android - 如何在 Android 10 Scoped Storage 中删除图像(Mediastore 条目和文件)

Question

当我尝试删除已由我的应用贡献/拥有的图像时，可以轻松删除它。但是对于我的应用程序不拥有的图片文件夹中的共享媒体，我通过捕获 RecoverableSecurityException 向用户显示提示。 .但即使在 之后允许 ，我无法删除该特定图像文件。
这是我正在使用的代码，请指出我做错了什么。

删除后图像不会出现在图库或我的应用程序中，但它会保留在文件管理器中，并在手机重新启动后重新出现在图库中(我猜只有 MediaStore 条目被删除)

该代码适用于 Android 11 设备。

来自 startIntentSenderForResult(intentSender, 12, null, 0, 0, 0, null); 的结果是 RESULT_OK

获取文件:(此代码在我的 Activity 中)

   try {
            String DIRECTORY_NAME = "%Pictures/App_Name%";
            String selection = MediaStore.MediaColumns.RELATIVE_PATH + " like ? ";
            String[] selectionArgs = new String[]{DIRECTORY_NAME};
            ContentResolver contentResolver = this.getContentResolver();
            Cursor cursor = contentResolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, selection, selectionArgs, null);

            while(cursor.moveToNext()){
                long id = cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID));
                Uri contentUri = ContentUris.withAppendedId(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, id);

                uriArrayList.add(contentUri);

            }
            cursor.close();
        }
        catch (Exception e){
            e.printStackTrace();
        }

删除图像文件:(此代码在我的适配器类中)

    try {
    ContentResolver contentResolver = context.getContentResolver();
    cachedUri = f; //f is Uri 
    contentResolver.delete(f, null, null);
}catch (SecurityException securityException) {

    RecoverableSecurityException recoverableSecurityException;
    if (securityException instanceof RecoverableSecurityException) {
        recoverableSecurityException =
                (RecoverableSecurityException) securityException;
    } else {
        throw new RuntimeException(
                securityException.getMessage(), securityException);
    }
  
    IntentSender intentSender = recoverableSecurityException.getUserAction()
            .getActionIntent().getIntentSender();
    try {
        resultInterface.onResultTaken(intentSender, cachedUri); //Giving a call to the activity that implements the interface

    } catch (Exception e) {
        e.printStackTrace();
    }
}

提示用户(在我的 Activity 中获取 onActivityResult):

public class SomeActivity extends AppCompatActivity implements ResultTakenListener{

protected void onCreate(){ 
...}

@Override
public void onResultTaken(IntentSender intentSender, Uri uri) throws IntentSender.SendIntentException {
    cacheduri = uri;
    startIntentSenderForResult(intentSender, 12, null, 0, 0, 0, null);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(requestCode == 12){
    Log.d("Result Code is-->", String.valueOf(resultCode)); //This gives RESULT_OK
        if(resultCode == RESULT_OK){
            ContentResolver contentResolver = this.getContentResolver();
            contentResolver.delete(cacheduri, null, null);
    
        }
    }
}}

Answer 1

我尚未对其进行测试，但我认为您需要在处理低于 Q 的构建时集成自定义行为。

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
                
         //your existing code that seems to work above Q
            } else {
                String docsDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).toString();
                File file = new File(docsDir, "fileName.jpg");
                if(file.exists());
                file.delete();
            }