AIDL在Android studio里的写法

1.AIDL跨进程通信，先定义两个进程app1，app2

1.app1里 先定义一个service 在AndroidManifest.xml里注册 如下：

<service
            android:name=".MyService"
            android:exported="true">
            <intent-filter>
                <action android:name="com.lypeer.aidl" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
 </service>

public class MyService extends Service {
    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return mIMyAidlInterface;
    }

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

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {

        return super.onStartCommand(intent, flags, startId);
    }

    private IMyAidlInterface.Stub mIMyAidlInterface = new IMyAidlInterface.Stub() {
        @Override
        public String getName() throws RemoteException {
            return "test";
        }

        @Override
        public User getUser() throws RemoteException {
            return new User("xuelei");
        }
    };
}

2.app1里继续 在main下面创建个aidl文件夹，aidl下面创建个和包名一样的文件夹 ，里面放aidl格式的文件，

package com.example.lenovo.myapplication;

// Declare any non-default types here with import statements
import com.example.lenovo.myapplication.User;

interface IMyAidlInterface {
    /**
     * Demonstrates some basic types that you can use as parameters
     * and return values in AIDL.
     */
    String getName();

    User getUser();
}

//这是第二个文件
package com.example.lenovo.myapplication;
parcelable User;

3.app1里创建java类user

public class User implements Parcelable {

    private String name;

    public User(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }


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

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

    protected User(Parcel in) {
        this.name = in.readString();
    }

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

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

4.App2里 ，把app1的aidl的文件夹全部拷贝过来 包括app1的包名 要一模一样，在app2的java文件夹下新建app1包名的目录，里面放数据类user类，也是从app1里直接拷贝过来

5.app2里 直接用bindService调用 通过intent隐式

public class MainActivity extends AppCompatActivity {

    private IMyAidlInterface mIMyAidlInterface;

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

        Intent intent = new Intent();

        intent.setAction("com.lypeer.aidl");
        intent.setPackage("com.example.lenovo.myapplication");

        bindService(intent, new ServiceConnection() {
            @Override
            public void onServiceConnected(ComponentName componentName, IBinder iBinder) {
                mIMyAidlInterface = IMyAidlInterface.Stub.asInterface(iBinder);
            }

            @Override
            public void onServiceDisconnected(ComponentName componentName) {

            }
        }, BIND_AUTO_CREATE);

      findViewById(R.id.textview).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                try {
                    if (mIMyAidlInterface != null) {
                        User user = mIMyAidlInterface.getUser();
                        Toast.makeText(MainActivity.this, user.getName(), Toast.LENGTH_SHORT).show();
                    }

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

6.代码目录格式如图

微信图片_20190812175250.png