Android getDrawingCache 得到都是同一个图片

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Android getDrawingCache 得到都是同一个图片3

/**
	 * 获取屏幕图像
	 * 
	 * @return
	 */
	private Bitmap takeScreenShot() {
		// View截图的View
		View v = getWindow().getDecorView();
		 v.clearFocus(); // 清除视图焦点
		 v.setPressed(false);// 将视图设为不可点击

		int currScreen = getWorkspace().getCurrentScreen();
		int screenCount = getWorkspace().getChildCount();
		// 壁纸管理器
		WallpaperManager wpm = (WallpaperManager) getSystemService(Context.WALLPAPER_SERVICE);
		// 屏宽
		int screenWidth = v.getWidth();
		int screenHeight = v.getHeight();
		// 壁纸图片
		Drawable d = wpm.getDrawable();

		// 壁纸宽与高
		int wallPaperWidth = d.getIntrinsicWidth();
		int wallPaperHeight = d.getIntrinsicHeight();

		// 去掉标题栏,截取标签条顶部
		// int i = lis.getTop() + statusBarHeight;
		int i = statusBarHeight();

		// 将壁纸生成bitmap
		Bitmap bmp1 = Bitmap.createBitmap(wallPaperWidth, wallPaperHeight, d.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);
		Canvas canvas = new Canvas(bmp1);
		d.setBounds(0, 0, wallPaperWidth, wallPaperHeight);
		d.draw(canvas);

		// 截取壁纸时的开始位置，计算每次切屏时，壁纸移动的宽度
		int begin = currScreen * ((wallPaperWidth - screenWidth) / (screenCount - 1));

		Log.i("app", "begin = "+begin);
		// //截取当前屏的壁纸，
		Bitmap bmp2 = Bitmap.createBitmap(bmp1, begin, 0, screenWidth, screenHeight);
		bmp2 = Bitmap.createBitmap(bmp2, 0, i, screenWidth, screenHeight - i);
		
//		mWorkspace.enableChildrenCache();
		//mWorkspace.getCellLayoutAt(mWorkspace.mCurrentScreen).setChildrenDrawingCacheEnabled(true);
//		userGroupArea.openChildrenCache();
		
		
		v.setDrawingCacheEnabled(true);
		v.buildDrawingCache();
		// 截取图标
		Bitmap bmp3 = v.getDrawingCache();
		Log.i("app", "cache  =  " + v.isDrawingCacheEnabled() + "=======" + ViewConfiguration.get(this).getScaledMaximumDrawingCacheSize());
//		if (bmp3 == null) {
//			
//			v.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
//			v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
//			v.buildDrawingCache();
//			bmp3=v.getDrawingCache();
//		}
		Bitmap bmp4 = Bitmap.createBitmap(bmp3, 0, i, screenWidth, screenHeight - i);
		Bitmap bitmap = Bitmap.createBitmap(bmp4.getWidth(), bmp4.getHeight(), d.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);

		canvas = new Canvas(bitmap);
		canvas.drawBitmap(bmp2, 0, 0, null);
		canvas.drawBitmap(HideAppsUtil.removeColor(bmp4), 0, 0, null);
		canvas.save(Canvas.ALL_SAVE_FLAG);
		canvas.restore();
		
		// 将桌面背景还原
		v.setBackgroundDrawable(null);
		v.destroyDrawingCache();
		
		bmp1.recycle();
		bmp2.recycle();
		bmp3.recycle();
		bmp4.recycle();
		return bitmap;
	}

在launcher 每次滑动的图片都不一样，但是getDrawingCache 图像却都一样。

2012年5月17日 14:57