若對AIDL感興趣，請參考跨進程通信二 AIDL

綁定服務

Ibinder實現綁定服務

功能：主要為了實現組件與服務的交互，在綁定的組件可以調用服務端的功能函數

package service;import android.app.Service; import android.content.Intent; import android.os.Binder; import android.os.IBinder; import HttpURL.HttpUtil;/*** 創建綁定服務：通過繼承Binder類，來為客戶端提供IBinder接口（本地應用且為單進程）*/ public class MyService extends Service {IBinder mIBinder = new MyBinder();public class MyBinder extends Binder {public BinderService getBinderService(){return BinderService.this;}}@Overridepublic void onCreate() {}@Overridepublic IBinder onBind(final Intent intent) {new Thread(new Runnable() {@Overridepublic void run() {HttpUtil.downloadPicture(intent.getStringExtra("address"));}}).start();return mIBinder;}@Overridepublic boolean onUnbind(Intent intent) {return true;}@Overridepublic void onRebind(Intent intent) {}@Overridepublic void onDestroy() {} } public ServiceConnection serviceConnection = new ServiceConnection() {@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {BinderService.MyBinder myBinder = (BinderService.MyBinder) service;bind_service = myBinder.getBinderService();}@Overridepublic void onServiceDisconnected(ComponentName name) {} };@Override protected void onStart() {super.onStart();String address = "https://img-blog.csdn.net/20160527205804527";Intent intent = new Intent(this, BinderService.class);intent.putExtra("address", address);bindService(intent, serviceConnection, BIND_AUTO_CREATE);}@Overrideprotected void onStop() {super.onStop();unbindService(serviceConnection); }

Messenger實現綁定服務

功能：為了實現跨進程通信，讓客戶端與服務端實現雙向通信

效果圖

配置文件

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.android.client" ><application android:allowBackup="true"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:supportsRtl="true"android:theme="@style/AppTheme" ><activity android:name=".MainActivity" ><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><service android:name=".MessengerService"android:process=":remote"></service></application></manifest>

布局

<?xml version="1.0" encoding="utf-8"?> <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"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"android:paddingBottom="@dimen/activity_vertical_margin"tools:context=".MainActivity"><EditText android:id="@+id/num1"android:layout_width="100dp"android:layout_height="wrap_content" /><TextView android:id="@+id/plus"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="+"android:layout_toRightOf="@id/num1"android:textSize="20sp"/><EditText android:id="@+id/num2"android:layout_width="100dp"android:layout_height="wrap_content"android:layout_toRightOf="@id/plus"/><TextView android:id="@+id/equal"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="="android:layout_toRightOf="@id/num2"android:textSize="20sp"/><EditText android:id="@+id/sum"android:layout_width="100dp"android:layout_height="wrap_content"android:layout_toRightOf="@id/equal"android:textSize="20sp"android:editable="false"/><Button android:id="@+id/calculate"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginTop="80dp"android:text="計算" /></RelativeLayout>

服務端

package com.android.client;import android.app.Service;import android.content.Intent; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.Messenger; import android.os.RemoteException;/*** 服務端*/ public class MessengerService extends Service {public static final int MSG_SUM = 1;public static final int MSG_RET = 2;public Messenger clientMessenger;public Messenger serverMessenger = new Messenger(new Handler(){@Overridepublic void handleMessage(Message msg) {switch (msg.what){case MSG_SUM:clientMessenger = msg.replyTo;Message message = Message.obtain(null,MSG_RET);message.arg1 = msg.arg1+msg.arg2;try {clientMessenger.send(message);} catch (RemoteException e) {e.printStackTrace();}break;default:handleMessage(msg);}}});@Overridepublic IBinder onBind(Intent intent) {return serverMessenger.getBinder();}@Overridepublic boolean onUnbind(Intent intent) {return true;}@Overridepublic void onRebind(Intent intent) {}}

客戶端

package com.android.client;import android.app.Activity; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.ServiceConnection; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast;public class MainActivity extends Activity implements View.OnClickListener {public static final int MSG_SUM = 1;public static final int MSG_RET = 2;public EditText num1;public EditText num2;public EditText sum;public Button btn;//客戶端信使public Messenger clientMessenger = new Messenger(new Handler(){@Overridepublic void handleMessage(Message msg) {switch (msg.what){case MSG_RET:sum.setText(msg.arg1+"");break;default:super.handleMessage(msg);}}});//服務端信使public Messenger serverMessenger;public ServiceConnection serviceConnection = new ServiceConnection() {@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {serverMessenger = new Messenger(service);}@Overridepublic void onServiceDisconnected(ComponentName name) {serverMessenger = null;}};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);num1 = (EditText) findViewById(R.id.num1);num2 = (EditText) findViewById(R.id.num2);sum = (EditText) findViewById(R.id.sum);btn = (Button) findViewById(R.id.calculate);Intent intent = new Intent(this,MessengerService.class);bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);btn.setOnClickListener(this);}@Overrideprotected void onDestroy() {super.onDestroy();unbindService(serviceConnection);}@Overridepublic void onClick(View v) {if(num1.getText().toString().equals("") ||num2.getText().toString().equals("") ){Toast.makeText(this,"請輸入數值",Toast.LENGTH_SHORT).show();return;}Message message = Message.obtain(null,MSG_SUM,Integer.parseInt(num1.getText().toString()),Integer.parseInt(num2.getText().toString()));message.replyTo = clientMessenger;try {serverMessenger.send(message);} catch (RemoteException e) {e.printStackTrace();}} }

參考文章：
［1］https://developer.android.com/guide/components/bound-services.html
［2］https://developer.android.com/reference/android/app/Service.html
［3］http://xwangly.iteye.com/blog/1109424
［4］http://blog.csdn.net/lmj623565791/article/details/47017485

package service;import android.app.Service; import android.content.Intent; import android.os.Binder; import android.os.IBinder; import HttpURL.HttpUtil;/*** 創建綁定服務：通過繼承Binder類，來為客戶端提供IBinder接口（本地應用且為單進程）*/ public class MyService extends Service {IBinder mIBinder = new MyBinder();public class MyBinder extends Binder {public MyService getBinderService(){return MyService.this;}}@Overridepublic void onCreate() {}@Overridepublic IBinder onBind(final Intent intent) {new Thread(new Runnable() {@Overridepublic void run() {HttpUtil.downloadPicture(intent.getStringExtra("address"));}}).start();return mIBinder;}@Overridepublic boolean onUnbind(Intent intent) {return true;}@Overridepublic void onRebind(Intent intent) {}@Overridepublic void onDestroy() {} }

總結

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