无法切换闹钟和提醒权限

Question

我有设置闹钟的应用程序。我使用此代码来请求用户许可：

Intent intent = new Intent(
"android.settings.REQUEST_SCHEDULE_EXACT_ALARM",
 Uri.parse("package:"+ getPackageName())
);
 someActivityResultLauncher.launch(intent);

在清单中我添加了权限：

<uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM"/>

当我单击启动意图的按钮时，我可以看到：

但是我无法在获得许可的情况下切换按钮，我不知道为什么。

Answer 1

当请求权限时，它将返回

isGranted = true

AndroidManifest.xml

。

<uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM"/>

实际上，目的是

Settings.ACTION_REQUEST_SCHEDULE_EXACT_ALARM

：

ActivityResultLauncher<Intent> startActivityForResult = registerForActivityResult(
        new ActivityResultContracts.StartActivityForResult(), (ActivityResult result) -> {
            if (result.getResultCode() == RESULT_OK) {}
        });

@RequiresApi(api = Build.VERSION_CODES.S_V2)
void hasPermission(@NonNull Context context) {
    AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S_V2) {

        // it depends on the manifest permission, just alike the toggle does.
        if (! alarmManager.canScheduleExactAlarms()) {

        }

        // one can only disable the permission, when the manifest requested it.
        startActivityForResult.launch(new Intent(
                Settings.ACTION_REQUEST_SCHEDULE_EXACT_ALARM,
                Uri.parse("package:" + getPackageName())
        ));
    }
}

收听广播动作

AlarmManager.ACTION_SCHEDULE_EXACT_ALARM_PERMISSION_STATE_CHANGED

。

当目标 API USE_EXACT_ALARM

 以后，还有权限 

33。

查看行为变化：确切的警报权限。

Answer 2

// Button click for check permission 
 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S_V2) {
                        hasPermission(AlarmActivity.this);
                    }
// 2 Number code

 @RequiresApi(api = Build.VERSION_CODES.S_V2)
    void hasPermission(@NonNull Context context) {
        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S_V2) {

            // it depends on the manifest permission, just alike the toggle does.
            if (!alarmManager.canScheduleExactAlarms()) {
                startActivityForResult.launch(new Intent(
                        Settings.ACTION_REQUEST_SCHEDULE_EXACT_ALARM,
                        Uri.parse("package:" + getPackageName())
                ));
            }

            // one can only disable the permission, when the manifest requested it.

        }
    } 
// 3 Number code 

ActivityResultLauncher<Intent> startActivityForResult = registerForActivityResult(
            new ActivityResultContracts.StartActivityForResult(), (ActivityResult result) -> {
                if (result.getResultCode() == RESULT_OK) {

                }
            });