致命异常:java.lang.NoClassDefFoundError:android.support.v7.appcompat.R $ layout

Question

我刚从日食迁移到工作室.我跟着一个博客将项目从eclipse导出到了工作室.该应用程序在棒棒糖中运行良好,并在棒棒糖前设备中抛出以下错误.

仅在工作室中获取此错误.不是在日蚀.

FATAL EXCEPTION: main
    java.lang.NoClassDefFoundError: android.support.v7.appcompat.R$layout
            at android.support.v7.app.AppCompatDelegateImplV7.ensureSubDecor(AppCompatDelegateImplV7.java:324)
            at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:246)
            at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106)
            at com.hsp.inventory.SplashActivity.onCreate(SplashActivity.java:53)
            at android.app.Activity.performCreate(Activity.java:5122)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1081)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2270)
          //
          ......
          //

我的gradle文件

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        jcenter()
        mavenCentral()
        maven {
            url "http://dl.bintray.com/journeyapps/maven"
        }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.3.0'
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

apply plugin: 'com.android.application'

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.google.android.gms:play-services:7.5.0'
    compile 'com.android.support:design:22.2.0'
    compile 'com.android.support:appcompat-v7:22.2.0'
    compile 'com.android.support:cardview-v7:22.2.0'
    compile 'com.android.support:recyclerview-v7:22.2.0'
    compile 'com.google.code.gson:gson:2.3'
   // compile "com.android.support:support-v4:18.0.+"

    compile project(':sliderLibrary')
    compile project(':camera')
    compile project(':volley')

    // Zxing library compile

    compile 'com.journeyapps:zxing-android-embedded:2.3.0@aar'
    compile 'com.journeyapps:zxing-android-legacy:2.3.0@aar'
    compile 'com.journeyapps:zxing-android-integration:2.3.0@aar'
    compile 'com.google.zxing:core:3.2.0'

}


android {

    compileSdkVersion 22
    buildToolsVersion '22.0.1'

    defaultConfig {
        applicationId "com.hsp.inventory"
        minSdkVersion 14
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }


    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            resources.srcDirs = ['src']
            aidl.srcDirs = ['src']
            renderscript.srcDirs = ['src']
            res.srcDirs = ['res']
            assets.srcDirs = ['assets', 'src/main/assets', 'src/main/assets/fonts']
        }

        instrumentTest.setRoot('tests')


        debug.setRoot('build-types/debug')
        release.setRoot('build-types/release')
    }
}

如果您想查看我的manifest和act_splash.xml,请告诉我.我会在这里更新.

任何的想法？

Answer 1

我遇到了同样的问题并修复了它.这是Dex限制的问题.因为达到了dex限制,所以它会创建两个dex文件.Lollipop知道如何阅读,除非你在Application课堂上指定它,否则前Lollipop不知道.

请确保以下内容:

在build.gradle中

dependencies {
    compile 'com.android.support:multidex:1.0.0'
}
defaultConfig {          
    multiDexEnabled true
}

重要的是支持pre-Lollipop:

在Manifest中,在应用程序标记下,

<application
        ...
        android:name="android.support.multidex.MultiDexApplication">
        ...
</application>

或者,如果您使用了自己的Application类,请以Application覆盖为attachBaseContext开头

 import android.support.multidex.MultiDexApplication;
 import android.support.multidex.MultiDex;

 public class MyApplication extends MultiDexApplication {
 // ......

    @Override
    protected void attachBaseContext(Context base) {
        super.attachBaseContext(base);
        MultiDex.install(this);
    }
}

参考:https://developer.android.com/tools/building/multidex.html#mdex-gradle