java - 由于 androidx drawerlayout 导致的错误

Question

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.cn/com.example.cn.MainActivity}: android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class android.support.v4.widget.DrawerLayout

<?xml version="1.0" encoding="utf-8"?>  
<androidx.drawerlayout.widget.DrawerLayout  
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:id="@+id/drawable_layout"  
android:layout_width="match_parent"  
android:layout_height="match_parent"  
android:paddingLeft="10dp"  
android:paddingBottom="5dp"  
tools:context="com.example.cn.MainActivity"  
android:paddingStart="10dp"  
tools:ignore="RtlSymmetry">  

应用

'''

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'

android {
compileSdkVersion 28
defaultConfig {
applicationId "com.example.cn"
minSdkVersion 16
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'])  
//noinspection GradleCompatible  
implementation 'androidx.appcompat:appcompat:1.1.0-alpha02'  
implementation 'com.google.android.material:material:1.1.0-alpha04'  
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'  
implementation 'de.hdodenhof:circleimageview:3.0.0'  
implementation 'com.google.firebase:firebase-core:16.0.7'  
implementation 'com.google.firebase:firebase-auth:16.1.0'  
implementation 'com.google.firebase:firebase-messaging:17.4.0'  
apply plugin: 'com.google.gms.google-services'  
implementation 'com.firebaseui:firebase-ui-database:4.3.1'  
implementation 'com.theartofdev.edmodo:android-image-cropper:2.8.0'  
implementation 'com.squareup.picasso:picasso:2.71828'  
implementation 'com.google.firebase:firebase-database:16.1.0'  
implementation 'com.google.firebase:firebase-storage:16.1.0'  
testImplementation 'junit:junit:4.12'  
androidTestImplementation 'androidx.test:runner:1.1.2-alpha01'  
androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.2-   
alpha01'  
implementation 'androidx.recyclerview:recyclerview:1.1.0-alpha02'    
}  

'''

Answer 1

错误很明显。您正在使用 Android Support Libraries在dependencies但在 layout你正在尝试使用 androidx .

例如:

Android 支持库: com.android.support:appcompat-v7

AndroidX: androidx.appcompat:appcompat:1.0.0

所以您有两个选项之一，要么继续使用 Android Support Libraries这意味着您需要重命名 DrawerLayout至 <android.support.v4.widget.DrawerLayout或将项目升级到 AndroidX .

要进行升级，您可以从 Android Studio 继续 Refactor -> Migrate to AndroidX 进行升级.

如果您决定使用这种方式，请遵循 Android Studio 提供的建议 zip您的项目，而不是进行升级。这意味着您始终可以在 AndroidX 之前返回您的项目升级。

Also there is possibility that not all things will work after upgrade and maybe manually adjustment will be needed.

或手动:https://developer.android.com/jetpack/androidx/migrate