应用程序被杀后,广播接收器未调用服务
Posted
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了应用程序被杀后,广播接收器未调用服务相关的知识,希望对你有一定的参考价值。
我的目标是当应用程序处于后台时重新启动服务,甚至通过扫描从主页中杀死。应用程序处于前台和后台时应用程序和服务工作正常,但是当我强行杀死应用程序(从主页扫出)时,服务停止工作。这没关系,但我实现了一个广播接收器来重新启动服务,但它似乎它的(广播接收器)甚至没有调用自己或服务,而应用程序被强行杀死/从主页扫描。
我的设备是:小米Redmi Note 4
我在这里包含了我的代码:
main activity.Java
package com.turzo.servicetest;
import android.app.ActivityManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
public class MainActivity extends AppCompatActivity {
private String TAG = "ServiceTest";
Intent mServiceIntent;
private SensorService mSensorService;
Context ctx;
public Context getCtx() {
return ctx;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ctx = this;
registerRec();
setContentView(R.layout.activity_main);
mSensorService = new SensorService(getCtx());
mServiceIntent = new Intent(getCtx(), mSensorService.getClass());
if (!isMyServiceRunning(mSensorService.getClass())) {
startService(mServiceIntent);
}
}
private boolean isMyServiceRunning(Class<?> serviceClass) {
ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
for (ActivityManager.RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
if (serviceClass.getName().equals(service.service.getClassName())) {
Log.i (TAG, true+"");
return true;
}
}
Log.i (TAG, false+"");
return false;
}
@Override
protected void onDestroy() {
stopService(mServiceIntent);
Log.i(TAG, "onDestroy!");
super.onDestroy();
}
public void registerRec(){
SensorRestarterBroadcastReceiver myreceiver = new SensorRestarterBroadcastReceiver();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
registerReceiver((BroadcastReceiver) myreceiver, intentFilter);
}
}
sensor service.Java
package com.turzo.servicetest;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.ConnectivityManager;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.util.Log;
import java.util.Timer;
import java.util.TimerTask;
public class SensorService extends Service {
public int counter=0;
private String TAG = "ServiceTest";
public SensorService(Context applicationContext) {
super();
Log.i(TAG , "here I am!");
}
public SensorService() {
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
startTimer();
return START_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
Log.i(TAG , "ondestroy!");
Intent broadcastIntent = new Intent("com.turzo.servicetest.ActivityRecognition.RestartSensor");
sendBroadcast(broadcastIntent);
stoptimertask();
}
private Timer timer;
private TimerTask timerTask;
long oldTime=0;
public void startTimer() {
//set a new Timer
timer = new Timer();
//initialize the TimerTask's job
initializeTimerTask();
//schedule the timer, to wake up every 1 second
timer.schedule(timerTask, 1000, 1000); //
}
/**
* it sets the timer to print the counter every x seconds
*/
public void initializeTimerTask() {
timerTask = new TimerTask() {
public void run() {
Log.i(TAG , "in timer ++++ "+ (counter++));
}
};
}
/**
* not needed
*/
public void stoptimertask() {
//stop the timer, if it's not already null
if (timer != null) {
timer.cancel();
timer = null;
}
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
sensor restarter broadcast receiver.Java
package com.turzo.servicetest;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
public class SensorRestarterBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Log.i(SensorRestarterBroadcastReceiver.class.getSimpleName(), "Service Stops! Oooooooooooooppppssssss!!!!");
context.startService(new Intent(context, SensorService.class));
}
}
AndroidManifest.xml中
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.turzo.servicetest">
<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">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service
android:name="com.turzo.servicetest.SensorService"
android:enabled="true" >
</service>
<receiver
android:name="com.turzo.servicetest.SensorRestarterBroadcastReceiver"
android:enabled="true"
android:exported="true"
android:label="RestartServiceWhenStopped">
<intent-filter>
<action android:name="com.turzo.servicetest.ActivityRecognition.RestartSensor"/>
</intent-filter>
</receiver>
</application>
</manifest>
以上是关于应用程序被杀后,广播接收器未调用服务的主要内容,如果未能解决你的问题,请参考以下文章
Android - 在动态注册的广播接收器上出现“无法传递广播”错误
android广播接收器中未调用onReceive()进行静态广播