android - 多索引 :no class found exception

Question

我的应用程序超过 64k 个方法，所以我应该实现 Multidex ， 最初我有问题，因为“本地路径不存在”我解决了这个问题，现在 gradle 生成了 classes1.dex 和 classes2.dex， 但不能在低于 Lollipop 的情况下工作。它在 Lollipop 中工作正常，因为它具有 native 支持。错误说“<1st activity> is not present in dex path”

在看了一些教程后，他们说必须对 1.gradle 2.application class 3.manifest 进行更改

我对应用程序类了解不多..请指导我谢谢

注意:这是从eclipse导入的项目。

请检查build.gradle文件

apply plugin: 'com.android.application'
android {
defaultConfig {
    compileSdkVersion 23
    buildToolsVersion '23.0.1'
    minSdkVersion 15 //lower than 14 doesn't support multidex
    targetSdkVersion 23


}
dexOptions {
    jumboMode = true

    preDexLibraries = false
    javaMaxHeapSize "2048M"
}
afterEvaluate {
    tasks.matching {
        it.name.startsWith('dex')
    }.each { dx ->
        if (dx.additionalParameters == null) {
            dx.additionalParameters = ['--multi-dex']
        } else {
            dx.additionalParameters += '--multi-dex'
        }
    }
}
sourceSets {
    main {
        manifest.srcFile 'AndroidManifest.xml'
        java.srcDirs = ['src']
        resources.srcDirs = ['src']
        aidl.srcDirs = ['src']
        renderscript.srcDirs = ['src']
        res.srcDirs = ['res']
        assets.srcDirs = ['assets']
    }

    // Move the tests to tests/java, tests/res, etc...
    instrumentTest.setRoot('tests')

    // Move the build types to build-types/<type>
    // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
    // This moves them out of them default location under src/<type>/... which would
    // conflict with src/ being used by the main source set.
    // Adding new build types or product flavors should be accompanied
    // by a similar customization.
    debug.setRoot('build-types/debug')
    release.setRoot('build-types/release')
}
productFlavors {
}
buildTypes {
    release {
        minifyEnabled true
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
compile 'com.android.support:appcompat-v7:23.0.1'
compile 'com.android.support:multidex:1.0.1'
}

Answer 1

您遵循了一个教程，该教程展示了如何在Android gradle 插件支持多 dex 之前手动添加它。从 v0.14.0 开始，您需要做的就是添加:

android {
  defaultConfig {
     ...
     multiDexEnabled true
}

并且您可以选择三个选项之一来调用 MultiDex 代码。来自 MultiDexApplication documentation :

Minimal MultiDex capable application. To use the legacy multidex library there is 3 possibilities:
- Declare this class as the application in your AndroidManifest.xml.
- Have your Application extends this class.
- Have your Application override attachBaseContext starting with

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

不要忘记从构建脚本中删除 afterEvaluate block 。

确保您已阅读 official documentation .