RxAndroid2 / RxJava2簡單的CompletableObserver

CompletableObserver簡單的用法跟蹤一個任務的結束，不處理復雜的數據傳導，例如：

package zhangphil.app;import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v7.app.AppCompatActivity; import android.util.Log;import java.util.concurrent.Callable;import io.reactivex.Completable; import io.reactivex.CompletableObserver; import io.reactivex.android.schedulers.AndroidSchedulers; import io.reactivex.disposables.Disposable; import io.reactivex.schedulers.Schedulers;public class MainActivity extends AppCompatActivity {private final String TAG = getClass().getSimpleName();@Overridepublic void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);test();}private void test() {Completable.fromCallable(new Callable<Object>() {@Overridepublic Object call() throws Exception {try {Thread.sleep(5000);} catch (InterruptedException e) {e.printStackTrace();}Log.d(TAG, "任務結束！");return null;}}).subscribeOn(Schedulers.io()).observeOn(AndroidSchedulers.mainThread()).subscribe(getCompletableObserver());}private CompletableObserver getCompletableObserver() {return new CompletableObserver() {@Overridepublic void onSubscribe(Disposable d) {Log.d(TAG, "onSubscribe " + System.currentTimeMillis());}@Overridepublic void onComplete() {Log.d(TAG, "onComplete " + System.currentTimeMillis());}@Overridepublic void onError(Throwable e) {}};} }



代碼運行輸出：

05-16 14:01:20.908 12292-12292/zhangphil.app D/MainActivity: onSubscribe 1494914480908 05-16 14:01:20.945 12292-12292/zhangphil.app D/InputTransport: Input channel constructed: fd=73 05-16 14:01:20.945 12292-12292/zhangphil.app D/ViewRootImpl@99677a6[MainActivity]: setView = DecorView@de9b5e7[MainActivity] touchMode=true 05-16 14:01:20.949 12292-12292/zhangphil.app W/Activity: AppLock checkAppLockState locked:false verifying:false pkgName = zhangphil.app isInMultiWindowMode:false 05-16 14:01:20.985 12292-12292/zhangphil.app D/ViewRootImpl@99677a6[MainActivity]: MSG_RESIZED_REPORT: ci=Rect(0, 81 - 0, 0) vi=Rect(0, 81 - 0, 0) or=1 05-16 14:01:20.986 12292-12292/zhangphil.app D/ViewRootImpl@99677a6[MainActivity]: MSG_WINDOW_FOCUS_CHANGED 1 05-16 14:01:20.986 12292-12292/zhangphil.app I/InputMethodManager: [IMM] startInputInner - mService.startInputOrWindowGainedFocus 05-16 14:01:20.988 12292-12292/zhangphil.app D/InputTransport: Input channel constructed: fd=74 05-16 14:01:25.911 12292-23777/zhangphil.app D/MainActivity: 任務結束！ 05-16 14:01:25.912 12292-12292/zhangphil.app D/MainActivity: onComplete 1494914485912

總結

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