title: How do I prepare my app for the 64 bit version for React Native?
body: <p>Here is my <strong>build.gradle:</strong></p>
  
  <pre><code>    apply plugin: "com.android.application"
  
  import com.android.build.OutputFile
  
  /**
   * The react.gradle file registers a task for each build variant (e.g. bundleDebugJsAndAssets
   * and bundleReleaseJsAndAssets).
   * These basically call `react-native bundle` with the correct arguments during the Android build
   * cycle. By default, bundleDebugJsAndAssets is skipped, as in debug/dev mode we prefer to load the
   * bundle directly from the development server. Below you can see all the possible configurations
   * and their defaults. If you decide to add a configuration block, make sure to add it before the
   * `apply from: "../../node_modules/react-native/react.gradle"` line.
   *
   * project.ext.react = [
   *   // the name of the generated asset file containing your JS bundle
   *   bundleAssetName: "index.android.bundle",
   *
   *   // the entry file for bundle generation
   *   entryFile: "index.android.js",
   *
   *   // whether to bundle JS and assets in debug mode
   *   bundleInDebug: false,
   *
   *   // whether to bundle JS and assets in release mode
   *   bundleInRelease: true,
   *
   *   // whether to bundle JS and assets in another build variant (if configured).
   *   // See http://tools.android.com/tech-docs/new-build-system/user-guide#TOC-Build-Variants
   *   // The configuration property can be in the following formats
   *   //         'bundleIn${productFlavor}${buildType}'
   *   //         'bundleIn${buildType}'
   *   // bundleInFreeDebug: true,
   *   // bundleInPaidRelease: true,
   *   // bundleInBeta: true,
   *
   *   // whether to disable dev mode in custom build variants (by default only disabled in release)
   *   // for example: to disable dev mode in the staging build type (if configured)
   *   devDisabledInStaging: true,
   *   // The configuration property can be in the following formats
   *   //         'devDisabledIn${productFlavor}${buildType}'
   *   //         'devDisabledIn${buildType}'
   *
   *   // the root of your project, i.e. where "package.json" lives
   *   root: "../../",
   *
   *   // where to put the JS bundle asset in debug mode
   *   jsBundleDirDebug: "$buildDir/intermediates/assets/debug",
   *
   *   // where to put the JS bundle asset in release mode
   *   jsBundleDirRelease: "$buildDir/intermediates/assets/release",
   *
   *   // where to put drawable resources / React Native assets, e.g. the ones you use via
   *   // require('./image.png')), in debug mode
   *   resourcesDirDebug: "$buildDir/intermediates/res/merged/debug",
   *
   *   // where to put drawable resources / React Native assets, e.g. the ones you use via
   *   // require('./image.png')), in release mode
   *   resourcesDirRelease: "$buildDir/intermediates/res/merged/release",
   *
   *   // by default the gradle tasks are skipped if none of the JS files or assets change; this means
   *   // that we don't look at files in android/ or ios/ to determine whether the tasks are up to
   *   // date; if you have any other folders that you want to ignore for performance reasons (gradle
   *   // indexes the entire tree), add them here. Alternatively, if you have JS files in android/
   *   // for example, you might want to remove it from here.
   *   inputExcludes: ["android/**", "ios/**"],
   *
   *   // override which node gets called and with what additional arguments
   *   nodeExecutableAndArgs: ["node"],
   *
   *   // supply additional arguments to the packager
   *   extraPackagerArgs: []
   * ]
   */
  
  project.ext.react = [
      entryFile: "index.js"
  ]
  
  apply from: "../../node_modules/react-native/react.gradle"
  
  /**
   * Set this to true to create two separate APKs instead of one:
   *   - An APK that only works on ARM devices
   *   - An APK that only works on x86 devices
   * The advantage is the size of the APK is reduced by about 4MB.
   * Upload all the APKs to the Play Store and people will download
   * the correct one based on the CPU architecture of their device.
   */
  def enableSeparateBuildPerCPUArchitecture = false
  
  /**
   * Run Proguard to shrink the Java bytecode in release builds.
   */
  def enableProguardInReleaseBuilds = false
  
  android {
      compileSdkVersion 28
      buildToolsVersion "27.0.3"
  
      configurations {
          all*.exclude group: 'com.android.support', module: 'support-v4'
          all*.exclude group: 'com.android.support', module: 'support-annotations'
          compile.exclude group: "org.apache.httpcomponents", module: "httpclient"
      }
  
      signingConfigs {
          release {
              if (project.hasProperty('MYAPP_RELEASE_STORE_FILE')) {
                  storeFile file(MYAPP_RELEASE_STORE_FILE)
                  storePassword MYAPP_RELEASE_STORE_PASSWORD
                  keyAlias MYAPP_RELEASE_KEY_ALIAS
                  keyPassword MYAPP_RELEASE_KEY_PASSWORD
              }
          }
      }
  
  
      defaultConfig {
          applicationId "com.example"
          minSdkVersion 16
          targetSdkVersion 28
          versionCode 1075
          versionName "1.0.75"
          multiDexEnabled true
  
          ndk {
              abiFilters 'armeabi-v7a' , 'x86'
          }
  
  
      dexOptions {
      javaMaxHeapSize "4g"
      preDexLibraries = false
      incremental true
  }
  
  compileOptions {
          sourceCompatibility JavaVersion.VERSION_1_8
          targetCompatibility JavaVersion.VERSION_1_8
      }
  
      }
      splits {
          abi {
              reset()
              enable enableSeparateBuildPerCPUArchitecture
              universalApk false  // If true, also generate a universal APK
              include "armeabi-v7a", "x86"
          }
      }
  
  
  
  
      buildTypes {
          release {
              minifyEnabled enableProguardInReleaseBuilds
              matchingFallbacks = ['release', 'debug']
              proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
              signingConfig signingConfigs.release
          }
      }
  
      // applicationVariants are e.g. debug, release
      applicationVariants.all { variant -&gt;
          variant.outputs.each { output -&gt;
              // For each separate APK per architecture, set a unique version code as described here:
              // http://tools.android.com/tech-docs/new-build-system/user-guide/apk-splits
              def versionCodes = ["armeabi-v7a":1, "x86":2]
              def abi = output.getFilter(OutputFile.ABI)
              if (abi != null) {  // null for the universal-debug, universal-release variants
                  output.versionCodeOverride =
                          versionCodes.get(abi) * 1048576 + defaultConfig.versionCode
              }
          }
      }
  }
  
  
  dependencies {
  
      compile project(':RNWebView')
      compile project(':react-native-share')
      implementation project(':lottie-react-native')
  
      implementation project(':react-native-smart-splashscreen')
  
  
      implementation fileTree(dir: 'libs', include: ['*.jar'])
      implementation "com.facebook.fresco:fresco:1.0.1"
      implementation "com.facebook.fresco:animated-gif:1.0.1"
      compile "com.facebook.react:react-native:+" // From node_modules
  
  }
  
  
  
  // Run this once to be able to run the application with BUCK
  // puts all compile dependencies into folder libs for BUCK to use
  task copyDownloadableDepsToLibs(type: Copy) {
      from configurations.compile
      into 'libs'
  }
  </code></pre>
  
  <p>I tried to add 64 bit yesterday and ran into a heap of problems so I converted everything back to 32. The app works perfectly in 32 bit but is there a way I can use both 32 and 64 bit without the app crashing once I open it?</p>
  
  <p>I looked up some solutions but most of them was very confusing to follow. I updated <code>ndk</code> with the <code>"x86", "x86_64", "armeabi-v7a", "arm64-v8a"</code>. Not sure if I also update the <code>abi</code> as well. Any help on this problem is gladly appreciated!</p>