使用Glide加载Drawable资源遭遇NoClassDefFoundError问题求助

从你提供的代码、Gradle配置和报错日志来看，这个错误是因为Glide的Gif相关核心类被混淆或者未正确加载导致的。结合你的Fragment场景，给你几个针对性的解决方案：

1. 修复ProGuard混淆规则 #

你在release构建中开启了minifyEnabled true和shrinkResources true，这大概率会把Glide的Gif解析相关类误删或混淆。请在proguard-rules.pro中添加Glide官方推荐的混淆规则，尤其是Gif相关类的保护：

# Glide基础混淆规则
-keep public class * implements com.bumptech.glide.module.GlideModule
-keep public class * extends com.bumptech.glide.module.AppGlideModule
-keep public enum com.bumptech.glide.load.ImageHeaderParser$** {
  **[] $VALUES;
  public *;
}

# 专门保护Gif解析相关类
-keep class com.bumptech.glide.load.resource.gif.** { *; }

2. 升级Glide到稳定新版本 #

Glide 4.4.0是比较旧的版本，可能存在与Android 26版本SDK或Kotlin的兼容性问题。建议升级到较新的稳定版本，同时注意将过时的compile替换为implementation：

dependencies {
    // 替换原Glide依赖
    implementation 'com.github.bumptech.glide:glide:4.15.1'
    kapt 'com.github.bumptech.glide:compiler:4.15.1'
    // 其他依赖保持不变
}

3. 确保MultiDex配置完全生效 #

虽然你开启了multiDexEnabled true，但如果你的Application没有正确初始化MultiDex，也可能导致类加载失败：

• 如果你的自定义Application继承了MultiDexApplication，那没问题；
• 如果没有，在你的Application类中添加：

override fun attachBaseContext(base: Context?) {
    super.attachBaseContext(base)
    MultiDex.install(this)
}

4. 优化Fragment中Glide的使用方式 #

你当前使用Glide.with(context)，在Fragment中更推荐直接绑定Fragment的生命周期，避免context生命周期不一致的问题：

Glide
    .with(this) // 使用Fragment实例代替context
    .load(R.drawable.a12)
    .into(imageView)

5. 清理项目缓存并重建 #

有时候Android Studio的缓存会导致类加载异常，执行以下操作：

• 点击菜单栏Build -> Clean Project
• 然后点击Build -> Rebuild Project
• 必要时可以手动删除项目根目录下的.gradle和app/build文件夹，再重新同步Gradle

你的问题相关信息： #

Fragment代码：

class F12 : Fragment() {
    override fun onCreateView(inflater: LayoutInflater?, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        val myImageViewLayout : View = inflater!!.inflate(R.layout.f12, container, false)
        val imageView = myImageViewLayout.findViewById<ImageView>(R.id.preview12)
        Glide
            .with(context)
            .load(R.drawable.a12)
            .into(imageView)
        return myImageViewLayout
    }
    override fun onViewCreated(view: View?, savedInstanceState: Bundle?) {
        val shareButton =view!!.findViewById<Button>(R.id.b12)
        val wallButton = view.findViewById<Button>(R.id.wb12)
        val adRequest = AdRequest.Builder().build()
        shareButton.setOnClickListener {
            val shareIntent = Intent()
            shareIntent.action = Intent.ACTION_SEND
            shareIntent.putExtra(Intent.EXTRA_TEXT, "ከመሸ ፍቅራችን ደራ…ወደኋላ አንመልሰዉ ነገር ሆነብን….ቀልዳችን የምር ሲሆን፣ቅዠት ያልነዉ እዉን ሲሆን ሲጨላልም አየነዉ")
            shareIntent.type = "text/plain"
            startActivity(Intent.createChooser(shareIntent, "ሼር ያድርጉ..."))
        }
    }
}

App模块Gradle配置：

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-kapt'
android {
    compileSdkVersion 26
    buildToolsVersion "26.0.3"
    defaultConfig {
        applicationId "com.afc.amhariclovequotes"
        minSdkVersion 14
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    dexOptions {
        javaMaxHeapSize "4g"
    }
}
dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    compile 'com.android.support:appcompat-v7:26.0.0'
    compile 'com.android.support:mediarouter-v7:26.0.0'
    compile 'com.android.support:design:26.0.0'
    compile 'com.google.firebase:firebase-ads:11.6.0'
    compile 'com.google.firebase:firebase-crash:11.6.0'
    compile 'com.google.firebase:firebase-core:11.6.0'
    compile 'com.google.firebase:firebase-messaging:11.6.0'
    compile 'com.android.support:multidex:1.0.1'
    compile 'com.android.support.constraint:constraint-layout:1.0.1'
    compile 'com.github.bumptech.glide:glide:4.4.0@aar'
    kapt 'com.github.bumptech.glide:compiler:4.4.0'
    testCompile 'junit:junit:4.12'
}
repositories {
    mavenCentral()
}
apply plugin: 'com.google.gms.google-services'

报错日志：

FATAL EXCEPTION: main
Process: com.afc_quotes.first_amharic_love_quotes, PID: 24273
java.lang.NoClassDefFoundError: com.bumptech.glide.load.resource.gif.GifBitmapProvider
    at com.bumptech.glide.load.resource.gif.ByteBufferGifDecoder.<init>(ByteBufferGifDecoder.java:68)
    at com.bumptech.glide.load.resource.gif.ByteBufferGifDecoder.<init>(ByteBufferGifDecoder.java:54)
    at com.bumptech.glide.Glide.<init>(Glide.java:327)
    at com.bumptech.glide.GlideBuilder.build(GlideBuilder.java:445)
    at com.bumptech.glide.Glide.initializeGlide(Glide.java:257)
    at com.bumptech.glide.Glide.initializeGlide(Glide.java:212)
    at com.bumptech.glide.Glide.checkAndInitializeGlide(Glide.java:176)
    at com.bumptech.glide.Glide.get(Glide.java:160)
    at com.bumptech.glide.Glide.getRetriever(Glide.java:612)
    at com.bumptech.glide.Glide.with(Glide.java:638)
    **at com.afc.amhariclovequotes.F12.onCreateView(F12.kt:50)**
    at android.support.v4.app.Fragment.performCreateView(Fragment.java:2337)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1419)
    at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1740)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1809)
    at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:799)
    at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2580)
    at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2367)
    at android.support.v4.app.FragmentManagerImpl.removeRedundantOperationsAndExecute(FragmentManager.java:2322)
    at android.support.v4.app.FragmentManagerImpl.execSingleAction(FragmentManager.java:2199)
    at android.support.v4.app.BackStackRecord.commitNowAllowingStateLoss(BackStackRecord.java:651)
    at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:145)
    at android.support.v4.view.ViewPager.populate(ViewPager.java:1236)
    at android.support.v4.view.ViewPager.populate(ViewPager.java:1084)
    at android.support.v4.view.ViewPager$3.run(ViewPager.java:267)
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
    at android.view.Choreographer.doCallbacks(Choreographer.java:670)
    at android.view.Choreographer.doFrame(Choreographer.java:603)
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
    at android.os.Handler.handleCallback(Handler.java:746)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:148)
    at android.app.ActivityThread.main(ActivityThread.java:5443)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)

内容的提问来源于stack exchange，提问作者Haileapp