I create textView in scrollView. Every time i setText the textView, the text not updating, but when i open the keyboard then close it, the text updated..
after googling, i got the solution is call textView.invalidate() and textView.requestLayout(). But i am currious why it's not updating without call invalidate and requestLayout? Is scrollView has somethis 'special' so i need to call invalidate and requestLayout?
here is the code
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:context="com.zihadrizkyef.belajarinternalstorage.MainActivity"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="8"
android:orientation="vertical">
<EditText
android:id="#+id/etWrite"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="5"
android:gravity="top"
android:hint="write text here"/>
<View android:id="#+id/separator1"
android:layout_width="match_parent"
android:layout_height="1px"
android:layout_marginTop="20dp"
android:layout_marginBottom="20dp"
android:background="#aaa"/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
<TextView
android:id="#+id/tvRead"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center"
android:hint="(no text)"/>
</ScrollView>
<View android:id="#+id/separator2"
android:layout_width="match_parent"
android:layout_height="1px"
android:layout_marginTop="20dp"
android:layout_marginBottom="20dp"
android:background="#aaa"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="horizontal"
android:layout_weight="2"
android:gravity="center">
<Button
android:id="#+id/btnSave"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="10dp"
android:onClick="onClick"
android:text="save"/>
<Button
android:id="#+id/btnLoad"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:onClick="onClick"
android:text="load"/>
</LinearLayout>
</LinearLayout>
MainActivity.java
package com.zihadrizkyef.belajarinternalstorage;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class MainActivity extends AppCompatActivity {
private final String FNAME = "mydata";
EditText etWrite;
TextView tvRead;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
etWrite = (EditText)findViewById(R.id.etWrite);
tvRead = (TextView)findViewById(R.id.tvRead);
}
public void onClick(View v) {
switch(v.getId()) {
case R.id.btnSave:
String data = etWrite.getText().toString();
try {
FileOutputStream fOut = openFileOutput(FNAME, MODE_PRIVATE);
fOut.write(data.getBytes());
fOut.close();
Toast.makeText(MainActivity.this, "File saved", Toast.LENGTH_SHORT).show();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
break;
case R.id.btnLoad:
int cRead;
String read="";
try {
FileInputStream fIn = openFileInput(FNAME);
while((cRead=fIn.read())!=-1) {
read += Character.toString((char)cRead);
}
tvRead.setText(read);
tvRead.invalidate();
tvRead.requestLayout();
Toast.makeText(MainActivity.this, "File loaded", Toast.LENGTH_SHORT).show();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
}
github : https://github.com/zihadrizkyef/FileWriteRead_InternalStorage
You can try updating the value using AsyncTask. As the method onPostExecute() runs in UI thread, it can make any kind of UI updates dynamically. Refer to this for more info:https://developer.android.com/reference/android/os/AsyncTask.html
you've set ScrollView's height and TextView's height to "0" and don't have any text set for TextView,so you have to invalidate your view in order to measure its layout parameters again.
you can use this link:
Making TextView scrollable on Android
Its obvious,
Whenever you change the data for a control it doesn't get reflected in the view, unless the control or its parent control or view is invalidated.
Its also mentioned in documentation of TextView
https://developer.android.com/reference/android/widget/TextView.html#setText(char[], int, int)
Related
when trying to add a fragment to my class i keep getting this error im not sure how to fix this im pretty sure im adding the fragment right but the error keeps appearing and crashing my app when i try to run it any idea how to fix it?
XML File
<?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/layout_default"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.ericvuu.whatsfordinner.RecipeActivity">
<fragment
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:name="com.example.ericvuu.whatsfordinner.RecipeActivity"/>
<Button
android:id="#+id/recipe1"
android:layout_width="0dp"
android:layout_height="50dp"
android:layout_marginBottom="484dp"
android:background="#android:color/darker_gray"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
tools:layout_constraintBottom_creator="1"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
app:layout_constraintHorizontal_bias="0.0" />
<Button
android:id="#+id/recipe2"
android:layout_width="0dp"
android:layout_height="50dp"
android:background="#color/colorPrimaryDark"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/recipe1"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1" />
<Button
android:id="#+id/recipe3"
android:layout_width="0dp"
android:layout_height="50dp"
android:layout_marginTop="-11dp"
android:background="#android:color/darker_gray"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/recipe2"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1"
tools:layout_constraintTop_creator="1" />
</android.support.constraint.ConstraintLayout>
Java file
package com.example.ericvuu.whatsfordinner;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
public class RecipeActivity extends AppCompatActivity {
public Button recipeText;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recipe);
recipeText = (Button) findViewById(R.id.recipe1);
try {
String message;
FileInputStream fis = openFileInput("RecipeText");
InputStreamReader isr = new InputStreamReader(fis);
BufferedReader br = new BufferedReader(isr);
StringBuffer sb = new StringBuffer();
while ((message = br.readLine()) != null) {
sb.append(message + "\n");
}
recipeText.setText(sb.toString());
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public void onClick(View v) {
}
}
and the landscape xml file im triyng to put the fragment in
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="1">
<fragment
android:id="#+id/layout_default"
android:name="com.example.ericvuu.whatsfordinner.RecipeActivity"
android:layout_width="214dp"
android:layout_height="match_parent"
android:layout_weight="0.08" />
</LinearLayout>
You are adding fragment in xml for vertical and landscape mode. So once when you launch your app it will crash because you already have added fragment in your activity. I would recommend better try adding fragment using container.
ex:-
put this line in your xml
<LinearLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
instead of adding direct fragment into xml.
and try adding your fragment programmatically.
FragmentTransaction fragmentTransaction =
getFragmentManager().beginTransaction();
.......
......
And also check RecipeActivity is an activity not fragment. this code works only with fragment
As #MikeM. tell in the comment, you can't use an Activity for android:name attribute inside fragment tag.
The Fragments documentation says:
The android:name attribute in the specifies the Fragment
class to instantiate in the layout.
So, you can't use the following:
<fragment
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:name="com.example.ericvuu.whatsfordinner.RecipeActivity"/>
You need to convert your RecipeActivity activity to Fragment.
okay so I am trying to display album art for songs in my app . I am trying to do it by using Mediametadataretriever. But I am getting an IllegalStateException in line metaRetriver.setDataSource(Environment.getExternalStorageDirectory().getPath() );
I understand it might be because of using an invalid path but I can't figure out what is the valid path then . I am really newbie to android app development. Can anyone help me with it ?
PlayListActivity.java :
package com.example.dell_1.myapp3;
import android.app.Activity;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.media.MediaMetadataRetriever;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import java.io.IOException;
public class PlayListActivity extends Activity {
private String[] mAudioPath;
private MediaPlayer mMediaPlayer;
private String[] mMusicList;
MediaMetadataRetriever metaRetriver;
byte[] art;
ImageView album_art;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_play_list);
mMediaPlayer = new MediaPlayer();
ListView mListView = (ListView) findViewById(R.id.list);
mMusicList = getAudioList();
ArrayAdapter<String> mAdapter = new ArrayAdapter<>(this,
android.R.layout.simple_list_item_1, mMusicList);
mListView.setAdapter(mAdapter);
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View view, int arg2,
long arg3) {
try {
playSong(mAudioPath[arg2]);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
private String[] getAudioList() {
final Cursor mCursor = getContentResolver().query(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
new String[]{MediaStore.Audio.Media.DISPLAY_NAME, MediaStore.Audio.Media.DATA}, null, null,
"LOWER(" + MediaStore.Audio.Media.TITLE + ") ASC");
int count = mCursor.getCount();
String[] songs = new String[count];
mAudioPath = new String[count];
int i = 0;
if (mCursor.moveToFirst()) {
do {
songs[i] = mCursor.getString(mCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME));
mAudioPath[i] = mCursor.getString(mCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));
i++;
} while (mCursor.moveToNext());
}
mCursor.close();
return songs;
}
private void playSong(String path) throws IllegalArgumentException,
IllegalStateException, IOException {
setContentView(R.layout.activity_android_building_music_player);
Log.d("ringtone", "playSong :: " + path);
mMediaPlayer.reset();
mMediaPlayer.setDataSource(path);
//mMediaPlayer.setLooping(true);
mMediaPlayer.prepare();
mMediaPlayer.start();
acv();
}
public void acv() {
getInit();
metaRetriver = new MediaMetadataRetriever();
metaRetriver.setDataSource(Environment.getExternalStorageDirectory().getPath() );
try {
art = metaRetriver.getEmbeddedPicture();
Bitmap songImage = BitmapFactory.decodeByteArray(art, 0, art.length);
album_art.setImageBitmap(songImage);
} catch (Exception e) {
album_art.setBackgroundColor(Color.GRAY);
}
}
public void getInit() {
album_art = (ImageView) findViewById(R.id.coverart);
}
}
activity_play_list.xml :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<ListView
android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:divider="#242424"
android:dividerHeight="1dp"
android:listSelector="#drawable/list_selector" />
</LinearLayout>
activity_android_building_music_player.xml :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<LinearLayout
android:id="#+id/player_header_bg"
android:layout_width="fill_parent"
android:layout_height="60dip"
android:layout_alignParentTop="true"
android:background="#layout/bg_player_header"
android:paddingLeft="5dp"
android:paddingRight="5dp">
<TextView
android:id="#+id/songTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_weight="1"
android:paddingLeft="50dp"
android:text="The Good"
android:textColor="#04b3d2"
android:textSize="16dp"
android:textStyle="bold" />
<ImageButton
android:id="#+id/btnPlaylist"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:background="#null"
android:src="#drawable/btn_playlist" />
</LinearLayout>
<LinearLayout
android:id="#+id/songThumbnail"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="#+id/player_header_bg"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:gravity="center"
android:paddingBottom="10dp"
android:paddingTop="10dp">
<ImageView
android:id="#+id/coverart"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</LinearLayout>
<LinearLayout
android:id="#+id/player_footer_bg"
android:layout_width="fill_parent"
android:layout_height="100dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:background="#layout/bg_player_footer"
android:gravity="center">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:weightSum="1">
<RelativeLayout
android:layout_width="300dp"
android:layout_height="match_parent">
<ImageButton
android:id="#+id/btnPrevious"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="2.40"
android:layout_alignParentLeft="true"
android:paddingLeft="10dp"
android:background="#null"
android:src="#drawable/btn_previous" />
<ImageButton
android:id="#+id/btnPlay1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:background="#null"
android:src="#drawable/btn_play"
android:onClick="buttonAction1"/>
<ImageButton
android:id="#+id/btnNext"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="250dp"
android:background="#null"
android:src="#drawable/btn_next" />
</RelativeLayout>
</LinearLayout>
</LinearLayout>
<SeekBar
android:id="#+id/songProgressBar"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/player_footer_bg"
android:layout_alignLeft="#+id/timerDisplay"
android:layout_alignStart="#+id/timerDisplay"
android:layout_marginBottom="10dp"
android:paddingLeft="6dp"
android:paddingRight="6dp"
android:progressDrawable="#drawable/seekbar_progress"
android:thumb="#drawable/download8" />
<LinearLayout
android:id="#+id/timerDisplay"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="#id/songProgressBar"
android:layout_marginBottom="10dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp">
<TextView
android:id="#+id/songCurrentDurationLabel"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="left"
android:textColor="#eeeeee"
android:textStyle="bold" />
<TextView
android:id="#+id/songTotalDurationLabel"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="right"
android:textColor="#04cbde"
android:textStyle="bold" />
</LinearLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="#id/timerDisplay"
android:gravity="center">
<ImageButton
android:id="#+id/btnRepeat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="5dp"
android:background="#null"
android:src="#drawable/btn_repeat" />
<ImageButton
android:id="#+id/btnShuffle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:background="#null"
android:src="#drawable/btn_shuffle" />
</LinearLayout>
</RelativeLayout>
Actually you are playing some some in one file path and you are trying to fetch the art from external storage file path, so you should send the path to that method,
private void playSong(String path) throws IllegalArgumentException,
IllegalStateException, IOException {
setContentView(R.layout.activity_android_building_music_player);
Log.d("ringtone", "playSong :: " + path);
mMediaPlayer.reset();
mMediaPlayer.setDataSource(path);
//mMediaPlayer.setLooping(true);
mMediaPlayer.prepare();
mMediaPlayer.start();
acv(path);
}
public void acv(String path) {
getInit();
metaRetriver = new MediaMetadataRetriever();
metaRetriver.setDataSource(path);
try {
art = metaRetriver.getEmbeddedPicture();
Bitmap songImage = BitmapFactory.decodeByteArray(art, 0, art.length);
album_art.setImageBitmap(songImage);
} catch (Exception e) {
album_art.setBackgroundColor(Color.GRAY);
}
}
And few suggestions,
You should not use setContentView multiple time in an activity I understand you are using 2 layouts, but in that case, you should use 2 different activity.
You playing something songs and user will not be in your app always they like to move around the application so try to use service to run the song in background
For more reference, you can get fantastic opensource app will be available in Github look into that.
Well you are trying to get a thumbnail from a specific file, but you are putting in the path of the External Storage Directory. So by using
metaRetriver.setDataSource(Environment.getExternalStorageDirectory().getPath() );
You are pointing to a folder, not a specific media file. But this:
metaRetriver.setDataSource(Environment.getExternalStorageDirectory().getPath() + "yourFileName.mp3" );
Is more in line with what you would need.
I'm a rookie to programming. I've been trying to build an app and been getting these errors as seen in the screenshot. I've tried the "Invalid Caches/Restart" but it didn't help. What am I doing wrong here?
EDIT: Sorry for earlier ignorance. I've added the code snippets.
Login.Java:
package com.example.ankit.mrestro;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class Login extends AppCompatActivity implements View.OnClickListener {
Button blogin;
EditText etUsername, etPassword;
TextView RegisterHere,Skip;
UserLocalStorage userLocalStorage;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
etUsername = (EditText) findViewById(R.id.etUserName);
etPassword = (EditText) findViewById(R.id.etPassword);
RegisterHere = (TextView) findViewById(R.id.RegisterHere);
Skip = (TextView) findViewById(R.id.Skip);
blogin = (Button) findViewById(R.id.blogin);
blogin.setOnClickListener(this);
RegisterHere.setOnClickListener(this);
Skip.setOnClickListener(this);
userLocalStorage= new UserLocalStorage(this);
}
#Override
public void onClick(View v) {
switch (v.getId()){
case R.id.blogin:
User user= new User(null, null);
userLocalStorage.storeUserData(user);
userLocalStorage.SetUserLoggedIn(true);
break;
case R.id.RegisterHere:
startActivity(new Intent(this,Register.class));
break;
case R.id.Skip:
startActivity(new Intent(this,MainActivity.class));
break;
}
}
}
activity_login.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:background="#drawable/screen1"
android:orientation="vertical"
tools:ignore="HardcodedText" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1.2"
android:orientation="vertical">
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.3"
android:orientation="vertical">
<EditText
android:layout_width="350dp"
android:layout_height="35dp"
android:layout_gravity="center"
android:background="#drawable/text"
android:textColor="#A9A9A9A9"
android:textStyle="normal"
android:textSize="20sp"
android:textAlignment="center"
android:text="Username"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.4"
android:orientation="vertical">
<EditText
android:layout_width="350dp"
android:layout_height="35dp"
android:layout_gravity="center"
android:background="#drawable/text"
android:textColor="#A9A9A9A9"
android:textStyle="normal"
android:textSize="20sp"
android:textAlignment="center"
android:text="Password"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.8"
android:orientation="vertical">
<Button
android:layout_width="#android:dimen/thumbnail_width"
android:layout_height="#android:dimen/app_icon_size"
android:layout_gravity="center"
android:background="#drawable/button"
android:textColor="#ffffff"
android:textStyle="bold"
android:textSize="20dp"
android:text="Login"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.2"
android:orientation="vertical">
<Button
android:layout_width="120dp"
android:layout_height="25dp"
android:layout_gravity="center"
android:background="#null"
android:textColor="#ffffff"
android:textStyle="bold"
android:textSize="15dp"
android:text="Register"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.4"
android:orientation="vertical">
<Button
android:layout_width="120dp"
android:layout_height="25dp"
android:layout_gravity="center"
android:background="#null"
android:textColor="#ffffff"
android:textStyle="bold"
android:textSize="15dp"
android:text="Skip"/>
</LinearLayout>
</LinearLayout>
Thanks for help guys!
Look at your activity_login.xml to ensure that the ID's you are trying to reference are linked to your UI elements in the layout file. It seems like you are trying to link the class level variable to itself in the findViewById() instead of linking the variable to the ID's in the layout file of the corresponding UI elements.
EDIT:
None of your UI elements (EditText fields, Buttons, or even LinearLayouts) have ID's associated with them. You can either double click the elements when viewing activity_login.xml in the 'Desgin' view to set an ID for the specific element. Otherwise, you can define an ID for the element in the 'Properties' window or explicitly write out android:id="#+id/yourIDHere" in the 'Text' view of the layout file. Whatever you decide to make your ID, you then must call that in name in findViewById() like so: findViewById(R.id.yourIDHere);.
Hope this helps!
I have two layouts. I want to keep one layout gone when the activity is loaded and it should be visible onClick of another layout. so I have added this code OnClickListener of the layout.
additionalContactFrom.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(linearLayoutFrom.getVisibility() == View.GONE){
linearLayoutFrom.setVisibility(View.VISIBLE);
}else{
linearLayoutFrom.setVisibility(View.GONE);
}
}
});
And have set visibility of the layout gone in xml file..
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/LinearLayoutAdditionalContactFrom">
<ImageView
android:layout_width="25dp"
android:layout_height="25dp"
android:id="#+id/imageView13"
android:layout_marginLeft="20dp"
android:background="#drawable/ic_person_black_48dp"
android:layout_marginTop="05dp"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/editText"
android:layout_marginRight="10dp"
android:drawableRight="#drawable/ic_expand_more_black_24dp"
android:text="Additional contact (optional)"
android:cursorVisible="false"
/>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="60dp"
android:layout_marginRight="50dp"
android:layout_gravity="center"
android:visibility="gone"
android:id="#+id/LinearLayoutFrom">
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/editText2"
android:layout_weight="1"
android:hint="Name"
android:layout_gravity="center"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/editText3"
android:layout_weight="1"
android:hint="Phone"
android:layout_gravity="center"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="OR"
android:id="#+id/textView19"
android:layout_gravity="center" />
</LinearLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:id="#+id/textView13"
android:layout_marginLeft="48dp"
android:hint="Input if you're not receiver" />
</LinearLayout>
Unable to understand whats going wrong.. The listener is not getting called at all.. Please help..
Your problem is that your EditText is capturing the click event when you click on it. If you click somewhere else in the LinearLayout it should work.
You can replace the EditText with a TextView if you don't need the user to edit the content.
Change
linearLayoutFrom.setVisibility(View.VISIBLE);
To
findViewById(R.id.YOURLAYOUTID).setVisibility(View.VISIBLE);
I think you can't access to local vars in sub methods
It Seems That Layout Visibility is Already set to GONE, so Onlick listener is not working on hidden View and it should not work too.
INVISBLE means you are trying to add a listener to a view which is not there. You can add the listener to a visible view only.
WORKAROUND
1) Try to make a dummy view which is visible but having the same color as background.
2) Try to set the listener for parent and check the position (whether the position does
belongs to INVISIBLE view).
Please try to set the onClickListener to the EditText and to the ImageView and no to the LinearLayout
The problem is that the Handler of the EditText is most important that the LinearLayout handler.
Almost you can try to make a break point to the OnClick and see what is happend
This is an example to explain you how to do that:
in MainActivity Class:
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.Toast;
public class MainActivity extends Activity {
private LinearLayout linearLayoutFrom;
private LinearLayout additionalContactFrom;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
additionalContactFrom = (LinearLayout) findViewById(R.id.LinearLayoutAdditionalContactFrom);
linearLayoutFrom = (LinearLayout) findViewById(R.id.LinearLayoutFrom);
linearLayoutFrom.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(),
"linearLayoutFrom clicked!!!", Toast.LENGTH_SHORT)
.show();
if (additionalContactFrom.getVisibility() == View.GONE) {
additionalContactFrom.setVisibility(View.VISIBLE);
} else {
additionalContactFrom.setVisibility(View.GONE);
}
}
});
additionalContactFrom.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(),
"additionalContactFrom clicked!!!", Toast.LENGTH_SHORT)
.show();
if (linearLayoutFrom.getVisibility() == View.GONE) {
linearLayoutFrom.setVisibility(View.VISIBLE);
} else {
linearLayoutFrom.setVisibility(View.GONE);
}
}
});
}
}
in xml file:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/LinearLayoutAdditionalContactFrom"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/holo_blue_dark"
android:orientation="horizontal" >
</LinearLayout>
<LinearLayout
android:id="#+id/LinearLayoutFrom"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:layout_marginLeft="60dp"
android:layout_marginRight="50dp"
android:background="#android:color/holo_green_light"
android:orientation="vertical"
android:visibility="gone" >
</LinearLayout>
<TextView
android:id="#+id/textView13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="48dp"
android:hint="Input if you're not receiver"
android:textAppearance="?android:attr/textAppearanceSmall" />
</FrameLayout>
This is very important that when you want add some view (for example
add a linearlayout to another linerlayout). you should use framelayout or
relativelayout(do not use linearlayout) for do that.
I've got a problem with my listview. When I press a button it should add an item to a listview, but it doesn't. I've used a Toast to be sure that the onClick event for the button is good. Can anyone help me ?
This is the fragment's java code.
package com.wordpress.softwarebycs.i_cseditor;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.text.Layout;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TabHost;
import android.widget.TabWidget;
import android.widget.TextView;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
/**
* Created by Cosmin on 11.04.2015.
*/
public class code_Fragment extends Fragment implements AdapterView.OnItemSelectedListener{
View rootview;
WebView previewBrowser;
EditText codebox,fname;
Button save_btn;
Spinner spinner;
ArrayList<String> list = new ArrayList<String>();
ArrayAdapter<String> list_adapter;
ListView projects;
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstance)
{
rootview = inflater.inflate(R.layout.code_layout,container, false);
previewBrowser = (WebView)rootview.findViewById(R.id.previewBrowser);
codebox= (EditText)rootview.findViewById(R.id.codebox);
projects=(ListView)rootview.findViewById(R.id.projectsListView);
list_adapter=new ArrayAdapter<String>(rootview.getContext(), android.R.layout.simple_list_item_1, list);
projects.setAdapter(list_adapter);
list.clear();
save_btn=(Button)rootview.findViewById(R.id.save_btn);
save_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
writeFile();
}
});
fname=(EditText)rootview.findViewById(R.id.fname);
spinner= (Spinner)rootview.findViewById(R.id.spinner);
ArrayAdapter adapter = ArrayAdapter.createFromResource(rootview.getContext(),R.array.spinner_items,android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
final TabHost tabHost=(TabHost)rootview.findViewById(R.id.tabHost);
tabHost.setup();
tabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {
#Override
public void onTabChanged(String tabId) {
String file="i_C_s_editor_temp_file_ne_trebuie_un_nume_lung_tare_de_tot.html";
try {
FileOutputStream fos = getActivity().openFileOutput(file, Context.MODE_PRIVATE);
fos.write(codebox.getText().toString().getBytes());
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
previewBrowser.loadUrl("file:///data/data/com.wordpress.softwarebycs.i_cseditor/files/"+file);
}
});
TabHost.TabSpec spec1=tabHost.newTabSpec("Code");
spec1.setContent(R.id.codeTab);
spec1.setIndicator("Code");
TabHost.TabSpec spec2=tabHost.newTabSpec("Preview");
spec2.setContent(R.id.previewTab);
spec2.setIndicator("Preview");
TabHost.TabSpec spec3=tabHost.newTabSpec("File");
spec3.setContent(R.id.fileTab);
spec3.setIndicator("File");
tabHost.addTab(spec1);
tabHost.addTab(spec2);
tabHost.addTab(spec3);
for(int i=0;i<tabHost.getTabWidget().getChildCount();i++)
{
TextView tv = (TextView) tabHost.getTabWidget().getChildAt(i).findViewById(android.R.id.title);
tv.setTextColor(Color.parseColor("#ffe0e0e0"));
}
projects.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parentAdapter, View view, int position, long id) {
TextView clickedView = (TextView) view;
readFile(clickedView.getText().toString());
//tabHost.setCurrentTab(0);
}
});
return rootview;
}
public void writeFile()
{
String FILE_NAME=fname.getText().toString()+spinner.getSelectedItem().toString();
try {
FileOutputStream fos = getActivity().openFileOutput(FILE_NAME, Context.MODE_PRIVATE);
fos.write(codebox.getText().toString().getBytes());
list.add(FILE_NAME);
Toast toast = Toast.makeText(rootview.getContext(),
"File saved!",
Toast.LENGTH_SHORT);
toast.show();
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
public void actionStopped(){
try {
FileOutputStream fos = getActivity().openFileOutput("cfg2.txt", Context.MODE_PRIVATE);
Integer k;
for(k=0;k<list.size();k++)
{fos.write(list.get(k).toString().getBytes());
fos.write(System.getProperty("line.separator").getBytes());}
fos.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public void actionResummed() {
list.clear();
try {
BufferedReader bReader = new BufferedReader(new InputStreamReader(getActivity().openFileInput("cfg2.txt")));
String line;
while ((line = bReader.readLine()) != null) {
list.add(line);
}
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void onResume() {
super.onResume();
actionResummed();
}
#Override
public void onPause() {
super.onPause();
actionStopped();
}
public void readFile(String path)
{
codebox.setText("");
try {
BufferedReader bReader = new BufferedReader(new InputStreamReader(getActivity().openFileInput(path)));
String line;
while ((line = bReader.readLine()) != null) {
codebox.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
And this is the fragment's xml
<?xml version="1.0" encoding="utf-8"?>
<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="match_parent" android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin" tools:context=".MainActivity"
android:background="#ff666666">
<TabHost
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/tabHost"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#ff8a3e6b">
<TabWidget
android:id="#android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"></TabWidget>
<FrameLayout
android:id="#android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:id="#+id/codeTab"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<EditText
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:inputType="textMultiLine"
android:ems="10"
android:id="#+id/codebox"
android:gravity="top|left"
android:background="#ffffffff"
android:scrollbars="vertical|horizontal"/>
</LinearLayout>
<LinearLayout
android:id="#+id/previewTab"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<WebView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/previewBrowser"
android:scrollbars="vertical|horizontal"
></WebView>
</LinearLayout>
<!--fileTab-->
<LinearLayout
android:id="#+id/fileTab"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ff666666"
android:orientation="vertical"
>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/linearLayout"
android:layout_marginBottom="20dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="File's Name"
android:id="#+id/textView2"
android:layout_gravity="center_horizontal"
android:textColor="#ffe0e0e0"
android:layout_below="#+id/linearLayout"
android:layout_centerHorizontal="true"
android:layout_marginTop="20dp" />
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/linearLayout"
android:layout_centerHorizontal="true"
android:id="#+id/linearLayout2">
<EditText
android:layout_width="237dp"
android:layout_height="41dp"
android:id="#+id/fname"
android:layout_marginTop="10dp"
android:background="#ff8a3e6b"
android:textColor="#ffe0e0e0" />
<Spinner
android:layout_width="fill_parent"
android:layout_height="41dp"
android:id="#+id/spinner"
android:background="#ff8a3e6b"
android:layout_marginTop="9dp"
/>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/linearLayout2"
android:layout_centerHorizontal="true"
android:id="#+id/linearLayout3">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save File"
android:id="#+id/save_btn"
android:layout_gravity="center"
android:layout_marginTop="10dp"
android:background="#ff8a3e6b"
android:textColor="#ffe0e0e0"
/>
</LinearLayout>
<!-- separator-->
<TextView
android:layout_width="fill_parent"
android:layout_height="1dp"
android:id="#+id/separator"
android:background="#ff8a3e6b"
android:layout_marginTop="5dp" />
<!--open file -->
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/separator"
android:layout_centerHorizontal="true"
android:id="#+id/linearLayout4">
<TextView
android:paddingTop="20dp"
android:paddingBottom="20dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/text2"
android:textSize="25dp"
android:text="Select file to open!"
android:layout_gravity="top|center"
/>
<ListView
android:layout_width="fill_parent"
android:layout_below="#+id/text2"
android:layout_height="fill_parent"
android:id="#+id/projectsListView"
android:scrollbars="vertical|horizontal"
android:background="#ff8a3e6b">
</ListView>
</LinearLayout>
</LinearLayout>
</FrameLayout>
</LinearLayout>
</TabHost>
</RelativeLayout>
To update listview you have to notify it, I don't see notifying method in your click method
Add below code in
save_btn.setOnClickListener //Method after calling to writeFile() Method
list_adapter.notifyDataSetChanged();