MainActivity 類:
package com.itheima74.test;import android.content.ComponentName;import android.content.Intent;import android.content.ServiceConnection;import android.os.Bundle;import android.os.IBinder;import android.support.v7.app.AppCompatActivity;import android.view.View;/** * 混合方式開啟服務,百度音樂盒框架的搭建 */public class MainActivity extends AppCompatActivity {    PRivate MyConn mConn;    private Iservice mIservice;// 中間人對象,獲取這個對象后可以調用其方法(服務中的方法)    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        // 1.先startService()保證服務在后臺長期運行        Intent intent = new Intent(this, MusicService.class);        startService(intent);        // 2.再bindService()獲取中間人對象以調用服務中的方法        mConn = new MyConn();        bindService(intent,mConn,BIND_AUTO_CREATE);    }    private class MyConn implements ServiceConnection {        @Override        public void onServiceConnected(ComponentName name, IBinder service) {            mIservice = (Iservice) service;        }        @Override        public void onServiceDisconnected(ComponentName name) {        }    }    // 點擊按鈕,播放音樂    public void playMusic(View view) {        mIservice.callPlayMusic();    }    // 點擊按鈕,暫停音樂    public void pauseMusic(View view) {        mIservice.callPauseMusic();    }    // 點擊按鈕,重新播放音樂    public void replayMusic(View view) {        mIservice.callReplayMusic();    }    @Override    protected void onDestroy() {        super.onDestroy();        // 取消綁定服務        unbindService(mConn);    }}
MusicService 類:
package com.itheima74.test;import android.app.Service;import android.content.Intent;import android.os.Binder;import android.os.IBinder;import android.support.annotation.Nullable;/** * Created by My on 2017/2/23. */public class MusicService extends Service {    @Nullable    @Override    public IBinder onBind(Intent intent) {        return new MyBinder();    }    @Override    public void onCreate() {        super.onCreate();    }    @Override    public void onDestroy() {        super.onDestroy();    }    // 播放音樂的方法    public void playMusic(){        System.out.println("音樂播放了");    }    // 暫停音樂的方法    public void pauseMusic(){        System.out.println("音樂暫停了");    }    // 重新播放音樂的方法    public void replayMusic(){        System.out.println("音樂重新播放了");    }    // 定義中間人對象    private class MyBinder extends Binder implements Iservice{        @Override        public void callPlayMusic() {            playMusic();        }        @Override        public void callPauseMusic() {            pauseMusic();        }        @Override        public void callReplayMusic() {            replayMusic();        }    }}
Iservice 接口:
package com.itheima74.test;/** * 定義一個接口,將想暴露的方法暴露出去 * Created by My on 2017/2/23. */public interface Iservice {    void callPlayMusic();    void callPauseMusic();    void callReplayMusic();}