应用程序在模拟器上完美显示但在设计预览上不显示? [英] App displays perfectly on emulator but not on design preview?

问题描述

解决方案三

3:从设置更新 sdk 或下载最著名的 Android sdk api"

进入你的android设置并打开sdk manager！下载任何其他 android api for android 完全安装它！

解决方案四

4 将您的 android studio 更新到最新的构建工具和最新的 API"

进入帮助菜单并按检查更新并遵守规则！

Edit: new image displaying rendering errors(first time asking a question, sorry if I've left anything out!) I haven't come across a solution for this. On google there's only solutions to the reverse of this where the emulator isn't showing what the design preview is! It must be something to with my themes because I have rendering problems: "Failed to find style 'textInputStyle' in current theme". However I've tried to switch between every theme with no improvement.

Honestly just confused as to why it would work perfectly on the emulator but not on the preview, It would be handier to have this function working rather than building and running for every single change, thanks!

This is my styles.xml: `

<!-- Base application theme. -->
<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
    <item name="android:textColor">@color/colorText</item>
    <item name="android:textColorHint">@color/colorText</item>
    <item name="colorControlNormal">@color/colorText</item>
    <item name="colorControlActivated">@color/colorText</item>
</style>

`

and the manifest:

<?xml version="1.0" encoding="utf-8"?>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name="com.example.cathy.myapplication.activities.LoginActivity"
        android:screenOrientation="portrait">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name="com.example.cathy.myapplication.activities.RegisterActivity"
        android:screenOrientation="portrait" />
    <activity
        android:name="com.example.cathy.myapplication.activities.UsersListActivity"
        android:screenOrientation="portrait" />
</application>

解决方案

There can be many reasons causing this issue! lets see them one by one!

In android studio cache is one issue so first follow the solution 1!

SOLUTION ONE

"1: INVALIDATING CACHE AND RESTART"

As in your provided styles you are not changing any builtin theme style then this input is one clear sign that android studio is not properly responding with the design part of the project that you require to build!

So GO to FILE menu ==> Invalidate Cache and Restart and see if that works! on restart ! this should!

SOLUTION TWO

"1: Selecting the proper design render sdk option"

In the image I encircled the option to select by default it select what's more suitable but Softwares do make tiny mistakes too! so try changing the sdk version there! if you have multiple sdk platforms installed for android! This will refresh the design in the design area!

SOLUTION Three

"3: Updating the sdk from settings or Downloading most famously used Android sdk api"

go in your settings of android and open sdk manager! download any other android api for android install it completely!

SOLUTION Four

"4 Update your android studio to latest build tools and latest apis"

Go in Help Menu and press Check for updates and follow the rules!

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