Service_binder的使用

package com.example.service_binder;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
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.widget.Button;
import android.widget.TextView;

/**
 * @author HD
 * @date 2015-11-26
 * @package_name com.example.service_binder
 * @file_name MainActivity.java
 */

/*通过直接继承binder类并且返回一个binder对象，此通讯方法仅适合服务端和客户端在同一进程当中
 * 例如，对于需要将 Activity 绑定到在后台播放音乐的自有服务的音乐应用，此方法非常有效
 * 
 * */
public class MainActivity extends Activity {
    private Button mButton;
    private TextView mTextView;
    boolean mIsbound = false;
    MyService myservice;
    ServiceConnection conn = new ServiceConnection() {

        @Override
        public void onServiceDisconnected(ComponentName name) {
            // TODO 自动生成的方法存根
            Log.i("hhhd", "onServiceDisconnected");
        }

        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            // TODO 自动生成的方法存根
            Log.i("hhhd", "onServiceConnected");
//          实例化Mybinder对象
            myservice = ((MyService.MyBinder) service).getService();
//          调用MyService中的方法
            int result = myservice.getResult(55, 22);
//          调用MyService中的变量
            int receive_msg = myservice.sendMsg;
            mTextView.setText(result+""+receive_msg);
            mIsbound = true;
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mButton = (Button) findViewById(R.id.button1);
        mTextView = (TextView) findViewById(R.id.textView1);
        mButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO 自动生成的方法存根
                doBindService();
            }
        });
    }

    void doBindService(){
        Intent intent = new Intent();
        intent.setClass(MainActivity.this, MyService.class);
        bindService(intent, conn, Context.BIND_AUTO_CREATE);
    }

    void doUnbindService(){
        if(mIsbound){
            if(myservice != null){
                unbindService(conn);
            }
        }
    }

    @Override
    protected void onDestroy() {
        // TODO 自动生成的方法存根
        super.onDestroy();
        doUnbindService();
    }
}

package com.example.service_binder;


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

/**
 * @author HD
 * @date 2015-11-26
 * @package_name com.example.service_binder
 * @file_name MyService.java
 */
public class MyService extends Service {
    int sendMsg = 2;

    MyBinder mYBinder = new MyBinder();

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

    @Override
    public void onCreate() {
        // TODO 自动生成的方法存根
        super.onCreate();
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO 自动生成的方法存根
        return mYBinder;
    }

    @Override
    public void onDestroy() {
        // TODO 自动生成的方法存根
        super.onDestroy();
    }

    int getResult(int arg1,int arg2){
        int result = arg1+arg2;
        return result;
    }

}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.service_binder"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="21" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service android:name=".MyService"></service>
    </application>

</manifest>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.service_binder.MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="138dp"
         />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="Button" />

</RelativeLayout>