Android service的开启和绑定，以及调用service的方法

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="开启服务"
android:onClick="start"
/>

<Button android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="关闭服务"
android:onClick="close"
/>

<Button android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="绑定服务"
android:onClick="bind"
/>

<Button android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="取消绑定服务"
android:onClick="unbind"
/>

<Button android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="调用服务的方法function()"
android:onClick="callFunction"
/>
</LinearLayout>

package com.example.serviceTest;

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.view.View;

public class MyActivity extends Activity {

private IService myBinder;
private ServiceConnection myConn = new MyConn();

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}

public void start(View view) {
startService(new Intent(this, TestService.class));
}

/**
* 多次调用停止服务，没有出现问题（不能多次解绑）
*/
public void close(View view) {
stopService(new Intent(this, TestService.class));
}

public void bind(View view) {
Intent intent = new Intent(this, TestService.class);
bindService(intent, myConn, BIND_AUTO_CREATE);
}

/**
* 多次解绑服务会报出错误
*/
public void unbind(View view) {
unbindService(myConn);
}

public void callFunction(View view) {
if (myBinder != null) {
myBinder.callFunction();
}
}

//绑定的时候，回调的一些方法
class MyConn implements ServiceConnection {

@Override
public void onServiceConnected(ComponentName name, IBinder service) {
System.out.println("获取到binder");
myBinder = (IService) service;
}

@Override
public void onServiceDisconnected(ComponentName name) {
System.out.println("com.example.serviceTest.MyActivity.MyConn.onServiceDisconnected");
}
}
}

package com.example.serviceTest;

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.widget.Toast;

/**
* Created by Heyiyong on 14-5-16.
*/
public class TestService extends Service {

public IBinder onBind(Intent intent) {
System.out.println("服务被绑定了！");
return new MyBinder();
}

//中间人（service的代理）
private class MyBinder extends Binder implements IService{
public void callFunction() {
function();
}
}

@Override
public void onCreate() {
System.out.println("com.example.serviceTest.TestService.onCreate");
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
System.out.println("com.example.serviceTest.TestService.onStartCommand");
return super.onStartCommand(intent, flags, startId);
}

@Override
public void onDestroy() {
System.out.println("com.example.serviceTest.TestService.onDestroy");
}

@Override
public boolean onUnbind(Intent intent) {
System.out.println("com.example.serviceTest.TestService.onUnbind");
return super.onUnbind(intent);
}

public void function() {
Toast.makeText(getApplicationContext(), "function()方法被调用了！", 1).show();
System.out.println("com.example.serviceTest.TestService.function");
}
}