在Android Studio中的后台服务内调用通知监听器 [英] Call a notification listener inside a background service in android studio
本文介绍了在Android Studio中的后台服务内调用通知监听器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个正在运行的后台服务和一个通知侦听器.我想从后台服务调用通知侦听器，它似乎不起作用.我的课在下面.1.主要活动启动服务2. MyService是正在运行的后台服务3. NLService是我要在MyService内调用的通知侦听器服务
I have a background service running and a notification listener. I want to call the notification listener from the background service and it does not seem to work. I have below my classes. 1. Main activity starts the service 2.MyService is the background service running 3. NLService is the notification listeners service I want to call inside the MyService
MainActivity.java
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
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
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，但是看不到NLSErvice.任何帮助将不胜感激！
The bacgkround service starts but does not see the NLSErvice. Any help will be much appreciated!
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>
推荐答案
所以我做错了是我试图创建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服务并计算通知数.当您单击报告"时，即使用户已关闭该应用程序，它也会显示所有通知.我在5条通知后添加了用于发出通知的额外代码.
So what I did wrong is that I tried to create 2 services. Instead I only needed one. Here is the code that works. What it simply does is starting the bacgrkound service and counts the notifications.When you click report it shows all the notifications, even if the user has close the app. I have put extra code for making a notification after 5 notifications.
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
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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