在 android studio 的后台服务中调用通知侦听器

Question

我有一个后台服务运行和一个通知侦听器。我想从后台服务调用通知侦听器，但它似乎不起作用。我的类以下。 1.mainactivity启动服务 2.MyService 是后台服务运行 3. NLService 是我要在 MyService

内部调用的通知监听器服务

MainActivity.java

package com.example.notifyservice;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

import com.example.eg.intentserviceexample.R;

public class MainActivity extends AppCompatActivity {

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

        //setting button click
        findViewById(R.id.btn_start_service).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                //Creating an intent for sending to service
                Intent intent = new Intent(getApplicationContext(), MyService.class);

                intent.putExtra("id", 101);
                intent.putExtra("msg", "hi");

                //starting service
                startService(intent);
            }
        });
    }

    @Override
    protected void onStart() {
        super.onStart();

        //register broadcast receiver for the intent MyTaskStatus
        LocalBroadcastManager.getInstance(this).registerReceiver(MyReceiver, new IntentFilter("MyServiceStatus"));
    }


    //Defining broadcast receiver
    private BroadcastReceiver MyReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {

            String message = intent.getStringExtra("serviceMessage");

            Toast.makeText(MainActivity.this, "Received : " + message, Toast.LENGTH_SHORT).show();
        }
    };




    @Override
    protected void onStop() {
        super.onStop();

        LocalBroadcastManager.getInstance(this).unregisterReceiver(MyReceiver);
    }

}

MyService.java

package com.example.notifyservice;

import android.app.IntentService;
import android.content.BroadcastReceiver;
        import android.content.Context;
        import android.content.Intent;
        import android.support.v4.content.LocalBroadcastManager;
        import android.util.Log;
        import android.widget.TextView;

public class MyService extends IntentService {
    private TextView txtView;
    private NotificationReceiver nReceiver;
    public MyService() {
        super(MyService.class.getName());
    }

    @Override
    protected void onHandleIntent(Intent intent) {


        //retrieving data from the received intent
        int id = intent.getIntExtra("id",0);
        String message = intent.getStringExtra("msg");

        Log.i("Data  ", "id : "+id+" message : "+ message );
        //-----------------------------------------------


        //Do your long running task here

        Intent i = new Intent("com.example.notifyservice.NOTIFICATION_LISTENER_SERVICE_EXAMPLE");

        i.putExtra("command","list");
        sendBroadcast(i);
        //------------------------------------------------

       /* //Broadcasting some data
        Intent myIntent = new Intent("MyServiceStatus");
        myIntent.putExtra("serviceMessage", "Task done");


        // Send broadcast
        LocalBroadcastManager.getInstance(this).sendBroadcast(myIntent);*/

    }
    class NotificationReceiver extends BroadcastReceiver {

        @Override
        public void onReceive(Context context, Intent intent) {
            String temp = intent.getStringExtra("notification_event") + "\n" + txtView.getText();
            txtView.setText(temp);
        }
    }
}

NLService.java

package com.example.notifyservice;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Build;
import android.os.Bundle;
import android.service.notification.NotificationListenerService;
import android.service.notification.StatusBarNotification;
import android.support.annotation.RequiresApi;
import android.util.Log;

@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
public class NLService extends NotificationListenerService {

    private String TAG = this.getClass().getSimpleName();
    private NLServiceReceiver nlservicereciver;
    @Override
    public void onCreate() {
        super.onCreate();
        nlservicereciver = new NLServiceReceiver();
        IntentFilter filter = new IntentFilter();
        filter.addAction("com.example.notify.NOTIFICATION_LISTENER_SERVICE_EXAMPLE");
        registerReceiver(nlservicereciver,filter);
    }

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

    @Override
    public void onNotificationPosted(StatusBarNotification sbn) {

        String pack = sbn.getPackageName();

        String text = "";
        String title = "";
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
            Bundle extras = sbn.getNotification().extras;
            text = extras.getCharSequence("android.text").toString();
            title = extras.getString("android.title");
        }

        Log.i("Package",pack);
        Log.i("Title",title);
        Log.i("Text",text);

    }

    @Override
    public void onNotificationRemoved(StatusBarNotification sbn) {
        Log.i(TAG,"********** onNOtificationRemoved");
        Log.i(TAG,"ID :" + sbn.getId() + "t" + sbn.getNotification().tickerText +"\t" + sbn.getPackageName());
        Intent i = new  Intent("com.example.notify.NOTIFICATION_LISTENER_EXAMPLE");
        i.putExtra("notification_event","onNotificationRemoved :" + sbn.getPackageName() + "\n");

        sendBroadcast(i);
    }

    class NLServiceReceiver extends BroadcastReceiver{

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

           if(intent.getStringExtra("command").equals("list")){
                Intent i1 = new  Intent("com.example.notify.NOTIFICATION_LISTENER_EXAMPLE");
                i1.putExtra("notification_event","=====================");
                sendBroadcast(i1);
                int i=1;
                for (StatusBarNotification sbn : NLService.this.getActiveNotifications()) {
                    Intent i2 = new  Intent("com.example.notify.NOTIFICATION_LISTENER_EXAMPLE");
                    i2.putExtra("notification_event",i +" " + sbn.getPackageName() + "\n");
                    sendBroadcast(i2);
                    i++;
                }
                Intent i3 = new  Intent("com.example.notify.NOTIFICATION_LISTENER_EXAMPLE");
                i3.putExtra("notification_event","===== Notification List ====");
                sendBroadcast(i3);

            }

        }
    }

}

bacgkround 服务启动但没有看到 NLSErvice。任何帮助将不胜感激！

也编辑清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.eg.intentserviceexample">
    <uses-sdk android:minSdkVersion="18"
        android:targetSdkVersion="18"
         />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name="com.example.notifyservice.MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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


        <service
            android:name="com.example.notifyservice.MyService"
            android:exported="false"/>

        <service android:name="com.example.notifyservice.NLService"
            android:label="@string/app_name"
            android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE">
            <intent-filter>
                <action android:name="android.service.notification.NotificationListenerService" />
            </intent-filter>
        </service>

    </application>

</manifest>

Answer 1

您是否在清单中定义了您的服务。对于通知服务，您还需要写入权限。

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

        <service android:name=".NLService"
                 android:label="@string/app_name"
                 android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE">
            <intent-filter>
                <action android:name="android.service.notification.NotificationListenerService" />
            </intent-filter>
        </service>

如果您想在这种情况下显示通知，您还需要编写以下代码：

 NotificationManager nManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
            NotificationCompat.Builder ncomp = new NotificationCompat.Builder(this);
            ncomp.setContentTitle("My Notification");
            ncomp.setContentText("Notification Listener Service Example");
            ncomp.setTicker("Notification Listener Service Example");
            ncomp.setSmallIcon(R.mipmap.ic_launcher);
            ncomp.setAutoCancel(true);
            nManager.notify((int)System.currentTimeMillis(),ncomp.build());

或者您是否提供了对您的应用程序的通知访问权限？转到您的设置并检查是否提供对您的应用程序的通知访问权限？

Answer 2

所以我做错的是我试图创建 2 个服务。相反，我只需要一个。这是有效的代码。它只是启动 bacgrkound 服务并计算 notifications.When 你点击报告它显示所有通知，即使用户关闭了应用程序。我添加了额外的代码，用于在 5 次通知后发出通知。

MainActivity.java
package com.example.notifyservice;

import android.app.NotificationManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.support.v4.app.NotificationCompat;
import android.support.v4.content.LocalBroadcastManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

import java.util.Timer;
import java.util.TimerTask;


public class MainActivity extends AppCompatActivity {

/*
    protected final Timer myTimer = new Timer("MainActivityTimer", false);
*/

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // FIRST OF ALL
        // START SERVICE AS STICKY - BY EXPLICIT INTENT
        // to prevent being started by the system (without the sticky flag)
        Intent intent = new Intent(getApplicationContext(), NLService.class);

        // TODO: to be removed
        intent.putExtra("id", 101);
        intent.putExtra("msg", "hi");

        //starting service


        startService(intent);


        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Intent i = new Intent("android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS");
        startActivity(i);
        //setting button click
        findViewById(R.id.btn_start_service).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                // Ask service (async) for its status (manually after the main activity was paused or closed and missed some NLService's broadcasts)
                // the background service is sticky and the counters(added/removed) are not reset.

                //Creating an intent for sending to service
                //Intent intent = new Intent(getApplicationContext(), MyService.class);
                Intent intent = new Intent(getApplicationContext(), NLService.class);
                intent.putExtra("command", "get_status");
                //starting service
                startService(intent);

            }
        });
    }

    @Override
    protected void onStart() {
        super.onStart();

        // register broadcast receiver for the intent MyTaskStatus
        LocalBroadcastManager.getInstance(this).registerReceiver(MyReceiver, new IntentFilter(NLService.ACTION_STATUS_BROADCAST));


    }


    //Defining broadcast receiver
    private BroadcastReceiver MyReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            Log.i("MainActivity", "Broadcast Recieved: "+intent.getStringExtra("serviceMessage"));
            String message = intent.getStringExtra("serviceMessage");
            Toast.makeText(MainActivity.this, message, Toast.LENGTH_SHORT).show();
        }
    };




    @Override
    protected void onStop() {
        super.onStop();

        LocalBroadcastManager.getInstance(this).unregisterReceiver(MyReceiver);
    }

}

NLService.java

package com.example.notifyservice;

import android.app.IntentService;
import android.app.NotificationManager;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Build;
import android.service.notification.NotificationListenerService;
import android.service.notification.StatusBarNotification;
import android.support.annotation.RequiresApi;
import android.support.v4.app.NotificationCompat;
import android.support.v4.content.LocalBroadcastManager;
import android.util.Log;

// @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR2)
public class NLService extends NotificationListenerService {

    public static final String ACTION_STATUS_BROADCAST = "com.example.notifyservice.NLService_Status";

    private String TAG = this.getClass().getSimpleName();
    private NLServiceReceiver nlservicereciver;

    /**
     * The number of notifications added (since the service started)
     */
    private int nAdded=0;
    /**
     * The number of notifications removed (since the service started)
     */
    private int nRemoved=0;
    int temp = 5;

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        //retrieving data from the received intent
        if(intent.hasExtra("command")) {
            Log.i("NLService", "Started for command '"+intent.getStringExtra("command"));
            broadcastStatus();
        } else if(intent.hasExtra("id")) {
            int id = intent.getIntExtra("id", 0);
            String message = intent.getStringExtra("msg");
            Log.i("NLService", "Requested to start explicitly - id : " + id + " message : " + message);
        }
        super.onStartCommand(intent, flags, startId);

        // NOTE: We return STICKY to prevent the automatic service termination
        return START_STICKY;
    }

    private void broadcastStatus() {
        Log.i("NLService", "Broadcasting status added("+nAdded+")/removed("+nRemoved+")");
        Intent i1 = new  Intent(ACTION_STATUS_BROADCAST);
        i1.putExtra("serviceMessage","Added: "+nAdded+" | Removed: "+nRemoved);
        LocalBroadcastManager.getInstance(this).sendBroadcast(i1);
        // sendBroadcast(i1);

    }

    @Override
    public void onCreate() {
        super.onCreate();
        Log.i("NLService", "NLService created!");
        nlservicereciver = new NLServiceReceiver();
        IntentFilter filter = new IntentFilter();
        filter.addAction("com.example.notifyservice.NOTIFICATION_LISTENER_SERVICE_EXAMPLE");
        registerReceiver(nlservicereciver,filter);
        Log.i("NLService", "NLService created!");
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        unregisterReceiver(nlservicereciver);
        Log.i("NLService", "NLService destroyed!");
    }

    /* > API 21
    @Override
    public void onListenerDisconnected() {
        super.onListenerDisconnected();
        Log.w("NLService", "Notification listener DISCONNECTED from the notification service! Scheduling a reconnect...");
        // requestRebind(new ComponentName(this.getPackageName(), this.getClass().getCanonicalName()));
    }

    @Override
    public void onListenerConnected() {
        super.onListenerConnected();
        Log.w("NLService", "Notification listener connected with the notification service!");
    }
    */

    @Override
    public void onNotificationPosted(StatusBarNotification sbn) {

        Log.i(TAG,"**********  onNotificationPosted");
        Log.i(TAG,"ID :" + sbn.getId() + "t" + sbn.getNotification().tickerText + "\t" + sbn.getPackageName());
        Intent i = new  Intent("com.example.notify.NOTIFICATION_LISTENER_EXAMPLE");
        i.putExtra("notification_event","onNotificationPosted :" + sbn.getPackageName() + "\n");
        sendBroadcast(i);

        nAdded++;

        if (nAdded == temp) {
            System.out.println("reached" + temp);
            temp = temp + 5;
            System.out.println(temp);
            NotificationManager nManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
            NotificationCompat.Builder ncomp = new NotificationCompat.Builder(this);
            ncomp.setContentTitle("Notification");
            ncomp.setContentText("Notification Listener Service Example");
            ncomp.setTicker("Notification Listener Service Example");
            ncomp.setSmallIcon(R.mipmap.ic_launcher);
            ncomp.setAutoCancel(true);
            nManager.notify((int)System.currentTimeMillis(),ncomp.build());
        }
        broadcastStatus();
    }

    @Override
    public void onNotificationRemoved(StatusBarNotification sbn) {
        Log.i(TAG,"********** onNOtificationRemoved");
        Log.i(TAG,"ID :" + sbn.getId() + "t" + sbn.getNotification().tickerText +"\t" + sbn.getPackageName());
        Intent i = new  Intent("com.example.notify.NOTIFICATION_LISTENER_EXAMPLE");
        i.putExtra("notification_event","onNotificationRemoved :" + sbn.getPackageName() + "\n");

        sendBroadcast(i);

        nRemoved++;
        broadcastStatus();
    }

    class NLServiceReceiver extends BroadcastReceiver {

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

            if(intent.getStringExtra("command").equals("list")){
                Intent i1 = new  Intent("com.example.notify.NOTIFICATION_LISTENER_EXAMPLE");
                i1.putExtra("notification_event","=====================");
                sendBroadcast(i1);
                int i=1;
                for (StatusBarNotification sbn : NLService.this.getActiveNotifications()) {
                    Intent i2 = new  Intent("com.example.notify.NOTIFICATION_LISTENER_EXAMPLE");
                    i2.putExtra("notification_event",i +" " + sbn.getPackageName() + "\n");
                    sendBroadcast(i2);
                    i++;
                }
                Intent i3 = new  Intent("com.example.notify.NOTIFICATION_LISTENER_EXAMPLE");
                i3.putExtra("notification_event","===== Notification List ====");
                sendBroadcast(i3);

            }

        }
    }

}

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