android 基础一

2022-07-29 19:37:53

一、服务端

第一步：创建aidl文件

package com.example.servicetest;

interface IScan {
    void startScan();
    void stopScan();
}

第二步：创建service 以及实现IScan.Stub抽象类

public class MyService extends Service {
   @Override
    public IBinder onBind(Intent intent) {
        Log.e(TAG, "onBind！");
        return iScan;
    }

     IScan.Stub iScan = new IScan.Stub() {
        @Override
        public void startScan() throws RemoteException {
            Log.e(TAG, "开始扫描！");
        }

        @Override
        public void stopScan() throws RemoteException {
            Log.e(TAG, "停止扫描！");
        }
    };

   ........
}

第三步：配置清单文件，因为需要提供给第三方app调用服务，所以需要增加一个action

  <service android:name=".MyService"
            android:enabled="true"
            android:exported="true">
            <intent-filter>
                <action android:name="com.servicetest.scan"/>
            </intent-filter>
   </service>

服务端完整代码

public class MyService extends Service {

    String TAG = "MyService";
    @Override
    public IBinder onBind(Intent intent) {
        Log.e(TAG, "onBind！");
        return iScan;
    }

    @Override
    public boolean onUnbind(Intent intent) {
        Log.e(TAG, "onUnbind！");
        return super.onUnbind(intent);
    }

    @Override
    public void onCreate() {
        super.onCreate();
        Log.e(TAG, "onCreate！");
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.e(TAG, "onDestroy！");
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.e(TAG, "onStartCommand！");
        return super.onStartCommand(intent, flags, startId);
    }

    IScan.Stub iScan = new IScan.Stub() {
        @Override
        public void startScan() throws RemoteException {
            Log.e(TAG, "开始扫描！");
        }

        @Override
        public void stopScan() throws RemoteException {
            Log.e(TAG, "停止扫描！");
        }
    };

}

二、客户端

第一步，创建一个和服务端一模一样的aidl文件 (包名，文件名，接口都必须一样)

package com.example.servicetest;

interface IScan {
    void startScan();
    void stopScan();
}

第二步，绑定服务获取服务接口

        Intent intent=new Intent();
        intent.setAction("com.servicetest.scan");
        intent.setPackage("com.example.servicetest");//必须指定当前app的包名
        bindService(intent,new 
        ServiceConnect(),BIND_AUTO_CREATE);


    private class ServiceConnect implements ServiceConnection {
         @Override
         public void onServiceConnected(ComponentName name, IBinder service) {
               iScan = IScan.Stub.asInterface(service);//将service转换成 服务接口

         }
         @Override
         public void onServiceDisconnected(ComponentName name) {
             Log.e("MyService","onServiceDisconnected！");
         }
    }

备注：1. android 5.0之后anction 必须指定包名。

2.必须通过 asInterface将转换服务接口。

客户端完整代码

public class MainActivity extends Activity {

    IScan iScan;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Intent intent=new Intent();
        intent.setAction("com.servicetest.scan");
        intent.setPackage("com.example.servicetest");
        bindService(intent,new ServiceConnect(),BIND_AUTO_CREATE);
    }

    public void startScan(View view){
        try {
            iScan.startScan();
        } catch (RemoteException e) {
            Log.e("MyService","e="+e.toString());
        }
    }

    private class ServiceConnect implements ServiceConnection {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
               iScan = IScan.Stub.asInterface(service);
        }
        @Override
        public void onServiceDisconnected(ComponentName name) {
            Log.e("MyService","onServiceDisconnected！");
        }
    }
}

asInterface

android 基础一 <Service aidl跨进程通讯>

码农公寓

相关文章