Android中Service生命周期

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package
com.zhenghuiy.killedservicelifecycletest;

import android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public
class MainActivity extends
Activity implements
OnClickListener{

    private
Button startServiceBtn;

    @Override

    protected
void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        initViews();

    }

    private
void initViews() {

        startServiceBtn = (Button) findViewById(R.id.startService);

        startServiceBtn.setOnClickListener(this);

    }

    @Override

    public
void onClick(View view) {

        if(view.getId() == R.id.startService){

            Intent intent = new
Intent();

            intent.setClass(this, MyService.class);

            this.startService(intent);

        }

    }

}

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package
com.zhenghuiy.killedservicelifecycletest;

import android.app.Service;

import android.content.Intent;

import android.os.IBinder;

import android.util.Log;

public class MyService extends
Service implements
Runnable{

    /*

     * Service当以bindService的形式调用时，会调用onBind

     * 当以startService,则调用onStartCommand

     * 另外，onBind是一个抽象函数，必须重写

     * */

    @Override

    public
int onStartCommand(Intent intent, int
flags, int
startId) {

        showLog("onStartCommand is called");

        //Service运行在UI主线程，为了避免因堵塞而被关闭，另开一个线程

        new
Thread(this).start();

        return
super.onStartCommand(intent, flags, startId);

    }

    @Override

    public
IBinder onBind(Intent itent) {

        showLog("onBind is called");

        return
null;

    }

    @Override

    public
void onCreate() {

        super.onCreate();

        showLog("onCreate is called");

    }

    @Override

    public
void onDestroy() {

        super.onDestroy();

        showLog("onDestroy is called");

    }

    /*

     * onStart方法已经过时

     * 在2.0之后的版本使用onStartCommand

     * */

    @Override

    @Deprecated

    public
void onStart(Intent intent, int
startId) {

        super.onStart(intent, startId);

        showLog("onStart is called,the Intent action is"+intent.getAction());

    }

    @Override

    public
void onTaskRemoved(Intent rootIntent) {

        super.onTaskRemoved(rootIntent);

        showLog("onTaskRemoved is called,the Intent action is"+rootIntent.getAction());

    }

    @Override

    public
void onTrimMemory(int
level) {

        super.onTrimMemory(level);

        showLog("onTrimMemory is called,the level is"+level);

    }

    private
void showLog(String text){

        Log.v(this.getClass().getName(),text);

    }

    @Override

    public
void run() {

        while(true){}

    }

}