Question

按照https://developer.android.com/studio/build/multidex.html#mdex-gradle

中提到的说明操作后

我收到错误class Context variable context variable MultiDex和package com.mycompany.mypackage; import android.app.Application; import android.util.Log; import com.facebook.react.ReactApplication; import com.slowpath.hockeyapp.RNHockeyAppModule; import com.slowpath.hockeyapp.RNHockeyAppPackage; import com.microsoft.codepush.react.CodePush; import com.facebook.react.ReactInstanceManager; import com.facebook.react.ReactNativeHost; import com.facebook.react.ReactPackage; import com.facebook.react.shell.MainReactPackage; import com.sbugert.rnadmob.RNAdMobPackage; import com.lugg.ReactNativeConfig.ReactNativeConfigPackage; import com.geektime.reactnativeonesignal.ReactNativeOneSignalPackage; import com.dieam.reactnativepushnotification.ReactNativePushNotificationPackage; import com.reactnative.ivpusic.imagepicker.PickerPackage; import com.github.xinthink.rnmk.ReactMaterialKitPackage; import com.learnium.RNDeviceInfo.RNDeviceInfo; import com.burnweb.rnpermissions.RNPermissionsPackage; import net.zubricky.AndroidKeyboardAdjust.AndroidKeyboardAdjustPackage; // react-native-fbsdk import com.facebook.CallbackManager; import com.facebook.FacebookSdk; import com.facebook.reactnative.androidsdk.FBSDKPackage; import com.facebook.appevents.AppEventsLogger; // react-native-fbads import io.callstack.react.fbads.FBAdsPackage; import java.util.Arrays; import java.util.List; public class MainApplication extends Application implements ReactApplication { @Override protected void attachBaseContext(Context base) { super.attachBaseContext(context); MultiDex.install(this); } // react-native-fbsdk private static CallbackManager mCallbackManager = CallbackManager.Factory.create(); protected static CallbackManager getCallbackManager() { return mCallbackManager; } @Override public void onCreate() { super.onCreate(); FacebookSdk.sdkInitialize(getApplicationContext()); // If you want to use AppEventsLogger to log events. AppEventsLogger.activateApp(this); } private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) { @Override protected String getJSBundleFile() { return CodePush.getJSBundleFile(); } @Override protected boolean getUseDeveloperSupport() { return BuildConfig.DEBUG; } @Override protected List<ReactPackage> getPackages() { return Arrays.<ReactPackage>asList( new MainReactPackage(), new RNHockeyAppPackage(MainApplication.this), new CodePush("mykey", MainApplication.this, BuildConfig.DEBUG), new ReactNativeConfigPackage(), new ReactNativeOneSignalPackage(), new ReactNativePushNotificationPackage(), new RNAdMobPackage(), new PickerPackage(), new ReactMaterialKitPackage(), new RNDeviceInfo(), new RNPermissionsPackage(), new AndroidKeyboardAdjustPackage(), new FBSDKPackage(mCallbackManager), new FBAdsPackage() ); } }; @Override public ReactNativeHost getReactNativeHost() { return mReactNativeHost; } }。

dependencies {
    compile project(':react-native-device-info')
    compile project(':react-native-hockeyapp')
    compile project(':react-native-code-push')
    compile project(':react-native-image-crop-picker')
    compile project(':react-native-vector-icons')
    compile project(':react-native-material-kit')
    compile project(':react-native-config')
    compile project(':RNAdMob')
    compile project(':react-native-onesignal')
    compile project(':react-native-push-notification')
    compile project(':RNPermissionsModule')
    compile project(':react-native-android-keyboard-adjust')
    compile project(':react-native-fbsdk')
    compile(project(':react-native-fbads')) {
      exclude group: "com.google.android.gms"
    }
    compile 'com.google.firebase:firebase-core:10.2.0'
    compile 'com.google.firebase:firebase-crash:10.2.0'
    compile 'com.google.firebase:firebase-ads:10.2.0'

    compile fileTree(dir: "libs", include: ["*.jar"])
    compile "com.android.support:appcompat-v7:23.0.1"
    compile "com.facebook.react:react-native:+"  // From node_modules
    compile "com.facebook.fresco:animated-gif:0.12.0"
    compile 'com.android.support:multidex:1.0.1'
}

的build.gradle

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我是否需要添加或导入才能使其正常工作？

Answer 1

感谢@Gabe Sechan的帮助。我知道React Native / JavaScript，对Android / Java很无能为力，所以我只是按照https://developer.android.com/studio/build/multidex.html#mdex-gradle的说明进行操作，但没有提及任何额外的导入。我学会了查看我需要的包裹：https://developer.android.com/reference/android/support/multidex/MultiDexApplication.html。添加后：

import android.support.multidex.MultiDexApplication;

public class MainApplication extends MultiDexApplication implements ReactApplication {
...

应用似乎在Android 4.4.4+设备上构建并成功运行。然而，在运行4.3的三星Galaxy S3模拟器上，我在应用程序启动时遇到了崩溃：What does WIN DEATH: android.osDeadObjectException mean?，这似乎是另一个问题。

Answer 2

如果您使用的是RN> 0.60和androidx支持，则可以添加，

import androidx.multidex.MultiDex;

Answer 3

出现此“未找到符号”问题的原因是因为您没有导入所需的导入。为什么不简单地添加以下导入

import android.support.multidex.MultiDex;

import android.content.Context;

您应该知道使用每个Multidex选项的不同情况。请参阅https://developer.android.com/studio/build/multidex#java，以获取与MultiDexing相关的所有信息

Answer 4

对于那些得到找不到符号错误的人，在android官方开发者文档中说明如下：

<块引用>

If your minSdkVersion is 21 or higher multidex is enabled by default, and you do not need the multidex support library.

Answer 5

将 dependencies: { implementation 'com.android.support:multidex:1.0.3' } 添加到 android/app/build.gradle 解决了我的问题。当我将 minSDKversion 提高到 21 时发生了这种情况。

试图添加MultiDex支持 - 无法找到符号上下文和MultiDex

5 个答案: