Android使用AIDL实现两个App间通信

package com.example.wang.client.bean;

import android.os.Parcel;
import android.os.Parcelable;

public class OrderBean implements Parcelable{
 private String id;
 private String name;
 private int amount;

 public OrderBean(){}

 public OrderBean(String id, String name, int amount) {
 this.id = id;
 this.name = name;
 this.amount = amount;
 }

 protected OrderBean(Parcel in) {
 id = in.readString();
 name = in.readString();
 amount = in.readInt();
 }

 public static final Creator<OrderBean> CREATOR = new Creator<OrderBean>() {
 @Override
 public OrderBean createFromParcel(Parcel in) {
  return new OrderBean(in);
 }

 @Override
 public OrderBean[] newArray(int size) {
  return new OrderBean[size];
 }
 };
 @Override
 public int describeContents() {
 return 0;
 }

 @Override
 public void writeToParcel(Parcel dest, int flags) {
 dest.writeString(id);
 dest.writeString(name);
 dest.writeInt(amount);
 }
 //get/set方法略
}

 // OrderBean.aidl
package com.example.wang.client.bean;//存放的包路径同bean类
parcelable OrderBean;//通信用到的Parcelable需要声明，并且使用小写的parcelable

// IBookManager.aidl
package com.example.wang.client.aidl;

import com.example.wang.client.bean.OrderBean;//除了系统提供的对象，都需要明确导入

interface IOrderManager {
 List<OrderBean> getAll();
 void add(in OrderBean bean);
}

#activity_main.xml - 主页面布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical">
 <TextView
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_gravity="center_horizontal"
 android:layout_marginTop="5dp"
 android:text="订单管理"
 android:textSize="20dp"/>
 <LinearLayout
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:padding="5dp">
 <Button
  android:id="@+id/search_button"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:textSize="15dp"
  android:text="刷新订单"/>
 <Button
  android:id="@+id/add_button"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:textSize="15dp"
  android:text="添加订单"/>
 </LinearLayout>
 <android.support.v7.widget.RecyclerView
 android:id="@+id/recyclerView"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 />
</LinearLayout>

//MainActivity.java
package com.example.wang.client;
...
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
 private List<OrderBean> orderList;
 private IOrderManager orderManager;
 //UI
 private Button search_button;
 private Button add_button;
 private RecyclerView recyclerView;
 private OrderAdapter adapter;

 ServiceConnection conn = new ServiceConnection() {//这个最重要，用于连接Service
 @Override
 public void onServiceConnected(ComponentName name, IBinder service) {
  Log.i("MainActivity.conn","@@ onServiceConnected name="+name);
  IOrderManager manager = IOrderManager.Stub.asInterface(service);
  orderManager = manager;
  refreshOrderList();
  try {
  service.linkToDeath(deathRecipient, 0);
  } catch (RemoteException e) {
  e.printStackTrace();
  }
 }

 @Override
 public void onServiceDisconnected(ComponentName name) {
  Log.i("MainActivity.conn","@@ onServiceDisconnected name="+name);
 }
 };
 IBinder.DeathRecipient deathRecipient = new IBinder.DeathRecipient() {//注册一个死亡代理，监测连接状态
 @Override
 public void binderDied() {
  Log.i("MainActivity","@@ binderDied "+(orderManager==null));
  if(orderManager==null){
  return;
  }
  orderManager.asBinder().unlinkToDeath(deathRecipient, 0);
  orderManager = null;
  //重新绑定
  bindOrderService();
 }
 };
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 Log.i("MainActivity","@@ onCreate");
 setContentView(R.layout.activity_main);
 getLayoutInflater();
 //view
 search_button=findViewById(R.id.search_button);
 add_button=findViewById(R.id.add_button);
 recyclerView=findViewById(R.id.recyclerView);
 //组装recyclerView
 LinearLayoutManager linearLayoutManager=new LinearLayoutManager(this);
 linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
 recyclerView.setLayoutManager(linearLayoutManager);
 adapter=new OrderAdapter(this);
 recyclerView.setAdapter(adapter);
 //onclick
 search_button.setOnClickListener(this);
 add_button.setOnClickListener(this);
 //bind
 bindOrderService();
 }
 private void bindOrderService(){
 Intent intent = new Intent("com.example.wang.ordermanager.OrderService");
 intent.setPackage("com.example.wang.ordermanager");
 intent.addCategory(Intent.CATEGORY_LAUNCHER);
 bindService(intent, conn, Context.BIND_AUTO_CREATE);
 }
 /**
 * 重新获取数据并刷新列表。
 */
 private void refreshOrderList(){
 try {
  if(orderManager!=null){
  orderList = orderManager.getAll();
  }
  if(orderList!=null){
  adapter.setData(orderList);
  adapter.notifyDataSetChanged();
  }
 } catch (RemoteException e) {
  e.printStackTrace();
 }
 }

 @Override
 public void onClick(View v) {
 if(v==search_button){
  //刷新订单
  refreshOrderList();
 }else if(v==add_button){
  //增加订单
  try {
  OrderBean orderBean=new OrderBean();
  Random random=new Random();
  orderBean.setAmount(random.nextInt(800)+100);
  orderBean.setId(random.nextInt(100000000)+100000+"");
  orderBean.setName("玩具"+random.nextInt());
  orderManager.add(orderBean);
  refreshOrderList();
  } catch (RemoteException e) {
  e.printStackTrace();
  }
 }
 }

 @Override
 protected void onDestroy() {
 super.onDestroy();
 unbindService(conn);
 }
}

//OrderService.java
package com.example.wang.ordermanager;
...

public class OrderService extends Service{
 private CopyOnWriteArrayList<OrderBean> list = new CopyOnWriteArrayList<>();

 @Override
 public void onCreate() {
 super.onCreate();
 Log.i("OrderService","@@ onCreate");

 }

 @Nullable
 @Override
 public IBinder onBind(Intent intent) {
 Log.i("OrderService","@@ onBind");
 return binder;
 }

 Binder binder = new IOrderManager.Stub(){

 @Override
 public List<OrderBean> getAll() throws RemoteException {
  return list;
 }

 @Override
 public void add(OrderBean bean) throws RemoteException {
  list.add(bean);
 }
 };

}

<service android:name=".OrderService"
  android:enabled="true"
  android:exported="true">
  <intent-filter>
  <action android:name="com.example.wang.ordermanager.OrderService"/>
  <category android:name="android.intent.category.LAUNCHER" />
  </intent-filter>
 </service>