Question

我构建这个应用程序只是为了学习android。当我尝试在其上调用方法时，它表示服务绑定为null。编译正常并在运行时失败。谢谢你的帮助！

将loadAnimals（）移动到onServiceConnected（）后出现新错误：

11-14 11:09:50.610 2978-2978/? E/AndroidRuntime: java.lang.RuntimeException: Unable to resume activity {com.jacob_w.animalList/com.jacob_w.animalList.MainActivity}: java.lang.IllegalArgumentException: Service Intent must be explicit: Intent { act=com.jacob_w.animalList.IAnimalInterface }

主要逻辑片段：

public class AnimalListFragment extends ListFragment implements ServiceConnection {
    IAnimalInterface mAnimalInterfaceBinder = null;

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        mAnimalInterfaceBinder = IAnimalInterface.Stub.asInterface(service);
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {
        mAnimalInterfaceBinder = null;
    }

    @Override
    public void onResume() {
        super.onResume();
        getActivity().bindService(new Intent("com.jacob_w.animalList.IAnimalInterface"), this,
            Context.BIND_AUTO_CREATE);

    }

    @Override
    public void onPause() {
        getActivity().unbindService(this);
        super.onPause();
    }

    public void loadAnimals() {
        SystemClock.sleep(2000);

        AnimalList animalList;
        try {
            animalList = mAnimalInterfaceBinder.getAnimalList();
        }
        catch (RemoteException e) {}
    }
}

AIDL界面：

import com.jacob_w.animalList.AnimalList;

interface IAnimalInterface {
    AnimalList getAnimalList();
}

对象定义：

parcelable AnimalList;

服务：

public class AnimalService extends Service {
    private AnimalList animalList = null;

    @Override
    public IBinder onBind(Intent intent) {
        return mAnimalInterfaceBinder;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return Service.START_REDELIVER_INTENT;
    }

    public void updateAnimals() {
        return animalList; // Stub
    }

    private final IAnimalInterface.Stub mAnimalInterfaceBinder = new IAnimalInterface.Stub() {
        public AnimalList getAnimalList() {
            return animalList;
        }
    }
}

对象：

public final class AnimalList implements Parcelable {
    public String[] animals;
    public String[] links;

    public AnimalList(String[] animals, String[] links) {
        this.animals = animals;
        this.links = links;
    }

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

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

    private AnimalList(Parcel animalParcel) {
        animals = animalParcel.createStringArray();
        links = animalParcel.createStringArray();
    }

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

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeStringArray(animals);
        dest.writeStringArray(links);
    }
}

Android服务绑定null

0 个答案: