android 把view转成bit地图

private Bitmap getViewBitmap(View v) {        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);        if (color != 0) {            v.destroyDrawingCache();        }        v.buildDrawingCache();        Bitmap cacheBitmap = v.getDrawingCache();        if (cacheBitmap == null) {            Log.e("TTTTTTTTActivity", "failed getViewBitmap(" + v + ")", new RuntimeException());            return null;        }        Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);        // Restore the view        v.destroyDrawingCache();        v.setWillNotCacheDrawing(willNotCache);        v.setDrawingCacheBackgroundColor(color);        return bitmap;    }

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