BindService
来源：互联网 发布：博拉网络招聘 编辑：程序博客网 时间：2024/05/17 09:21
public class BindService extends Service { private int mCount; private boolean mQuit; // 定义onBinder方法所返回的对象 private final MyBinder mBinder = new MyBinder(); // 通过继承Binder来实现IBinder类 public class MyBinder extends Binder { public int getCount() { // 获取Service的运行状态：count return mCount; } } // 必须实现的方法，绑定该Service时回调该方法 @Override public IBinder onBind(Intent intent) { System.out.println("Service is Binded"); // 返回IBinder对象 return mBinder; } // Service被创建时回调该方法。 @Override public void onCreate() { super.onCreate(); System.out.println("Service is Created"); // 启动一条线程、动态地修改count状态值 new Thread() { @Override public void run() { while (!mQuit) { try { Thread.sleep(1000); } catch (InterruptedException e) { } mCount++; } } }.start(); } // Service被断开连接时回调该方法 @Override public boolean onUnbind(Intent intent) { System.out.println("Service is Unbinded"); return true; } // Service被关闭之前回调该方法。 @Override public void onDestroy() { super.onDestroy(); this.mQuit = true; System.out.println("Service is Destroyed"); }}<!-- 配置该Service组件 --><service android:name=".BindService" > <intent-filter> <action android:name="org.crazyit.service.BIND_SERVICE" /> </intent-filter></service>
public class BindServiceTest extends Activity { Button bind, unbind, getServiceStatus; // 保持所启动的Service的IBinder对象 BindService.MyBinder mBinder; // 定义一个ServiceConnection对象 private final ServiceConnection mConnection = new ServiceConnection() { @Override // 当该Activity与Service连接成功时回调该方法 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 mBinder = (BindService.MyBinder) service; } @Override // 当该Activity与Service断开连接时回调该方法 public void onServiceDisconnected(ComponentName name) { System.out.println("--Service Disconnected--"); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); bind = (Button) findViewById(R.id.bind); unbind = (Button) findViewById(R.id.unbind); getServiceStatus = (Button) findViewById(R.id.getServiceStatus); // 创建启动Service的Intent final Intent intent = new Intent(); intent.setAction("org.crazyit.service.BIND_SERVICE"); bind.setOnClickListener(new OnClickListener() { @Override public void onClick(View source) { // 绑定指定Serivce bindService(intent, mConnection, Service.BIND_AUTO_CREATE); } }); unbind.setOnClickListener(new OnClickListener() { @Override public void onClick(View source) { // 解除绑定Serivce unbindService(mConnection); } }); getServiceStatus.setOnClickListener(new OnClickListener() { @Override public void onClick(View source) { // 获取、并显示Service的count值 Toast.makeText(BindServiceTest.this, "Serivce的count值为：" + mBinder.getCount(), Toast.LENGTH_SHORT).show(); } }); }}对于servicer的onBind()方法所返回的IBinder对象来说，它可被当成该Service组件所返回的回调对象，service允许客户端通过该IBinder对象来访问Service内部的数据，这样即可实现客户端与Service之间的通信。
