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POwallpaper is stretching in background for android
 

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  1. POwallpaper is stretching in background for android
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    <p>I am creating an application using which I can set the image which is inside my application as a background of a phone. I am new in this field.I have already search everywhere and try to modify my code too but its not working.</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" &gt; &lt;LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal" &gt; &lt;Button android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="25" android:onClick="gotoPreviousImage" android:padding="10dip" android:text="&amp;lt;" /&gt; &lt;Button android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="50" android:onClick="setAsWallpaper" android:padding="10dip" android:text="Set as Background" /&gt; &lt;Button android:layout_width="0dip" android:layout_height="wrap_content" android:layout_weight="25" android:onClick="gotoNextImage" android:padding="10dip" android:text="&gt;" /&gt; &lt;/LinearLayout&gt; </code></pre> <p>My MainActivity.java file</p> <pre><code>package com.blundell.tutorial.ui.phone; import static com.blundell.tutorial.util.HeavyLifter.FAIL; import static com.blundell.tutorial.util.HeavyLifter.SUCCESS; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.View; import android.widget.ImageView; import android.widget.Toast; import com.blundell.tutorial.R; import com.blundell.tutorial.util.HeavyLifter; public class MainActivity extends Activity { private static final List&lt;Integer&gt; backgrounds = new ArrayList&lt;Integer&gt;(); /** The total number of backgrounds in the list */ private static final int TOTAL_IMAGES; static { backgrounds.add(R.drawable.background1); backgrounds.add(R.drawable.background2); backgrounds.add(R.drawable.background3); TOTAL_IMAGES = (backgrounds.size() - 1); } /** the state of what wallpaper is currently being previewed */ private int currentPosition = 0; /** our image wallpaper preview */ private ImageView backgroundPreview; private HeavyLifter chuckNorris; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); backgroundPreview = (ImageView) findViewById(R.id.backgroundPreview); // Set the default image to be shown to start with changePreviewImage(currentPosition); chuckNorris = new HeavyLifter(this, chuckFinishedHandler); } public void gotoPreviousImage(View v) { int positionToMoveTo = currentPosition; positionToMoveTo--; if(positionToMoveTo &lt; 0){ positionToMoveTo = TOTAL_IMAGES; } changePreviewImage(positionToMoveTo); } /** * Called from XML when the set wallpaper button is pressed * Thie retrieves the id of the current image from our list * It then asks chuck to set it as a wallpaper! * The chuckHandler will be called when this operation is complete * @param v */ public void setAsWallpaper(View v) { int resourceId = backgrounds.get(currentPosition); chuckNorris.setResourceAsWallpaper(resourceId); } /** * Called from XML when the next button is pressed * Increment the current state position * @param v */ public void gotoNextImage(View v) { int positionToMoveTo = currentPosition; positionToMoveTo++; if(currentPosition == TOTAL_IMAGES){ positionToMoveTo = 0; } changePreviewImage(positionToMoveTo); } /** * Change the currently showing image on the screen * This is quite an expensive operation as each time the system */ public void changePreviewImage(int pos) { currentPosition = pos; backgroundPreview.setImageResource(backgrounds.get(pos)); Log.d("Main", "Current position: "+pos); } /** */ private Handler chuckFinishedHandler = new Handler(){ @Override public void handleMessage(Message msg) { switch(msg.what){ case SUCCESS: Toast.makeText(MainActivity.this, "Wallpaper set", Toast.LENGTH_SHORT).show(); break; case FAIL: Toast.makeText(MainActivity.this, "Uh oh, can't do that right now", Toast.LENGTH_SHORT).show(); break; default: super.handleMessage(msg); } } }; </code></pre> <p>}</p> <pre><code>My another Heavylifter.java file package com.blundell.tutorial.util; import java.io.IOException; import android.app.WallpaperManager; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Handler; import android.util.Log; </code></pre> <p>/** * <b>This class uses Threads</b> * An alternative to this class would be to use an ASyncTask * @author blundell * */ public class HeavyLifter {</p> <pre><code>public static final int SUCCESS = 0; public static final int FAIL = 1; private final Context context; private final Handler callback; private WallpaperManager manager; /** * Setup the HeavyLifter * @param context the context we are running in - typically an activity * @param callback the handler you want to be notified when we finish doing an operation */ public HeavyLifter(Context context, Handler callback) { this.context = context; this.callback = callback; this.manager = (WallpaperManager) context.getSystemService(Context.WALLPAPER_SERVICE); } /** * Takes a resource id of a file within our /res/drawable/ folder&lt;br/&gt; * It then spawns a new thread to do its work on&lt;br/&gt; * The reource is decoded and converted to a byte array&lt;br/&gt; * This array is passed to the system which can use it to set the phones wallpaper&lt;br/&gt; * Upon completion the callback handler is sent a message with eith {@link HeavyLifter#SUCCESS} or {@link HeavyLifter#FAIL} * * @param resourceId id of a file within our /res/drawable/ folder */ public void setResourceAsWallpaper(final int resourceId) { new Thread() { @Override public void run() { try { manager.setBitmap(getImage(resourceId)); callback.sendEmptyMessage(SUCCESS); } catch (IOException e) { Log.e("Main", "Cant set wallpaper"); callback.sendEmptyMessage(FAIL); } } }.start(); } /** * Decodes a resource into a bitmap, here it uses the convenience method 'BitmapFactory.decodeResource', but you can decode * using alternatives these will give you more control over the size and quality of the resource. * You may need certain size resources within each of your /hdpi/ /mdpi/ /ldpi/ folders in order * to have the quality and look you want on each different phone. */ private Bitmap getImage(int resourceId) { Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), resourceId, null); Bitmap scaledBitmap = Bitmap.createScaledBitmap(bitmap, manager.getDesiredMinimumWidth(), manager.getDesiredMinimumHeight(), true); bitmap.recycle(); bitmap = null; return scaledBitmap; } </code></pre> <p>}</p>
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    1. PTQuestion
    1. USYogesh Kumar
    1. USYogesh Kumar
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    1. This table or related slice is empty.
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    1. COCan you show some code of what you have tried so far.
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      1. POwallpaper is stretching in background for android
      1. USJohnny Broberg
    2. COAndroid: how to get ImageView to fill screen http://stackoverflow.com/a/9230106/1012284
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      1. POwallpaper is stretching in background for android
      1. USPadma Kumar
    3. COdo you got some error? or something else? from what I see you didn't properly closed the linear layout in the xml file
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      1. POwallpaper is stretching in background for android
      1. USNiko Adrianus Yuwono
 

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