Android使用AIDL傳遞對象

廢話不多說，直接上代碼，首先是目錄

在app裏面定義aidl和Student類，然後把這兩個完全複製到btestsetvice裏面，注意包名也要相同

然後就是Student這個類了，這個類需要實現Parcelable接口

public class Student implements Parcelable {

    public int id;
    public String name;

    public Student(int id, String name) {
        this.id = id;
        this.name = name;
    }

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

    //此方法需要將成員按順序寫入
    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeInt(id);
        dest.writeString(name);
    }

    @Override
    public String toString() {
        return "Student{" +
                "id=" + id +
                ", name='" + name + '\'' +
                '}';
    }

    public static final Parcelable.Creator<Student> CREATOR = new ClassLoaderCreator<Student>() {
        @Override
        public Student createFromParcel(Parcel source, ClassLoader loader) {
            return null;
        }

        //此方法需要將成員按順序讀出並寫入
        @Override
        public Student createFromParcel(Parcel source) {

            int id = source.readInt();
            String name = source.readString();

            Student student = new Student(id, name);

            return student;
        }

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

然後定義兩個Aidl

1 Aaidl.aidl

package com.example.venn.aidltransclass;
import com.example.venn.aidltransclass.Student;

// Declare any non-default types here with import statements

interface AAidl {
    /**
     * Demonstrates some basic types that you can use as parameters
     * and return values in AIDL.
     */

    Student transClass();
}

這裏的package和import必須加，

2 Student.aidl

package com.example.venn.aidltransclass;
parcelable Student;

這裏的package必須加，否則報錯,然後就是Service

public class AService extends Service {
    public AService() {

    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO: Return the communication channel to the service.

        return aidl;
    }

    @Override
    public void onCreate() {
        super.onCreate();

        Log.d("student", "onCreate");
    }

    public AAidl.Stub aidl = new AAidl.Stub() {
        @Override
        public Student transClass() throws RemoteException {

            Student student = new Student(20, "Tom");
            return student;
        }
    };
}

最後就是客戶端的activity，

public class MainActivity extends Activity implements ServiceConnection {

    private AAidl mAidl;

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

        //Android 5.0之後只能通過這種方式綁定服務
        Intent intent = new Intent();
        intent.setAction("com.service.Aservice");
        intent.setPackage("com.example.venn.aidltransclass");
        bindService(intent, this, BIND_AUTO_CREATE);
    }

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {

        Log.d("student", "onServiceConnected");
        mAidl = AAidl.Stub.asInterface(service);
        try {
            Student student = mAidl.transClass();
            Log.d("student", student.toString());
        } catch (RemoteException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {

    }
}

服務端的清單文件

<service
    android:name=".AService"
    android:enabled="true"
    android:exported="true"
    >
    <intent-filter>
        <action android:name="com.service.Aservice"/>
    </intent-filter>
</service>

必須加action，用在intent.setAction裏面
運行結果
兩個Moudle，一個app，一個btestservice，在app內定義一個服務，在btestservice的MainActivity裏面綁定，然後打印出
綁定的服務裏面的對象