title: React Native Android app crashes after installing react-native-firebase
body: <p>I have a react-native project in which I installed <code>react-native-firebase</code> and followed the instructions in the documentation, but when I tried to run the app I got a mismatch version in Gradle so I updated Gradle to 4.6, now the build is successful, but the app keeps quitting</p>
  
  <p>Here is my build.gradle:</p>
  
  <pre><code>// Top-level build file where you can add configuration options common to all sub-projects/modules.
  
  buildscript {
      ext {
          buildToolsVersion = "28.0.2"
          minSdkVersion = 18
          compileSdkVersion = 27
          targetSdkVersion = 26
          supportLibVersion = "27.1.1"
      }
      repositories {
          google()
          jcenter()
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:3.2.0'
          classpath 'com.google.gms:google-services:4.0.1'
          // NOTE: Do not place your application dependencies here; they belong
          // in the individual module build.gradle files
      }
  }
  
  allprojects {
      repositories {
          mavenLocal()
          google()
          jcenter()
          maven {
              // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
              url "$rootDir/../node_modules/react-native/android"
          }
      }
  }
  
  
  task wrapper(type: Wrapper) {
      gradleVersion = '4.6'
      distributionUrl = distributionUrl.replace("bin", "all")
  }
  </code></pre>
  
  <p>and my app/build.gradle</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 rootProject.ext.compileSdkVersion
      buildToolsVersion rootProject.ext.buildToolsVersion
  
      defaultConfig {
          applicationId "com.dental_page_android"
          minSdkVersion rootProject.ext.minSdkVersion
          targetSdkVersion rootProject.ext.targetSdkVersion
          versionCode 1
          versionName "1.0"
          ndk {
              abiFilters "armeabi-v7a", "x86"
          }
      }
      splits {
          abi {
              reset()
              enable enableSeparateBuildPerCPUArchitecture
              universalApk false  // If true, also generate a universal APK
              include "armeabi-v7a", "x86"
          }
      }
      buildTypes {
          release {
              minifyEnabled enableProguardInReleaseBuilds
              proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
          }
      }
      // 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 {
      implementation project(':react-native-firebase')
      implementation "com.google.android.gms:play-services-base:16.0.1"
      implementation "com.google.firebase:firebase-core:16.0.6"
      compile project(':react-native-google-places')
      compile project(':react-native-text-gradient')
      compile project(':react-native-splash-screen')
      compile project(':react-native-linear-gradient')
      compile project(':react-native-gesture-handler')
      implementation fileTree(dir: "libs", include: ["*.jar"])
      implementation "com.android.support:appcompat-v7:${rootProject.ext.supportLibVersion}"
      implementation "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'
  }
  
  apply plugin: 'com.google.gms.google-services'
  </code></pre>
  
  <p>Here is the documentation I followed</p>
  
  <p><a href="https://rnfirebase.io/docs/v5.x.x/installation/android" rel="nofollow noreferrer">React Native Firebase</a></p>
  
  <p>The only step I've made was updating Gradle from 4.4 to 4.6 because of the <code>android.tools.build:gradle:3.2.0</code> required it.</p>