通过bind实现activity与service的交互

先点bind按钮实现onCreate，在点击start给service传值（get方法）

xml：

 <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"
     tools:context="com.zzw.bind.MainActivity" >

     <Button
         android:id="@+id/start"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignParentTop="true"
         android:layout_centerHorizontal="true"
         android:layout_marginTop="71dp"
         android:text="start" />

     <Button
         android:id="@+id/bind"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignLeft="@+id/start"
         android:layout_below="@+id/start"
         android:layout_marginTop="65dp"
         android:text="bind" />

     <Button
         android:id="@+id/dedao"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignLeft="@+id/bind"
         android:layout_alignParentBottom="true"
         android:layout_marginBottom="80dp"
         android:text="取值" />

 </RelativeLayout>

布局

记住注册service

MainActivity：

 package com.zzw.bind;

 import com.zzw.bind.MyAppService.MyBinder;

 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.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;

 public class MainActivity extends Activity {
     private ServiceConnection sc;
     private MyAppService myAppService;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

         sc = new ServiceConnection() {
             @Override
             public void onServiceDisconnected(ComponentName name) {

             }

             @Override
             public void onServiceConnected(ComponentName name, IBinder service) {
                 MyBinder mBinder = (MyBinder) service;
                 myAppService = mBinder.getService();
             }
         };
         findViewById(R.id.start).setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 startService();
             }
         });
         findViewById(R.id.bind).setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 bindService();
             }
         });
         findViewById(R.id.dedao).setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 String str = myAppService.getServiceValue();
                 Log.d("得到的值", str);
             }
         });

     }

     private void startService() {
         myAppService.setServiceValue("hello");

         Intent intent = new Intent(this, MyAppService.class);
         startService(intent);
     }

     private void bindService() {
         Intent intent = new Intent(this, MyAppService.class);
         bindService(intent, sc, Service.BIND_AUTO_CREATE);
     }

     @Override
     protected void onDestroy() {
         super.onDestroy();
         Intent intent = new Intent(this, MyAppService.class);
         stopService(intent);
         Log.d("MainActivity", "onDestroy");
     }

 }

Service：

 package com.zzw.bind;

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

 public class MyAppService extends Service {
     private String str;

     @Override
     public void onCreate() {
         super.onCreate();
         Log.d("MyAppService","onCreate");
     }

     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
         this.str=str+",world";
         Log.d("onStartCommand",str);
         return super.onStartCommand(intent, flags, startId);
     }

     public String getServiceValue() {
         Log.d("getServiceValue", str);
         return str;
     }

     public void setServiceValue(String str) {
         Log.d("setServiceValue", str);
         this.str = str;
     }

     @Override
     public IBinder onBind(Intent intent) {
         Log.d("onBind", "======");
         return new MyBinder();
     }

     public class MyBinder extends Binder {
         public MyAppService getService() {
             Log.d("getService", "====");
             return MyAppService.this;
         }
     }

     @Override
     public void onDestroy() {
         Log.d("MyAppService", "onDestroy");
         super.onDestroy();
     }

     @Override
     public boolean onUnbind(Intent intent) {
         Log.d("MyAppService", "onUnbind");
         return super.onUnbind(intent);
     }

 }