• 两APP通信之AIDL使用。

    1.效果展示

    无效果无真相，先上图，以下为Service App和Client App两App间的跨进程通信

    AIDL实现两应用通信

    在这里插入图片描述
    在这里插入图片描述

    2.新建服务端AIDL文件

    在main路径下新建AIDL文件
    在这里插入图片描述

    a. IMsgReceiveListener

    // IMsgReceiveListener.aidl
package com.scash.aidlservice;

// Declare any non-default types here with import statements
//用于接收两App的消息接口回调
import com.scash.aidlservice.Msg;//导入要传输对象的包
interface IMsgReceiveListener {
   void onReceiveMsg(in Msg msg);
}

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    b. IMsgManagerListener

    // IMsgManagerListener.aidl
package com.scash.aidlservice;

// Declare any non-default types here with import statements
import com.scash.aidlservice.Msg;//导入要传输对象的包
import com.scash.aidlservice.IMsgReceiveListener;
interface IMsgManagerListener {
     void sendMsg(in Msg msg);
     void registerListener(IMsgReceiveListener receiveListener);
     void unRegisterListener(IMsgReceiveListener receiveListener);
}

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    c. Msg

    // Msg.aidl
package com.scash.aidlservice;
// Declare any non-default types here with import statements
parcelable Msg;

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    d. 然后Rebuild Project

    在这里插入图片描述

    3.编写Msg（AIDL传输只能是Parcelable对象）

    package com.scash.aidlservice;

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

/**
 * @create 2022/6/17
 * @Describe  AIDL 传输对象时，只能传输实现Parcelable接口的对象
 */
public class Msg implements Parcelable {
    private String msg;
    private String type;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    protected Msg(Parcel in) {
        msg = in.readString();
        type = in.readString();
    }

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

        @Override
        public Msg[] newArray(int size) {
            return new Msg[size];
        }
    };

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(msg);
        dest.writeString(type);
    }
}

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    4.编写RemotoService

    package com.scash.aidlservice

import android.app.Service
import android.content.Intent
import android.os.IBinder
import android.os.RemoteCallbackList
import android.util.Log

/**
 * @create 2022/6/17
 * @Describe
 */
open class RemotoService : Service() {
    //AIDL不支持正常的接口回调，使用RemoteCallbackList实现接口回调
    val mReceiveListener: RemoteCallbackList<IMsgReceiveListener> =
        RemoteCallbackList<IMsgReceiveListener>()

    override fun onBind(intent: Intent?): IBinder? {
        return iBinder
    }

    val iBinder = object : IMsgManagerListener.Stub() {
        override fun sendMsg(msg: Msg?) {
            msg?.let { receiveMsg(it) }
        }

        override fun registerListener(receiveListener: IMsgReceiveListener?) {
            mReceiveListener.register(receiveListener)
        }

        override fun unRegisterListener(receiveListener: IMsgReceiveListener?) {
            val success = mReceiveListener.unregister(receiveListener)
            Log.i("Ljw", "注册是否成功:$success")
        }

    }

    fun receiveMsg(message: Msg) {
        //通知Callback循环开始,返回N为实现mReceiveListener回调的个数
        var Num = mReceiveListener.beginBroadcast()
        message.msg = message.msg
        repeat(Num) {
            val listener: IMsgReceiveListener = mReceiveListener.getBroadcastItem(it)
            listener.onReceiveMsg(message)
        }
        //通知通知Callback循环结束
        mReceiveListener.finishBroadcast()
    }
}

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    注册Service

     <service
            android:name=".RemotoService"
            android:exported="true" />

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    5.编写MsgAdapter（接收消息适配器）

    /**
 * @create 2022/6/23
 * @Describe
 */
class MsgAdapter(val context: Context, val mList: List<Msg>) :
    RecyclerView.Adapter<MsgAdapter.MyViewHolder>() {
    inner class MyViewHolder(view: View) : RecyclerView.ViewHolder(view) {
        val mTvMsg :TextView= view.findViewById(R.id.tv_msg)
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
        val view = LayoutInflater.from(context)
            .inflate(R.layout.item_msg, parent, false)
        return MyViewHolder(view)
    }

    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
        val mSimpleDateFormat = SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
        (mSimpleDateFormat.format(Date(mList[position].date)) + mList[position].msg).also {
            holder.mTvMsg.text = it
        }
    }

    override fun getItemCount(): Int {
       return mList.size
    }
}

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    6.编写MainActivity

    class MainActivity : AppCompatActivity(), View.OnClickListener {
    val binding by lazy { ActivityMainBinding.inflate(layoutInflater) }
    var binder: MyBinder? = null
    var mManagerListener: IMsgManagerListener? = null
    var msgAdapter: MsgAdapter? = null
    var mList: ArrayList<Msg> = ArrayList()
    var mBtnClickStamp: Long = 0//记录按键点击的时间戳
    var mMsg = Msg()
    val mHandler = object : Handler(Looper.getMainLooper()) {
        override fun handleMessage(msg: Message) {
            super.handleMessage(msg)
            if (msg.what == 1) {
                msgAdapter?.notifyDataSetChanged()
                binding.rvClient.smoothScrollToPosition(mList.size - 1)
            }
        }
    }
    var mConnection = object : ServiceConnection {
        override fun onServiceConnected(name: ComponentName?, iBinder: IBinder?) {
            binder = iBinder as MyBinder
            mManagerListener = IMsgManagerListener.Stub.asInterface(iBinder)
            mManagerListener?.registerListener(mReceiveListener)
        }

        override fun onServiceDisconnected(name: ComponentName?) {
            TODO("Not yet implemented")
        }

    }
    val mReceiveListener = object : IMsgReceiveListener.Stub() {
        override fun onReceiveMsg(msg: Msg?) {
            if (IMsgType.CLIENT == msg?.type) {
                msg.date = System.currentTimeMillis()
                mList.add(msg)
                mHandler.sendEmptyMessage(1)
            }
        }

    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(binding.root)
        var intent = Intent(this, RemotoService::class.java)
        bindService(intent, mConnection, BIND_AUTO_CREATE)
        msgAdapter = MsgAdapter(this, mList)
        binding.rvClient.layoutManager =
            LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)
        binding.rvClient.adapter = msgAdapter
        binding.btnSend.setOnClickListener(this)
    }

    override fun onDestroy() {
        super.onDestroy()
        mManagerListener?.unRegisterListener(mReceiveListener)
        unbindService(mConnection)
    }

    fun isBtnBuffering(): Boolean {
        var duration = System.currentTimeMillis() - mBtnClickStamp
        mBtnClickStamp = System.currentTimeMillis()//记录点击时间
        return Math.abs(duration) <= 400
    }

    override fun onClick(v: View?) {
        if (isBtnBuffering()) {
            return
        }
        if (TextUtils.isEmpty(binding.etSendMsg.text.toString())) {
            Toast.makeText(this, "不能发送空数据", Toast.LENGTH_SHORT).show()
        }
        mMsg.msg = binding.etSendMsg.text.toString()
        mMsg.type = IMsgType.SERVICE
        binder?.sendMsg(mMsg)

    }
}

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    7.新建客户端AIDL文件（跟服务端一致即可）

    在这里插入图片描述

    8.创建客户端传输对象，注意包名要和服务端一致。（路径如下图）在这里插入图片描述

    /**
 * @create 2022/6/17
 * @Describe AIDL 传输对象时，只能传输实现Parcelable接口的对象
 */
public class Msg implements Parcelable {
    private String msg;
    private String type;
    private long date;

    public Msg() {

    }

    public Msg(String msg, String type) {
        this.msg = msg;
        this.type = type;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public long getDate() {
        return date;
    }

    public void setDate(long date) {
        this.date = date;
    }

    protected Msg(Parcel in) {
        msg = in.readString();
        type = in.readString();
    }

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

        @Override
        public Msg[] newArray(int size) {
            return new Msg[size];
        }
    };

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(msg);
        dest.writeString(type);
    }
}

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    9.编写MsgAdapter

    
/**
 * @create 2022/6/22
 * @Describe
 */
class MsgAdapter(val context: Context, val mList: List<Msg>) :
    RecyclerView.Adapter<MsgAdapter.MyViewHolder>() {


    inner class MyViewHolder(view: View) : RecyclerView.ViewHolder(view) {
        val tvMsg: TextView = view.findViewById(R.id.tv_msg)
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
        val view = LayoutInflater.from(context)
            .inflate(R.layout.item_msg, parent, false)
        return MyViewHolder(view)
    }

    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
        val mSimpleDateFormat = SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
        (mSimpleDateFormat.format(Date(mList[position].date)) + mList[position].msg).also {
            holder.tvMsg.text = it
        }
    }

    override fun getItemCount(): Int {
        return mList.size
    }
}

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    10.编写客户端MainActivity

    
class MainActivity : AppCompatActivity() {
    val binding by lazy { ActivityMainBinding.inflate(layoutInflater) }
    var mMsgManger: IMsgManagerListener? = null//定义AIDL
    var myBinder: IMsgManagerListener? = null//定义AIDL
    var mAdapter: MsgAdapter? = null
    val mList = ArrayList<Msg>()

    val mHandler = object : Handler(Looper.getMainLooper()) {
        override fun handleMessage(msg: Message) {
            super.handleMessage(msg)
            if (msg.what == 1) {
                mAdapter?.notifyDataSetChanged()
                binding.rvItem.smoothScrollToPosition(mList.size - 1)
            }
        }
    }
    var mReceiverMsgListener = object : IMsgReceiveListener.Stub() {

        override fun onReceiveMsg(msg: Msg?) {
            if (IMsgType.SERVICE == msg?.type) {
                msg.date=System.currentTimeMillis()
                mList.add(msg)
                mHandler.sendEmptyMessage(1)
            }
        }

    }
    var mConnection = object : ServiceConnection {
        override fun onServiceConnected(name: ComponentName?, iBinder: IBinder?) {
            myBinder = IMsgManagerListener.Stub.asInterface(iBinder);
            mMsgManger = IMsgManagerListener.Stub.asInterface(iBinder)
            //链接到死亡代理
            mMsgManger?.asBinder()?.linkToDeath(mDeathRecipient, 0)
            //注册监听
            mMsgManger?.registerListener(mReceiverMsgListener)
        }

        override fun onServiceDisconnected(name: ComponentName?) {

        }

    }

    var mDeathRecipient = object : IBinder.DeathRecipient {
        override fun binderDied() {
            if (mMsgManger == null) {
                return
            }
            mMsgManger!!.asBinder().unlinkToDeath(this, 0)
            mMsgManger = null
        }
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(binding.root)
        val intent = Intent()
        intent.action = "com.scash.aidlservice.RemotoService"
        intent.`package` = "com.scash.aidlservice"
        bindService(intent, mConnection, BIND_AUTO_CREATE)
        mAdapter = MsgAdapter(this, mList)
        binding.rvItem.layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL,false)
        binding.rvItem.adapter = mAdapter
        val btn: Button = findViewById(R.id.btn_client_send)
        btn.setOnClickListener {
            val mMsg = Msg()
            mMsg.msg = binding.etSendMsgTest.text.toString()
            mMsg.type = IMsgType.CLIENT
            mMsgManger?.sendMsg(mMsg)
        }
//        binding.btnClientSend.setOnClickListener {
//            mMsgManger?.sendMsg(mMsg)
//        }
    }

    override fun onDestroy() {
        super.onDestroy()
        unbindService(mConnection)
        mMsgManger?.unRegisterListener(mReceiverMsgListener)
    }
}

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  • 原文地址：https://blog.csdn.net/qq_38363506/article/details/125336496