让后台服务不被杀———电话录音

最近做了一个监听电话并录音的小例子，而保证它在后台运行不被杀确实不容易。

首先在主service中：

service中重写onStartCommand方法，这个方法有三个返回值， START_STICKY是service被kill掉后自动

public int onStartCommand(Intent intent, int flags, int startId) {IntentFilter filter=new IntentFilter();filter.addAction(Intent.ACTION_TIME_TICK);UserPresentReceive userReceive = new UserPresentReceive();registerReceiver(userReceive,filter);int flag = START_STICKY;// 判断是否是Broadcast发来的intentif (!("Protect".equals(intent.getAction()))) {System.out.println("action" + intent.getAction());this.outGoingNum = intent.getStringExtra("outGoingNums");// 将耗时操作放到子线程中 backGroundExecution();}return super.onStartCommand(intent, flag, startId);}

 在onDestroy()方法中，启动当前服务，同时再启动protectService（）

public void onDestroy() {System.out.println("ServicePhone_onDestroy");Intent ins = new Intent(this, ServicePhone.class);ins.setAction("Protect");startService(ins);
Intent in = new Intent(this, ProtectService.class);startService(in);super.onDestroy();}

新建一个ProtectService服务 ，同时再建一个broadcastReceive 

public int onStartCommand(Intent intent, int flags, int startId) {Intent ins = new Intent(this, ServicePhone.class);ins.setAction("Protect");startService(ins);flags = START_STICKY;return super.onStartCommand(intent, flags, startId);}public void onDestroy() {Intent in = new Intent(this, ServicePhone.class);in.setAction("Protect");startService(in);
//相互关联Intent ins = new Intent(this, ProtectService.class);startService(ins);super.onDestroy();}

 ProtectService中用alarmManager来不断触发UserPresentReceive 

private void proctectServiceInBack() {/*** 指定时间间隔 重复唤醒alarm*/AlarmManager alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);// 在合适的时间醒来int alarmType = AlarmManager.RTC_WAKEUP;// 设置时间长度long timeOrLengthofWait = 150;long timeOrLengthofWaits=20000;Intent intent = new Intent(getApplicationContext(),UserPresentReceive.class);intent.setAction("protect");PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0,intent, 0);alarmManager.setRepeating(alarmType, timeOrLengthofWait,timeOrLengthofWaits, alarmIntent);}

在UserPresentReceive 监听系统广播：

Intent.ACTION_TIME_TICK，这个广播每分钟发送一次，我们可以每分钟检查一次Service的运行状态，如果已经被结束了，就重新启动Service。
同时监听    ACTION_BOOT_COMPLETED   

public void onReceive(Context content, Intent intent) {System.out.println("UserPresentReceive");if(Intent.ACTION_TIME_TICK.equals(intent.getAction()) ){Intent in=new Intent(content, ProtectService.class);content.startService(in);}else if(Intent.ACTION_BUG_REPORT.equals(intent.getAction())){Intent in=new Intent(content, ProtectService.class);content.startService(in);}else{Intent in=new Intent(content, ProtectService.class);content.startService(in);}//开机自启if(Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())){Intent in=new Intent(content,ServicePhone.class);in.setAction("Protect");content.startService(in);} else{Intent in=new Intent(content, ServicePhone.class);in.setAction("Protect");content.startService(in);}}}

另外建再建一个broadcastReceive来监听电话状态

if (Intent.ACTION_NEW_OUTGOING_CALL.equals(intent.getAction())) {//取得号码String outGoingNum = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);Intent in=new Intent(content,ServicePhone.class);in.setAction(".b2");//将号码传给servicein.putExtra("outGoingNums", outGoingNum);content.startService(in);} else{Intent in=new Intent(content, ServicePhone.class);in.setAction(".b3");content.startService(in);}}

manifest.xml    application中可以加  android:persistent="true"  提高不被杀死的几率   

<applicationandroid:allowBackup="true"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:persistent="true"android:theme="@style/AppTheme" >

 将protectService另起一个进程

<service android:process=":protect"android:name="com.example.phonelisten.ProtectService"android:enabled="true" ></service>

监听系统广播  设置android:priority 提高优先权

<receiver android:name="com.example.phonelisten.ReceivePhone" ><intent-filter android:priority="1000" ><action android:name="android.intent.action.TIME_TICK" /><action android:name="android.intent.action.PHONE_STATE" /><action android:name="android.intent.action.BOOT_COMPLETED" /><action android:name="android.intent.action.NEW_OUTGOING_CALL" /></intent-filter></receiver><receiver android:name="com.example.phonelisten.UserPresentReceive" ><intent-filter android:priority="999" ><action android:name="android.intent.action.BOOT_COMPLETED" /><action android:name="android.intent.action.TIME_TICK" /><action android:name="android.intent.action.BUG_REPORT" /><action android:name="android.intent.action.USER_PRESENT" /><action android:name="android.media.RINGER_MODE_CHANGED" /></intent-filter></receiver>

 

转载于:https://www.cnblogs.com/mydomainlistentome/p/4692795.html

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