我找不到让我们团队满意的解决方案，所以我们就自己动手了。我们使用ActivityLifecycleCallbacks来跟踪当前活动，然后通过服务公开它。更多详情请访问:https://stackoverflow.com/a/38650587/10793

waqas716的答案很好。我针对需要更少代码和维护的特定情况创建了一个变通方案。

我通过一个静态方法从我怀疑是在前景的活动中获取一个视图，找到了一个特定的工作。 您可以遍历所有活动并检查您是否希望或从martin的回答中获得活动名称

ActivityManager am = (ActivityManager)context.getSystemService(Context.ACTIVITY_SERVICE);
ComponentName cn = am.getRunningTasks(1).get(0).topActivity; 

然后我检查视图是否为空，并通过getContext()获取上下文。

View v = SuspectedActivity.get_view();

if(v != null)
{
    // an example for using this context for something not 
    // permissible in global application context. 
    v.getContext().startActivity(new Intent("rubberduck.com.activities.SomeOtherActivity"));
}

一个相当简单的解决方案是创建一个单例管理器类，你可以在其中存储一个或多个活动的引用，或者你想在整个应用程序中访问的任何其他东西。

调用UberManager.getInstance()。setMainActivity(activity);在主活动的onCreate中。

.getMainActivity调用UberManager.getInstance () ();在应用程序的任何地方检索它。(我使用这个能够使用吐司从一个非UI线程。)

确保您添加了对UberManager.getInstance().cleanup()的调用;当你的应用程序被销毁时。

import android.app.Activity;

public class UberManager
{
    private static UberManager instance = new UberManager();

    private Activity mainActivity = null;

    private UberManager()
    {

    }

    public static UberManager getInstance()
    {
        return instance;
    }

    public void setMainActivity( Activity mainActivity )
    {
        this.mainActivity = mainActivity;
    }

    public Activity getMainActivity()
    {
        return mainActivity;
    }

    public void cleanup()
    {
        mainActivity = null;
    }
}

我在Kotlin中做了以下工作

Create Application Class Edit the Application Class as Follows class FTApplication: MultiDexApplication() { override fun attachBaseContext(base: Context?) { super.attachBaseContext(base) MultiDex.install(this) } init { instance = this } val mFTActivityLifecycleCallbacks = FTActivityLifecycleCallbacks() override fun onCreate() { super.onCreate() registerActivityLifecycleCallbacks(mFTActivityLifecycleCallbacks) } companion object { private var instance: FTApplication? = null fun currentActivity(): Activity? { return instance!!.mFTActivityLifecycleCallbacks.currentActivity } } } Create the ActivityLifecycleCallbacks class class FTActivityLifecycleCallbacks: Application.ActivityLifecycleCallbacks { var currentActivity: Activity? = null override fun onActivityPaused(activity: Activity?) { currentActivity = activity } override fun onActivityResumed(activity: Activity?) { currentActivity = activity } override fun onActivityStarted(activity: Activity?) { currentActivity = activity } override fun onActivityDestroyed(activity: Activity?) { } override fun onActivitySaveInstanceState(activity: Activity?, outState: Bundle?) { } override fun onActivityStopped(activity: Activity?) { } override fun onActivityCreated(activity: Activity?, savedInstanceState: Bundle?) { currentActivity = activity } } you can now use it in any class by calling the following: FTApplication.currentActivity()

在你的应用程序中创建一个类名ActivityManager (java)

public class ActivityManager implements Application.ActivityLifecycleCallbacks {

    private Activity activity;


    public ActivityManager(App myApplication) {
        myApplication.registerActivityLifecycleCallbacks(this);
    }

    public Activity getActivity(){
        return activity;
    }
    @Override
    public void onActivityCreated(@NonNull Activity activity, @Nullable Bundle bundle) {
        this. activity = activity;

    }

    @Override
    public void onActivityStarted(@NonNull Activity activity) {
       this. activity = activity;
    }

    @Override
    public void onActivityResumed(@NonNull Activity activity) {
        this. activity = activity;

    }

    @Override
    public void onActivityPaused(@NonNull Activity activity) {

    }

    @Override
    public void onActivityStopped(@NonNull Activity activity) {

    }

    @Override
    public void onActivitySaveInstanceState(@NonNull Activity activity, @NonNull Bundle bundle) {

    }

    @Override
    public void onActivityDestroyed(@NonNull Activity activity) {

    }
}

然后在应用程序(kotlin)中初始化它

class App : Application() {

    override fun onCreate() {
     
        appOpenManager =  AppOpenManager(this);
    }
  companion object {
        lateinit var appOpenManager: AppOpenManager
    }
}

然后用like

App.activityManager.getActivity ()

getCurrentActivity()也在ReactContextBaseJavaModule中。 (因为这个问题最初被问到，许多Android应用程序也有ReactNative组件-混合应用程序。)

ReactNative中的类ReactContext有一整套逻辑来维护在getCurrentActivity()中返回的mCurrentActivity。

注:我希望getCurrentActivity()在Android应用程序类中实现。