错误:包 android.support.v7.app 不存在 [英] error: package android.support.v7.app does not exist

问题描述

我打算将 firebase 集成到我的 android 项目中，但是在按照教程进行操作后，我发现出现了此错误错误:包 android.support.v7.app 不存在.我试图清理项目，并检查了 android 中的更新.这是我的 build.gradle [模块]

i'm going to integrate firebase to my android project, but after following the tutorial i found that this error showing up error: package android.support.v7.app does not exist. i tried to clean the project,and i checked update in android . this is my build.gradle [module ]

apply plugin: 'com.android.application'


android {
compileSdkVersion 28

defaultConfig {
    applicationId "com.example.myapplication"
    minSdkVersion 15
    targetSdkVersion 28
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
    }
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:design:28.0.0'
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'
implementation 'com.google.android.gms:play-services-auth:17.0.0'

   }

这是我的 build.gradle [项目]

and this my build.gradle [ project ]

buildscript {
repositories {
    google()
    jcenter()

}
dependencies {
    classpath 'com.android.tools.build:gradle:3.4.1'
}
}

allprojects {
repositories {
    google()
    jcenter()

}
}

task clean(type: Delete) {
delete rootProject.buildDir
}

请帮助解决这个问题我花了一整天寻找解决方案.谢谢

please help to solve this problem i spent all this day looking for a solution . thank you

推荐答案

适用于最新版本(3.4或更高)的Android Studio

For latest version (3.4 or higher) of Android Studio

代替

import android.support.v7.app.AppcompatActivity

使用这个

import androidx.appcompat.app.AppcompatActivity

在 MainActivity.java 或主 java 文件中

In MainActivity.java or in main java file

这篇关于错误:包 android.support.v7.app 不存在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！