Question

我有一个Observable改变了edittext的值，edittext中的值将被传递给观察者并将其设置为textview，如图所示在下面的代码中。

我要做的是取消订阅观察。请帮我取消订阅观察，我的尝试是在代码belwo

//How to subscribe
//widgetObservable.unsubscribeOn();
//widgetObservable.unsafeSubscribe();
//widgetObservable.doOnUnsubscribe();

码：

public class MainActivity extends AppCompatActivity {

private static final String TAG = MainActivity.class.getSimpleName();
private TextView mTextView = null;
private EditText mEditText = null;
private View mButton  = null;
private rx.Observable<String> widgetObservable = null;

Subscriber widgetSubscriber = new Subscriber<String>() {
    @Override
    public void onCompleted() {
        Log.i(TAG, "onCompleted");
    }

    @Override
    public void onError(Throwable e) {
        Log.i(TAG, "onError: " + e.getMessage().toString());
    }

    @Override
    public void onNext(String  str) {
        Log.i(TAG, "onNext: " + str);
        mTextView.setText(str);
    }
};

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

    mTextView = (TextView) findViewById(R.id.textview);
    mEditText = (EditText) findViewById(R.id.editText);
    mButton = findViewById(R.id.button);

    mButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            widgetObservable.subscribe(widgetSubscriber);

            //How to subscribe
            //widgetObservable.unsubscribeOn();
            //widgetObservable.unsafeSubscribe();
            //widgetObservable.doOnUnsubscribe();
        }
    });

    widgetObservable = rx.Observable.create(new rx.Observable.OnSubscribe<String>() {
        @Override
        public void call(Subscriber<? super String> subscriber) {
            subscriber.onNext(mEditText.getText().toString());
            subscriber.onCompleted();
        }
    });
}

}

Answer 1

添加此内容！

@Override
protected void onDestroy() {
    super.onDestroy();
    widgetObservable.unsubscribe();
}

Answer 2

private Subscription subscription;


subscription = widgetObservable.subscribe(widgetSubscriber);


if (subscription != null) {
  subscription.unsubscribe()
}

unsubscibe应该在Activity的onDestroy方法

中完成

如何取消订阅RxAndroid

2 个答案: