java - 如果从最近使用的应用程序中删除应用程序，Android Oreo 接收器将停止

Question

Receiver 适用于从 4.2 到 8.0 的所有 Android 版本。即使应用程序已从最近的应用程序中删除，但如果从 Android Oreo 中的最近的应用程序中删除，它就永远不会再次触发接收器。

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>

<小时/>

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);
    }

}

我想知道我的代码是否有错误？ Android 开发人员文档 要求使用 context 注册接收器运行时。然后我在 stackoverflow 上搜索在运行时注册它，但看起来没有正确的线程被接受作为答案。即使从 Android Oreo 的 recents 中删除，如何才能使接收器再次准备就绪？

提前感谢您。

Answer 1

我已经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。

<小时/>

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

<小时/>

<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>

<小时/>

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....");
}


}

<小时/>

有一些 Intent 操作，例如 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 list 中，例如:

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重新启动或启动完成时重新启动前台服务

<小时/>

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

<小时/>

它在每次重新启动时都能正常工作，并且不再需要 android:excludeFromRecents="true" ，即使用户将其从 Oreo 上的 recents 中删除，它也会重新启动服务，因为它是 STICKY。希望它能帮助像我这样的人..!!