adding support for android in-app browser

Author: gaurav-android

android/src/main/java/com/reactnativewebbrowser/CustomTabsActivitiesHelper.kt

@@ -1,6 +1,7 @@
 package com.reactnativewebbrowser
 
 import android.content.Intent
+import android.net.Uri
 import java.util.ArrayList
 
 
@@ -13,7 +14,7 @@ interface CustomTabsActivitiesHelper {
 
   val defaultCustomTabsResolvingActivity: String?
 
-  fun startCustomTabs(intent: Intent)
+  fun startCustomTabs(intent: Intent, url: Uri?)
 
   fun canResolveIntent(intent: Intent): Boolean
 }

android/src/main/java/com/reactnativewebbrowser/InternalCustomTabsActivitiesHelper.kt

@@ -16,6 +16,8 @@ import java.util.LinkedHashSet
 import androidx.browser.customtabs.CustomTabsService.ACTION_CUSTOM_TABS_CONNECTION
 import com.reactnativewebbrowser.error.CurrentActivityNotFoundException
 import com.reactnativewebbrowser.error.PackageManagerNotFoundException
+import com.reactnativewebbrowser.utilities.getCustomTabsBrowsers
+import com.reactnativewebbrowser.utilities.getDefaultBrowser
 
 class InternalCustomTabsActivitiesHelper(val activityProvider: ActivityProvider) :
   CustomTabsActivitiesHelper {
@@ -54,8 +56,26 @@ class InternalCustomTabsActivitiesHelper(val activityProvider: ActivityProvider)
     return getResolvingActivities(intent).isNotEmpty()
   }
 
-  override fun startCustomTabs(intent: Intent) {
-    currentActivity.startActivity(intent)
+  override fun startCustomTabs(intent: Intent, url: Uri?) {
+    val defaultBrowser = currentActivity.getDefaultBrowser()
+    val customTabsBrowsers = currentActivity.getCustomTabsBrowsers()
+
+    if (customTabsBrowsers.contains(defaultBrowser)) {
+      val customTabs = CustomTabsIntent.Builder().build()
+      customTabs.intent.setPackage(defaultBrowser)
+      if (url != null) {
+        customTabs.launchUrl(currentActivity, url)
+      }
+    } else if (customTabsBrowsers.isNotEmpty()) {
+      val customTabs = CustomTabsIntent.Builder().build()
+      customTabs.intent.setPackage(customTabsBrowsers[0])
+      if (url != null) {
+        customTabs.launchUrl(currentActivity, url)
+      }
+    } else {
+      // Open in browser externally
+      currentActivity.startActivity(Intent(Intent.ACTION_VIEW, url))
+    }
   }
 
   private fun getResolvingActivities(intent: Intent): List<ResolveInfo> {

android/src/main/java/com/reactnativewebbrowser/NativeWebBrowserModule.kt

@@ -166,7 +166,7 @@ class NativeWebBrowserModule(reactContext: ReactApplicationContext) :
     intent.data = Uri.parse(url)
     try {
       if (customTabsActivitiesHelper.canResolveIntent(intent)) {
-        customTabsActivitiesHelper.startCustomTabs(intent)
+        customTabsActivitiesHelper.startCustomTabs(intent, Uri.parse(url))
         val result = Arguments.createMap()
         result.putString("type", "opened")
         promise.resolve(result)

android/src/main/java/com/reactnativewebbrowser/utilities/KotlinUtilities.kt

@@ -1,5 +1,10 @@
 package com.reactnativewebbrowser.utilities
 
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.net.Uri
+import androidx.browser.customtabs.CustomTabsService
 import com.facebook.react.bridge.Arguments
 import com.facebook.react.bridge.WritableMap
 
@@ -21,3 +26,34 @@ fun WritableMap.putStringArrayList(name: String, strArr: ArrayList<String>) {
   }
   this.putArray(name, arr)
 }
+
+val ALLOWED_CUSTOM_TABS_PACKAGES =
+  arrayOf(
+    "com.android.chrome", // Chrome stable
+    "com.google.android.apps.chrome", // Chrome system
+    "com.chrome.beta",// Chrome beta
+    "com.chrome.dev" // Chrome dev
+  )
+
+fun Context.getDefaultBrowser(): String? {
+  val intent = Intent(Intent.ACTION_VIEW, Uri.parse("https://web3auth.io"))
+  val resolveInfo = packageManager.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY)
+    ?: return null
+  val activityInfo = resolveInfo.activityInfo ?: return null
+  return activityInfo.packageName
+}
+
+fun Context.getCustomTabsBrowsers(): List<String> {
+  val customTabsBrowsers: MutableList<String> = java.util.ArrayList()
+  for (browser in ALLOWED_CUSTOM_TABS_PACKAGES) {
+    val customTabsIntent = Intent()
+    customTabsIntent.action = CustomTabsService.ACTION_CUSTOM_TABS_CONNECTION
+    customTabsIntent.setPackage(browser)
+
+    // Check if this package also resolves the Custom Tabs service.
+    if (packageManager.resolveService(customTabsIntent, 0) != null) {
+      customTabsBrowsers.add(browser)
+    }
+  }
+  return customTabsBrowsers
+}