用Service来启动背景音乐

package com.music.ui; import com.music.service.MusicService; import com.music.service.R; import com.music.service.MusicService.MyBinder; import com.music.service.R.id; import com.music.service.R.layout; import android.app.Activity; import android.app.Service; import android.content.ComponentName; import android.content.Intent; import android.content.ServiceConnection; import android.os.Bundle; import android.os.IBinder; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; public class MusicActivity extends Activity { Button open, close, getTime; // 保持所启动的Service的IBinder对象 MusicService.MyBinder binder; // 定义一个ServiceConnection对象 private ServiceConnection conn = new ServiceConnection() { // 当该Activity与Service连接成功时回调该方法 @Override public void onServiceConnected(ComponentName name , IBinder service) { System.out.println("--Service Connected--"); // 获取Service的onBind方法所返回的MyBinder对象 binder = (MusicService.MyBinder) service; } // 当该Activity与Service断开连接时回调该方法 @Override public void onServiceDisconnected(ComponentName name) { System.out.println("--Service Disconnected--"); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // 获取程序界面中的start、stop、getServiceStatus按钮 open = (Button) findViewById(R.id.bind); close = (Button) findViewById(R.id.unbind); getTime = (Button) findViewById(R.id.getServiceStatus); // 创建启动Service的Intent final Intent intent = new Intent(); // 为Intent设置Action属性 intent.setAction("com.music.service.BIND_SERVICE"); open.setOnClickListener(new OnClickListener() { @Override public void onClick(View source) { // 绑定指定Serivce bindService(intent, conn, Service.BIND_AUTO_CREATE); } }); close.setOnClickListener(new OnClickListener() { @Override public void onClick(View source) { // 解除绑定Serivce unbindService(conn); } }); getTime.setOnClickListener(new OnClickListener() { @Override public void onClick(View source) { // 获取、并显示Service的count值 Toast.makeText(MusicActivity.this, "Serivce的count值为：" + binder.getCount(), Toast.LENGTH_SHORT).show(); //② } }); } }