【Android】20.使用AIDL跨應用Service傳參

20.使用AIDL跨應用Service傳參

1.下載下傳素材。

本節素材源碼，請在公衆号回複" AS1214 "。

2.在SecondAPP裡，修改IMyServiceAidlInterface.aidl。

// IMyServiceAidlInterface.aidl
package jsz.nopi.secondapp;

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

interface IMyServiceAidlInterface {
    /**
     * 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);

    //通過此方法指派給info變量
    void setInfo(String info);
}

           

3.在SecondAPP裡，修改MyService。

public class MyService extends Service {

    //是否運作辨別符，true -> 運作
    private boolean running;
    //預設顯示的資訊
    private String info = "正在運作";

    public MyService() {
    }

    @Override
    public IBinder onBind(Intent intent) {
        return new IMyServiceAidlInterface.Stub() {
            @Override
            public void basicTypes(int anInt, long aLong, boolean aBoolean, float aFloat, double aDouble, String aString) throws RemoteException {

            }

            @Override
            public void setInfo(String info) throws RemoteException {
                MyService.this.info = info;
            }
        };
    }

    @Override
    public boolean onUnbind(Intent intent) {
        return super.onUnbind(intent);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        //擷取傳過來的資料，如果不為空則指派。
        String info = intent.getStringExtra("info");
        if (!TextUtils.isEmpty(info)) {
            this.info = info;
        }
        return super.onStartCommand(intent, flags, startId);
    }

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

        running = true;
        new Thread(new Runnable() {
            @Override
            public void run() {
                while (running) {
                    String str = info +"......";
                    System.out.println(str);
                    try {
                        sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }
        }).start();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        running = false;
    }
}
           

4.在SecondAPP裡，修改MainActivity。

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        startService(new Intent(this, MyService.class));
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        stopService(new Intent(this, MyService.class));
    }
}
           

5.在FirstAPP裡，建立一個aidl檔案夾，建立包名跟SecondAPP的aidl檔案夾下的包名一樣，把SecondAPP的aidl檔案複制到裡面。

6.在FirstAPP裡，修改MainActivity。

public class MainActivity extends AppCompatActivity implements View.OnClickListener, ServiceConnection {

    //聲明變量
    private Button btnStart;
    private Button btnStop;
    private Button btnBind;
    private Button btnUnBind;
    private Button btnSync;
    private EditText edit_info;
    private Intent intent;
    private IMyServiceAidlInterface binder;

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

        //執行個體化控件
        setContentView(R.layout.activity_main);
        btnStart = findViewById(R.id.btnStart);
        btnStop = findViewById(R.id.btnStop);
        btnBind = findViewById(R.id.btnBind);
        btnUnBind = findViewById(R.id.btnUnBind);
        btnSync = findViewById(R.id.btnSync);
        edit_info = findViewById(R.id.edit_info);

        //綁定事件
        btnStart.setOnClickListener(this);
        btnStop.setOnClickListener(this);
        btnBind.setOnClickListener(this);
        btnUnBind.setOnClickListener(this);
        btnSync.setOnClickListener(this);

        //執行個體化服務
        intent = new Intent();
        //設定為遠端服務(SecondAPP提供服務)
        intent.setComponent(new ComponentName("jsz.nopi.secondapp", "jsz.nopi.secondapp.MyService"));

    }

    //處理事件
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btnStart:
                //啟動服務并傳參
                intent.putExtra("info", edit_info.getText().toString());
                startService(intent);
                break;
            case R.id.btnStop:
                //停止服務
                stopService(intent);
                break;
            case R.id.btnBind:
                //綁定服務
                bindService(intent,this,BIND_AUTO_CREATE);
                break;
            case R.id.btnUnBind:
                //解綁服務
                unbindService(this);
                break;
            //同步服務
            case R.id.btnSync:
                try {
                    if (binder != null) {
                        //把值傳到MyService
                        binder.setInfo(edit_info.getText().toString());
                    }
                } catch (RemoteException e) {
                    e.printStackTrace();
                }
                break;
        }
    }

    //綁定服務成功後執行
    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        //指派MyService的Binder 給 MainActivity的Binder。
        //指派後可以調用 setInfo()方法傳參
        binder = IMyServiceAidlInterface.Stub.asInterface(service);
    }

    //onServiceDisconnected()方法在連接配接正常關閉的情況下是不會被調用的, 該方法隻在Service 被破壞了或者被殺死的時候調用.
    //例如, 系統資源不足, 要關閉一些Services, 剛好連接配接綁定的 Service 是被關閉者之一, 這個時候onServiceDisconnected() 就會被調用。
    @Override
    public void onServiceDisconnected(ComponentName name) {

    }
}
           

7.效果圖。