android View 转Bit地图

 /**
     *  added by yangguangfu Draw the view into a bitmap.
     */
   private  Bitmap getViewBitmap(View v) {
    	  Bitmap bitmap=null;
    	if(v!=null){
    		 v.clearFocus();
    	        v.setPressed(false);

    	        boolean willNotCache = v.willNotCacheDrawing();
    	        v.setWillNotCacheDrawing(false);

    	        // Reset the drawing cache background color to fully transparent
    	        // for the duration of this operation
    	        int color = v.getDrawingCacheBackgroundColor();
    	        v.setDrawingCacheBackgroundColor(0);
    	        float alpha = v.getAlpha();
    	        v.setAlpha(1.0f);

    	        if (color != 0) {
    	            v.destroyDrawingCache();
    	        }
    	        v.buildDrawingCache();
    	        Bitmap cacheBitmap = v.getDrawingCache();
    	        if (cacheBitmap == null) {
    	            Log.e(TAG, "failed getViewBitmap(" + v + ")", new RuntimeException());
    	            return null;
    	        }

    	         bitmap = Bitmap.createBitmap(cacheBitmap);

    	        // Restore the view
    	        v.destroyDrawingCache();
    	        v.setAlpha(alpha);
    	        v.setWillNotCacheDrawing(willNotCache);
    	        v.setDrawingCacheBackgroundColor(color);

    	}
       
        return bitmap;
    }