将布局保存为位图

我想将我的Linearlayout保存为bmp.

因此,我使用以下代码执行此操作:

        public Bitmap viewToBitmap(View view) {
            Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888);
            Canvas canvas = new Canvas(bitmap);
            view.draw(canvas);
            return bitmap;
        }

但如果我运行此代码,我的位图只包含ImageView(ImageView_qrcode).我检查了一下.如果我给Linearview充气TextViews正确显示,但输出bmp只包含ImageView有人知道的原因吗？

你可以尝试这个解决方案:

public static Bitmap getBitmapFromView(View view) {
    Bitmap returnedBitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(),Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(returnedBitmap);
    Drawable bgDrawable =view.getBackground();
    if (bgDrawable!=null) {
    bgDrawable.draw(canvas);
    } else {
        canvas.drawColor(Color.WHITE);
    }
    view.draw(canvas);
    return returnedBitmap;
}

有绘图缓存的解决方案:

public Bitmap getBitmapFromView(View view){
    view.setDrawingCacheEnabled(true);
    return view.getDrawingCache();
}