绑定本地Service并与之通信

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绑定Service需要调用

public boolean bindService (Intent service, ServiceConnection conn, int flags)；

传入一个ServiceConnection 对象，该对象是一个接口，实例化时需要实现该接口，它的作用就是获得Service的IBinder对象，通过IBinder对象可以实现与Service的通信。

Service的的代码：

 1 package com.example.servicetest; 2  3 import android.app.Service; 4 import android.content.Intent; 5 import android.os.Binder; 6 import android.os.IBinder; 7 import android.util.Log; 8  9 public class BindServiceTest extends Service {10     private int count = 0;11     private boolean quit = false;12     private MyBinder mBinder = new MyBinder();13 14     public class MyBinder extends Binder {15         public int count() {16             return count;17         }18     }19 20     @Override21     public IBinder onBind(Intent arg0) {22         Log.i("csx", "onBind");23         return mBinder;24     }25 26     @Override27     public void onCreate() {28 29         super.onCreate();30         Log.i("csx", "onCreate");31         new Thread() {32 33             @Override34             public void run() {35                 while (!quit) {36                     try {37                         Thread.sleep(1000);38                     } catch (InterruptedException e) {39 40                         e.printStackTrace();41                     }42                     count++;43 44                 }45 46             }47 48         }.start();49     }50 51     @Override52     public int onStartCommand(Intent intent, int flags, int startId) {53         Log.i("csx", "onStartCommand");54         return START_STICKY;55     }56 57     @Override58     public boolean onUnbind(Intent intent) {59         Log.i("csx", "onUnbind");60         return true;61     }62 63     @Override64     public void onDestroy() {65         super.onDestroy();66         this.quit = true;67         Log.i("csx", "onDestroy");68     }69 70 }

组件的代码：

 1 package com.example.servicetest; 2  3 import com.example.servicetest.BindServiceTest.MyBinder; 4  5 import android.content.ComponentName; 6 import android.content.Intent; 7 import android.content.ServiceConnection; 8 import android.os.Bundle; 9 import android.os.IBinder;10 import android.support.v7.app.ActionBarActivity;11 import android.util.Log;12 import android.view.View;13 import android.view.View.OnClickListener;14 import android.widget.Button;15 import android.widget.Toast;16 17 public class MainActivity extends ActionBarActivity {18     public static final String SERVICE_ACTION = "com.example.servicetest.BindServiceTest";19     Button bindButton, unbindButton, stateButton;20     ServiceConnection conn;21     BindServiceTest.MyBinder mBinder;22     boolean isBind = false;23 24     @Override25     protected void onCreate(Bundle savedInstanceState) {26         super.onCreate(savedInstanceState);27         setContentView(R.layout.activity_main);28         bindButton = (Button) findViewById(R.id.button_bind);29         unbindButton = (Button) findViewById(R.id.button_unbind);30         stateButton = (Button) findViewById(R.id.button_get_state);31 32         conn = new ServiceConnection() {33 34             @Override35             public void onServiceConnected(ComponentName name, IBinder service) {36                 Log.i("csx", "onServiceConnected");37                 mBinder = (MyBinder) service; // 连接service之后将service中实现的Binder返回给本地声明的Binder38 39             }40 41             @Override42             public void onServiceDisconnected(ComponentName name) {43                 Log.i("csx", "onServiceDisconnected");// 意外断开连接会调用该函数44 45             }46 47         };48 49         bindButton.setOnClickListener(new OnClickListener() {50 51             @Override52             public void onClick(View v) {53                 Intent service = new Intent();54                 service.setAction(SERVICE_ACTION);55                 bindService(service, conn, BIND_AUTO_CREATE);// 绑定服务56                 isBind = true;57 58             }59         });60 61         unbindButton.setOnClickListener(new OnClickListener() {62 63             @Override64             public void onClick(View v) {65                 if (!isBind) {66                     Toast.makeText(MainActivity.this, "请先绑定服务", Toast.LENGTH_SHORT).show();67                     return;68 69                 }70 71                 unbindService(conn);// 解除绑定服务72                 isBind = false;73 74             }75         });76 77         stateButton.setOnClickListener(new OnClickListener() {78 79             @Override80             public void onClick(View v) {81                 if (!isBind) {82                     Toast.makeText(MainActivity.this, "请先绑定服务", Toast.LENGTH_SHORT).show();83                     return;84 85                 }86                 Toast.makeText(MainActivity.this, "" + mBinder.count(), Toast.LENGTH_SHORT).show();// 通过mBinder获取service内部的数据87 88             }89         });90 91     }92 }

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