将一个view对象转换为bitmap对象

 private Bitmap getViewBitmap(View addViewContent) {

        addViewContent.setDrawingCacheEnabled(true);

        addViewContent.measure(

                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),

                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));

        addViewContent.layout(0, 0,

                addViewContent.getMeasuredWidth(),

                addViewContent.getMeasuredHeight());

        addViewContent.buildDrawingCache();

        Bitmap cacheBitmap = addViewContent.getDrawingCache();

        Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);

        return bitmap;

    }