The use of Android studio Aidl

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1. All the code

Reference video ： Video link

1.MainActivity

package com.kunminx.aidlmukewangtest;

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.view.View;
import android.widget.Button;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
   
   

    private Button mBtConnect;
    private Button mBtDisConnect;
    private Button mBtIsConnected;

    private IConnectionService mConnectionService;
    private boolean connection=false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
   
   
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        Intent mIntent = new Intent(this, RemoteService.class);
        bindService(mIntent, new ServiceConnection() {
   
   
            @Override
            public void onServiceConnected(ComponentName name, IBinder service) {
   
   
                // initialization aidl Created interface 
                mConnectionService = IConnectionService.Stub.asInterface(service);
            }

            @Override
            public void onServiceDisconnected(ComponentName name) {
   
   

            }
        }, BIND_AUTO_CREATE);
    }

    private void initView() {
   
   
        mBtConnect = (Button) findViewById(R.id.bt_connect);
        mBtDisConnect = (Button) findViewById(R.id.bt_disConnect);
        mBtIsConnected = (Button) findViewById(R.id.bt_isConnected);

        mBtConnect.setOnClickListener(this);
        mBtDisConnect.setOnClickListener(this);
        mBtIsConnected.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
   
   
        switch (v.getId()) {
   
   
            case R.id.bt_connect:
                // Connect 
                try {
   
   
                    mConnectionService.connect();
                } catch (RemoteException e) {
   
   
                    e.printStackTrace();
                }
                break;
            case R.id.bt_disConnect:
                // To break off 
                try {
   
   
                    mConnectionService.disconnect();
                } catch (RemoteException e) {
   
   
                    e.printStackTrace();
                }
                break;
            case R.id.bt_isConnected:
                try {
   
   
                    connection = mConnectionService.isConnection();
                } catch (RemoteException e) {
   
   
                    e.printStackTrace();
                }
                Toast.makeText(this, String.valueOf(connection), Toast.LENGTH_SHORT).show();
                break;
        }
    }
}

2.RemoteService

package com.kunminx.aidlmukewangtest;

import android.app.Service;
import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.RemoteException;
import android.widget.Toast;

public class RemoteService extends Service {
   
   
    public RemoteService() {
   
   
    }
    // Set remote service status , The default is false（ Not connected ）
    private boolean isConnected=false;
    // The following three methods are carried out in the child thread of the new process , therefore Toast Use handle For thread communication 
    private Handler handler=new Handler(Looper.getMainLooper());
    private IConnectionService connectionService=new IConnectionService.Stub() {
   
   
        @Override
        public void connect() throws RemoteException {
   
   
            // Simulate new process time-consuming operations 
            try {
   
   
                Thread.sleep(3000);
                isConnected=true;
                handler.post(new Runnable() {
   
   
                    @Override
                    public void run() {
   
   
                        Toast.makeText(RemoteService.this, "connect", Toast.LENGTH_SHORT).show();
                    }
                });

            } catch (InterruptedException e) {
   
   
                e.printStackTrace();
            }
        }

        @Override
        public void disconnect() throws RemoteException {
   
   
            isConnected=false;
            handler.post(new Runnable() {
   
   
                @Override
                public void run() {
   
   
                    Toast.makeText(RemoteService.this, "disConnect", Toast.LENGTH_SHORT).show();
                }
            });
        }

        @Override
        public boolean isConnection() throws RemoteException {
   
   
            // Get connection status 
            return isConnected;
        }
    };
    @Override
    public IBinder onBind(Intent intent) {
   
   
        return connectionService.asBinder();
    }
}

3.IConnectionService.aidl

// IConnectionService.aidl
package com.kunminx.aidlmukewangtest;
//  Connection service 

interface IConnectionService {
   
   
    void connect();// Connect 
    void disconnect();// disconnect 
    boolean isConnection();// Get connection status 
}

4.AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.kunminx.aidlmukewangtest">

    <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=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service
            android:name=".RemoteService"
            android:enabled="true"
            android:exported="true"
            android:process=":remote"></service>
    </application>

</manifest>

5.activity_main.xml

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


    <Button
        android:id="@+id/bt_connect"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="connect" />

    <Button
        android:id="@+id/bt_disConnect"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="disConnect" />

    <Button
        android:id="@+id/bt_isConnected"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="isConnected" />
</LinearLayout>

2. step

1. Write a service class , It's a new process

public class RemoteService extends Service {
   
   
    public RemoteService() {
   
   
    }

    @Override
    public IBinder onBind(Intent intent) {
   
   
        // TODO: Return the communication channel to the service.
        throw new UnsupportedOperationException("Not yet implemented");
    }
}

<service
            android:name=".RemoteService"
            android:enabled="true"
            android:exported="true"
            android:process=":remote"></service>

android:process=":remote"： Running in a new process ,remote You can name it yourself

2.MainActivity binding RemoteServcie

Intent mIntent = new Intent(this, RemoteService.class);
        bindService(mIntent, new ServiceConnection() {
   
   
            @Override
            public void onServiceConnected(ComponentName name, IBinder service) {
   
   
                
            }

            @Override
            public void onServiceDisconnected(ComponentName name) {
   
   

            }
        }, BIND_AUTO_CREATE);

3. establish AIDL class

Name it IConnectionService（ This one can be named by itself ）
Then modify the method inside ：

// IConnectionService.aidl
package com.kunminx.aidlmukewangtest;
//  Connection service 

interface IConnectionService {
   
   
void connect();// Connect 
void disconnect();// disconnect 
boolean isConnection();// Get connection status 
}

Then compile , He'll be based on this AIDL class , Create the following code

4. Generated code content ：

BuildConfig ：

/**
 * Automatically generated file. DO NOT MODIFY
 */
package com.kunminx.aidlmukewangtest;

public final class BuildConfig {
   
   
  public static final boolean DEBUG = Boolean.parseBoolean("true");
  public static final String APPLICATION_ID = "com.kunminx.aidlmukewangtest";
  public static final String BUILD_TYPE = "debug";
  public static final int VERSION_CODE = 1;
  public static final String VERSION_NAME = "1.0";
}

IConnectionService ：

/*
 * This file is auto-generated.  DO NOT MODIFY.
 */
package com.kunminx.aidlmukewangtest;
//  Connection service 

public interface IConnectionService extends android.os.IInterface
{
   
   
  /** Default implementation for IConnectionService. */
  public static class Default implements com.kunminx.aidlmukewangtest.IConnectionService
  {
   
   
    @Override public void connect() throws android.os.RemoteException
    {
   
   
    }
    // Connect 

    @Override public void disconnect() throws android.os.RemoteException
    {
   
   
    }
    // disconnect 

    @Override public boolean isConnection() throws android.os.RemoteException
    {
   
   
      return false;
    }
    @Override
    public android.os.IBinder asBinder() {
   
   
      return null;
    }
  }
  /** Local-side IPC implementation stub class. */
  public static abstract class Stub extends android.os.Binder implements com.kunminx.aidlmukewangtest.IConnectionService
  {
   
   
    private static final java.lang.String DESCRIPTOR = "com.kunminx.aidlmukewangtest.IConnectionService";
    /** Construct the stub at attach it to the interface. */
    public Stub()
    {
   
   
      this.attachInterface(this, DESCRIPTOR);
    }
    /**
     * Cast an IBinder object into an com.kunminx.aidlmukewangtest.IConnectionService interface,
     * generating a proxy if needed.
     */
    public static com.kunminx.aidlmukewangtest.IConnectionService asInterface(android.os.IBinder obj)
    {
   
   
      if ((obj==null)) {
   
   
        return null;
      }
      android.os.IInterface iin = obj.queryLocalInterface(DESCRIPTOR);
      if (((iin!=null)&&(iin instanceof com.kunminx.aidlmukewangtest.IConnectionService))) {
   
   
        return ((com.kunminx.aidlmukewangtest.IConnectionService)iin);
      }
      return new com.kunminx.aidlmukewangtest.IConnectionService.Stub.Proxy(obj);
    }
    @Override public android.os.IBinder asBinder()
    {
   
   
      return this;
    }
    @Override public boolean onTransact(int code, android.os.Parcel data, android.os.Parcel reply, int flags) throws android.os.RemoteException
    {
   
   
      java.lang.String descriptor = DESCRIPTOR;
      switch (code)
      {
   
   
        case INTERFACE_TRANSACTION:
        {
   
   
          reply.writeString(descriptor);
          return true;
        }
        case TRANSACTION_connect:
        {
   
   
          data.enforceInterface(descriptor);
          this.connect();
          reply.writeNoException();
          return true;
        }
        case TRANSACTION_disconnect:
        {
   
   
          data.enforceInterface(descriptor);
          this.disconnect();
          reply.writeNoException();
          return true;
        }
        case TRANSACTION_isConnection:
        {
   
   
          data.enforceInterface(descriptor);
          boolean _result = this.isConnection();
          reply.writeNoException();
          reply.writeInt(((_result)?(1):(0)));
          return true;
        }
        default:
        {
   
   
          return super.onTransact(code, data, reply, flags);
        }
      }
    }
    private static class Proxy implements com.kunminx.aidlmukewangtest.IConnectionService
    {
   
   
      private android.os.IBinder mRemote;
      Proxy(android.os.IBinder remote)
      {
   
   
        mRemote = remote;
      }
      @Override public android.os.IBinder asBinder()
      {
   
   
        return mRemote;
      }
      public java.lang.String getInterfaceDescriptor()
      {
   
   
        return DESCRIPTOR;
      }
      @Override public void connect() throws android.os.RemoteException
      {
   
   
        android.os.Parcel _data = android.os.Parcel.obtain();
        android.os.Parcel _reply = android.os.Parcel.obtain();
        try {
   
   
          _data.writeInterfaceToken(DESCRIPTOR);
          boolean _status = mRemote.transact(Stub.TRANSACTION_connect, _data, _reply, 0);
          if (!_status && getDefaultImpl() != null) {
   
   
            getDefaultImpl().connect();
            return;
          }
          _reply.readException();
        }
        finally {
   
   
          _reply.recycle();
          _data.recycle();
        }
      }
      // Connect 

      @Override public void disconnect() throws android.os.RemoteException
      {
   
   
        android.os.Parcel _data = android.os.Parcel.obtain();
        android.os.Parcel _reply = android.os.Parcel.obtain();
        try {
   
   
          _data.writeInterfaceToken(DESCRIPTOR);
          boolean _status = mRemote.transact(Stub.TRANSACTION_disconnect, _data, _reply, 0);
          if (!_status && getDefaultImpl() != null) {
   
   
            getDefaultImpl().disconnect();
            return;
          }
          _reply.readException();
        }
        finally {
   
   
          _reply.recycle();
          _data.recycle();
        }
      }
      // disconnect 

      @Override public boolean isConnection() throws android.os.RemoteException
      {
   
   
        android.os.Parcel _data = android.os.Parcel.obtain();
        android.os.Parcel _reply = android.os.Parcel.obtain();
        boolean _result;
        try {
   
   
          _data.writeInterfaceToken(DESCRIPTOR);
          boolean _status = mRemote.transact(Stub.TRANSACTION_isConnection, _data, _reply, 0);
          if (!_status && getDefaultImpl() != null) {
   
   
            return getDefaultImpl().isConnection();
          }
          _reply.readException();
          _result = (0!=_reply.readInt());
        }
        finally {
   
   
          _reply.recycle();
          _data.recycle();
        }
        return _result;
      }
      public static com.kunminx.aidlmukewangtest.IConnectionService sDefaultImpl;
    }
    static final int TRANSACTION_connect = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);
    static final int TRANSACTION_disconnect = (android.os.IBinder.FIRST_CALL_TRANSACTION + 1);
    static final int TRANSACTION_isConnection = (android.os.IBinder.FIRST_CALL_TRANSACTION + 2);
    public static boolean setDefaultImpl(com.kunminx.aidlmukewangtest.IConnectionService impl) {
   
   
      // Only one user of this interface can use this function
      // at a time. This is a heuristic to detect if two different
      // users in the same process use this function.
      if (Stub.Proxy.sDefaultImpl != null) {
   
   
        throw new IllegalStateException("setDefaultImpl() called twice");
      }
      if (impl != null) {
   
   
        Stub.Proxy.sDefaultImpl = impl;
        return true;
      }
      return false;
    }
    public static com.kunminx.aidlmukewangtest.IConnectionService getDefaultImpl() {
   
   
      return Stub.Proxy.sDefaultImpl;
    }
  }
  public void connect() throws android.os.RemoteException;
  // Connect 

  public void disconnect() throws android.os.RemoteException;
  // disconnect 

  public boolean isConnection() throws android.os.RemoteException;
}

5. stay RemoteService Write code

Realization aidl Code

// Set remote service status , The default is false（ Not connected ）
    private boolean isConnected=false;
    // The following three methods are carried out in the child thread of the new process , therefore Toast Use handle For thread communication 
    private Handler handler=new Handler(Looper.getMainLooper());
    private IConnectionService connectionService=new IConnectionService.Stub() {
   
   
        @Override
        public void connect() throws RemoteException {
   
   
            // Simulate new process time-consuming operations 
            try {
   
   
                Thread.sleep(3000);
                isConnected=true;
                handler.post(new Runnable() {
   
   
                    @Override
                    public void run() {
   
   
                        Toast.makeText(RemoteService.this, "connect", Toast.LENGTH_SHORT).show();
                    }
                });

            } catch (InterruptedException e) {
   
   
                e.printStackTrace();
            }
        }

        @Override
        public void disconnect() throws RemoteException {
   
   
            isConnected=false;
            handler.post(new Runnable() {
   
   
                @Override
                public void run() {
   
   
                    Toast.makeText(RemoteService.this, "disConnect", Toast.LENGTH_SHORT).show();
                }
            });
        }

        @Override
        public boolean isConnection() throws RemoteException {
   
   
            // Get connection status 
            return isConnected;
        }
    };

Back out ：

@Override
    public IBinder onBind(Intent intent) {
   
   
        return connectionService.asBinder();
    }

6. To write MainActivity, Realize three buttons ： Connect , disconnect , Get connection status , Implement monitoring

xml

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


    <Button
        android:id="@+id/bt_connect"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="connect" />

    <Button
        android:id="@+id/bt_disConnect"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="disConnect" />

    <Button
        android:id="@+id/bt_isConnected"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="isConnected" />
</LinearLayout>

The shortcut initializes and listens for the button

private void initView() {
   
   
        mBtConnect = (Button) findViewById(R.id.bt_connect);
        mBtDisConnect = (Button) findViewById(R.id.bt_disConnect);
        mBtIsConnected = (Button) findViewById(R.id.bt_isConnected);

        mBtConnect.setOnClickListener(this);
        mBtDisConnect.setOnClickListener(this);
        mBtIsConnected.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
   
   
        switch (v.getId()) {
   
   
            case R.id.bt_connect:
                
                break;
            case R.id.bt_disConnect:

                break;
            case R.id.bt_isConnected:

                break;
        }
    }

7. initialization AIDL Created java The class interface

stay ServiceConnected The rewrite method of onServiceConnected In the initialization

Code ：

// initialization aidl Created interface 
                mConnectionService = IConnectionService.Stub.asInterface(service);

8. Calling method ：

Code ：

Connect

// Connect 
                try {
   
   
                    mConnectionService.connect();
                } catch (RemoteException e) {
   
   
                    e.printStackTrace();
                }

disconnect

// To break off 
                try {
   
   
                    mConnectionService.disconnect();
                } catch (RemoteException e) {
   
   
                    e.printStackTrace();
                }

Get connection status ：

try {
   
   
                    connection = mConnectionService.isConnection();
                } catch (RemoteException e) {
   
   
                    e.printStackTrace();
                }
                Toast.makeText(this, String.valueOf(connection), Toast.LENGTH_SHORT).show();

3. Reflection and summary

1.

2.

3.

4.

5.

6.