我按着你的LoginActivity写了个TestActivity,但是出现以下错误

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java.lang.NullPointerException: Attempt to invoke interface method 'void mao.com.mao_wanandroid_client.presenter.test.TestsContract$TestView.showTestSuccess()' on a null object reference at mao.com.mao_wanandroid_client.presenter.test.TestPresenter$1.onSuccess(TestPresenter.java:60) at mao.com.mao_wanandroid_client.presenter.test.TestPresenter$1.onSuccess(TestPresenter.java:56) at mao.com.mao_wanandroid_client.model.http.control.BaseObserver.onNext(BaseObserver.java:30) at mao.com.mao_wanandroid_client.model.http.control.BaseObserver.onNext(BaseObserver.java:14) at io.reactivex.internal.operators.observable.ObservableObserveOn$ObserveOnObserver.drainNormal(ObservableObserveOn.java:200) at io.reactivex.internal.operators.observable.ObservableObserveOn$ObserveOnObserver.run(ObservableObserveOn.java:252) at io.reactivex.android.schedulers.HandlerScheduler$ScheduledRunnable.run(HandlerScheduler.java:109) at android.os.Handler.handleCallback(Handler.java:907) at android.os.Handler.dispatchMessage(Handler.java:105)

TestContract代码

/**

• @Author zes
• @Create 2019/9/19 17:09

• @Description */ public interface TestsContract { interface TestView extends BaseView { void showTestSuccess();

  void showTestFail(String errorMsg);

  }

  interface TestActivityPresenter extends AbstractBasePresenter { void getTest(Context context); } }

TestPresenter代码 /**

• @Author zes
• @Create 2019/9/19 14:34

• @Description */ public class TestPresenter extends RxBasePresenter implements TestsContract.TestActivityPresenter { private DataClient mDataClient;

  @Inject public TestPresenter(DataClient dataClient) { super(dataClient); this.mDataClient = dataClient; }

  //绑定View @Override public void attachView(TestsContract.TestView view) { super.attachView(view); }

  @Override public void getTest(Context context) { // Observable<ResponseBody<List>> homePageBannerObservable = mDataClient.GetHomePageBannerData(); // //获取 首页Banner 数据 // homePageBannerObservable.compose(RxSchedulers.observableIO2Main()) // .subscribe(new ProgressObserver<List>(context, context.getString(R.string.registered)) { // @Override // public void onSuccess(List result) { // mView.showTestSuccess(result.get(0) + ""); // } // // @Override // public void onFailure(Throwable e, String errorMsg) { // mView.showTestFail(errorMsg); // } // }); Observable<ResponseBody> responseBodyObservable = mDataClient.postLoginData("zes", "123456789"); responseBodyObservable.compose(RxSchedulers.observableIO2Main(context)) .subscribe(new ProgressObserver(context, context.getString(R.string.landing)) { @Override public void onSuccess(LoginData result) { Log.i("----------", Thread.currentThread().getName()); mView.showTestSuccess(); }

              @Override
              public void onFailure(Throwable e, String errorMsg) {
                  mView.showTestFail(errorMsg);
              }
          });

  } }

主TestActivity代码： /**

• @Author zes
• @Create 2019/9/19 14:33

• @Description */ public class TestActivity extends BaseActivity implements TestsContract.TestView { @BindView(R.id.toolbar) Toolbar mToolbar; @BindView(R.id.btn_click) Button btnClick; @BindView(R.id.tv_test) TextView mTv;

  @Override protected int getLayout() { return R.layout.activity_test; }

  @Override protected void initToolbar() { mToolbar.setTitle(getString(R.string.signin)); mToolbar.setTitleTextColor(Color.WHITE); setSupportActionBar(mToolbar); mToolbar.setNavigationIcon(R.drawable.ic_arrow_back_24dp); StatusBarUtil.setColorNoTranslucentLightMode(this, ContextCompat.getColor(this, R.color.colorPrimary)); mToolbar.setNavigationOnClickListener(v -> finish()); }

  @Override protected void onViewCreated() { //初始化的View位置

  }

  @Override protected void initEventAndData() { mTv.setText("数据请求结果显示"); }

  @OnClick({R.id.btn_click}) public void OnClickView(View view) { switch (view.getId()) { case R.id.btn_click: mPresenter.getTest(this); break; } }

  @Override public void showTestSuccess() { Log.i("----------", Thread.currentThread().getName()); finish(); }

  @Override public void showTestFail(String errorMsg) { mTv.setText(errorMsg); } }

每次请求成功后，调用 mView.showTestSuccess(),而主TestActivity中的 @Override public void showTestSuccess() { Log.i("----------", Thread.currentThread().getName()); finish(); } 报错了，我不知道咋回事，能否指点迷津。。。。