1. 在android/gradle/wrapper/gradle-wrapper.properties中，更改以distributionUrl开头的行，如下所示:distributionUrl = https://services.gradle.org/distributions/gradle-4.10.2-all.zip

2.在android/build.gradle中，替换:

2.In android/build.gradle, replace:

dependencies {
    classpath 'com.android.tools.build:gradle:3.2.1'
}

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dependencies {
  classpath 'com.android.tools.build:gradle:3.3.0'
}

3.在android/gradle.properties中，添加

3.In android/gradle.properties, append

android.enableJetifier=true
android.useAndroidX=true

4.在android/app/build.gradle中:

4.In android/app/build.gradle:

在android {下，请确保compileSdkVersion和targetSdkVersion至少为28.

Under android {, make sure compileSdkVersion and targetSdkVersion are at least 28.

5.用AndroidX等效项替换所有不推荐使用的库.例如，如果您使用默认的.gradle文件，请进行以下更改:

5.Replace all deprecated libraries with the AndroidX equivalents. For instance, if you’re using the default .gradle files make the following changes:

在android/app/build.gradle中

In android/app/build.gradle

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

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testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"

最后，在依赖项下替换

androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'

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androidTestImplementation 'androidx.test:runner:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'