
public class RecyclerAdapterEquations extends RecyclerView.Adapter<ViewHolder>{
private List<Equation> equations;
View view;
public RecyclerAdapterEquations(List<Equation> equations){
this.equations = equations;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.equation_view_item,parent,false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
Equation sampleEquation = equations.get(position);
holder.mathView.setDisplayText(sampleEquation.equationString);
// holder.mathView2.setText(sampleEquation.equationString);
Log.d("MATH_APP","position "+position+" mathview text set ");
}
#Override
public int getItemCount() {
return equations.size();
}
}
Finally the implementation.
RecyclerView recyclerView;
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(linearLayoutManager);
recyclerView.setHasFixedSize(true);
recyclerView.setAdapter(new RecyclerAdapterEquations(sample));

With the help of the answer of written by azizbekian, I found the answer to my question.
As mentioned in that answer, this is the procedure;
Introduce a ProgressBar or something similar inside xml file. This view should be declared after RecyclerView in order to be
drawn on top of RecyclerView
Make RecyclerView invisible (via android:visibility="invisible")
Now RecyclerView will be actually laid out but not shown on the screen. You need a callback, that would be executed some time
later when RecyclerView is already setup. Within this callback you
will hide progress bar and change visibility of RecyclerView to
View.VISIBLE.
Now as the katex.hourglass.in.mathlib.MathView is a subclass of android WebView, we can set a WebChromeClient to this. Then, we can get the percentage of progress of loading the content.
int loadedPercentage = 0;
boolean loaded = false;
mathView.setWebChromeClient(new WebChromeClient(){
public void onProgressChanged(WebView view, int newProgress) {
super.onProgressChanged(view, newProgress);
loadedPercentage = newProgress;
if(newProgress==100) {
//When the loading is 100% completed; todo
loaded = true;
Toast.makeText(getContext(), newProgress + "LOADED COMPLETELY", Toast.LENGTH_SHORT).show();
}
}
});
We can implement a progress bar to show the loadedPercentage. When the loadedPercentage is 100, we can see the relavent content is completely loaded.
So I editted the MathView class as follows;
public class MyMathView extends WebView {
private String TAG = "KhanAcademyKatexView";
private static final float default_text_size = 18;
private String display_text;
private int text_color;
private int text_size;
private boolean clickable = false;
private boolean loaded = false;
private int loadedPercentage = 0;
public MyMathView(Context context) {
//...
}
public MyMathView(Context context, AttributeSet attrs) {
//...
}
public boolean isLoaded(){
return loaded;
}
public int getLoadedPercentage() {
return loadedPercentage;
}
public void setViewBackgroundColor(int color)
{
//...
}
private void pixelSizeConversion(float dimension) {
//...
}
private void configurationSettingWebView()
{
//...
}
public void setDisplayText(String formula_text) {
this.display_text = formula_text;
loadData();
}
private String getOfflineKatexConfig()
{
String offline_config = "<!DOCTYPE html>\n" +
"<html>\n" +
" <head>\n" +
" <meta charset=\"UTF-8\">\n" +
" <title>Auto-render test</title>\n" +
" <link rel=\"stylesheet\" type=\"text/css\" href=\"file:///android_asset/katex/katex.min.css\">\n" +
" <link rel=\"stylesheet\" type=\"text/css\" href=\"file:///android_asset/themes/style.css\">\n" +
" <script type=\"text/javascript\" src=\"file:///android_asset/katex/katex.min.js\"></script>\n" +
" <script type=\"text/javascript\" src=\"file:///android_asset/katex/contrib/auto-render.min.js\"></script>\n" +
" <style type='text/css'>"+
"body {"+
"margin: 0px;"+
"padding: 0px;"+
"font-size:" +this.text_size+"px;"+
"color:"+getHexColor(this.text_color)+";"+
" }"+
" </style>"+
" </head>\n" +
" <body>\n" +
" {formula}\n" +
" <script>\n" +
" renderMathInElement(\n" +
" document.body\n" +
" );\n" +
" </script>\n" +
" </body>\n" +
"</html>";
String start = "<html><head><meta http-equiv='Content-Type' content='text/html' charset='UTF-8' /><style> body {"+
" white-space: nowrap;}</style></head><body>";
String end = "</body></html>";
//return start+offline_config.replace("{formula}",this.display_text)+end;
return offline_config.replace("{formula}",this.display_text);
}
private void loadData()
{
if (this.display_text!=null)
{
loadedPercentage = 0;
loaded = false;
this.setWebChromeClient(new WebChromeClient(){
public void onProgressChanged(WebView view, int newProgress) {
super.onProgressChanged(view, newProgress);
loadedPercentage = newProgress;
if(newProgress==100) {
loaded = true;
Toast.makeText(getContext(), newProgress + "LOADED", Toast.LENGTH_SHORT).show();
}
}
});
this.loadDataWithBaseURL("null",getOfflineKatexConfig(),"text/html","UTF-8","about:blank");
}
}
public void setTextSize(int size)
{
//...
}
public void setTextColor(int color)
{
//...
}
private String getHexColor(int intColor)
{
//...
}
private void setDefaultTextColor(Context context) {
//...
}
private void setDefaultTextSize() {
//...
}
}

I cannot see the question itself in the description, thus I will refer to your statement in comments section:
I just need a solution to show a progress bar until all the layout content of the Activity is completely rendered and then after rendering is completed, show up the Activity.
Introduce a ProgressBar or something similar inside xml file. This view should be declared after RecyclerView in order to be drawn on top of RecyclerView
Make RecyclerView invisible (via android:visibility="invisible")
Now RecyclerView will be actually laid out but not shown on the screen. You need a callback, that would be executed some time later when RecyclerView is already setup. Within this callback you will hide progress bar and change visibility of RecyclerView to View.VISIBLE.
The problem boils to attaching "children of RecyclerView are initialized" listener.
As long as katex.hourglass.in.mathlib.MathView is a subclass of android.webkit.WebView, that means, that in order to get notified about load finished event you should register WebViewClient in following approach:
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
Equation sampleEquation = equations.get(position);
holder.mathView.setDisplayText(sampleEquation.equationString);
holder.mathView.setWebViewClient(new WebViewClient() {
public void onPageFinished(WebView view, String url) {
// No longer interested in upcoming events - unregister
view.setWebViewClient(null);
// Now data is loaded, can make RecyclerView visible
}
});
...
}
Note, this will make RecyclerView to be shown as soon as any of the MathViews is loaded. You can wait all of them to be loaded depending on your requirement.

Don't call
setContentView(layout);
as usual, load data in adapter first, thn call
setContentView(layout);
After that set adapter to recyclerview .

How to make a horizontal ContextMenu?

I have made an Activity called Accounts and I want to add a horizontal ContextMenu. This may look like the cut, copy and paste options. Is there any way to add this horizontal custom menu onLongClick on the list items?
Here's what I've got so far.
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
LayoutInflater inflater = getLayoutInflater().from(this);
View view = inflater.inflate(R.layout.custom_listview, null, false);
menu.setHeaderView(view);
menu.add("Delete");
menu.add("Edit");
}
#Override
public boolean onContextItemSelected(MenuItem item) {
AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
int position = info.position;
View v = listView.getChildAt(position);
TextView typeTv = v.findViewById(R.id.custom_listview_type);
TextView userTv = v.findViewById(R.id.custom_listview_user);
TextView passTv = v.findViewById(R.id.custom_listview_password);
if (item.getTitle().equals("Delete")) {
db.execSQL("delete from user_added_accounts where accountType = '" + typeTv.getText().toString() + "' and username = '" + userTv.getText().toString() + "';");
recreate();
}
if (item.getTitle().equals("Edit")) {
update(typeTv.getText().toString(), userTv.getText().toString(), passTv.getText().toString());
}
return true;
}
And the current UI looks like this.
Here is something like I want,

Simply you can achieve by QuickAction library.
https://github.com/piruin/quickaction
https://github.com/lorensiuswlt/NewQuickAction
Hope this will help you!!

I think the thing you need is the PopupWindow. Its easier to implement and has its custom layout setting option. The PopupWindow can be set in custom position as you wish and the idea of implementing a sample copy/paste UI that you are thinking of, can be served with the implementation of PopupWindow as well.
I found this answer very informative if you want to implement your situation with PopupWindow instead of implementing it with context menu.
In the above answer that I mentioned and provided a like to, has a PopupWindow which has a TextView only. You might implement any custom/complex UI instead of having a simple TextView like its shown there.
I hope that helps.
Update
As asked in the comment that getting locations of the position of PopupWindow can be set dynamically as well. I am referring to another link, so that you can check the implementation from there as well.
Here's the implementation of using PopupWindow in a list.

So , I wrote below code few year back. You need to make two class first is PopUp and second is TringleView.
PopUp :- Make dialog box and open into near your view(where you want
to open dialog). You can change popup bg color.
TringleView :- Make tringle view or you can say pointed arrow.You can change pointed arrow bg color.
View contentView = ((FragmentActivity)v.getContext()).getLayoutInflater().inflate(R.layout.edit_delete_layout,getAttachedRecyclerView(),false);
// this view denote where you click or you want to open dialog near
PopUp.showPopupOnView(((FragmentActivity) v.getContext()).getSupportFragmentManager(),contentView,view,false);
PopUp.class
public class PopUp extends DialogFragment {
protected int targetX;
protected int targetY;
protected int targetWidth;
protected int targetHeight;
protected Bitmap targetViewImage;
protected View contentView;
private SmartWorksPopUpViewHolder fragmentViewHolder;
private static int bgDrawable = R.drawable.round_corner_white_bg;
protected static int ONE_DIP;
private static int arrowBgColor = R.color.border_color;
private static int arrowWidthMultiple = 25;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (ONE_DIP == 0) {
ONE_DIP = (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP, 1, getResources()
.getDisplayMetrics());
}
setStyle(DialogFragment.STYLE_NO_TITLE, android.R.style.Theme_Translucent);
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
AbsoluteLayout parent = new AbsoluteLayout(getActivity());
parent.setId(R.id.parentLayout);
return parent;
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
this.fragmentViewHolder = createViewHolder(view);
bindView(fragmentViewHolder);
}
protected SmartWorksPopUpViewHolder createViewHolder(
View fragmentView) {
return new SmartWorksPopUpViewHolder(fragmentView, contentView);
}
private void bindView(SmartWorksPopUpViewHolder vh) {
if (fragmentViewHolder != null) {
setupTargetDummyView(vh);
boolean showOnTop = shouldShowOnTop();
setupArrow(vh, showOnTop);
setupContent(vh, showOnTop);
}
}
protected void setupContent(SmartWorksPopUpViewHolder vh, boolean showOnTop) {
final int y;
AbsoluteLayout.LayoutParams arrowParams = (android.widget.AbsoluteLayout.LayoutParams) vh.arrow
.getLayoutParams();
int measureHeight = View.MeasureSpec.makeMeasureSpec(
ViewGroup.LayoutParams.WRAP_CONTENT, View.MeasureSpec.UNSPECIFIED);
int measureWidth = View.MeasureSpec.makeMeasureSpec(
getActivity().getWindow().getDecorView().getWidth(), View.MeasureSpec.EXACTLY);
vh.popupView.measure(measureWidth, measureHeight);
if (showOnTop) {
y = this.targetY - vh.popupView.getMeasuredHeight() + ONE_DIP;
} else {
y = arrowParams.y + arrowParams.height - ONE_DIP * 2;
}
updateAbsoluteLayoutParams(
getActivity().getResources().getDimensionPixelOffset(R.dimen.sixty_dp),
y,
getActivity().getWindow().getDecorView().getWidth() -
getActivity().getResources().getDimensionPixelOffset(R.dimen.seventy_dp),
ViewGroup.LayoutParams.WRAP_CONTENT, vh.popupView);
vh.parent.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
exit();
}
});
}
private void setupArrow(SmartWorksPopUpViewHolder vh, boolean showOnTop) {
final int arrowHeight = 15 * ONE_DIP;
final int arrowWidth = arrowWidthMultiple * ONE_DIP;
vh.arrow.setDirectionAndColor(showOnTop ? "down" : "top", vh.popupView.getContext().getResources().getColor(arrowBgColor));
final int x = (int) (targetX + targetWidth / 3 - arrowWidth / 2);
final int y = targetY + (showOnTop ? -arrowHeight : targetHeight);
updateAbsoluteLayoutParams(x, y, arrowWidth, arrowHeight, vh.arrow);
}
private void setupTargetDummyView(SmartWorksPopUpViewHolder vh) {
vh.targetViewDummy.setImageBitmap(targetViewImage);
updateAbsoluteLayoutParams(targetX, targetY, targetWidth, targetHeight, vh.targetViewDummy);
}
protected void updateAbsoluteLayoutParams(int x, int y, int width, int height, View view) {
AbsoluteLayout.LayoutParams layoutParams =
(android.widget.AbsoluteLayout.LayoutParams) view.getLayoutParams();
layoutParams.x = x;
layoutParams.y = y;
layoutParams.height = height;
layoutParams.width = width;
view.setLayoutParams(layoutParams);
}
private boolean shouldShowOnTop() {
int windowHeight = getActivity().getWindow().getDecorView().getHeight();
int windowMid = windowHeight / 4;
return targetY > windowMid;
}
#Override
public void onDestroyView() {
this.fragmentViewHolder = null;
super.onDestroyView();
}
protected static class SmartWorksPopUpViewHolder {
protected AbsoluteLayout parent;
protected View popupView;
protected TringleView arrow;
protected AppCompatImageView targetViewDummy;
protected SmartWorksPopUpViewHolder(View fragmentView, View content) {
this.parent = (AbsoluteLayout) fragmentView;
final Context mContext = fragmentView.getContext();
this.popupView = content;
this.arrow = new TringleView(mContext);
this.targetViewDummy = new SmartWorksAppCompactImageView(mContext);
this.parent.addView(popupView);
this.parent.addView(arrow);
this.parent.addView(targetViewDummy);
this.parent.setBackgroundColor(0x00000000);
content.setBackgroundResource(bgDrawable);
}
}
public static PopUp showPopupOnView(FragmentManager fm, View contentView, View targetView, boolean showTargetView) {
int[] location = new int[2];
targetView.getLocationInWindow(location);
PopUp fragment = new PopUp();
fragment.targetX = location[0];
fragment.targetY = (int) (location[1] - TypedValue
.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 25,
targetView.getResources().getDisplayMetrics()));
fragment.targetWidth = targetView.getMeasuredWidth();
fragment.targetHeight = targetView.getMeasuredHeight();
fragment.contentView = contentView;
fragment.show(fm, "offer");
return fragment;
}
public void exit() {
dismiss();
}
public static void setArrowBackgroundColor(int color) {
arrowBgColor = color;
}
public static void setArrowWidthMultiple(int arrowWidth) {
arrowWidthMultiple = arrowWidth;
}
}
TringleView.class
public class TringleView extends View {
private String direction;
private int color;
public TringleView(Context context) {
super(context);
setDirectionAndColor("right", Color.RED);
}
public TringleView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setDirectionAndColor(attrs.getAttributeValue(null, "direction"), Color.RED);
}
public TringleView(Context context, AttributeSet attrs) {
super(context, attrs);
setDirectionAndColor(attrs.getAttributeValue(null, "direction"), Color.RED);
}
public void setDirectionAndColor(String direction, int color) {
if (direction != null && !direction.equals(this.direction) || this.color != color) {
createTriangleDrawable(direction, color);
}
}
private void createTriangleDrawable(String string, int color) {
int width = MeasureSpec.makeMeasureSpec(30, MeasureSpec.UNSPECIFIED);
int height = MeasureSpec.makeMeasureSpec(20, MeasureSpec.UNSPECIFIED);
Path path = new Path();
if (string == null) {
string = "right";
}
if (string.equals("top")) {
path.moveTo(0, height);
path.lineTo(width / 2, 0);
path.lineTo(width, height);
} else if (string.equals("left")) {
path.moveTo(width, 0);
path.lineTo(0, height / 2);
path.lineTo(width, height);
} else if (string.equals("right")) {
path.moveTo(0, 0);
path.lineTo(width, height / 2);
path.lineTo(0, height);
} else if (string.equals("down")) {
path.moveTo(0, 0);
path.lineTo(width / 2, height);
path.lineTo(width, 0);
}
path.close();
ShapeDrawable shapeDrawable = new ShapeDrawable(new PathShape(path, width, height));
shapeDrawable.getPaint().setColor(color);
setBackground(shapeDrawable);
this.color = color;
this.direction = string;
}
}
edit_delete_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
app:cardCornerRadius="#dimen/five_dp"
android:layout_margin="#dimen/ten_dp"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<LinearLayout
app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:weightSum="5"
android:gravity="center"
android:orientation="horizontal"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<sis.com.smartworks.widget.SmartWorksTextView
android:id="#+id/share"
android:textSize="#dimen/smallest_text_size"
android:textColor="#color/black"
android:visibility="visible"
android:gravity="center"
android:paddingRight="#dimen/four_dp"
android:paddingLeft="#dimen/four_dp"
android:paddingTop="#dimen/ten_dp"
android:paddingBottom="#dimen/ten_dp"
android:text="Share"
android:layout_weight="1"
android:textStyle="bold"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<View
android:layout_width="1dp"
android:background="#color/grey_unselect"
android:layout_height="match_parent" />
<sis.com.smartworks.widget.SmartWorksTextView
android:id="#+id/reportSpam"
android:textSize="#dimen/smallest_text_size"
android:textColor="#color/black"
android:visibility="visible"
android:gravity="center"
android:paddingRight="#dimen/four_dp"
android:paddingLeft="#dimen/four_dp"
android:paddingTop="#dimen/ten_dp"
android:paddingBottom="#dimen/ten_dp"
android:text="Spam"
android:layout_weight="1"
android:textStyle="bold"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<View
android:layout_width="1dp"
android:background="#color/grey_unselect"
android:layout_height="match_parent" />
<!--<View-->
<!--android:layout_width="match_parent"-->
<!--android:layout_marginLeft="#dimen/three_dp"-->
<!--android:layout_marginRight="#dimen/three_dp"-->
<!--android:background="#color/white"-->
<!--android:layout_height="#dimen/one_dp" />-->
<sis.com.smartworks.widget.SmartWorksTextView
android:id="#+id/edit"
android:textSize="#dimen/smallest_text_size"
android:textColor="#color/black"
android:gravity="center"
android:paddingRight="#dimen/four_dp"
android:paddingLeft="#dimen/four_dp"
android:paddingTop="#dimen/ten_dp"
android:paddingBottom="#dimen/ten_dp"
app:swFontName="robotoNormal"
android:layout_weight="1"
android:text="#string/edit"
android:textStyle="bold"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<View
android:layout_width="1dp"
android:background="#color/grey_unselect"
android:layout_height="match_parent" />
<!--<View-->
<!--android:layout_width="match_parent"-->
<!--android:layout_marginLeft="#dimen/three_dp"-->
<!--android:layout_marginRight="#dimen/three_dp"-->
<!--android:background="#color/white"-->
<!--android:layout_height="#dimen/one_dp" />-->
<sis.com.smartworks.widget.SmartWorksTextView
android:id="#+id/delete"
android:textSize="#dimen/smallest_text_size"
android:textColor="#color/black"
android:gravity="center"
android:paddingRight="#dimen/four_dp"
android:paddingLeft="#dimen/four_dp"
android:paddingTop="#dimen/ten_dp"
android:paddingBottom="#dimen/ten_dp" android:layout_weight="1"
android:text="#string/delete"
android:textStyle="bold"
android:layout_width="0dp"
android:layout_height="wrap_content" />
<View
android:layout_width="1dp"
android:background="#color/grey_unselect"
android:layout_height="match_parent" />
<sis.com.smartworks.widget.SmartWorksTextView
android:id="#+id/cancel"
android:textSize="#dimen/smallest_text_size"
android:textColor="#color/black"
android:gravity="center"
android:layout_weight="1"
android:visibility="visible"
android:paddingRight="#dimen/four_dp"
android:paddingLeft="#dimen/four_dp"
android:paddingTop="#dimen/ten_dp"
android:paddingBottom="#dimen/ten_dp"
android:textStyle="bold"
android:text="#string/select_cancel"
android:layout_width="0dp"
android:layout_height="wrap_content" />
</LinearLayout>
</android.support.v7.widget.CardView>
Result
So if you want to make view as horizontal then you need to make horizontal layout according to your requirement. So can do this task to change your edit_delete_layout.xml which your putting into contentView then pass to Popup class method.
Note:- You can customise popup class according to your requirement and I know this code having so many deprecated view so you can update yourself.

To show compact contextual menu you need to create ActionMode for the Menu, let me show you how:
Suppose your action menu XML have delete, copy and forward actions:
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="#+id/action_copy"
android:icon="#drawable/ic_vector_menu_copy"
android:title="Copy"
app:showAsAction="always" />
<item
android:id="#+id/action_delete"
android:icon="#drawable/ic_vector_menu_delete"
android:title="Delete"
app:showAsAction="always" />
<item
android:id="#+id/action_forward"
android:icon="#drawable/ic_vector_menu_forward"
android:title="Forward"
app:showAsAction="always" />
</menu>
Create your action menu in your Activity
//Global variable in Activity/Fragment to manage close the menu
private ActionMode mActionMode;
//Action mode callbacks
//Contextual Action bar - for showing delete/copy/... on action bar
private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() {
// Called when the action mode is created; startActionMode() was called
#Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
// Inflate a menu resource providing context menu items
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.menu_contextual_action, menu);
return true;
}
// Called each time the action mode is shown.
// Always called after onCreateActionMode, but
// may be called multiple times if the mode is invalidated.
#Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false; // Return false if nothing is done
}
// Called when the user selects a contextual menu item
#Override
public boolean onActionItemClicked(final ActionMode mode, MenuItem item) {
switch (item.getItemId()) {
case R.id.action_delete:
//Do the delete action
//mAdapter.resetSelection();
mode.finish(); // Action picked, so close the TAB
//showToast "Deleted successfully"
return true;
case R.id.action_copy:
//mAdapter.resetSelection();
MyClipboardManager.copyToClipboard(ChatDetailActivity.this, mAdapter.getSelectedMessageText());
mode.finish(); // Action picked, so close the TAB
//showToast "Text copied to clipboard"
return true;
default:
return false;
}
}
// Called when the user exits the action mode
#Override
public void onDestroyActionMode(ActionMode mode) {
mActionMode = null;
//mAdapter.resetSelection();
}
};
#Override
public void onBackPressed() {
//Closing menu first if it's visible rather than doing the back press action
if (mActionMode != null && mActionMode.getMenu().hasVisibleItems()) {
mActionMode.finish();
return;
}
super.onBackPressed();
}
#Override
public void onDestroy() {
//Closing menu
if (mActionMode != null) {
mActionMode.finish();
}
super.onDestroy();
}
*Set the callback to the global action mode variable
mActionMode = startSupportActionMode(mActionModeCallback);
*Set title to the menu
mActionMode.setTitle("Menu title");
*Invalidate the menu after settings value
mActionMode.invalidate();
Style to manage compact contextual menu
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
<item name="android:windowDisablePreview">true</item>
<!--CONTEXTUAL action MODE-->
<item name="android:windowContentOverlay">#null</item>
<!--ActionMode background color-->
<!-- <item name="android:actionModeBackground">#color/colorPrimary</item>-->
<!--To Overlay existing toolbar, NOTE We are not using android: to let it work everywhere-->
<item name="windowActionModeOverlay">true</item>
<item name="actionModeStyle">#style/AppActionModeStyle</item>
<item name="android:actionModeCloseDrawable">#drawable/ic_arrow_back_24dp</item>
</style>
<style name="AppActionModeStyle" parent="#style/Widget.AppCompat.ActionMode">
<!--ActionMode background color-->
<item name="background">#color/colorPrimary</item>
<!--ActionMode text title color-->
<item name="titleTextStyle">#style/ActionModeTitleTextStyle</item>
</style>
<style name="ActionModeTitleTextStyle" parent="#style/TextAppearance.AppCompat.Widget.ActionMode.Title">
<item name="android:textColor">#android:color/white</item>
</style>

EditText on demand widget

I'd like to have a TextView display text, and when you click/longclick on it, a textbox should "show up" and allow editing of said text. When you're done editing (onkey enter i suppose) it should revert back to a textview with the updated text...
I'm wondering if it's feasable to implement such a widget or should I hack a workaround? Tips and suggestions are very welcome.
If you need further idea of what I mean, just go to your e.g. (windows) skype profile and see for yourself.
EDIT:
Clarification: I'm specifically asking for a widget or such which is a textview until clicked on, then transforms to an edittext containing the same text; once done editing it transforms back to a textview representing the new changed text. Thats what i mean by "edittext on demand widget".
But I'm hoping to get something better than
public class Widget {
TextView text;
EditText edit;
String textToRepresent;
//...
}

You have a few different options here.
First you will have to register an onClick or onLongClick to the TextView that you want to make interactive. Just make sure that the user knows it's clickable
Then have your onClick function start a DialogFragment. I like to create show functions. Note that you can use the support libraries here to make your app backwards compatible.
private void showDialog() {
MyDialogFragment dialog = new MyDialogFragment();
dialog.show(getSupportFragmentManager(), "dialog");
}
The DialogFragment is pretty straight forward. In your onCreateView you'll inflate the View that you'll want to display to the user. You can alternatively wrap it with a simple AlertDialogBuilder if you don't want to go custom.
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.your_dialog_layout);
mTitleEditText = (TextView) view.findViewById(R.id.title);
mTitleEditText.setOnClickListener(this);
return view;
}
After your findViewByIds set your onClickListeners.
The last thing you have to take care of is getting data back into your original TextView.
You can do this by creating a public method in your Activity that you can call from inside of your DialogFragment. Something like this
#Override
public void onClick(View v) {
int clickedId = v.getId();
if (clickedId == mDoneButton.getId()) {
MyActivity activity = (MyActivity)getActivity();
mTitle = mTitleEditText.getText().toString();
activity.setText(mTitle);
dismiss();
}
}
I would recommend using a DialogFragment because it will handle your life cycle nicely.
However, another option would be to create a new Activity themed to be a dialog
<activity android:theme="#android:style/Theme.Dialog" />
Then you can startActivityForResult to display your dialog and then capture your results in onActivityResult

Here is my solution. I just give you the basic one. Create a TextView in front of EditText and two Button OK,Cancel (You can change to ImageButton like Skype). Change the visiblity of two view. The code is so simple without comment. You can add some null checking according your logic.
public class CompoundTextView extends RelativeLayout implements OnClickListener {
private EditText edt;
private TextView txt;
RelativeLayout layout;
public SkypeTextView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
#Override
protected void onFinishInflate() {
super.onFinishInflate();
edt = (EditText) findViewById(R.id.edt);
txt = (TextView) findViewById(R.id.txt_name);
layout = (RelativeLayout) findViewById(R.id.layout);
Button ok = (Button) findViewById(R.id.ok_btn);
Button cancel = (Button) findViewById(R.id.cancel_btn);
ok.setOnClickListener(this);
cancel.setOnClickListener(this);
txt.setOnClickListener(this);
}
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.ok_btn:
String editString = edt.getText().toString();
txt.setText(editString);
layout.setVisibility(View.INVISIBLE);
txt.setVisibility(View.VISIBLE);
break;
case R.id.cancel_btn:
layout.setVisibility(View.INVISIBLE);
txt.setVisibility(View.VISIBLE);
break;
case R.id.txt_name:
txt.setVisibility(View.INVISIBLE);
layout.setVisibility(View.VISIBLE);
break;
}
}
}
Create a XML skypetextview. You can customize font and background to make it's prettier.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<TextView
android:id="#+id/txt_name"
android:layout_width="fill_parent"
android:layout_height="100dp"
android:textColor="#FFFFFF"
android:textSize="14sp"
android:background="#ff0000" />
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="invisible"
android:id="#+id/layout" >
<EditText
android:id="#+id/edt"
android:layout_width="270dp"
android:layout_height="100dp" />
<Button
android:id="#+id/ok_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/edt"
android:text="OK" />
<Button
android:id="#+id/cancel_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/ok_btn"
android:layout_toRightOf="#id/edt"
android:text="Cancel" />
</RelativeLayout>
</RelativeLayout>
add (or include) this view to the layout you want.
Example :
public class TestActivity extends Activity {
SkypeTextView test;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
LayoutInflater inflate = getLayoutInflater();
test = (SkypeTextView ) inflate.inflate(R.layout.compound_text_view,
null);
setContentView(test);
}
PS: i forgot. You should add some underline format for your textview in order to make user notice it clickable

Let a EditText change its background based on its state(Editable or Frozen). Set a background selector that does this.
Use this selector xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_focused="true" android:drawable="#android:drawable/edit_text"/>
<item android:drawable="#android:drawable/screen_background_light_transparent"/>
</selector>

Like I said on thursday... Yul was pretty close but not quite close. He did have a general same idea but (theoretically) rushed into code too early ;)
The TextBoxOnDemand code supplied below is production-ready. The idea is similar to what I wanted to avoid in the OP and what Yul suggested, but with optimal implementation (using a ViewSwitcher instead of a RelativeLayout for instance)
I gathered the resources needed for this in the following articles:
Creating custom view from xml
Declaring a custom android UI element using XML
Defining custom attrs
How to pass custom component parameters in java and xml
http://kevindion.com/2011/01/custom-xml-attributes-for-android-widgets/
and decided to post them here because the official Google "training" docs are useless and are either obsolete (deprecated) or do not cover what I needed. I hope you don't mind me claiming my own bounty, but this is the solution I wanted (and expected, ergo the bounty).
I guess the code will have to do ;)
TextBoxOnDemand.java:
package com.skype.widget;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.TypedArray;
import android.text.SpannableString;
import android.text.style.UnderlineSpan;
import android.text.util.Linkify;
import android.util.AttributeSet;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnFocusChangeListener;
import android.view.View.OnHoverListener;
import android.view.View.OnLongClickListener;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
import android.widget.ViewSwitcher;
import com.skype.ref.R;
import com.skype.ref.RemoteKeys;
public class TextBoxOnDemand extends ViewSwitcher implements OnClickListener, OnLongClickListener, OnFocusChangeListener, OnHoverListener,
OnEditorActionListener
{
public static final String LOGTAG = "TextBoxOnDemand";
private View btmGuard;
private ImageButton cancel, accept;
private EditText editor;
private RelativeLayout editorLayout;
private TextView face;
private String hint = new String();
private boolean inEditMode = false; //normally this is in textview mode
private boolean inputReady = false;
private String ourData = new String();
private String prefillData = new String();
private String tag = new String(); //usually tag is empty.
private View topGuard;
private int autoLinkMask;// = Linkify.EMAIL_ADDRESSES; //Linkify.ALL;
private ColorStateList textColor, hintColor = null;
public TextBoxOnDemand(Context context)
{
super(context);
build(context);
setEditable(false); //init
}
public TextBoxOnDemand(Context context, AttributeSet attrs)
{
super(context, attrs);
build(context);
init(context, attrs);
setEditable(false); //init
}
public String getPrefillData()
{
return prefillData;
}
public String getTag()
{
return tag;
}
public String getText()
{
Log.d(LOGTAG, "getText() returning '" + ourData + "'");
return ourData;
}
public boolean hasPrefillData()
{
return prefillData.isEmpty();
}
public boolean isEditable()
{
Log.d(LOGTAG, "isEditable() returning " + inEditMode);
return inEditMode;
}
#Override
public void onClick(View v)
{
Log.d(LOGTAG, "onClick(" + v + ")");
if (inEditMode)
{
if (v.equals(accept))
{
if (editor.getEditableText().length() == 0 || editor.getEditableText().length() > 5)
ourData = editor.getEditableText().toString();
setEditable(false);
} else if (v.equals(cancel))
{
setEditable(false);
}
}
}
#Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event)
{
// Log.d(LOGTAG, "onEditorAction(" + v + ", " + actionId + ", " + event + ") fired!");
Log.d(LOGTAG, "onEditorAction() fired, inputReady = " + inputReady);
if (editor.getEditableText().length() > 0 && editor.getEditableText().length() < (prefillData.length() + 2)) return true; //the user needs to enter something
if (inputReady && (event.getKeyCode() == RemoteKeys.ENTER.keycode() || event.getKeyCode() == KeyEvent.KEYCODE_ENTER)) //always is
{
if (editor.getEditableText().length() > prefillData.length() || editor.getEditableText().length() == 0)
ourData = editor.getEditableText().toString();
setEditable(false);
return false;
}
if ((editor.getEditableText().toString().compareToIgnoreCase(ourData) == 0 || editor.getEditableText().toString()
.compareToIgnoreCase(prefillData) == 0)
&& !inputReady) //means we didn't just keep on holding enter
return true;
else
inputReady = true;
return true;
}
#Override
public void onFocusChange(View v, boolean hasFocus)
{
Log.d(LOGTAG, "onFocusChange(" + v + ", " + hasFocus + ")\tinEditMode = " + inEditMode);
if (inEditMode)
{
if (hasFocus && (v.equals(topGuard) || v.equals(btmGuard)))
{
setEditable(false);
requestFocus();
}
if (hasFocus && (v.equals(editor) || v.equals(accept) || v.equals(cancel)))
{
//do nothing, you should be able to browse freely here
if (ourData.isEmpty() && editor.getEditableText().length() < prefillData.length())
{
Log.d(LOGTAG, "adding prefill, before = " + editor.getEditableText());
editor.setText("");
editor.append(prefillData);
Log.d(LOGTAG, "now is = " + editor.getEditableText());
}
}
} else
{
String text = (ourData.isEmpty()) ? hint : ourData;
ColorStateList color;
if (hintColor != null && ourData.isEmpty())
color = hintColor;
else
color = textColor;
face.setTextColor(color);
if (hasFocus)
{
SpannableString ss = new SpannableString(text);
ss.setSpan(new UnderlineSpan(), 0, text.length(), 0);
face.setText(ss);
} else
face.setText(text);
}
}
#Override
public boolean onHover(View v, MotionEvent event)
{
// Log.d(LOGTAG, "onHover()");
String text = (ourData.isEmpty()) ? hint : ourData;
ColorStateList color;
if (hintColor != null && ourData.isEmpty())
color = hintColor;
else
color = textColor;
face.setTextColor(color);
switch (event.getAction())
{
case MotionEvent.ACTION_HOVER_ENTER:
SpannableString ss = new SpannableString(text);
ss.setSpan(new UnderlineSpan(), 0, text.length(), 0);
face.setText(ss);
break;
case MotionEvent.ACTION_HOVER_EXIT:
face.setText(text);
break;
}
return true;
}
#Override
public boolean onLongClick(View v)
{
Log.d(LOGTAG, "onLongClick()\tinEditMode = " + inEditMode);
if (!inEditMode) //implies that getDisplayedChild() == 0, meaning the textview
{
setEditable(true);
return true;
} else
return false;
}
public void setEditable(boolean value)
{
Log.d(LOGTAG, "setEditable(" + value + ")");
inEditMode = value;
if (inEditMode)
{
//display the editorLayout
face.setOnLongClickListener(null);
face.setOnHoverListener(null);
face.setOnFocusChangeListener(null); //because of GC.
face.setOnClickListener(null);
face.setVisibility(View.GONE);
setDisplayedChild(1);
editorLayout.setVisibility(View.VISIBLE);
editor.setOnFocusChangeListener(this);
editor.setOnEditorActionListener(this);
cancel.setOnClickListener(this);
accept.setOnClickListener(this);
accept.setOnFocusChangeListener(this);
cancel.setOnFocusChangeListener(this);
} else
{
editor.setOnFocusChangeListener(null);
editor.setOnEditorActionListener(null);
cancel.setOnClickListener(null);
accept.setOnClickListener(null);
accept.setOnFocusChangeListener(null);
cancel.setOnFocusChangeListener(null);
editorLayout.setVisibility(View.GONE);
setDisplayedChild(0);
face.setVisibility(View.VISIBLE);
face.setOnLongClickListener(this);
face.setOnHoverListener(this);
face.setOnFocusChangeListener(this);
face.setOnClickListener(this);
face.setFocusable(true);
face.setFocusableInTouchMode(true);
}
updateViews();
}
#Override
public void setNextFocusDownId(int nextFocusDownId)
{
super.setNextFocusDownId(nextFocusDownId);
face.setNextFocusDownId(nextFocusDownId);
// editor.setNextFocusDownId(nextFocusDownId);
accept.setNextFocusDownId(nextFocusDownId);
cancel.setNextFocusDownId(nextFocusDownId);
}
#Override
public void setNextFocusForwardId(int nextFocusForwardId)
{
super.setNextFocusForwardId(nextFocusForwardId);
face.setNextFocusForwardId(nextFocusForwardId);
editor.setNextFocusForwardId(nextFocusForwardId);
}
#Override
public void setNextFocusLeftId(int nextFocusLeftId)
{
super.setNextFocusLeftId(nextFocusLeftId);
face.setNextFocusLeftId(nextFocusLeftId);
editor.setNextFocusLeftId(nextFocusLeftId);
}
#Override
public void setNextFocusRightId(int nextFocusRightId)
{
super.setNextFocusRightId(nextFocusRightId);
face.setNextFocusRightId(nextFocusRightId);
cancel.setNextFocusRightId(nextFocusRightId);
}
#Override
public void setNextFocusUpId(int nextFocusUpId)
{
super.setNextFocusUpId(nextFocusUpId);
face.setNextFocusUpId(nextFocusUpId);
// editor.setNextFocusUpId(nextFocusUpId);
accept.setNextFocusUpId(nextFocusUpId);
cancel.setNextFocusUpId(nextFocusUpId);
}
public void setPrefillData(String prefillData)
{
this.prefillData = new String(prefillData);
}
public String setTag()
{
return tag;
}
public void setText(String text)
{
Log.d(LOGTAG, "setText(" + text + ")");
ourData = text;
updateViews();
}
private void build(Context context)
{
Log.d(LOGTAG, "build()");
addView(View.inflate(context, R.layout.textboxondemand, null));
setFocusable(true);
setFocusableInTouchMode(true);
setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
setOnFocusChangeListener(this);
setOnLongClickListener(this);
face = (TextView) findViewById(R.id.TBOD_textview);
editorLayout = (RelativeLayout) findViewById(R.id.TBOD_layout);
editor = (EditText) findViewById(R.id.TBOD_edittext);
accept = (ImageButton) findViewById(R.id.TBOD_accept);
cancel = (ImageButton) findViewById(R.id.TBOD_cancel);
topGuard = (View) findViewById(R.id.TBOD_top);
btmGuard = (View) findViewById(R.id.TBOD_bottom);
face.setFocusable(true);
face.setFocusableInTouchMode(true);
face.setOnLongClickListener(this);
face.setOnHoverListener(this);
face.setOnFocusChangeListener(this);
face.setOnClickListener(this);
editor.setOnFocusChangeListener(this);
editor.setOnEditorActionListener(this);
editor.setHint(hint);
editor.setFocusable(true);
editor.setFocusableInTouchMode(true);
accept.setOnClickListener(this);
accept.setOnFocusChangeListener(this);
accept.setFocusable(true);
cancel.setFocusable(true);
cancel.setOnFocusChangeListener(this);
cancel.setOnClickListener(this);
topGuard.setFocusable(true);
topGuard.setOnFocusChangeListener(this);
btmGuard.setFocusable(true);
btmGuard.setOnFocusChangeListener(this);
editor.setNextFocusRightId(R.id.TBOD_accept);
editor.setNextFocusDownId(R.id.TBOD_bottom);
editor.setNextFocusUpId(R.id.TBOD_top);
accept.setNextFocusLeftId(R.id.TBOD_edittext);
accept.setNextFocusRightId(R.id.TBOD_cancel);
cancel.setNextFocusLeftId(R.id.TBOD_accept);
}
private void init(Context context, AttributeSet attrs)
{
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.TextBoxOnDemand);
//Use a
Log.d(LOGTAG, "init()");
if (a == null) Log.d(LOGTAG, "Did you include 'xmlns:app=\"http://schemas.android.com/apk/res-auto\"' in your root layout?");
final int N = a.getIndexCount();
for (int i = 0; i < N; ++i)
{
int attr = a.getIndex(i);
switch (attr)
{
case R.styleable.TextBoxOnDemand_android_hint:
hint = new String(a.getString(attr));
editor.setHint(a.getString(attr));
break;
case R.styleable.TextBoxOnDemand_android_text:
ourData = new String(a.getString(attr));
break;
case R.styleable.TextBoxOnDemand_android_inputType:
int inputType = a.getInt(attr, -1);
if (inputType != -1) editor.setInputType(inputType);
break;
case R.styleable.TextBoxOnDemand_android_textColor:
textColor = a.getColorStateList(attr);
face.setTextColor(textColor);
break;
case R.styleable.TextBoxOnDemand_android_linksClickable:
face.setLinksClickable(a.getBoolean(attr, true));
break;
case R.styleable.TextBoxOnDemand_android_textColorHint:
hintColor = a.getColorStateList(attr);
break;
case R.styleable.TextBoxOnDemand_android_autoLink:
autoLinkMask = a.getInt(attr, 0);
face.setAutoLinkMask(autoLinkMask);
break;
default:
Log.d(LOGTAG, "Skipping attribute " + attr);
}
}
//Don't forget this
a.recycle();
}
private void updateViews()
{
Log.d(LOGTAG, "updateViews()");
// if (getDisplayedChild() == 0) //first child - textview
if (!inEditMode) //first child - textview
{
if (ourData.isEmpty())
{
if (hintColor != null) face.setTextColor(hintColor);
face.setText(hint);
} else
{
face.setTextColor(textColor);
face.setText(ourData);
}
face.setFocusable(true);
face.setFocusableInTouchMode(true);
face.setAutoLinkMask(autoLinkMask);
} else
{ //second child - edittext
editor.setFocusable(true);
editor.setFocusableInTouchMode(true);
if (ourData.startsWith(prefillData) || ourData.length() >= prefillData.length())
editor.setText("");
else
editor.setText(prefillData);
editor.append(ourData);
inputReady = false;
editor.requestFocus();
}
}
public void setAutoLinkMask(LinkifyEnum linkifyEnumConstant)
{
switch (linkifyEnumConstant)
{
case ALL:
autoLinkMask = Linkify.ALL;
break;
case EMAIL_ADDRESSES:
autoLinkMask = Linkify.EMAIL_ADDRESSES;
break;
case MAP_ADDRESSES:
autoLinkMask = Linkify.MAP_ADDRESSES;
break;
case PHONE_NUMBERS:
autoLinkMask = Linkify.PHONE_NUMBERS;
break;
case WEB_URLS:
autoLinkMask = Linkify.WEB_URLS;
break;
case NONE:
default:
autoLinkMask = 0;
break;
}
//set it now
face.setAutoLinkMask(autoLinkMask);
}
public enum LinkifyEnum
{
ALL, EMAIL_ADDRESSES, MAP_ADDRESSES, PHONE_NUMBERS, WEB_URLS, NONE
};
}
I'm still working out some focus-related issues but this works as intended. When I use onFocuslistener 1, you can't focus from one TextBox to the other; when the textbox itself is focusable, I can focus from one to the other just fine, but I cannot inter-focus thru children and thus can't focus on the edittext to type.
the XML file:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/TBOD_textview"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:autoLink="email"
android:focusable="true"
android:focusableInTouchMode="true"
android:linksClickable="true"
android:textAppearance="?android:attr/textAppearanceMedium" />
<RelativeLayout
android:id="#+id/TBOD_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<EditText
android:id="#+id/TBOD_edittext"
android:layout_width="300dp"
android:layout_height="30dp"
android:layout_below="#+id/TBOD_textview"
android:focusable="true"
android:focusableInTouchMode="true"
android:imeOptions="actionDone"
android:inputType="none"
android:maxLines="1"
android:padding="2dp"
android:singleLine="true"
android:textColor="#android:color/black"
android:textSize="14dp" />
<ImageButton
android:id="#+id/TBOD_accept"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/TBOD_edittext"
android:layout_marginLeft="15dp"
android:layout_toRightOf="#+id/TBOD_edittext"
android:background="#drawable/button_accept_selector" />
<ImageButton
android:id="#+id/TBOD_cancel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/TBOD_edittext"
android:layout_marginLeft="5dp"
android:layout_toRightOf="#+id/TBOD_accept"
android:background="#drawable/button_cancel_selector" />
<View
android:id="#+id/TBOD_top"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_alignParentTop="true"
android:background="#android:color/transparent" />
<View
android:id="#+id/TBOD_bottom"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_alignParentBottom="true"
android:background="#android:color/transparent" />
</RelativeLayout>
</RelativeLayout>
and finally, the attrs.xml file:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="TextBoxOnDemand">
<attr name="android:text" />
<attr name="android:inputType" />
<attr name="android:hint" />
<attr name="android:textColor" />
<attr name="android:textColorHint" />
<attr name="android:linksClickable" />
<attr name="android:autoLink" />
</declare-styleable>
</resources>
This is how I used it in my main xml (after including the required namespace add):
<com.shark.widget.TextBoxOnDemand
android:id="#+id/profile_email2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/profile_skypename"
android:layout_below="#+id/profile_email_placeholder"
android:hint="#string/add_email"
android:inputType="textEmailAddress"
android:textColor="#android:color/white"
android:textColorHint="#color/skype_blue" />
EDIT: I've debugged the focus issues. It turns out that giving focus to children is difficult unless you call
setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
Which kinda remedies the issue but still doesn't solve it. After some while of playing around with the onFocusChange() listener still trying to get the perfect behaviour, I threw in the towel and put in added two focus guards. I realized I cannot track the loss of focus only on my container (due to it never receiving focus) but I might as well track the idea of wanting to move away from the edit field... So i went the dirty route and added two invisible bar-like views to sandwitch the edittext in between. Once they got the focus, I could hide the component and ensure they transition properly.
And there it is, now it works as it should. Thanks to all who participated.
EDIT3: final polished version, i dumped the custom tags because they simply don't work reliably enough. Lesson to be learned: if there is an android tag for something, don't bother cloning it.