AIDL=Android Interface definition language

interface IMyAidlInterface {
/**
     * Demonstrates some basic types that you can use as parameters
     * and return values in AIDL.
     */
void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat,
double aDouble, String aString);

String getName(String nickName);
}

<service
android:name=".aidl.AIDLService"
android:process="com.aidl.test.service"
android:enabled="true"
android:exported="true">
</service>

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;
import android.support.annotation.Nullable;

import com.syz.lianxi.IMyAidlInterface;

public class AIDLService extends Service {

IMyAidlInterface.Stub mStub = new IMyAidlInterface.Stub(){

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

        }

        @Override
public String getName(String nickName) throws RemoteException {
return nickName + "aidl_hahaha";
}
    };

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

activity

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

import com.syz.lianxi.IMyAidlInterface;
import com.syz.lianxi.R;

public class AIDLActivity extends Activity {

ServiceConnectionmServiceConnection = new ServiceConnection() {
        @Override
public void onServiceConnected(ComponentName name, IBinder service) {
            mIMyAidlInterface = IMyAidlInterface.Stub.asInterface(service);
}

        @Override
public void onServiceDisconnected(ComponentName name) {

        }
    };

    private IMyAidlInterface mIMyAidlInterface;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

setContentView(R.layout.activity_aidl);

findViewById(R.id.button_aidl).setOnClickListener(new View.OnClickListener() {
            @Override
public void onClick(View v) {
if(mIMyAidlInterface!=null){
try {
                        String name = mIMyAidlInterface.getName("nick_know_maco");
Toast.makeText(AIDLActivity.this, name + "", Toast.LENGTH_LONG).show();
} catch (RemoteException e) {
                        e.printStackTrace();
}
                }
            }
        });

bindService(new Intent(this, AIDLService.class), mServiceConnection, Context.BIND_AUTO_CREATE);
}

}

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

public class Person implements Parcelable {

    String mName;
    int mAge;
String mAvatarUrl;

    public String getName() {
return mName;
}

public void setName(String name) {
        mName = name;
}

public int getAge() {
return mAge;
}

public void setAge(int age) {
        mAge = age;
}

public String getAvatarUrl() {
return mAvatarUrl;
}

public void setAvatarUrl(String avatarUrl) {
        mAvatarUrl = avatarUrl;
}

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

    @Override
public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(this.mName);
dest.writeInt(this.mAge);
dest.writeString(this.mAvatarUrl);
}

public Person() {
    }

protected Person(Parcel in) {
this.mName = in.readString();
        this.mAge = in.readInt();
        this.mAvatarUrl = in.readString();
}

public static final Parcelable.Creator<Person> CREATOR = new Parcelable.Creator<Person>() {
public Person createFromParcel(Parcel source) {
return new Person(source);
}

public Person[] newArray(int size) {
return new Person[size];
}
    };
}