Java 我如何从改型2拦截器启动登录活动

如何在改型2拦截器内启动登录活动？我正在使用dagger2注入依赖项，有什么最佳实践吗？ 像这样说-我在LoginMvp.View mview上得到空指针

private final SharedPreferences preferences;
@Inject LoginMvp.View mview;
private String token;

@Inject
public AuthInterceptor(SharedPreferences preferences) {
    this.preferences = preferences;

}

public Response intercept(Chain chain) throws IOException {

    Request.Builder builder = chain.request().newBuilder();
    Request request = builder.build();
    Response response = chain.proceed(request);
    if (response.code() == 401) {

         //start login activity
         login();
    }
}

//should call start loginActivity via intent and call finish
public void logout() {
    mview.showLoginScreen();
}

---

您可以在应用程序上下文中创建应用程序上下文的静态对象，如下所示

public class App extends Application {
    public static App context;
    @Override
    public void onCreate() {
        super.onCreate();
        context = this;
    }
}

然后在AndroidManifest中将该类注册为

然后在mview.showLoginScreen（）方法中对应用程序上下文进行null检查，如果不是null，则将登录活动作为

Intent intent = new Intent(App.context, LoginActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | 
Intent.FLAG_ACTIVITY_CLEAR_TASK);
App.context.startActivity(intent)