java - 安卓错误 : Your app has more methods references than can fit in a single dex file

Question

Gradle 构建成功，但当我尝试运行我的应用程序时，出现此错误:

Error:Your app has more methods references than can fit in a single dex file. See https://developer.android.com/tools/building/multidex.html

我在我的应用中实现了“使用 Google 帐户登录”功能后得到了这个。

为什么我会收到这个？为了解决这个问题，我不明白这个问题。你们有解决方案吗？

编辑

我按照步骤操作，但是它显示另一个错误:

Copying resources from program jar [/Users/Earthling/AndroidStudioProjects/GoogleTestProject/app/build/intermediates/transforms/jarMerging/debug/jars/1/1f/combined.jar] :app:transformClassesWithDexForDebug FAILED Error:Execution failed for task ':app:transformClassesWithDexForDebug'. com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_31.jdk/Contents/Home/bin/java'' finished with non-zero exit value 3

Answer 1

你必须使用 multidex 因为你的项目超出了一个应用程序中授权的方法的限制(大约 ~56000 或差不多，我不记得了)。请参阅文档中的这句话(您顺便提供的链接):

As the Android platform has continued to grow, so has the size of Android apps. When your application and the libraries it references reach a certain size, you encounter build errors that indicate your app has reached a limit of the Android app build architecture.

为了构建和运行，您有 to configure your build.gradle如下:

android {
    defaultConfig {
        ...
        // enabling multidex
        multiDexEnabled true
    }
}

// add the dependencie
dependencies {
    compile 'com.android.support:multidex:1.0.0'
}

然后，创建您自己的 Application 类，如下所示:

public class MyApplication extends MultiDexApplication {
    @Override
    protected void attachBaseContext(Context base) {
        super.attachBaseContext(base);
        MultiDex.install(this); // install multidex
    }
}

最后，在Manifest中添加这个类:

<application
    ...
    android:name=".MyApplication">

或者您可以默认使用 android.multidex.application 而不是像这样创建:

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