Question

在Android Oreo中，我正在尝试在已知的未来时间安排通知。我写了一小段代码来测试是否可以在一个小时内关闭应用程序时安排通知。当我尝试执行此操作时，没有任何反应。我非常感谢您的帮助。

public class MainActivity extends AppCompatActivity {
private NotificationManager manager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    NotificationChannel notificationChannel = new NotificationChannel("default",
            "primary", NotificationManager.IMPORTANCE_DEFAULT);
    manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    manager.createNotificationChannel(notificationChannel);
    Intent notifyIntent = new Intent(this, MyReceiver.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 1, notifyIntent, PendingIntent.FLAG_UPDATE_CURRENT);
    AlarmManager alarmManager = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
    long milisInFuture = 1000 * 60 * 60;
    alarmManager.set(AlarmManager.RTC_WAKEUP, milisInFuture, pendingIntent);
}

public class MyNewIntentService extends JobIntentService {
    @Override
    protected void onHandleWork(@NonNull Intent intent) {
        Notification notification = new Notification.Builder(getApplicationContext(), "default")
                .setContentTitle("title")
                .setContentText("body")
                .setSmallIcon(android.R.drawable.stat_notify_chat)
                .setAutoCancel(true)
                .build();
        manager.notify(123, notification);
    }
}

public class MyReceiver extends BroadcastReceiver {
    public MyReceiver() {
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        Intent intent1 = new Intent(context, MyNewIntentService.class);
        context.startService(intent1);
    }
}
}

如果有帮助，这是清单。

<?xml version="1.0" encoding="utf-8"?>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <service
        android:name=".MainActivity$MyNewIntentService"
        android:permission="android.permission.BIND_JOB_SERVICE"></service>
</application>
</manifest>

Answer 1

更新：

不要忘记将接收者添加到清单xml文件中。 该问题：

在应用程序标记内添加AndroidManifest.xml：

<receiver android:name=".MyReceiver" />

示例： 我保留了这个示例，它更新了Broadcast Receiver类的通知。

创建如图所示的广播接收器类（不要忘记将接收器添加到清单xml文件中）

public class NotificationUpdate extends BroadcastReceiver {
    @RequiresApi(api = Build.VERSION_CODES.O)
    @Override
    public void onReceive(Context context, Intent intent) {
        //NEED A RESCHEDULE?
        updateNotification(context);
    }

    @RequiresApi(api = Build.VERSION_CODES.O)
    private void updateNotification(Context context){
        Notification notification = new Notification.Builder(context.getApplicationContext(), "default")
                .setContentTitle("title")
                .setContentText("body")
                .setSmallIcon(android.R.drawable.stat_notify_chat)
                .setAutoCancel(true)
                .build();
        NotificationManager manager=(NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
        if(manager!=null) manager.notify(123, notification);
    }
}

来自活动的呼叫示例：

public class MainActivity extends AppCompatActivity {

    final long intervalPeriod=60*1000;
    AlarmManager mAlarmManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        NotificationChannel notificationChannel = null;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            notificationChannel = new NotificationChannel("default",
                    "primary", NotificationManager.IMPORTANCE_DEFAULT);

            NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            if (manager != null) manager.createNotificationChannel(notificationChannel);

            mAlarmManager=(AlarmManager)getApplicationContext().getSystemService(ALARM_SERVICE);
            PendingIntent intent=PendingIntent.getBroadcast(getApplicationContext(),1234,
                    new Intent(getApplicationContext(),NotificationUpdate.class),0);

            mAlarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+intervalPeriod, intent);

        }
    }

Oreo在一小时内安排通知

1 个答案: