Question

我的布局中有8个数字ImageView，并且我已经将LongClickListner设置为所有ImageView。如果用户长按图像（任何图像），则图像将保存在图库中。但是我的问题是，当用户长按第8张图片时，第1张图片或其他图片（其中1张）会保存在图库中。我想要的是，当用户长按第8张图片时，第8张图片将不会保存其他图片。

 @Override
public boolean onContextItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.saveImage:
            if(img1.isLongClickable() ){
                BitmapDrawable bitmapDrawable = (BitmapDrawable)img1.getDrawable();
                Bitmap bitmap = bitmapDrawable.getBitmap();
                Random random = new Random();
                int x = random.nextInt(1000000);
                saveImageUtils.insertImage(getActivity().getContentResolver(),bitmap,String.valueOf(x));
                //SaveImage(bitmap);
                Toast.makeText(getContext(), "Image Saved to Device", Toast.LENGTH_SHORT).show();
                break;
            }else if(img2.isLongClickable()){
                BitmapDrawable bitmapDrawable = (BitmapDrawable)img2.getDrawable();
                Bitmap bitmap = bitmapDrawable.getBitmap();
                Random random = new Random();
                int x = random.nextInt(1000000);
                saveImageUtils.insertImage(getActivity().getContentResolver(),bitmap,String.valueOf(x));
                //SaveImage(bitmap);
                Toast.makeText(getContext(), "Image Saved to Device", Toast.LENGTH_SHORT).show();
                break;
            }else if(img3.isLongClickable()){
                BitmapDrawable bitmapDrawable = (BitmapDrawable)img3.getDrawable();
                Bitmap bitmap = bitmapDrawable.getBitmap();
                Random random = new Random();
                int x = random.nextInt(1000000);
                saveImageUtils.insertImage(getActivity().getContentResolver(),bitmap,String.valueOf(x));
                //SaveImage(bitmap);
                Toast.makeText(getContext(), "Image Saved to Device", Toast.LENGTH_SHORT).show();
                break;
            }else if(img4.isLongClickable()){
                BitmapDrawable bitmapDrawable = (BitmapDrawable)img4.getDrawable();
                Bitmap bitmap = bitmapDrawable.getBitmap();
                Random random = new Random();
                int x = random.nextInt(1000000);
                saveImageUtils.insertImage(getActivity().getContentResolver(),bitmap,String.valueOf(x));
                //SaveImage(bitmap);
                Toast.makeText(getContext(), "Image Saved to Device", Toast.LENGTH_SHORT).show();
                break;
            }else if(img5.isLongClickable()){
                BitmapDrawable bitmapDrawable = (BitmapDrawable)img5.getDrawable();
                Bitmap bitmap = bitmapDrawable.getBitmap();
                Random random = new Random();
                int x = random.nextInt(1000000);
                saveImageUtils.insertImage(getActivity().getContentResolver(),bitmap,String.valueOf(x));
                //SaveImage(bitmap);
                Toast.makeText(getContext(), "Image Saved to Device", Toast.LENGTH_SHORT).show();
                break;
            }else if(img6.isLongClickable()){
                BitmapDrawable bitmapDrawable = (BitmapDrawable)img6.getDrawable();
                Bitmap bitmap = bitmapDrawable.getBitmap();
                Random random = new Random();
                int x = random.nextInt(1000000);
                saveImageUtils.insertImage(getActivity().getContentResolver(),bitmap,String.valueOf(x));
                //SaveImage(bitmap);
                Toast.makeText(getContext(), "Image Saved to Device", Toast.LENGTH_SHORT).show();
                break;
            }else if(img7.isLongClickable()){
                BitmapDrawable bitmapDrawable = (BitmapDrawable)img7.getDrawable();
                Bitmap bitmap = bitmapDrawable.getBitmap();
                Random random = new Random();
                int x = random.nextInt(1000000);
                saveImageUtils.insertImage(getActivity().getContentResolver(),bitmap,String.valueOf(x));
                //SaveImage(bitmap);
                Toast.makeText(getContext(), "Image Saved to Device", Toast.LENGTH_SHORT).show();
                break;
            }else if(img8.isLongClickable()){
                BitmapDrawable bitmapDrawable = (BitmapDrawable)img8.getDrawable();
                Bitmap bitmap = bitmapDrawable.getBitmap();
                Random random = new Random();
                int x = random.nextInt(1000000);
                saveImageUtils.insertImage(getActivity().getContentResolver(),bitmap,String.valueOf(x));
                //SaveImage(bitmap);
                Toast.makeText(getContext(), "Image Saved to Device", Toast.LENGTH_SHORT).show();
                break;
            }

    }
    return super.onContextItemSelected(item);
}

Answer 1

您上面呈现的内容是这样的：

您的ImageView显然已分配了OnLongClickListener
用户单击工具栏的菜单项R.id.saveImage，而您正在尝试根据isLongClickable的指示保存图像

如果为true，则上述错误是因为isLongClickable基本上仅表示给定控件已分配了OnLongClickListener。

您应该做什么：在每个OnLongClickListener中进行保存（并且其onLongClick将为您提供视图，即ImageView），或者仅在以下情况下进行保存： R.id.saveImage单击，然后在OnLongClickListener中以某种方式告诉您的应用，给定的ImageView被长按，然后R.id.saveImage单击，遍历ImageView长单击的记录列表并执行保存。

如何在多图像视图中处理长按

1 个答案: