类型com.example.myhouse.MainActivity被定义多次

Question

编译代码时出错。

键入com.example. myHouse . mainactivity多次定义:C:UsersHPAndroidStudioProjectsmyHouseappbuildtmpkotlin-classesdebugcomexample myHouse MainActivity.class, C:UsersHPAndroidStudioProjectsmyHouseappbuildintermediatesjavacdebugclassescomexample myHouse MainActivity.class

Gradle文件

plugins {
id 'com.android.application'
id 'com.google.gms.google-services'
id 'org.jetbrains.kotlin.android'
}
apply plugin: 'kotlin-android'

android {
compileSdk 31
defaultConfig {
applicationId "com.example.myhouse"
minSdk 21
targetSdk 31
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
buildFeatures {
viewBinding true
}
}
dependencies {
implementation("com.google.code.gson:gson:2.3.1")
implementation 'androidx.appcompat:appcompat:1.0.0'
implementation 'com.google.android.material:material:1.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.2'
implementation 'androidx.gridlayout:gridlayout:1.0.0'
implementation 'com.google.firebase:firebase-auth:21.0.1'
implementation 'androidx.annotation:annotation:1.3.0'
implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.4.0'
implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.4.0'
implementation 'androidx.legacy:legacy-support-v4:1.0.0'
implementation 'com.google.firebase:firebase-database:20.0.3'
implementation 'androidx.navigation:navigation-fragment:2.3.5'
implementation 'androidx.navigation:navigation-ui:2.3.5'
def lifecycle_version = "2.2.0"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
implementation "com.google.android.material:material:$version"
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
// Import the BoM for the Firebase platform
implementation platform('com.google.firebase:firebase-bom:29.0.3')
// Declare the dependency for the Firebase Authentication library
// When using the BoM, you don't specify versions in Firebase library dependencies
implementation 'com.google.firebase:firebase-auth'
// Also declare the dependency for the Google Play services library and specify its version
implementation 'com.google.android.gms:play-services-auth:19.2.0'
// Import the BoM for the Firebase platform
implementation platform('com.google.firebase:firebase-bom:29.0.4')
// Declare the dependency for the Firebase Authentication library
// When using the BoM, you don't specify versions in Firebase library dependencies
implementation 'com.google.firebase:firebase-auth'
// Also declare the dependency for the Google Play services library and specify its version
implementation 'com.google.android.gms:play-services-auth:20.1.0'
implementation 'androidx.core:core-ktx:1.5.0'
implementation 'org.jetbrains.kotlin:kotlin-stdlib:1.5.10'
implementation 'com.google.android.material:material:1.2.1'
}

Answer 1

直接删除新建文件夹appmodule重建项目!
或
尝试使缓存无效并重新启动

这将解决这个问题!