android进程间的通信方式：
一、Messenger
客户端：
public class MessengerClient extends Activity{ private Messenger mService; //private Messenger m @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Intent intent = new Intent(); intent.setAction("com.ryg.chapter.lanch"); intent.setPackage(getPackageName()); bindService(intent, mConnection, Context.BIND_AUTO_CREATE); } private ServiceConnection mConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { mService = new Messenger(service); Message msg = Message.obtain(null,MyConstance.MSG_CLIENT); Bundle data = new Bundle(); data.putString("msg_for_service","我是来自客户端的消息"); msg.setData(data); try { mService.send(msg); } catch (RemoteException e) { e.printStackTrace(); } } @Override public void onServiceDisconnected(ComponentName name) { } }; @Override protected void onDestroy() { unbindService(mConnection); super.onDestroy(); } }服务端：
import android.app.Service; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.util.Log; import com.ryg.chapter_2.utils.MyConstants; public class MessengerService extends Service { private static final String TAG = "MessengerService"; private static class MessengerHandler extends Handler { @Override public void handleMessage(Message msg) { switch (msg.what) { case MyConstants.MSG_FROM_CLIENT: Log.i(TAG, "receive msg from Client:" + msg.getData().getString("msg")); Messenger client = msg.replyTo; Message relpyMessage = Message.obtain(null, MyConstants.MSG_FROM_SERVICE); Bundle bundle = new Bundle(); bundle.putString("reply", "嗯，你的消息我已经收到，稍后会回复你。-----------"); relpyMessage.setData(bundle); try { client.send(relpyMessage); } catch (RemoteException e) { e.printStackTrace(); } break; default: super.handleMessage(msg); } } } private final Messenger mMessenger = new Messenger(new MessengerHandler()); @Override public IBinder onBind(Intent intent) { return mMessenger.getBinder(); } @Override public void onCreate() { super.onCreate(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { return super.onStartCommand(intent, flags, startId); } }3、AndroidManifest.xml配置：
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.ryg.chapter_2"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".IpcMessage.MessengerClient"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <service android:name=".IpcMessage.MessengerService" android:process=":jiangshuai"> <intent-filter> <action android:name="com.ryg.chapter.lanch"/> </intent-filter> </service> </application> </manifest>用aidl实现线程之间的通信：
项目结构：
1、IBookManager.aidl文件
package com.ryg.ipcaidl; import com.ryg.ipcaidl.Book; interface IBookManager { List<Book> getBookList(); void addBook(in Book book); }2、Book.aidl文件：
package com.ryg.ipcaidl; parcelable Book; 3、Book.java文件： import android.os.Parcel; import android.os.Parcelable; public class Book implements Parcelable { public int bookId; public String bookName; public Book() { } public Book(int bookId, String bookName) { this.bookId = bookId; this.bookName = bookName; } public int describeContents() { return 0; } public void writeToParcel(Parcel out, int flags) { out.writeInt(bookId); out.writeString(bookName); } public static final Creator<Book> CREATOR = new Creator<Book>() { public Book createFromParcel(Parcel in) { return new Book(in); } public Book[] newArray(int size) { return new Book[size]; } }; private Book(Parcel in) { bookId = in.readInt(); bookName = in.readString(); } @Override public String toString() { return String.format("[bookId:%s, bookName:%s]", bookId, bookName); } }4、客户端实现类：
import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.ServiceConnection; import android.os.IBinder; import android.os.RemoteException; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.util.Log; import java.util.List; public class BookClientActivity extends AppCompatActivity { private static final String TAG = "BookClientActivity"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Intent intent = new Intent(); intent.setAction("com.ryg.ipcaidl.launch"); intent.setPackage(getPackageName()); bindService(intent,mConnection, Context.BIND_AUTO_CREATE); } //获得与服务端链接 private ServiceConnection mConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { //调用aidl中stub的asinterface //将服务端的binder对象转化为客户端所需要的aidl接口对象 IBookManager bookManager = IBookManager.Stub.asInterface(service); try { List<Book> list = bookManager.getBookList(); Log.e(TAG, "获取所有书的type：" + list.getClass().getCanonicalName()); Log.e(TAG,"获取所有书的list :"+list.toString()); } catch (RemoteException e) { e.printStackTrace(); } } @Override public void onServiceDisconnected(ComponentName name) { } }; @Override protected void onDestroy() { unbindService(mConnection); super.onDestroy(); } } 5、服务端实现类： import android.app.Service; import android.content.Intent; import android.os.Binder; import android.os.IBinder; import android.os.RemoteException; import android.support.annotation.Nullable; import java.util.List; import java.util.concurrent.CopyOnWriteArrayList; /** * Created by apple on 17/5/7. */ public class BookManagerService extends Service{ private CopyOnWriteArrayList<Book> mBookList = new CopyOnWriteArrayList<Book>(); //创建一个binder对象 private Binder mBinder = new IBookManager.Stub(){//调用服务端aidl的stub中方法 @Override public List<Book> getBookList() throws RemoteException { return mBookList; } @Override public void addBook(Book book) throws RemoteException { mBookList.add(book); } }; @Override public void onCreate() { super.onCreate(); mBookList.add(new Book(1,"messenger study")); mBookList.add(new Book(2,"aidl study")); } @Nullable @Override public IBinder onBind(Intent intent) { return mBinder;//返回这个binder对象 } } 6、service在manifest中注册： <service android:name=".BookManagerService" android:process=":jiangshuai"> <intent-filter> <action android:name="com.ryg.ipcaidl.launch"/> </intent-filter> </service>