我在 Android Studio 上的设计视图是空白的.它不会改变.我也尝试过与 gradle build 同步.该怎么办? [英] My design view on Android Studio is blank. It doesn't change. I have tried syncing with gradle build too. What to do?

问题描述

XML 代码:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<TextView
    android:layout_width="34dp"
    android:layout_height="53dp"
    android:text="Hello World!"
    android:textAppearance="@style/TextAppearance.AppCompat"
    android:visibility="visible" />

</LinearLayout

需要尽快帮助.该怎么办??

Need help asap.What to do??

推荐答案

我昨天更新了 android studio 后遇到了同样的问题，转到 Gradle 脚本 -> Build.Gradle(Module:app)

I had the same problem yesterday after updating android studio, Go to Gradle Scripts -> Build.Gradle(Module:app)

将 alpha3 更改为 alpha1

change alpha3 to alpha1

        implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'

到

        implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'

注意:此解决方案不再适用，因为版本代码已更新，稳定版本已发布

Note: This solution doesn't work anymore as version codes have been updated, stable version has been released

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