1、守护进程：一个在后台运行并且不受任何终端控制的进程。可以用来给其他应用拉起，保活。
import android.app.Service;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Handler;
import android.os.IBinder;
import android.util.Log;
public class AppWatcherService extends Service {
static final String TAG = "AppWatcherService";
private final static boolean DEBUG = "eng".equals(Build.TYPE) || "userdebug".equals(Build.TYPE);
private static final int RESTART_BIND_INTERVAL = 1000;
private static final int MAX_RETRY_COUNT = 10;
private static final String APP_PACKAGE_NAME = "com.android.app";
private static final String APP_INTERFACE_NAME = "com.android.app.IRegisterReceiverService";
private static final String APP_SERVICE_NAME = "com.android.app.RegisterReceiverService";
private Context mContext;
private Handler mHandler = new Handler();
private int mBindRetryCount = 0;
private Runnable mRebindFunc = new Runnable() {
@Override
public void run() {
reBindService();
}
};
@Override
public void onCreate() {
super.onCreate();
mContext = this;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (DEBUG) Log.d(TAG, "onStartCommand");
if (isExistAppPackage(APP_PACKAGE_NAME)) {
Intent intent1 = new Intent(APP_INTERFACE_NAME);
intent1.setPackage(APP_PACKAGE_NAME);
intent1.setComponent(new ComponentName(APP_PACKAGE_NAME,APP_SERVICE_NAME));
mContext.bindService(intent1, mServiceConnection, BIND_AUTO_CREATE);
}
return Service.START_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
}
private IBinder mService;
private ServiceConnection mServiceConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
try {
if (DEBUG) Log.d(TAG, "onServiceConnected : " + className.getPackageName() + " " + className.getClassName());
mService = service;
} catch (Exception e) {
Log.e(TAG, "onServiceConnected Exception : " + e);
}
}
public void onServiceDisconnected(ComponentName className) {
try {
if (DEBUG) Log.d(TAG, "onServiceDisconnected : " + className.getPackageName() + " " + className.getClassName());
mService = null;
unbindService(mServiceConnection);
mHandler.postDelayed(mRebindFunc, RESTART_BIND_INTERVAL);
} catch (Exception e) {
Log.e(TAG, "onServiceDisconnected : " + e);
}
}
};
@Override
public IBinder onBind(Intent intent) {
return null;
}
private void reBindService() {
if (DEBUG) Log.d(TAG, "reBindService");
if (isExistAppPackage(APP_PACKAGE_NAME)) {
Intent intent = new Intent(APP_INTERFACE_NAME);
intent.setPackage(APP_PACKAGE_NAME);
bindAppService(intent);
}
}
private void bindAppService(Intent intent) {
if (DEBUG) Log.d(TAG, "Bind Intent : " + intent);
if (mContext.bindService(intent, mServiceConnection, BIND_AUTO_CREATE)) {
//如果已经绑定了服务，重新连接
if (DEBUG) Log.d(TAG, "BindService Success");
mBindRetryCount = 0;
mHandler.removeCallbacks(mRebindFunc);
} else {
//如果绑定失败，每间隔1秒进行10次重试
mBindRetryCount++;
if (DEBUG) Log.d(TAG, "Retry Count : " + mBindRetryCount);
if (mBindRetryCount < MAX_RETRY_COUNT) {
if (DEBUG) Log.d(TAG, "Bind Service Failed. Retry in 1 second.");
mHandler.postDelayed(mRebindFunc, RESTART_BIND_INTERVAL);
} else {
mBindRetryCount = 0;
if (DEBUG) Log.d(TAG, "Bind Service was Retried a Maximum.");
}
}
}
public boolean isExistAppPackage(String packageName) {
//判断app包是否存在
boolean ret = false;
PackageManager pm = getApplicationContext().getPackageManager();
try {
pm.getPackageInfo(packageName, PackageManager.GET_ACTIVITIES);
ret = true;
} catch (PackageManager.NameNotFoundException e) {
if (DEBUG) Log.w(TAG, "App Package Not Found:"+packageName);
ret = false;
}
return ret;
}
}
可以接收开机广播以后，就启动这个service来绑定要被保活的应用
2、被守护的进程
①创建一个aidl，用于进程间通信
interface IRegisterReceiverService {
}
②AndroidManifest.xml中注册被绑定的service
<service android:name="com.android.alarmclock.RegisterReceiverService"
android:permission="android.permission.BIND_JOB_SERVICE"
android:exported="true">
<intent-filter>
<action android:name="com.android.alarmclock.IRegisterReceiverService" />
</intent-filter>
</service>
③继承JobIntentService
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Binder;
import android.os.IBinder;
import android.support.v4.app.JobIntentService;
public class RegisterReceiverService extends JobIntentService {
private final static String TAG = "RegisterReceiverService ";
private final static int REGISTER_RECEIVER_ID = ;
private final IBinder mBinder = new RegisterReceiverServiceBinder();
private final IRegisterReceiverService.Stub mRegisterReceiverServiceBinder = new IRegisterReceiverService.Stub() {
};
public class RegisterReceiverServiceBinder extends Binder {
public RegisterReceiverService getRegisterReceiverServiceBinder() {
return RegisterReceiverService.this;
}
}
public static void enqueueWork(Context context, Intent work) {
enqueueWork(context, RegisterReceiverService.class, REGISTER_RECEIVER_ID, work);
}
@Override
public void onHandleWork (Intent intent) {
LogUtils.v("RegisterReceiverService Call onHandleWork");
}
@Override
public void onCreate() {
super.onCreate();
LogUtils.d(TAG + "onCreate()");
}
@Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
LogUtils.d(TAG + "onStart()");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
String action = "";
if(intent != null) {
action = intent.getAction();
action = action == null ? "" : action;
}
LogUtils.d(TAG + "onStartCommand() action=" + action );
//可以在这里进行拉起进程后的操作
return Service.START_STICKY;
}
@Override
public IBinder onBind(Intent intent) {
LogUtils.d(TAG + "onBind()");
String action = "";
if(intent != null) {
action = intent.getAction();
action = action == null ? "" : action;
}
//可以在这里进行拉起进程后的操作
return mBinder;
}
@Override
public void onDestroy() {
LogUtils.d(TAG + "onDestroy()");
unregisterReceiver(mAlarmInitReceiver);
super.onDestroy();
}
}
此方法可以守护多个进程，启动多个进程的service即可
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