Android 如果从最近使用的应用程序中删除应用程序，Oreo Receiver 将停止

Question

Receiver 适用于从 4.2 到 8.0 的所有 android 版本。即使应用已从 Recent Apps 中删除，但如果从 Android Oreo 中的 Recent Apps 中删除，它就再也不会触发接收器。

我的 manifest.xml :

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

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

<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.WRITE_SMS" />

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />

<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"
        android:screenOrientation="portrait">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <service
        android:name=".WatchMan"
        android:enabled="true"
        android:exported="true" />

    <receiver
        android:name=".Receiver"
        android:enabled="true"
        android:exported="true">

        <intent-filter>
            <action android:name="android.intent.action.PHONE_STATE" />
        </intent-filter>

    </receiver>


</application>

我的 receiver.java :

public class Receiver extends BroadcastReceiver
{
public String PhoneNumber = "UNKNOWN";

@Override
public void onReceive(Context context, Intent intent)
{

    Log.d("RECEIVER :","CAPTURED THE EVENT.....");

    try
    {
        PhoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
        PhoneNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
        {
             context.startForegroundService(new Intent(context, WatchMan.class));
        }
        else
        {
             context.startService(new Intent(context, WatchMan.class));
        }
    }
    catch (Exception e)
    {
        e.printStackTrace();
        Log.e("RECEIVER EXCEPTION : ", "Exception is : ", e);
    }

}

我想知道我是否在代码中做错了什么？ Android Developers Documentation 要求使用 context 注册接收器运行时。然后我在 Whosebug 上搜索在运行时注册它，但看起来没有合适的线程被接受为答案。即使从 Android Oreo 的 recents 中移除，如何让接收器再次准备好？

提前致谢。

Answer 1

根据 documentation 在 Android 8 中对隐式广播的限制，您不能在清单中使用隐式接收器（尽管有一些例外，但 phone 状态接收器不在这些例外中）

您必须使用前台服务并在您的前台服务而不是清单中注册您的接收器

从清单中删除 phone 状态接收器

在服务的 onCreate 中注册接收器：

   @Override
    public void onCreate() {
        super.onCreate();
        phoneStateReceiver = new PhoneStateReceiver();
        registerReceiver(phoneStateReceiver, new IntentFilter(TelephonyManager.ACTION_PHONE_STATE_CHANGED));
    }

在 onDestroy 中取消注册：

   @Override
    public void onDestroy() {
        unregisterReceiver(phoneStateReceiver);
        super.onDestroy();
    }

向您的服务添加静态方法以启动服务：

// start service even if your app is in stopped condition in android 8+
static void requestStart(@NonNull final Context context, @NonNull final String action){
        final Context appContext = context.getApplicationContext();
        Intent intent = new Intent(appContext, AppService.class);
        intent.setAction(action);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            // this is required to start the service if there is 
            // no foreground process in your app and your app is
            // stopped in android 8 or above
            appContext.startForegroundService(intent);
        } else {
            appContext.startService(intent);
        }
    }

在您的 onStartCommand

中启动前台

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
         if(ACTION_START.equals(intent.getAction()))
           startForeground(ID, notification);
         else if(ACTION_STOP.equals(intent.getAction()))
           stopForeground(true);

         return START_STICKY;
}

Answer 2

我删除了不相关的帖子。我发布最终答案，因为它可能对其他人有帮助。感谢@WIZARD 的帮助。

PHONE_STATE is implicit and will not be triggered on android Oreo or higher. So just place permissions in manifest like :

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.WRITE_SMS" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />

<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"
        android:excludeFromRecents="true">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <service
        android:name=".WatchMan"
        android:enabled="true"
        android:exported="true">
    </service>
    <service
        android:name=".CatchNumbers"
        android:enabled="true"
        android:exported="true">
    </service>

    <receiver
        android:name=".MyReceiver"
        android:enabled="true"
        android:exported="true">

        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
        </intent-filter>

    </receiver>
</application>

从前台服务注册隐式接收器：

public class WatchMan extends Service
{
NotificationManager mNotifyManager;
NotificationCompat.Builder mBuilder;
NotificationChannel notificationChannel;
String NOTIFICATION_CHANNEL_ID = "17";
private boolean running;

private BroadcastReceiver mCallBroadcastReceiver = new BroadcastReceiver()
{
    @Override
    public void onReceive(Context context, Intent intent)
    {
        String PhoneNumber = "UNKNOWN";
        Log.d("RECEIVER :  ","HERE HERE");

        try
        {
            String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);

            if(state == null)
            {
                PhoneNumber = "UNKNOWN";
            }
            else if (state.equals(TelephonyManager.EXTRA_STATE_RINGING))
            {
                PhoneNumber = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
                Log.d("INCOMING ","Incoming number : "+PhoneNumber);
            }
            if(intent.getAction().equals("android.intent.action.NEW_OUTGOING_CALL"))
            {

                PhoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
                Log.d("OUTGOING ","Outgoing number : "+PhoneNumber);

            }


            if(!PhoneNumber.contentEquals("UNKNOWN"))
            {
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
                {
                    context.startForegroundService(new Intent(context, CatchNumbers.class));
                }
                else
                {
                    context.startService(new Intent(context, CatchNumbers.class));
                }
            }



        }
        catch (Exception e)
        {
            e.printStackTrace();
            Log.e("RECEIVER EXCEPTION : ", "Exception is : ", e);
        }
    }
};

public WatchMan() { }

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

    mBuilder = new NotificationCompat.Builder(this, null);

    IntentFilter filterstate = new IntentFilter();
    filterstate.addAction("android.intent.action.NEW_OUTGOING_CALL");
    filterstate.addAction("android.intent.action.PHONE_STATE");
    this.registerReceiver(mCallBroadcastReceiver, filterstate);

    Log.d("RECEIVER : ", "\nCreated....");

    mNotifyManager = (NotificationManager) getApplicationContext().getSystemService(NOTIFICATION_SERVICE);
    mBuilder = new NotificationCompat.Builder(this, null);
    mBuilder.setContentTitle("Insta Promo")
            .setContentText("Insta Promo Is Up..")
            .setTicker("Insta Promo Is Up..")
            .setSmallIcon(R.drawable.ic_launcher_background)
            .setPriority(Notification.PRIORITY_HIGH)
            .setDefaults(Notification.DEFAULT_ALL)
            .setVisibility(Notification.VISIBILITY_PUBLIC)
            .setOngoing(true)
            .setAutoCancel(false);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
    {

        notificationChannel = new NotificationChannel(NOTIFICATION_CHANNEL_ID, "My Notifications", NotificationManager.IMPORTANCE_HIGH);

        // Configure the notification channel.
        notificationChannel.setDescription("Channel description");
        notificationChannel.enableLights(true);
        notificationChannel.setLightColor(Color.RED);
        notificationChannel.setVibrationPattern(new long[]{0, 1000, 500, 1000});
        notificationChannel.enableVibration(true);
        notificationChannel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);
        mNotifyManager.createNotificationChannel(notificationChannel);
    }

    running = true;

    mBuilder.setChannelId(NOTIFICATION_CHANNEL_ID);
    startForeground(17, mBuilder.build());



}

@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
    Log.d("RECEIVER : ", "\nOnStartCommand....");
    new Thread(new Runnable()
    {
        public void run()
        {
            while(running)
            {
                try
                {
                    Log.d("RECEIVER : ", "\nALIVE..");
                    Thread.sleep(10000);
                }
                catch (InterruptedException e)
                {
                    Log.d("RECEIVER : ", "\nThread : InterruptedException in Receiver...");
                    Log.e("RECEIVER : ", "\nException is : ", e);
                }
                catch (Exception e)
                {
                    Log.d("RECEIVER : ", "\nThread : Exception Error in Receiver...");
                    Log.e("RECEIVER : ", "\nException is : ", e);
                }
            }

        }

    }).start();



    return START_STICKY;
}

@Override
public void onDestroy()
{
    this.unregisterReceiver(mCallBroadcastReceiver);
    running = true;
    Log.d("RECEIVER : ", "\nDestroyed....");
    Log.d("RECEIVER : ", "\nWill be created again....");
}

@Override
public IBinder onBind(Intent intent)
{
    // TODO: Return the communication channel to the service.
    throw new UnsupportedOperationException("Not yet implemented");
}

@Override
public void onTaskRemoved(Intent rootIntent)
{
    super.onTaskRemoved(rootIntent);
    Log.d("SERVICE : ", "\nTask Removed....");
}


}

有一些意图操作，如 NEW_OUTGOING_CALL 和 BOOT_COMPLETED，它们被排除在外，可以在接收器中实现并放置在清单中，如：

public class MyReceiver extends BroadcastReceiver
{

@Override
public void onReceive(Context context, Intent intent)
{
    Log.d("INSTA_BOOT : ", "\nBOOT_COMPLETE_EVENT_OF_INSTA....");
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
    {
        context.startForegroundService(new Intent(context, WatchMan.class));
    }
    else
    {
        context.startService(new Intent(context, WatchMan.class));
    }
}
}

因为我想重新注册或说想在 REBOOT 或 BOOT-COMPLETE 时重新启动前台服务

CatchNumbers.java is a simple service which performs operation when receiver triggers perticular actions.

它在每次重启时都运行良好，因为不再需要 android:excludeFromRecents="true"，因为即使用户在 Oreo 上将其从 recents 中删除，它也会像 STICKY 一样重启服务。希望它能帮助像我这样的人..!!

Android 如果从最近使用的应用程序中删除应用程序，Oreo Receiver 将停止

Android Oreo Receiver Stops If Removed App From Recents

java

android

manifest

receiver