好吧，我在三星Galaxy Y和三星Galaxy Ace Duos上测试了我的动态壁纸，但是当我在Xperia E和Xperia J上测试时，它说，“不幸的是，动态壁纸意外停止了”。我在API级别为17的模拟器上进行了测试。它工作正常。
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
}
/*Method called when the Live Wallpaper loads on device.*/
@Override
public Engine onCreateEngine() {
context = this;
return new MyWallpaperEngine();
}
/*Creating a context to refer to the class.*/
Context context;
/ WallpaperEngine类的定义 /
private class MyWallpaperEngine extends Engine implements SharedPreferences.OnSharedPreferenceChangeListener{
/*Instance Variables of the above class.*/
private final Handler handler = new Handler();
private SharedPreferences mPreferences;
private String mMode = "random";
private final Runnable drawRunner = new Runnable() {
public void run() {
draw();
}
};
public Bitmap[] image = new Bitmap[26];
private boolean visible;
private int i ;
public MyWallpaperEngine() {
image[0] = BitmapFactory.decodeResource(getResources(),
R.drawable.image1);
image[1] = BitmapFactory.decodeResource(getResources(),
R.drawable.image2);
image[2] = BitmapFactory.decodeResource(getResources(),
R.drawable.image3);
image[3] = BitmapFactory.decodeResource(getResources(),
R.drawable.image4);
image[4] = BitmapFactory.decodeResource(getResources(),
R.drawable.image5);
image[5] = BitmapFactory.decodeResource(getResources(),
R.drawable.image6);
image[6] = BitmapFactory.decodeResource(getResources(),
R.drawable.image7);
image[7] = BitmapFactory.decodeResource(getResources(),
R.drawable.image8);
image[8] = BitmapFactory.decodeResource(getResources(),
R.drawable.image9);
image[9] = BitmapFactory.decodeResource(getResources(),
R.drawable.image10);
image[10] = BitmapFactory.decodeResource(getResources(),
R.drawable.image11);
image[11] = BitmapFactory.decodeResource(getResources(),
R.drawable.image12);
image[12] = BitmapFactory.decodeResource(getResources(),
R.drawable.image13);
image[13] = BitmapFactory.decodeResource(getResources(),
R.drawable.image14);
image[14] = BitmapFactory.decodeResource(getResources(),
R.drawable.image15);
image[15] = BitmapFactory.decodeResource(getResources(),
R.drawable.image16);
image[16] = BitmapFactory.decodeResource(getResources(),
R.drawable.image17);
image[17] = BitmapFactory.decodeResource(getResources(),
R.drawable.image18);
image[18] = BitmapFactory.decodeResource(getResources(),
R.drawable.image19);
image[19] = BitmapFactory.decodeResource(getResources(),
R.drawable.image20);
image[20] = BitmapFactory.decodeResource(getResources(),
R.drawable.image21);
image[21] = BitmapFactory.decodeResource(getResources(),
R.drawable.image22);
image[22] = BitmapFactory.decodeResource(getResources(),
R.drawable.image23);
image[23] = BitmapFactory.decodeResource(getResources(),
R.drawable.image24);
image[24] = BitmapFactory.decodeResource(getResources(),
R.drawable.image25);
mPreferences = LiveWallpaper.this.getSharedPreferences(SHARED_PREFS_NAME, 0);
mPreferences.registerOnSharedPreferenceChangeListener(this);
onSharedPreferenceChanged(mPreferences,null);
handler.post(drawRunner);
}
public void onSharedPreferenceChanged(
SharedPreferences prefs, String key) {
mMode = prefs.getString("livewallpaper_mode", "random");
}
@Override
public void onCreate(SurfaceHolder surfaceHolder)
{
super.onCreate(surfaceHolder);
setTouchEventsEnabled(true);
}
@Override
public void onDestroy()
{
super.onDestroy();
handler.removeCallbacks(drawRunner);
System.gc();
}
@Override
public void onVisibilityChanged(boolean visible) {
this.visible = visible;
if (visible) {
handler.post(drawRunner);
} else {
handler.removeCallbacks(drawRunner);
}
}
@Override
public void onSurfaceCreated(SurfaceHolder holder)
{
super.onSurfaceCreated(holder);
}
@Override
public void onSurfaceDestroyed(SurfaceHolder holder) {
super.onSurfaceDestroyed(holder);
this.visible = false;
handler.removeCallbacks(drawRunner);
}
@Override
public void onSurfaceChanged(SurfaceHolder holder, int format,
int width, int height) {
super.onSurfaceChanged(holder, format, width, height);
}
private void draw() {
Random random = new Random();// Creates a new random generator.
SurfaceHolder holder = getSurfaceHolder();//Creates a surface controller
Canvas canvas = null;//Sets the canvas to null
try {
canvas = holder.lockCanvas();
if (canvas != null) {
DisplayMetrics metrics = context.getResources().getDisplayMetrics();
int width = metrics.widthPixels;//Gets the metrics width
int height = metrics.heightPixels;//Gets the metrics height
if(mMode.compareToIgnoreCase("aerial") == 0){
i = AERIAL_MIN + random.nextInt(AERIAL_MAX);
canvas.drawBitmap(Bitmap.createScaledBitmap(image[i],
width, height, false), 0, 0, null);
}else if(mMode.compareToIgnoreCase("pitchside")==0){
i = AERIAL_MAX + random.nextInt(PITCH_MAX-AERIAL_MAX);
canvas.drawBitmap(Bitmap.createScaledBitmap(image[i],
width, height, false), 0, 0, null);
}else if(mMode.compareToIgnoreCase("stadium")==0){
i = PITCH_MAX + random.nextInt(STAD_MAX-PITCH_MAX);
canvas.drawBitmap(Bitmap.createScaledBitmap(image[i],
width, height, false), 0, 0, null);
}else {
i = random.nextInt(STAD_MAX);
canvas.drawBitmap(Bitmap.createScaledBitmap(image[i],
width, height, false), 0, 0, null);
}
}
} finally {
if (canvas != null)
holder.unlockCanvasAndPost(canvas);
}
handler.removeCallbacks(drawRunner);
if (visible) {
handler.postDelayed(drawRunner, 10000);//Called to delay(pause the thread) the image by 10000 milliseconds
}
}
}
}
Logcat：
07-06 21:50:28.807: W/dalvikvm(14567): threadid=1: thread exiting with uncaught exception (group=0x40cfa498)
07-06 21:50:28.907: W/BugSenseHandler(14567): Transmitting crash Exception Unable to resolve host "bugsense.appspot.com": No address associated with hostname
07-06 21:50:31.857: E/test(14567): Exception
07-06 21:50:31.857: E/test(14567): OutOfMemoryError
07-06 21:50:32.487: E/dalvikvm(14567): can't open /mnt/sdcard/20130706-162031.hprof: Permission denied
07-06 21:50:32.497: E/test(14567): writeHprofDataToFile: caught java.lang.RuntimeException: Failure during heap dump; check log output for details
07-06 21:50:32.507: E/AndroidRuntime(14567): FATAL EXCEPTION: main
07-06 21:50:32.507: E/AndroidRuntime(14567): java.lang.OutOfMemoryError
07-06 21:50:32.507: E/AndroidRuntime(14567): at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
07-06 21:50:32.507: E/AndroidRuntime(14567): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:500)
07-06 21:50:32.507: E/AndroidRuntime(14567): at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:353)
07-06 21:50:32.507: E/AndroidRuntime(14567): at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:376)
07-06 21:50:32.507: E/AndroidRuntime(14567): at android.graphics.BitmapFactory.decodeResource(BitmapFactory.java:406)
07-06 21:50:32.507: E/AndroidRuntime(14567): at app.sunny.soccerstadiumlivewallpaper.LiveWallpaper$MyWallpaperEngine.<init> (LiveWallpaper.java:118)
07-06 21:50:32.507: E/AndroidRuntime(14567): at app.sunny.soccerstadiumlivewallpaper.LiveWallpaper.onCreateEngine(LiveWallpaper.java:59)
07-06 21:50:32.507: E/AndroidRuntime(14567): at android.service.wallpaper.WallpaperService$IWallpaperEngineWrapper.executeMessage(WallpaperService.java:1012)
07-06 21:50:32.507: E/AndroidRuntime(14567): at com.android.internal.os.HandlerCaller$MyHandler.handleMessage(HandlerCaller.java:61)
07-06 21:50:32.507: E/AndroidRuntime(14567): at android.os.Handler.dispatchMessage(Handler.java:99)
07-06 21:50:32.507: E/AndroidRuntime(14567): at android.os.Looper.loop(Looper.java:137)
07-06 21:50:32.507: E/AndroidRuntime(14567): at android.app.ActivityThread.main(ActivityThread.java:4792)
07-06 21:50:32.507: E/AndroidRuntime(14567): at java.lang.reflect.Method.invokeNative(Native Method)
07-06 21:50:32.507: E/AndroidRuntime(14567): at java.lang.reflect.Method.invoke(Method.java:511)
07-06 21:50:32.507: E/AndroidRuntime(14567): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:808)
07-06 21:50:32.507: E/AndroidRuntime(14567): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:575)
07-06 21:50:32.507: E/AndroidRuntime(14567): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：0)
您正在将25张图片加载到内存中： image [24] = BitmapFactory.decodeResource（getResources（），R.drawable.image25）; 那么你为什么这样做呢？
我认为你永远不会同时展示所有这些（你不能，显示器太小）。因此，请尝试仅按需阅读图像。 如果你愿意展示一些拇指，那么创建一些并将这些小图片放入你的drawable / res文件夹。
你的记忆中永远不应该有多个图像。
另请查看http://developer.android.com/training/best-performance.html