可以测试

hxb

2022-11-22 b3513b1713bb979d0a69c5a8c4ddcd038f184e6e

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package com.mm.android.deviceaddmodule.helper; 
 
import android.app.Activity; 
 
import java.lang.reflect.Field; 
import java.lang.reflect.InvocationTargetException; 
import java.util.Map; 
 
public class ActivityHelper { 
    public static Activity getCurrentActivity () { 
        try { 
            Class activityThreadClass = Class.forName("android.app.ActivityThread"); 
            Object activityThread = activityThreadClass.getMethod("currentActivityThread").invoke( 
                    null); 
            Field activitiesField = activityThreadClass.getDeclaredField("mActivities"); 
            activitiesField.setAccessible(true); 
            Map activities = (Map) activitiesField.get(activityThread); 
            for (Object activityRecord : activities.values()) { 
                Class activityRecordClass = activityRecord.getClass(); 
                Field pausedField = activityRecordClass.getDeclaredField("paused"); 
                pausedField.setAccessible(true); 
                if (!pausedField.getBoolean(activityRecord)) { 
                    Field activityField = activityRecordClass.getDeclaredField("activity"); 
                    activityField.setAccessible(true); 
                    Activity activity = (Activity) activityField.get(activityRecord); 
                    return activity; 
                } 
            } 
        } catch (ClassNotFoundException e) { 
            e.printStackTrace(); 
        } catch (InvocationTargetException e) { 
            e.printStackTrace(); 
        } catch (NoSuchMethodException e) { 
            e.printStackTrace(); 
        } catch (NoSuchFieldException e) { 
            e.printStackTrace(); 
        } catch (IllegalAccessException e) { 
            e.printStackTrace(); 
        } 
        return null; 
    } 
}