build.gradle: Sync app version with package.json version

Author: sashko9807

android/app/build.gradle

@@ -2,7 +2,7 @@ apply plugin: "com.android.application"
 
 import com.android.build.OutputFile
 import org.apache.tools.ant.taskdefs.condition.Os
-import groovy.swing.SwingBuilder
+import groovy.json.JsonSlurper
 
 /**
  * The react.gradle file registers a task for each build variant (e.g. bundleDebugJsAndAssets
@@ -92,6 +92,15 @@ project.ext.react = [
 
 apply from: new File(["node", "--print", "require.resolve('react-native/package.json')"].execute(null, rootDir).text.trim(), "../react.gradle")
 
+def getVersionFromPackageJson() {
+    //  Read and parse package.json file from project root
+    def inputFile = new File("$rootDir/../package.json")
+    def packageJson = new JsonSlurper().parseText(inputFile.text)
+
+    // Return the version, you can get any value this way
+    return packageJson["version"]
+}
+
 /**
  * Set this to true to create two separate APKs instead of one:
  *   - An APK that only works on ARM devices
@@ -147,7 +156,7 @@ android {
         minSdkVersion rootProject.ext.minSdkVersion
         targetSdkVersion rootProject.ext.targetSdkVersion
         versionCode 1
-        versionName "1.0.0"
+        versionName getVersionFromPackageJson()
         buildConfigField "boolean", "IS_NEW_ARCHITECTURE_ENABLED", isNewArchitectureEnabled().toString()
 
         if (isNewArchitectureEnabled()) {