IntentService简介

package com.lenovo.robin.test;
import android.app.IntentService;
import android.content.Intent;
import android.util.Log;
 
public class MyIntentService extends IntentService {
final static String TAG="robin";
public MyIntentService() {
super("com.lenovo.robin.test.MyIntentService");
Log.i(TAG,this+" is constructed");
}
@Override
protected void onHandleIntent(Intent arg0) {
Log.i(TAG,"begin onHandleIntent() in "+this);
try {
Thread.sleep(10*1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
Log.i(TAG,"end onHandleIntent() in "+this);
}
public void onDestroy()
{
super.onDestroy();
Log.i(TAG,this+" is destroy");
}
}

Intent intent=new Intent(this,MyIntentService.class);
startService(intent);
startService(intent);
startService(intent);

package android.app;
 
import android.content.Intent;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
 
public abstract class IntentService extends Service {
    private volatile Looper mServiceLooper;
    private volatile ServiceHandler mServiceHandler;
    private String mName;
    private boolean mRedelivery;
 
    private final class ServiceHandler extends Handler {
        public ServiceHandler(Looper looper) {
            super(looper);
        }
 
        @Override
        public void handleMessage(Message msg) {
            onHandleIntent((Intent)msg.obj);
            stopSelf(msg.arg1);
        }
    }
 
    public IntentService(String name) {
        super();
        mName = name;
    }
 
    public void setIntentRedelivery(boolean enabled) {
        mRedelivery = enabled;
    }
 
    @Override
    public void onCreate() {
        // TODO: It would be nice to have an option to hold a partial wakelock
        // during processing, and to have a static startService(Context, Intent)
        // method that would launch the service & hand off a wakelock.
 
        super.onCreate();
        HandlerThread thread = new HandlerThread("IntentService[" + mName + "]");
        thread.start();
 
        mServiceLooper = thread.getLooper();
        mServiceHandler = new ServiceHandler(mServiceLooper);
    }
 
    @Override
    public void onStart(Intent intent, int startId) {
        Message msg = mServiceHandler.obtainMessage();
        msg.arg1 = startId;
        msg.obj = intent;
        mServiceHandler.sendMessage(msg);
    }
 
    /**
     * You should not override this method for your IntentService. Instead,
     * override {@link #onHandleIntent}, which the system calls when the IntentService
     * receives a start request.
     * @see android.app.Service#onStartCommand
     */
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        onStart(intent, startId);
        return mRedelivery ? START_REDELIVER_INTENT : START_NOT_STICKY;
    }
 
    @Override
    public void onDestroy() {
        mServiceLooper.quit();
    }
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
 
  protected abstract void onHandleIntent(Intent intent);
}