Android ViewAnimator和OutOfMemoryError

Question

這是情況：我有一個ViewAnimator有三種不同的佈局。每個佈局具有不同的背景圖像。對於xhdpi設備，圖像大小爲1280x800像素，大小約爲150KB。 現在的問題：當我開始用尺寸爲1280x800和320dp密度模擬器，我總是收到此異常：

09-02 08:22:46.408: D/dalvikvm(1291): GC_EXTERNAL_ALLOC freed 428K, 51% free 2874K/5831K, external 18484K/20407K, paused 83ms 
09-02 08:22:46.419: E/dalvikvm-heap(1291): 1366400-byte external allocation too large for this process. 
09-02 08:22:46.498: I/dalvikvm-heap(1291): Clamp target GC heap from 25.089MB to 24.000MB 
09-02 08:22:46.498: E/GraphicsJNI(1291): VM won't let us allocate 1366400 bytes 
09-02 08:22:49.208: E/AndroidRuntime(1291): java.lang.OutOfMemoryError: bitmap size exceeds VM budget 

有任何人對我的問題的解決方案或替代方法？ 我讀了一些關於BitmapFactory的內容。它有幫助嗎？ 最好的問候！

編輯：這裏是我的代碼： 佈局文件main_layout.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:gravity="center" 
android:orientation="vertical" > 

<ViewAnimator 
    android:id="@+id/viewAnimator" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" > 

    <LinearLayout 
     android:id="@+id/LayoutMain" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:gravity="center" 
     android:orientation="vertical" 
     android:background="@drawable/background" 
     ...some Buttons etc. ... 
    </LinearLayout> 

    <LinearLayout 
     android:id="@+id/layoutGameMenu" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:gravity="center" 
     android:orientation="vertical" 
     android:background="@drawable/gameMenu" 
     ...some Buttons etc. ... 
    </LinearLayout> 

    <LinearLayout 
     android:id="@+id/layoutHighscores" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:orientation="vertical" 
     android:background="@drawable/highscores" 
     ...some ListViews etc. ... 
    </LinearLayout> 

</ViewAnimator> 
</LinearLayout> 

而且在MainActivity：

private ViewAnimator va; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main_layout); 
    va = (ViewAnimator) findViewById(R.id.viewAnimator); 
    .... 
} 

.... 
@Override 
public boolean onKeyDown(int keyCode, KeyEvent event) { 
    if(event.getKeyCode() == KeyEvent.KEYCODE_BACK) { 
     if (va.getCurrentView() == findViewById(R.id.layoutHighscores)) { 
      va.setInAnimation(inFromRight); 
      va.setOutAnimation(outToLeft); 
      va.setDisplayedChild(0); 
      return true; 
     } 
     if (va.getCurrentView() == findViewById(R.id.layoutGameMenu)) { 
      va.setInAnimation(inFromLeft); 
      va.setOutAnimation(outToRight); 
      va.setDisplayedChild(0); 
      return true; 
     } 
    } 
    return super.onKeyDown(keyCode, event); 
} 

有了這個，我可以的MainMenu之間切換時，高分和帶按鈕的遊戲菜單來啓動遊戲模式。我選擇這個是因爲我想要「酷」的視圖動畫。

我試圖用BitmapFactory方法解決它，但沒有改變。

public static Bitmap decodeSampledBitmapFromResource(Resources res, int resId, int reqWidth, int reqHeight) { 

    // First decode with inJustDecodeBounds=true to check dimensions 
    final BitmapFactory.Options options = new BitmapFactory.Options(); 
    options.inJustDecodeBounds = true; 
    BitmapFactory.decodeResource(res, resId, options); 

    // Calculate inSampleSize 
    options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); 

    // Decode bitmap with inSampleSize set 
    options.inJustDecodeBounds = false; 
    return BitmapFactory.decodeResource(res, resId, options); 
} 

public static int calculateInSampleSize(BitmapFactory.Options options, int reqWidth, int reqHeight) { 
// Raw height and width of image 
final int height = options.outHeight; 
final int width = options.outWidth; 
int inSampleSize = 1; 

if (height > reqHeight || width > reqWidth) { 
    if (width > height) { 
     inSampleSize = Math.round((float)height/(float)reqHeight); 
    } else { 
     inSampleSize = Math.round((float)width/(float)reqWidth); 
    } 
} 
return inSampleSize; 
} 

Answer 1

有覆蓋主的Android網站的Android培訓部分這種情況的一個教訓。教訓Displaying Bitmaps Efficiently分爲四個部分，包括工作示例，並支持API等級7及以上（我認爲這不是問題）。因此可以提供更具體的幫助。 ;-)