java - 移动项目文件夹后应用程序崩溃 android studio

Question

三周前，我决定将项目从 Mac 上的下载文件夹移至桌面。移动项目后，我意识到我什至看不到项目中的任何内容。因此，我决定将项目移回到原来所在的下载文件夹中，并且我能够再次检查我的项目，但不幸的是我无法在手机上运行该项目，并且我收到一条奇怪的错误消息我无法在互联网上找到解决方案。我将向您展示错误消息以及该 Activity 的一些 XML 代码。

XML 代码:

<androidx.constraintlayout.widget.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:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingTop="?attr/actionBarSize">

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/nav_view"
        android:layout_width="427dp"
        android:layout_height="82dp"
        android:background="?android:attr/windowBackground"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:menu="@menu/bottom_nav_menu" />

    <fragment
        android:id="@+id/nav_host_fragment"
        android:name="androidx.navigation.fragment.NavHostFragment"
        android:layout_width="413dp"
        android:layout_height="49dp"
        app:defaultNavHost="true"
        app:layout_constraintBottom_toTopOf="@id/nav_view"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="1.0"
        app:navGraph="@navigation/mobile_navigation" />

    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/home_view_message"
        android:textSize="12sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toTopOf="@+id/nav_host_fragment"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.027" />

    <Spinner
        android:id="@+id/channel_spinner"
        android:layout_width="409dp"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toTopOf="@+id/nav_view"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView6"
        app:layout_constraintVertical_bias="0.162" />

    <Button
        android:id="@+id/check_button"
        android:layout_width="157dp"
        android:layout_height="58dp"
        android:text="@string/home_button_text"
        app:layout_constraintBottom_toTopOf="@+id/nav_view"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/channel_spinner"
        app:layout_constraintVertical_bias="0.418" />

</androidx.constraintlayout.widget.ConstraintLayout>

错误消息:

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mychannels/com.example.mychannels.MainActivity}: android.view.InflateException: Binary XML file line #10: Binary XML file line #10: Error inflating class com.google.android.material.bottomnavigation.BottomNavigationView
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3092)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3235)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1926)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:6990)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1445)
     Caused by: android.view.InflateException: Binary XML file line #10: Binary XML file line #10: Error inflating class com.google.android.material.bottomnavigation.BottomNavigationView
     Caused by: android.view.InflateException: Binary XML file line #10: Error inflating class com.google.android.material.bottomnavigation.BottomNavigationView
     Caused by: java.lang.reflect.InvocationTargetException

Build.gradle(应用程序级别):

apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    buildToolsVersion "29.0.2"
    defaultConfig {
        applicationId "com.example.mychannels"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'com.google.android.material:material:1.0.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'androidx.vectordrawable:vectordrawable:1.0.1'
    implementation 'androidx.navigation:navigation-fragment:2.0.0'
    implementation 'androidx.navigation:navigation-ui:2.0.0'
    implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0'
    implementation 'androidx.preference:preference:1.1.0-alpha05'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.0'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
}

Answer 1

文件 -> 使缓存无效/重新启动并尝试导入它。文件 -> 新建 -> 导入项目