在非活动类中获取当前活动上下文

Question

我在android中有一个应用程序，它没有。的活动。现在我需要在非活动类中正在运行的活动的上下文。我怎么能得到它。

Answer 1

您可以使用Application类：

public class MyApplication extends Application { 
private static Context context; 
private static Activity activity; 

public void onCreate() { 
    super.onCreate(); 
    MyApplication.context = getApplicationContext(); 
} 

public synchronized static Context getAppContext() { 
    return MyApplication.context; 
} 

/** 
* setCurrentActivity(null) in onPause() on each activity 
* setCurrentActivity(this) in onResume() on each activity 
* 
*/ 

public static void setCurrentActivity(Activity currentActivity) { 
    activity = currentActivity; 
} 

public static Activity currentActivity() { 
    return activity; 
} 

}