BitmapUtils.java 文件源码

/**
 * 从视图创建位图
 * @param view
 * @return
 */
public static Bitmap createBitmapFromView(View view) {
    if (view instanceof ImageView) {
        Drawable drawable = ((ImageView) view).getDrawable();
        if (drawable != null && drawable instanceof BitmapDrawable) {
            return ((BitmapDrawable) drawable).getBitmap();
        }
    }
    view.clearFocus();
    Bitmap bitmap = createBitmapSafely(view.getWidth(),
            view.getHeight(), Bitmap.Config.ARGB_8888, 1);
    if (bitmap != null) {
        synchronized (sCanvas) {
            Canvas canvas = sCanvas;
            canvas.setBitmap(bitmap);
            view.draw(canvas);
            canvas.setBitmap(null);
        }
    }
    return bitmap;
}