Android 13 - Java 中的文件未被刪除？

Question

String path = "/storage/emulated/0/Recordings/Call/Two.mp3";
File file = new File(path);

if(file.exists()) {
File file2 = new File(file.getAbsolutePath());
    file2.delete();
    Toast.makeText(this, "File deleted.", Toast.LENGTH_SHORT).show();
    finish();   
}else 
{
    Toast.makeText(this, "File not exists", Toast.LENGTH_SHORT).show();        
}

文件沒有被刪除。 但是吐司顯示為文件已刪除。我在這個問題上被困了將近 2 天，我們將不勝感激任何幫助。 提前致謝。

我在清單中使用了以下權限。

  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
  <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />

Answer 1

解決方案#1

對於 Android 11 或更高版本，您可以使用MediaStore Api刪除文件（沒有MANAGE_EXTERNAL_Storage ）

在onCreate()中

String path = "/storage/emulated/0/Recordings/Call/Two.mp3";

private ActivityResultLauncher<Intent> deleteResultLauncher = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), result -> {
        if (result.getResultCode() == Activity.RESULT_OK) {
            MediaScannerConnection.scanFile(getApplicationContext(), new String[]{path}, null, (path, uri) -> {
                Log.d("onScanCompleted", uri.getPath());
            });
        }
    });

你刪除 function，

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
        Uri fileUri = Uri.fromFile(new File(path));

        ArrayList<Uri> arrayList = new ArrayList<>();
        arrayList.add(fileUri);

        PendingIntent pendingIntent = MediaStore.createDeleteRequest(getContentResolver(), arrayList);
        deleteResultLauncher.launch(new IntentSenderRequest.Builder(pendingIntent).build().getFillInIntent());
    }

方案二

使用MANAGE_EXTERNAL_Storage ，只需添加MediaScannerConnection

String path = "/storage/emulated/0/Recordings/Call/Two.mp3";
File file = new File(path);

if (file.exists()) {
    File file2 = new File(file.toString());
    file2.delete();
    MediaScannerConnection.scanFile(getApplicationContext(), new String[]{path}, null, (path, uri) -> {
            Log.d("onScanCompleted", uri.getPath());
        });
    Toast.makeText(this, "File deleted.", Toast.LENGTH_SHORT).show();
    finish();
} else {
    Toast.makeText(this, "File not exists", Toast.LENGTH_SHORT).show();
}