在Android Studio警告新ns映射到旧ns

Question

apply plugin: 'com.android.application'

android {
    compileSdkVersion 30
    buildToolsVersion '30.0.2'
    defaultConfig {
        applicationId "com.etas.etas"
        minSdkVersion 16
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    //noinspection GradleDependency
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation files('libs/jtds-1.2.7.jar')
    implementation files('libs/ksoap.jar')
    implementation 'com.android.support:appcompat-v7:30.2'
    implementation 'androidx.appcompat:appcompat:1.3.1'
    implementation 'com.android.support:design:30.2'
    implementation 'com.google.firebase:firebase-appindexing:20.0.0'
    implementation 'com.android.support:support-v4:30.2'
}

`

Answer 1

尝试删除并重新安装SDK平台。

中删除文件夹

如果您是Linux用户：

 ~/Android/Sdk/platforms

C:\Users\USERNAME\AppData\Local\Android\Sdk