最近做了一個監聽電話并錄音的小例子，而保證它在后臺運行不被殺確實不容易。

首先在主service中：

service中重寫onStartCommand方法，這個方法有三個返回值，?START_STICKY是service被kill掉后自動

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;// 判斷是否是Broadcast發來的intentif (!("Protect".equals(intent.getAction()))) {System.out.println("action" + intent.getAction());this.outGoingNum = intent.getStringExtra("outGoingNums");// 將耗時操作放到子線程中 backGroundExecution();}return super.onStartCommand(intent, flag, startId);}

?在onDestroy()方法中，啟動當前服務，同時再啟動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();}

新建一個ProtectService服務 ，同時再建一個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);
//相互關聯Intent ins = new Intent(this, ProtectService.class);startService(ins);super.onDestroy();}

?ProtectService中用alarmManager來不斷觸發UserPresentReceive?

private void proctectServiceInBack() {/*** 指定時間間隔 重復喚醒alarm*/AlarmManager alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);// 在合適的時間醒來int alarmType = AlarmManager.RTC_WAKEUP;// 設置時間長度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 監聽系統廣播：

Intent.ACTION_TIME_TICK，這個廣播每分鐘發送一次，我們可以每分鐘檢查一次Service的運行狀態，如果已經被結束了，就重新啟動Service。
同時監聽 ? ?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);}//開機自啟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);}}}

另外建再建一個broadcastReceive來監聽電話狀態

if (Intent.ACTION_NEW_OUTGOING_CALL.equals(intent.getAction())) {//取得號碼String outGoingNum = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);Intent in=new Intent(content,ServicePhone.class);in.setAction(".b2");//將號碼傳給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" ?提高不被殺死的幾率 ??

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

?將protectService另起一個進程

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

監聽系統廣播 ?設置android:priority 提高優先權

<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>

?

轉載于:https://www.cnblogs.com/mydomainlistentome/p/4692795.html

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