Android的Service

浏览数：14 / 时间：2015年06月11日

原来总感觉四大组建Service和Broadcaster Receiver用的少，其实不然，只是因为比较抽象，他们总是默默无闻的在后台进行服务

写了个demo测试了一下，一个是生命周期，一个是绑定服务，解绑服务，感觉这个用mp3播放比较形象

下面是工程列表，感觉在顺序上不只是Eclipse还是google调整了一下

技术分享

MainActivity.class

package cn.edu.sjzc.fanyafeng.activity;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import cn.edu.sjzc.fanyafeng.service.MyService;
import cn.edu.sjzc.fanyafeng.servicedemo.R;

public class MainActivity extends Activity implements OnClickListener {

private Button start, end, bind, unbind;

private static String TAG = "生命周期";

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

Log.i(TAG, "onCreate方法执行");

initView();
}

private void initView() {
this.start = (Button) MainActivity.this.findViewById(R.id.start);
this.start.setOnClickListener(this);

this.end = (Button) MainActivity.this.findViewById(R.id.end);
this.end.setOnClickListener(this);

this.bind = (Button) MainActivity.this.findViewById(R.id.bind);
this.bind.setOnClickListener(this);

this.unbind = (Button) MainActivity.this.findViewById(R.id.unbind);
this.unbind.setOnClickListener(this);

}

@Override
public void onClick(View v) {
// TODO Auto-generated method stub

Intent intent = new Intent(MainActivity.this,MyService.class);

switch (v.getId()) {
case R.id.start:

startService(intent);

break;
case R.id.end:

stopService(intent);

break;
case R.id.bind:

bindService(intent, conn, BIND_AUTO_CREATE);

break;
case R.id.unbind:

unbindService(conn);

break;

default:
break;
}

}

final ServiceConnection conn = new ServiceConnection() {

@Override
public void onServiceDisconnected(ComponentName name) {
// TODO Auto-generated method stub

}

@Override
public void onServiceConnected(ComponentName name, IBinder service) {
// TODO Auto-generated method stub

}
};
}

MyService.java

package cn.edu.sjzc.fanyafeng.service;

import cn.edu.sjzc.fanyafeng.servicedemo.R;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;

public class MyService extends Service {
// 定义输入日志
private static String TAG = "生命周期";
// 定义音乐播放变量
private MediaPlayer mPlayer;

private MyBinder mBinder = new MyBinder();

@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
Log.i(TAG, "onBind()执行");
// mPlayer.start();
return mBinder;
}

@Override
public void onCreate() {
// TODO Auto-generated method stub
Log.i(TAG, "onCreate()执行");//第一个执行
//R.raw.xxxx其中raw不能换成其他的名称，不然Android识别不出来，囧
mPlayer = MediaPlayer.create(getApplicationContext(), R.raw.qimiaozhongdejiyi);
//设置音乐循环播放,这个大家可以想一下Handler其中的Looper
mPlayer.setLooping(true);
super.onCreate();
}

@Override
public void onDestroy() {
// TODO Auto-generated method stub
Log.i(TAG, "onDestroy()执行");//停止播放时执行
mPlayer.stop();
super.onDestroy();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// TODO Auto-generated method stub
Log.i(TAG, "onStartCommand()执行");//第二个执行
mPlayer.start();
return super.onStartCommand(intent, flags, startId);
}

@Override
public boolean onUnbind(Intent intent) {
// TODO Auto-generated method stub
Log.i(TAG, "onUnbind()执行");
return super.onUnbind(intent);
}

@SuppressWarnings("deprecation")
@Override
public void onStart(Intent intent, int startId) {
// TODO Auto-generated method stub
//onStart方法被谷歌打上了横杠，不建议大家使用
Log.i(TAG, "onStart()执行");//第三个执行
//start()方法放在onStartCommand
// mPlayer.start();
super.onStart(intent, startId);
}

public class MyBinder extends Binder{
MyService getService(){
return MyService.this;
}
}

}