Android-为服务实现startForeground？

我首先要完全填写2英镑。这是一个示例项目，演示the3的用法。

在您的主要活动中，使用以下代码启动该服务：

Intent i = new Intent(context, MyService.class); 
context.startService(i);

然后在ѭ5的服务中，您将构建通知并将其设置为前台，如下所示：

Intent notificationIntent = new Intent(this, MainActivity.class);

PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
                notificationIntent, 0);

Notification notification = new NotificationCompat.Builder(this)
                .setSmallIcon(R.mipmap.app_icon)
                .setContentTitle(\"My Awesome App\")
                .setContentText(\"Doing some work...\")
                .setContentIntent(pendingIntent).build();

startForeground(1337, notification);

很缴

这是我将服务设置为前台的代码：

private void runAsForeground(){
    Intent notificationIntent = new Intent(this, RecorderMainActivity.class);
    PendingIntent pendingIntent=PendingIntent.getActivity(this, 0,
            notificationIntent, Intent.FLAG_ACTIVITY_NEW_TASK);

    Notification notification=new NotificationCompat.Builder(this)
                                .setSmallIcon(R.drawable.ic_launcher)
                                .setContentText(getString(R.string.isRecording))
                                .setContentIntent(pendingIntent).build();

    startForeground(NOTIFICATION_ID, notification);

}

我需要使用PendingIntent构建通知，以便可以从通知开始我的主要活动。要删除通知，只需调用stopForeground（true）;即可。在onStartCommand（）中调用它。请参考我的代码：https://github.com/bearstand/greyparrot/blob/master/src/com/xiong/richard/greyparrot/Mp3Recorder.java

漂汀拦

Oreo 8.1解决方案由于最新版本的Android频道ID无效，我遇到了诸如RemoteServiceException之类的问题。这就是我解决的方法：活动：

override fun onCreate(savedInstanceState: Bundle?) {
    val intent = Intent(this, BackgroundService::class.java)

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        startForegroundService(intent)
    } else {
        startService(intent)
    }
}

BackgroundService：

override fun onCreate() {
    super.onCreate()
    startForeground()
}

private fun startForeground() {

    val service = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
    val channelId =
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                createNotificationChannel()
            } else {
                // If earlier version channel ID is not used
                // https://developer.android.com/reference/android/support/v4/app/NotificationCompat.Builder.html#NotificationCompat.Builder(android.content.Context)
                \"\"
            }

    val notificationBuilder = NotificationCompat.Builder(this, channelId )
    val notification = notificationBuilder.setOngoing(true)
            .setSmallIcon(R.mipmap.ic_launcher)
            .setPriority(PRIORITY_MIN)
            .setCategory(Notification.CATEGORY_SERVICE)
            .build()
    startForeground(101, notification)
}


@RequiresApi(Build.VERSION_CODES.O)
private fun createNotificationChannel(): String{
    val channelId = \"my_service\"
    val channelName = \"My Background Service\"
    val chan = NotificationChannel(channelId,
            channelName, NotificationManager.IMPORTANCE_HIGH)
    chan.lightColor = Color.BLUE
    chan.importance = NotificationManager.IMPORTANCE_NONE
    chan.lockscreenVisibility = Notification.VISIBILITY_PRIVATE
    val service = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
    service.createNotificationChannel(chan)
    return channelId
}

相当于Java

public class YourService extends Service {

    // Constants
    private static final int ID_SERVICE = 101;

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        super.onStartCommand(intent, flags, startId);
        return START_STICKY;
    }

    @Override
    public void onCreate() {
        super.onCreate();

        // do stuff like register for BroadcastReceiver, etc.

        // Create the Foreground Service
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        String channelId = Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ? createNotificationChannel(notificationManager) : \"\";
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, channelId);
        Notification notification = notificationBuilder.setOngoing(true)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setPriority(PRIORITY_MIN)
                .setCategory(NotificationCompat.CATEGORY_SERVICE)
                .build();

        startForeground(ID_SERVICE, notification);
    }

    @RequiresApi(Build.VERSION_CODES.O)
    private String createNotificationChannel(NotificationManager notificationManager){
        String channelId = \"my_service_channelid\";
        String channelName = \"My Foreground Service\";
        NotificationChannel channel = new NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_HIGH);
        // omitted the LED color
        channel.setImportance(NotificationManager.IMPORTANCE_NONE);
        channel.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
        notificationManager.createNotificationChannel(channel);
        return channelId;
    }
}

矾醒忻

除了RAWA答案，此代码的安全性：

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    startForegroundService(intent)
} else {
    startService(intent)
}

您可以更改为：

ContextCompat.startForegroundService(context, yourIntent);

如果您要查看此方法的内部，则可以看到该方法为您完成了所有检查工作。

苦诫

如果要使IntentService成为前台服务那么你应该像这样覆盖ѭ13

Override
protected void onHandleIntent(@Nullable Intent intent) {


    startForeground(FOREGROUND_ID,getNotification());     //<-- Makes Foreground

   // Do something

    stopForeground(true);                                // <-- Makes it again a normal Service                         

}

如何发出通知？简单。这是getNotification()方法

public Notification getNotification()
{

    Intent intent = new Intent(this, SecondActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(this,0,intent,0);


    NotificationCompat.Builder foregroundNotification = new NotificationCompat.Builder(this);
    foregroundNotification.setOngoing(true);

    foregroundNotification.setContentTitle(\"MY Foreground Notification\")
            .setContentText(\"This is the first foreground notification Peace\")
            .setSmallIcon(android.R.drawable.ic_btn_speak_now)
            .setContentIntent(pendingIntent);


    return foregroundNotification.build();
}

更深刻的理解当服务成为前台服务时会发生什么有时候是这样的什么是前台服务？前台服务，确保用户主动意识到后台发生了什么通过提供通知。（最重要的）在内存不足时不会被系统杀死前台服务的用例在Music App中实现歌曲下载功能

凰葱崎济邯

在onCreate（）中为\“ OS> = Build.VERSION_CODES.O \”添加给定的代码服务类

@Override
public void onCreate(){
    super.onCreate();

     .................................
     .................................

    //For creating the Foreground Service
    NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    String channelId = Build.VERSION.SDK_INT >= Build.VERSION_CODES.O ? getNotificationChannel(notificationManager) : \"\";
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, channelId);
    Notification notification = notificationBuilder.setOngoing(true)
            .setSmallIcon(R.mipmap.ic_launcher)
           // .setPriority(PRIORITY_MIN)
            .setCategory(NotificationCompat.CATEGORY_SERVICE)
            .build();

    startForeground(110, notification);
}



@RequiresApi(Build.VERSION_CODES.O)
private String getNotificationChannel(NotificationManager notificationManager){
    String channelId = \"channelid\";
    String channelName = getResources().getString(R.string.app_name);
    NotificationChannel channel = new NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_HIGH);
    channel.setImportance(NotificationManager.IMPORTANCE_NONE);
    channel.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
    notificationManager.createNotificationChannel(channel);
    return channelId;
}

在清单文件中添加此权限：

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

梦砍废么

通过使用处理服务的startCommand的意图。

 stopForeground(true)

该调用将服务从前台状态中删除，如果需要更多内存，则可以将其终止。这不会停止服务运行。为此，您需要调用stopSelf（）或相关方法。传递值true或false，指示是否要删除通知。

val ACTION_STOP_SERVICE = \"stop_service\"
val NOTIFICATION_ID_SERVICE = 1
...  
override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
    super.onStartCommand(intent, flags, startId)
    if (ACTION_STOP_SERVICE == intent.action) {
        stopForeground(true)
        stopSelf()
    } else {
        //Start your task

        //Send forground notification that a service will run in background.
        sendServiceNotification(this)
    }
    return Service.START_NOT_STICKY
}

stopSelf（）调用销毁时处理任务。

override fun onDestroy() {
    super.onDestroy()
    //Stop whatever you started
}

创建一个通知以使服务保持在前台运行。

//This is from Util class so as not to cloud your service
fun sendServiceNotification(myService: Service) {
    val notificationTitle = \"Service running\"
    val notificationContent = \"<My app> is using <service name> \"
    val actionButtonText = \"Stop\"
    //Check android version and create channel for Android O and above
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        //You can do this on your own
        //createNotificationChannel(CHANNEL_ID_SERVICE)
    }
    //Build notification
    val notificationBuilder = NotificationCompat.Builder(applicationContext, CHANNEL_ID_SERVICE)
    notificationBuilder.setAutoCancel(true)
            .setDefaults(NotificationCompat.DEFAULT_ALL)
            .setWhen(System.currentTimeMillis())
            .setSmallIcon(R.drawable.ic_location)
            .setContentTitle(notificationTitle)
            .setContentText(notificationContent)
            .setVibrate(null)
    //Add stop button on notification
    val pStopSelf = createStopButtonIntent(myService)
    notificationBuilder.addAction(R.drawable.ic_location, actionButtonText, pStopSelf)
    //Build notification
    val notificationManagerCompact = NotificationManagerCompat.from(applicationContext)
    notificationManagerCompact.notify(NOTIFICATION_ID_SERVICE, notificationBuilder.build())
    val notification = notificationBuilder.build()
    //Start notification in foreground to let user know which service is running.
    myService.startForeground(NOTIFICATION_ID_SERVICE, notification)
    //Send notification
    notificationManagerCompact.notify(NOTIFICATION_ID_SERVICE, notification)
}

在通知上提供一个停止按钮，以在用户需要时停止服务。

/**
 * Function to create stop button intent to stop the service.
 */
private fun createStopButtonIntent(myService: Service): PendingIntent? {
    val stopSelf = Intent(applicationContext, MyService::class.java)
    stopSelf.action = ACTION_STOP_SERVICE
    return PendingIntent.getService(myService, 0,
            stopSelf, PendingIntent.FLAG_CANCEL_CURRENT)
}

诞胃

注意：如果您的应用程序的目标是API级别26或更高级别，则除非应用程序本身位于前台，否则系统会限制使用或创建后台服务。如果应用程序需要创建前台服务，则该应用程序应调用startForegroundService()。该方法创建了后台服务，但是该方法向系统发出信号，表明该服务会将自身提升到前台。创建服务后，该服务必须调用其“ 25”

春驹晴陪

就我而言，这完全不一样，因为我没有参加在奥利奥（Oreo）启动该服务的活动。以下是我用来解决此前台服务问题的步骤-

public class SocketService extends Service {
    private String TAG = this.getClass().getSimpleName();

    @Override
    public void onCreate() {
        Log.d(TAG, \"Inside onCreate() API\");
        if (Build.VERSION.SDK_INT >= 26) {
            NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this);
            mBuilder.setSmallIcon(R.drawable.ic_launcher);
            mBuilder.setContentTitle(\"Notification Alert, Click Me!\");
            mBuilder.setContentText(\"Hi, This is Android Notification Detail!\");
            NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

            // notificationID allows you to update the notification later on.
            mNotificationManager.notify(100, mBuilder.build());
            startForeground(100, mBuilder.mNotification);
        }
        Toast.makeText(getApplicationContext(), \"inside onCreate()\", Toast.LENGTH_LONG).show();
    }


    @Override
    public int onStartCommand(Intent resultIntent, int resultCode, int startId) {
        Log.d(TAG, \"inside onStartCommand() API\");

        return startId;
    }


    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.d(TAG, \"inside onDestroy() API\");

    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }
}

在启动此服务之后，我在cmd下面触发了- adb -s \“ + serial_id + \” shell是startforegroundservice -n com.test.socket.sample / .SocketService 因此，这可以帮助我在不使用Oreo设备进行活动的情况下开始服务：)

Android-为服务实现startForeground？

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发起人

service

android

android_service

问题状态

Android-为服务实现startForeground？

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10 个回复

发起人

service

android

android_service

问题状态