保活Service可从两方面考虑:java
一.改变Service自身的方法android
1.提升Service的优先级
app
在AndroidManifest.xml文件中对于intent-filter能够经过android:priority = "1000"这个属性设置最高优先级,1000是最高值,若是数字越小则优先级越低,同时适用于广播。ide
<service android:name="com.dbjtech.acbxt.waiqin.UploadService" android:enabled="true" > <intent-filter android:priority="1000" > <action android:name="com.dbjtech.myservice" /> </intent-filter> </service>
2.在Service即将销毁的时候从新启动
this
能够直接在onDestroy()里startServicecode
@Override public void onDestroy() { Intent sevice = new Intent(this, MainService.class); this.startService(sevice); super.onDestroy(); }
也能够用service +broadcast 方式启动:xml
onDestroy方法里重启service,当service走ondestory的时候,发送一个自定义的广播,当收到广播的时候,从新启动service;进程
<receiver android:name="com.dbjtech.acbxt.waiqin.BootReceiver" > <intent-filter> <action android:name="android.intent.action.BOOT_COMPLETED" /> <action android:name="android.intent.action.USER_PRESENT" /> <action android:name="com.dbjtech.waiqin.destroy" />//这个就是自定义的action </intent-filter> </receiver>
在onDestroy时:事件
@Override public void onDestroy() { stopForeground(true); Intent intent = new Intent("com.dbjtech.waiqin.destroy"); sendBroadcast(intent); super.onDestroy(); }
在BootReceiver里get
public class BootReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { if (intent.getAction().equals("com.dbjtech.waiqin.destroy")) { //TODO //在这里写从新启动service的相关操做 startUploadService(context); } } }
3.onStartCommand方法,返回START_STICKY
@Override public int onStartCommand(Intent intent, int flags, int startId) { flags = START_STICKY; return super.onStartCommand(intent, flags, startId); }
4.提高service进程优先级
在onStartCommand方法内添加以下代码:
Notification notification = new Notification(R.drawable.ic_launcher, getString(R.string.app_name), System.currentTimeMillis()); PendingIntent pendingintent = PendingIntent.getActivity(this, 0, new Intent(this, AppMain.class), 0); notification.setLatestEventInfo(this, "uploadservice", "请保持程序在后台运行", pendingintent); startForeground(0x111, notification);
二.利用系统特性的方法
1.监听系统特殊事件
经过系统的一些广播,好比:手机重启、界面唤醒、应用状态改变等等监听并捕获到,而后判断咱们的Service是否还存活,别忘记加权限啊。
<receiver android:name="com.dbjtech.acbxt.waiqin.BootReceiver" > <intent-filter> <action android:name="android.intent.action.BOOT_COMPLETED" /> <action android:name="android.intent.action.USER_PRESENT" /> <action android:name="android.intent.action.PACKAGE_RESTARTED" /> <action android:name="com.dbjtech.waiqin.destroy" /> </intent-filter> </receiver>
BroadcastReceiver中:
@Override public void onReceive(Context context, Intent intent) { if (Intent.ACTION_BOOT_COMPLETED.equals(intent.getAction())) { System.out.println("手机开机了...."); startUploadService(context); } if (Intent.ACTION_USER_PRESENT.equals(intent.getAction())) { startUploadService(context); } }
2.特殊手机监听特殊推送,例如小米手机注册小米推送