Android Studio 3.1.3 存在约束布局问题 [英] Android Studio 3.1.3 having issues with Constraint layout

问题描述

我正在尝试在这里开始一个新项目，但出现了这个问题.我可以运行该项目并将其部署在模拟器中，但是这个渲染问题和使用私有资源让我很不爽.我已经尝试了在互联网上找到的所有可能的解决方案，但它无法解决问题

I'm trying to start a new project here but this problem is appearing. I can run the project and deploy it in an emulator but this Render problem and Using private resources is ticking me off. I've already tried all the possible solutions found in the internet but it just can't solve the problem

<?xml version="1.0" encoding="utf

<android.support.constraint.ConstraintLayout 
   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"
   app:layout_behavior="@string/appbar_scrolling_view_behavior"
   tools:context=".MainActivity"
   tools:showIn="@layout/activity_main">

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Hello World!" />

</android.support.constraint.ConstraintLayout>

风格

<resources>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>


</style>

<style name="AppTheme.NoActionBar">
    <item name="windowActionBar">false</item>
    <item name="windowNoTitle">true</item>
</style>

<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

Build.gradle

Build.gradle

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.acer.myapplication3"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner 
"android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 
'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'com.android.support:design:28.0.0-alpha3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso- core:3.0.2'
}

推荐答案

遇到了同样的问题 - 去 SDK manager 并安装了其他 SDK 平台；奥利奥 8.1.问题似乎是新"API 28 仍然存在问题.它说部分安装，但我基本上只是检查了较低 API 的框并下载/安装:

Had the same issue - went to SDK manager and installed additional SDK platforms; Oreo 8.1. It seems the issue was that the 'new' API 28 still has issues. It says partially installed, but I basically just checked the boxes for lower API's and it downloaded/installed:

此外，我更改了 build.gradle 文件的 SDK 版本、buildTools、appcompat 和设计版本，如下所示.现在它可以工作了，当这些问题得到解决后，我将在稍后阶段返回到 API 28.

Additionally, I changed my build.gradle file's SDK version, buildTools, appcompat, and design versions as below. It works now and I will move back to API 28 at a later stage when these issues have been resolved.

apply plugin: 'com.android.application'

android {
compileSdkVersion 27
buildToolsVersion '27.0.3'
defaultConfig {
    ...
    minSdkVersion 15
    targetSdkVersion 27
    ...

dependencies {
implementation 'com.android.support:appcompat-v7:27.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.2'
implementation 'com.android.support:design:27.0.0'
}

这篇关于Android Studio 3.1.3 存在约束布局问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！