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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.

Understanding why onClick() is Called Even After onDispatchTouchEvent() Returns True

Lets say, in an Android app, we want to have the ability to temporarily and reliably ignore all user touches at any moment.
From the research I have done on stack-overflow as well as here, here, and here, the agreed-upon solution seems to be something like this:
(Code of MainActivity.java):
// returning true should mean touches are ignored/blocked
#Override
public boolean dispatchTouchEvent(MotionEvent pEvent) {
if (disableTouches) {
return true;
} else {
return super.dispatchTouchEvent(pEvent);
}
}
However, when we introduce the Android Monkey Exerciser Tool and send touch events to the app at a rapid rate, it becomes apparent that pigs begin to fly at the quantum level -- we can get calls to onClick() even after/during times where "blockTouches" has been set to true.
MY QUESTION IS: Why is that? -- Is this a normal Android behavior, or did I make a mistake in my code? :)
Note: I have already ruled out the possibility of onClick() being called by user input other than touches (and therefore being uncontrolled by the onDispatchTouchEvent() method)... by adding "—-pct-touch 100" to the monkey command.
Here is the code I am using for this test:
MainActivity:
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
View rootView; // turns black when "touch rejection" is in progress
View allowedButton;
View notAllowedButton;
// Used to decide whether to process touch events.
// Set true temporarily when notAllowedButton is clicked.
boolean touchRejectionAnimationInProgress = false;
int errorCount = 0; // counting "unexpected/impossible" click calls
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rootView = findViewById(R.id.rootView);
allowedButton = findViewById(R.id.allowedButton);
notAllowedButton = findViewById(R.id.notAllowedButton);
allowedButton.setOnClickListener(this);
notAllowedButton.setOnClickListener(this);
allowedButton.setBackgroundColor(Color.GREEN);
notAllowedButton.setBackgroundColor(Color.RED);
}
// returning true should mean touches are ignored/blocked
#Override
public boolean dispatchTouchEvent(MotionEvent pEvent) {
if (touchRejectionAnimationInProgress) {
Log.i("XXX", "touch rejected in dispatchTouchevent()");
return true;
} else {
return super.dispatchTouchEvent(pEvent);
}
}
#Override
public void onClick(View viewThatWasClicked){
Log.i("XXX", "onClick() called. View clicked: " + viewThatWasClicked.getTag());
//checking for unexpected/"impossible"(?) calls to this method
if (touchRejectionAnimationInProgress) {
Log.i("XXX!", "IMPOSSIBLE(?) call to onClick() detected.");
errorCount ++;
Log.i("XXX!", "Number of unexpected clicks: " + errorCount);
return;
} // else proceed...
if (viewThatWasClicked == allowedButton) {
// Irrelevant
} else if (viewThatWasClicked == notAllowedButton) {
// user did something that is not allowed.
touchRejectionAnimation();
}
}
// When the user clicks on something "illegal,"
// all user input is ignored temporarily for 200 ms.
// (arbitrary choice of duration, but smaller is better for testing)
private void touchRejectionAnimation() {
Log.i("XXX", "touchRejectionAnimation() called.");
touchRejectionAnimationInProgress = true;
rootView.setBackgroundColor(Color.BLACK);
// for logging/debugging purposes...
final String rejectionID = (new Random().nextInt() % 9999999) + "";
Log.i("XXX", "rejection : " + rejectionID + " started.");
Thread thread = new Thread(new Runnable() {
#Override
public void run() {
try { Thread.sleep(200); } catch (Exception e) {
Log.e("XXX", "exception in touchRejection() BG thread!");
}
runOnUiThread(new Runnable() {
#Override
public void run() {
Log.i("XXX", "rejection " + rejectionID + " ending");
rootView.setBackgroundColor(Color.WHITE);
touchRejectionAnimationInProgress = false;
}
});
}
});
thread.start();
}
}
layout.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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:id="#+id/rootView"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<View
android:id="#+id/allowedButton"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginTop="32dp"
android:layout_marginBottom="32dp"
android:tag="allowedButton"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/notAllowedButton"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<View
android:id="#+id/notAllowedButton"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginTop="32dp"
android:layout_marginBottom="32dp"
android:tag="view2"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/allowedButton"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

If you don't want your onClick() to be triggered on any view click.
Following are the steps which need to take care.
Create custom viewGroup eg: MyConstraintLayout and add all child
inside it.
Override onInterceptTouchEvent(MotionEvent ev) and return it has true.
public class MyConstraintLayout extends ConstraintLayout {
private boolean mIsViewsTouchable;
public ParentView(Context context) {
super(context);
}
public ParentView(Context context, AttributeSet attrs) {
super(context, attrs);
inflate(context, R.layout.custom_view, this);
}
public ParentView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public void setViewsTouchable(boolean isViewTouchable) {
mIsViewsTouchable = isViewTouchable;
}
#Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
return mIsViewsTouchable;
}
}
Note: Use setViewsTouchable() method as per your requirement, If you pass the parameter as true all views are not clickable if false your views will be clickable.

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>

How to change the src of imageview on re-click

I have one ImageView with src, and I want it to change its src onClick. That's easy, but I want to change it's src back to normal when user clicks the imageview again. How can I make it in java?
EDIT:
I already tried this:
public void act1 (View view) {
ImageView ic1 = (ImageView) findViewById(R.id.id1);
Drawable oldBg = ic1.getBackground();
String oldBgStr = ic1.getBackground().toString();
Drawable ic1light = this.getResources().getDrawable(R.drawable.ic1);
Drawable ic1dark = this.getResources().getDrawable(R.drawable.ic1dark);
ic1.setTag(R.drawable.ic1);
if (oldBg == ic1light){
ic1.setBackground(ic1dark);
}
if (oldBg == ic1dark) {
ic1.setBackground(ic1light);
}
ic1.setImageResource(R.drawable.ic1dark);
}
Here is XML of ImageView and Layout it's in:
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_gravity="center"
android:layout_marginTop="5dp"
android:background="#color/red"
>
<ImageView
android:id="#+id/id1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="act1"
android:background="#drawable/ic1"
android:adjustViewBounds="true"/>

Simply set a boolean and toggle it whenever the user clicks on the image. Check the boolean each time and display the appropriate image.
private boolean mClicked = false;
public void act1 (View view) {
if(mClicked) {
ic1.setBackground(ic1dark);
}
else {
ic1.setBackground(ic1light);
}
mClicked = !mClicked;
}

Use a boolean to switch between states of current image set like so:
private boolean currentState = false;
public void act1 (View view) {
ImageView ic1 = (ImageView) findViewById(R.id.id1);
// set current src
Drawable oldBg = ic1.getBackground();
String oldBgStr = ic1.getBackground().toString();
Drawable ic1light = this.getResources().getDrawable(R.drawable.ic1);
Drawable ic1dark = this.getResources().getDrawable(R.drawable.ic1dark);
ic1.setTag(R.drawable.ic1);
// when this is called from click event of anything else
if(currentState){
ic1.setBackground(ic1light);
currentState = true;
return;
}
if(!currentState){
ic1.setBackground(ic1dark);
currentState = false;
return;
}
}

Android viewPager out of memory using local html

I'm developing an Android app using Xamarin studio, but this is not important.
I use the pageViewer to upload the fragment (12 more or less). To the one display fragment i use a webView to display a local html page and with a swipe to the left, the webview content change to the next one.
So, at the fifth frgament memory problems started even if i used different tasks in my code.
My question is: Is there a way to 'detach' the fragment when i'm not displaying them? Can they not remain into my memory?
Thanks for all
This is my code, N.B: Java answers are accepeted as well
protected override void OnCreate (Bundle bundle)
{
base.OnCreate (bundle);
SetContentView (Resource.Layout.BookView);
_loader = ProgressDialog.Show (this, "Loading...", "Please wait...", true);
//return chapters count
chapters = 12 //example
//var dp = (int)Resources.DisplayMetrics.Density;
_layout = FindViewById<DrawerLayout> (Resource.Id.drawer_layout);
_view = FindViewById<ViewPager>(Resource.Id.bView);
_view.SetBackgroundColor (Color.White);
_currentAdapter = new AwesomeFragmentAdapter (SupportFragmentManager, path, name, chapters, this, _view);
_view.Adapter = _currentAdapter;
_view.OffscreenPageLimit = chapters;
List<int> positions = new List<int> ();
_view.PageSelected += (object sender, ViewPager.PageSelectedEventArgs e) => {
//get details
var page_load = new Task (() => {
//return an object with the chapter details
_chap = object;
});
page_load.Start();
//find the webview
_web = (WebView)_view.FindViewWithTag(300 + e.Position);
WebSettings setting = _web.Settings;
setting.CacheMode = CacheModes.Default;
setting.JavaScriptEnabled = true;
setting.BuiltInZoomControls = true;
setting.DisplayZoomControls = false;
setting.PluginsEnabled = true;
setting.SetPluginState(WebSettings.PluginState.On);
//setting.JavaScriptCanOpenWindowsAutomatically = true;
if (positions.Contains(e.Position)) {
_web.ClearCache(true);
_web.ClearView();
}
//Start when the scroll is finished
_view.PageScrollStateChanged += (object sendero, ViewPager.PageScrollStateChangedEventArgs ex) => {
if (ex.State == 0 ) {
if (positions.Contains(e.Position)) {
//_web.Reload(); --> doesn't work
//Doesn't reload the .js animations
_web.LoadUrl ("file://" + path + "/" + _chap.Name);
} else {
_web.LoadUrl ("file://" + path + "/" + _chap.Name);
positions.Add(e.Position);
}
}
};
};
}
public class BWebClient : WebViewClient
{
int _position;
string _path;
Activity _parent;
ViewPager _pager;
string _chapName;
public BWebClient (int position, string Path, Activity Parent, ViewPager Pager, string ChapName){
_position = position;
_parent = Parent;
_path = Path;
_pager = Pager;
_chapName = ChapName;
}
public override void OnPageFinished (WebView view, string url)
{
base.OnPageFinished (view, url);
view.ScrollTo (0, _position);
}
public override bool ShouldOverrideUrlLoading (WebView view, string url)
{
if (url.StartsWith ("navigate")) {
string destination = url.Substring (url.IndexOf ("navigate://") + "navigate://".Length);
int DestinationChapter = Int32.Parse (destination.Substring (0, destination.IndexOf("_")));
int l = destination.IndexOf("_") + 1;
int b = destination.Length - l;
int DestinationPage = Int32.Parse (destination.Substring (l,b));
if (DestinationPage == 0) {
_pager.SetCurrentItem(DestinationChapter ,true);
WebView _web = (WebView)_pager.FindViewWithTag(300 + DestinationChapter);
_web.LoadUrl ("file://" + _path + "/" + _chapName);
}
} else if (url.StartsWith ("pdf")) {
string file_path = System.IO.Path.Combine (_path, url.Substring (url.IndexOf ("pdf://") + "pdf://".Length));
Android.Net.Uri pdfFile = Android.Net.Uri.FromFile (new Java.IO.File (file_path));
Intent pdfIntent = new Intent (Intent.ActionView);
pdfIntent.SetDataAndType (pdfFile, "application/pdf");
_parent.StartActivity (pdfIntent);
}
return true;
}
}
public class AwesomeFragmentAdapter : FragmentPagerAdapter
{
string _path;
string _filename;
int _chapters;
Activity _parent;
FileUtilities _fUtils;
ViewPager _pager;
public AwesomeFragmentAdapter (Android.Support.V4.App.FragmentManager fm,
string path,
string filename,
int chapters,
Activity parent,
FileUtilities FUtils,
ViewPager Pagers): base(fm)
{
_path = path;
_filename = filename;
_chapters = chapters;
_parent = parent;
_fUtils = FUtils;
_pager = Pagers;
}
public override int Count
{
/* --- return chapter count --- */
get { return _chapters;}
}
public override Android.Support.V4.App.Fragment GetItem(int _position)
{
/* --- get specific item --- */
return new AwesomeFragment (_path, _filename, _position, _parent, _fUtils, _pager);
}
}
public class AwesomeFragment : Android.Support.V4.App.Fragment
{
string _path;
WebView web_view;
string _filename;
int _position;
Activity _parent;
BanjiChapter _chap;
FileUtilities _fUtils;
ViewPager _pager;
public AwesomeFragment () {}
public AwesomeFragment (string path,
string filename,
int position,
Activity parent,
FileUtilities FUtils,
ViewPager Pager)
{
_path = path;
_filename = filename;
_position = position;
_parent = parent;
_fUtils = FUtils;
_pager = Pager;
}
public override View OnCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
/* --- Create the view --- */
var view = inflater.Inflate (Resource.Layout.BookWebView, container, false);
//return the chapter
_chap = _fUtils.ReturnChapterDetails(_filename, _position);
web_view = view.FindViewById<WebView> (Resource.Id.webview);
web_view.SetWebViewClient(new BanjiWebClient(_position,_path,_parent, _pager, _chap.Name ));
web_view.SetBackgroundColor(Color.Transparent);
web_view.Settings.JavaScriptEnabled = true;
web_view.Tag = 300 + _position;
switch(Resources.DisplayMetrics.DensityDpi){
case Android.Util.DisplayMetricsDensity.Medium:
{
web_view.SetLayerType (LayerType.Software, null);
break;
}
case Android.Util.DisplayMetricsDensity.High:
{
web_view.SetLayerType (LayerType.Hardware, null);
break;
}
case Android.Util.DisplayMetricsDensity.Xhigh:
{
web_view.SetLayerType (LayerType.Hardware, null);
break;
}
}
if (_chap.Background == null) {
view.SetBackgroundColor (Color.White);
} else {
view.SetBackgroundDrawable (new BitmapDrawable (BitmapFactory.DecodeByteArray (_chap.Background, 0, _chap.Background.Length)));
}
if (_position == 0) {
web_view.LoadUrl ("file://" + _path + "/" + _chap.Name);
}
return view;
}
public BChapter GetCurrentBChapter()
{
return _chap;
}
}
EDIT:
BookView.axml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffececec">
<!-- The main content view -->
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/mainView">
<android.support.v4.view.ViewPager
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/bookView" />
<ImageButton
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_gravity="left|center"
android:background="#null"
android:id="#+id/menuButton"
/>
</FrameLayout>
<!-- The navigation drawer -->
<LinearLayout
android:id="#+id/left_menu"
android:layout_width="250dp"
android:layout_height="match_parent"
android:choiceMode="singleChoice"
android:layout_gravity="start"
android:divider="#android:color/transparent"
android:dividerHeight="0dp"
android:background="#111">
<Button
android:id="#+id/backStep"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
style="#style/button_text"
android:background="#ff000000"
android:fitsSystemWindows="false" />
<Space
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/screllArea">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/ThumbLayout" />
</ScrollView>
</LinearLayout>
</android.support.v4.widget.DrawerLayout>
BookWebView
<?xml version="1.0" encoding="utf-8"?>
<WebView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/webview"
android:layout_width="match_parent"
android:layout_height="match_parent" />

Use a FragmentStatePagerAdapter instead; it is designed to minimise memory overhead by possibly destroying the fragment when it is not visible, saving only the state information of that fragment.
From the developers docs:
This version of the pager is more useful when there are a large number of pages, working more like a list view. When pages are not visible to the user, their entire fragment may be destroyed, only keeping the saved state of that fragment. This allows the pager to hold on to much less memory associated with each visited page as compared to FragmentPagerAdapter at the cost of potentially more overhead when switching between pages.
See here for documentation.