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Android Studio中没有设备屏幕

[英]No device screen in Android Studio

I'm having problems in Android Studio. 我在Android Studio中遇到问题。 I can't see device screen in activity_main.xml and fragment_main.xml, but as well I see it in content_main.xml. 我在activity_main.xml和fragment_main.xml中看不到设备屏幕,但在content_main.xml中也看到了它。 Also, I can't add any elements to screen. 另外,我无法在屏幕上添加任何元素。

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In the preview pane of right side try changing your API level to some lower or higher API it will most probably solve your issue. 在右侧的预览窗格中,尝试将您的API级别更改为较低或较高的API,这很可能会解决您的问题。

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