园龄：3年10个月粉丝：1 关注：5

Android AIDL相关

【好奇驱动学习】AIDL是Android接口定义语言（Android Interface definition language）它是一种android内部进程通信接口的描述语言,通过它我们可以定义进程间的通信（IPC）接口，从而满足进程间通信的需求。

创建AIDL文件

在src/main下创建aidl文件夹，在文件夹中创建.aidl文件

在文件中写下业务方法

在Build菜单中选择rebuild project

重新编译项目后，安卓的SDK工具会在build目录生成与之对应的，同名的.java文件

编写布局的xml

在布局文件中增加按钮和文本展示

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <Button
        android:id="@+id/bind"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="绑定服务"/>
    <Button
        android:id="@+id/unbind"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="解绑服务"/>
    <TextView
        android:id="@+id/text_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="text"/>

</LinearLayout>

创建远程服务类

package com.example.aidlapplication;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.Process;
import android.os.RemoteException;

public class RemoteDataService extends Service {


    public RemoteDataService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        return binder;
    }


    private final IMyAidlInterface.Stub binder = new IMyAidlInterface.Stub() {
        private String data;

        @Override
        public void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat, double aDouble, String aString) throws RemoteException {

        }

        @Override
        public void setData(String data) throws RemoteException {
            this.data = data;
        }

        @Override
        public String getData() throws RemoteException {
            return " === data is === " + data + " === process id === " + Process.myPid();
        }
    };
}

修改MainActivity

package com.example.aidlapplication;

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 android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity implements OnClickListener {

    private static final String TAG = "MainActivity";
    private IMyAidlInterface iMyAidlInterface;


    private TextView textView;
    private Button bind;
    private Button unbind;
    private Boolean isUnbind = false;

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

    private void init() {
        textView = findViewById(R.id.text_view);
        bind = findViewById(R.id.bind);
        unbind = findViewById(R.id.unbind);
        bind.setOnClickListener(this);
        unbind.setOnClickListener(this);
    }

    public void bindMyService(View view) {
        Log.v(TAG, "==绑定服务==");
        Intent intent = new Intent(this, RemoteDataService.class);
        bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);
        isUnbind = false;

    }

    public void unbindMyService(View view) {
        Log.v(TAG, "==解绑服务==");
        // 可多次解绑
        if (!isUnbind) {
            unbindService(serviceConnection);
            textView.setText("服务已解绑");
            isUnbind = true;
        }

    }


    private ServiceConnection serviceConnection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            iMyAidlInterface = IMyAidlInterface.Stub.asInterface(service);
            Log.v(TAG, "业务对象==>" + iMyAidlInterface);
            try {
                iMyAidlInterface.setData("inputData");
                String data = iMyAidlInterface.getData();
                textView.setText("调用服务:" + data);
            } catch (RemoteException e) {
                e.printStackTrace();
            }
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            Log.v(TAG, "==服务中断调用==");
        }
    };


    @Override
    public void onClick(View v) {
        int id = v.getId();
        switch (id) {
            case R.id.bind:
                bindMyService(v);
                break;
            case R.id.unbind:
                unbindMyService(v);
                break;
            default:
                break;
        }
    }


}

远程调用

将上面的工程app装载在安卓机器上后，重新创建一个新的APP项目

aidl文件增加

这里将上个APP的文件拷过来，同时保证目录也相同，重新rebuild下项目

xml配置

<?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"
    tools:context=".MainActivity">


    <Button
        android:id="@+id/call_remote"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="远程调用"/>
    <TextView
        android:id="@+id/call_textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!" />

</LinearLayout>

MainActivity修改

package com.example.wxbremoteserviceclient;

import androidx.appcompat.app.AppCompatActivity;

import android.annotation.SuppressLint;
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.os.RemoteException;
import android.widget.Button;
import android.widget.TextView;

import com.example.aidlapplication.IMyAidlInterface;

public class MainActivity extends AppCompatActivity {
    private Button callBut;
    private TextView callView;

    private IMyAidlInterface serviceProxy;

    private ServiceConnection connection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            // 获取远程服务代理
            serviceProxy = IMyAidlInterface.Stub.asInterface(service);
            try {
                serviceProxy.setData("我是来自远程的client调用");
                String data = serviceProxy.getData();
                callView.setText(data);
            } catch (RemoteException e) {
                e.printStackTrace();
            }
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {

        }
    };

    @SuppressLint("MissingInflatedId")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        callBut = findViewById(R.id.call_remote);
        callView = findViewById(R.id.call_textView);

        callBut.setOnClickListener(v -> {
            // 跳转的时候intent中需要放this，Activity.class,这里不需要放
            Intent intent = new Intent();
            //重点：这里必须要加上包的名称
            intent.setPackage("com.example.aidlapplication");
            intent.setAction("com.example.aidlapplication.REMOTE_SERVICE");
            bindService(intent, connection, Service.BIND_AUTO_CREATE);
        });

    }
}