开发过程有时候会遇到多进程通信的问题，此时可以使用AIDL实现多进程间的通信,使用步骤如下:
1.创建AIDL文件
创建IGoodsManager.aidl,Goods.aidl, Goods.java代码如下：
IGoodsManager.aidl
package com.example.testaidl;
import com.example.testaidl.Goods;
// Declare any non-default types here with import statements
interface IGoodsManager {
List<Goods> getGoodsList();
void addGoods(in Goods goods);
}Goods.aidl
package com.example.testaidl;
// Declare any non-default types here with import statements
parcelable Goods;Goods.java
package com.example.testaidl;
import android.os.Parcel;
import android.os.Parcelable;
public class Goods implements Parcelable {
private String goodsDesc;
private double goodsPrice;
public Goods(String goodsDesc, double goodsPrice) {
this.goodsDesc = goodsDesc;
this.goodsPrice = goodsPrice;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(goodsDesc);
dest.writeDouble(goodsPrice);
}
@Override
public int describeContents() {
return 0;
}
public static final Parcelable.Creator<Goods> CREATOR = new Creator<Goods>() {
@Override
public Goods createFromParcel(Parcel source) {
return new Goods(source);
}
@Override
public Goods[] newArray(int size) {
return new Goods[size];
}
};
private Goods(Parcel in) {
goodsDesc = in.readString();
goodsPrice = in.readDouble();
}
@Override
public String toString() {
return "goods:" + goodsDesc + ", price:" + goodsPrice;
}
}结构如下所示：
如果提示Duplicate Class，请确保Goods.aidl已按照上面代码修改，并且重新sync一下项目，再不行的话就clean再build一下
2.服务端Services
GoodsService.java:
package com.example.testaidl;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
public class GoodsService extends Service {
private static final String TAG = "GoodsService";
private CopyOnWriteArrayList<Goods> goodsList = new CopyOnWriteArrayList<>();
private Binder mBinder = new IGoodsManager.Stub() {
@Override
public List<Goods> getGoodsList() {
Log.d(TAG, "getGoodsList" + goodsList);
return goodsList;
}
@Override
public void addGoods(Goods goods) {
Log.d(TAG, "addGoods " + goods);
goodsList.add(goods);
}
};
@Override
public void onCreate() {
super.onCreate();
goodsList.add(new Goods("car1", 500.0));
goodsList.add(new Goods("car2", 600.0));
}
@Override
public IBinder onBind(Intent intent) {
return mBinder;
}
}AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.example.testaidl">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
tools:ignore="GoogleAppIndexingWarning">
<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=".GoodsService"
android:process=":mute"> // 开启多进程
</service>
</application>
</manifest>3.客户端代码编写
MainActivity.java:
package com.example.testaidl;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;
import android.view.View;
import java.util.List;
public class MainActivity extends Activity implements View.OnClickListener {
private IGoodsManager goodsManager;
private boolean connected;
private int id = 0;
private static final String TAG = "MainActivity";
private ServiceConnection coonection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder service) {
goodsManager = IGoodsManager.Stub.asInterface(service);
connected = true;
}
@Override
public void onServiceDisconnected(ComponentName name) {
connected = false;
}
};
@Override
public void onClick(View v) {
if (connected && goodsManager != null) {
switch (v.getId()) {
case R.id.add:
id++;
try {
Log.d(TAG, "addGoods");
goodsManager.addGoods(new Goods("new Goods" + id, 200.0));
} catch (RemoteException e) {
e.printStackTrace();
}
break;
case R.id.get:
try {
List<Goods> goodsList = goodsManager.getGoodsList();
Log.d(TAG, "getGoodList:" + goodsList);
} catch (RemoteException e) {
e.printStackTrace();
}
break;
default:
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.add).setOnClickListener(this);
findViewById(R.id.get).setOnClickListener(this);
Intent intent = new Intent(getApplicationContext(), GoodsService.class);
bindService(intent, coonection, Context.BIND_AUTO_CREATE);
}
}4.实现效果
客户端日志：
2020-02-14 15:31:19.778 22746-22746/com.example.testaidl D/MainActivity: getGoodList:[goods:car1, price:500.0, goods:car2, price:600.0]
2020-02-14 15:31:41.909 22746-22746/com.example.testaidl D/MainActivity: addGoods
2020-02-14 15:31:43.207 22746-22746/com.example.testaidl D/MainActivity: getGoodList:[goods:car1, price:500.0, goods:car2, price:600.0, goods:new Goods1, price:200.0]
服务端日志：
2020-02-14 15:31:19.778 22765-22778/com.example.testaidl:mute D/GoodsService: getGoodsList[goods:car1, price:500.0, goods:car2, price:600.0]
2020-02-14 15:31:41.910 22765-22777/com.example.testaidl:mute D/GoodsService: addGoods goods:new Goods1, price:200.0
2020-02-14 15:31:43.206 22765-22778/com.example.testaidl:mute D/GoodsService: getGoodsList[goods:car1, price:500.0, goods:car2, price:600.0, goods:new Goods1, price:200.0]
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