這期內(nèi)容當(dāng)中小編將會給大家?guī)碛嘘P(guān)使用RxJava怎么取消訂閱，文章內(nèi)容豐富且以專業(yè)的角度為大家分析和敘述，閱讀完這篇文章希望大家可以有所收獲。
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Consumer類型
Observable創(chuàng)建返回Disposable取消
重慶分公司
重慶分公司
public class SecondActivity extends AppCompatActivity {
private static final String TAG = "SecondActivity";
private Disposable disposable;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
disposable = Observable.create(new ObservableOnSubscribe() {
@Override
public void subscribe(ObservableEmitter emitter) throws Exception {
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Consumer() {
@Override
public void accept(String s) throws Exception {
Log.d(TAG, "accept: "+s);
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.d(TAG, "onDestroy: ");
//取消訂閱
if(disposable != null && !disposable.isDisposed()){
disposable.dispose();
Log.d(TAG, "onDestroy: dispose");
}
}
} 普通類型Observer
在Observer中獲取Disposable然后取消
public class ThirdActivity extends AppCompatActivity {
private static final String TAG = "ThirdActivity";
Disposable disposable;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_third);
Observable.create(new ObservableOnSubscribe() {
@Override
public void subscribe(ObservableEmitter emitter) throws Exception {
try {
Thread.sleep(5000);
emitter.onNext("testInfo");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer() {
@Override
public void onSubscribe(Disposable d) {
disposable = d;
}
@Override
public void onNext(String s) {
Log.d(TAG, "onNext: "+s);
}
@Override
public void onError(Throwable e) {
Log.d(TAG, "onError: ");
}
@Override
public void onComplete() {
Log.d(TAG, "onComplete: ");
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.d(TAG, "onDestroy: ");
//然后在需要取消訂閱的地方調(diào)用即可
if (disposable != null && !disposable.isDisposed()) {
Log.d(TAG, "dispose: ");
disposable.dispose();
}
}
} DisposableObserver類型
利用DisposableObserver和SubscribeWith直接返回Disposable，然后取消
public class FourthActivity extends AppCompatActivity {
private static final String TAG = "FourthActivity";
private DisposableObserver observer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_fourth);
observer = Observable.create(new ObservableOnSubscribe() {
@Override
public void subscribe(ObservableEmitter emitter) throws Exception {
try {
Thread.sleep(5000);
emitter.onNext("testInfo");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribeWith(new DisposableObserver() {
@Override
public void onNext(String o) {
Log.d(TAG, "onNext: "+o);
}
@Override
public void onError(Throwable e) {
Log.d(TAG, "onError: ");
}
@Override
public void onComplete() {
Log.d(TAG, "onComplete: ");
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
if (observer != null && !observer.isDisposed()) {
Log.d(TAG, "dispose: ");
observer.dispose();
}
}
} 取消多個Observer
把多個Observer添加CompositeDisposable，一次取消
public class ComDisposableActivity extends AppCompatActivity {
private Disposable disposable1;
private Disposable disposable2;
private static final String TAG = "ComDisposableActivity";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_com_disposable);
Observable.create(new ObservableOnSubscribe() {
@Override
public void subscribe(ObservableEmitter emitter) throws Exception {
try {
Thread.sleep(5000);
emitter.onNext("testInfo");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.doOnDispose(new Action() {
@Override
public void run() throws Exception {
Log.d(TAG, "run: Unsubscribing subscription from onCreate()");
}
})
.subscribe(new Observer() {
@Override
public void onSubscribe(Disposable d) {
disposable1 = d;
}
@Override
public void onNext(String s) {
Log.d(TAG, "onNext: "+s);
}
@Override
public void onError(Throwable e) {
Log.d(TAG, "onError: ");
}
@Override
public void onComplete() {
Log.d(TAG, "onComplete: ");
}
});
Observable.create(new ObservableOnSubscribe() {
@Override
public void subscribe(ObservableEmitter emitter) throws Exception {
try {
Thread.sleep(5000);
emitter.onNext("testInfo");
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer() {
@Override
public void onSubscribe(Disposable d) {
disposable2 = d;
}
@Override
public void onNext(String s) {
Log.d(TAG, "onNext: "+s);
}
@Override
public void onError(Throwable e) {
Log.d(TAG, "onError: ");
}
@Override
public void onComplete() {
Log.d(TAG, "onComplete: ");
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
CompositeDisposable compositeDisposable = new CompositeDisposable();
//批量添加
compositeDisposable.add(disposable1);
compositeDisposable.add(disposable2);
//最后一次性全部取消訂閱
compositeDisposable.dispose();
}
} RxLifecyle取消
OnDestory取消
Observable.interval(1, TimeUnit.SECONDS)
.doOnDispose(new Action() {
@Override
public void run() throws Exception {
Log.d(TAG, "Unsubscribing bindToLifecycle from onDestroy()");
}
})
.compose(this.bindToLifecycle())
.subscribe(new Consumer() {
@Override
public void accept(Long num) throws Exception {
Log.d(TAG, "accept: " + num);
}
}); 指定生命周期取消
Observable.interval(1,TimeUnit.SECONDS)
.doOnDispose(new Action() {
@Override
public void run() throws Exception {
Log.d(TAG, "Unsubscribing UbindUntilEvent from onPause()");
}
}).compose(this.bindUntilEvent(ActivityEvent.PAUSE))
.subscribe(new Consumer() {
@Override
public void accept(Long aLong) throws Exception {
Log.d(TAG, "bindUntilEvent accept: " + aLong);
}
}); 上述就是小編為大家分享的使用RxJava怎么取消訂閱了，如果剛好有類似的疑惑，不妨參照上述分析進(jìn)行理解。如果想知道更多相關(guān)知識，歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道。
