【安卓binder通訊第一階段】AIDL通訊玩一下binder(有幾個常見的坑)

這個通訊是一個client  ---service架構

我們先寫服務端的代碼，

一：我們先創建AIDL的接口，注意創建這個接口的路徑，到時候客戶端調用的時候要保證一致性。

 

interface ILeoAidl {
    void addPerson(in Person person);

    List<Person> getPersonList();
}

parcelable Person;

 

二：創建服務

<service
    android:name=".LeoAidlService"
    android:exported="true" />

public class LeoAidlService extends Service {

    private ArrayList<Person> persons;

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        persons = new ArrayList<>();
        Log.e("LeoAidlService", "success onBind");
        return iBinder;
    }

    private IBinder iBinder = new ILeoAidl.Stub() {
        @Override
        public void addPerson(Person person) throws RemoteException {
            persons.add(person);
        }

        @Override
        public List<Person> getPersonList() throws RemoteException {
            return persons;
        }
    };

    @Override
    public void onCreate() {
        super.onCreate();
        Log.e("LeoAidlService", "onCreate: success");
    }
}

 

三：創建實體類

 

public class Person implements Parcelable {

    private String name;
    private int grade;

    public Person(String name, int grade) {
        this.name = name;
        this.grade = grade;
    }

    protected Person(Parcel in) {
        this.name = in.readString();
        this.grade = in.readInt();
    }

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

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

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

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

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

四：在界面中啓動服務

startService(new Intent(this, LeoAidlService.class));

五：創建客戶端項目，將剛剛的接口按照同樣的路徑複製到客戶端中

 

六：在客戶端也定義一個接受類，一模一樣

七：在界面中綁定服務

 

public class MainActivity extends AppCompatActivity {
    private final static String TAG = "MainActivity";

    private ILeoAidl iLeoAidl;

    private Button btn;

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

        initView();
        bindService();
    }

    private void initView() {
        btn = (Button) findViewById(R.id.but_click);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                try {
                    iLeoAidl.addPerson(new Person("leo", 3));
                    List<Person> persons = iLeoAidl.getPersonList();
                    Log.e(TAG, persons.toString());
                } catch (RemoteException e) {
                    e.printStackTrace();
                }
            }
        });
    }

    private void bindService() {
        Intent intent = new Intent();
        intent.setComponent(new ComponentName("com.xx.leo_service", "com.xx.leo_service.LeoAidlService"));
        bindService(intent, connection, Context.BIND_AUTO_CREATE);
    }


    private ServiceConnection connection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            Log.e(TAG, "onServiceConnected: success");
            iLeoAidl = ILeoAidl.Stub.asInterface(service);
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
            Log.e(TAG, "onServiceDisconnected: success");
            iLeoAidl = null;
        }
    };

    @Override
    protected void onDestroy() {
        super.onDestroy();
        unbindService(connection);
    }
}

這樣就可以通訊了

有幾個常見的坑：

1：使用android studio，當我在某個aidl文件引用AIDL的時候，需要手動導包，一定要確認清楚。

2:注意parcelable聲明的AIDL所對應的的java實體類路徑名稱要一致 

3：客戶端AIDL所在的路徑名稱要和服務端一致