Android: Open a web page in chrome custom tabs and also show a custom native view on top of it

cct_with_custom_view.png

custom_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">

    <TextView
        android:id="@+id/btn_xml"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="center"
        android:padding="8dp"
        android:text="just a button"
        android:textColor="#fff"
        android:background="#31adad"
        />

</LinearLayout>

CustomTabHelper.kt

package com.asutosh.trials

import `in`.novopay.los.ui.offlinekyc.WebViewActivity
import android.app.PendingIntent
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.net.Uri
import android.text.TextUtils
import android.widget.RemoteViews
import androidx.browser.customtabs.CustomTabsIntent
import androidx.browser.customtabs.CustomTabsService


class CustomTabHelper {

    var sPackageNameToUse: String? = null
    val STABLE_PACKAGE = "com.android.chrome"
    val BETA_PACKAGE = "com.chrome.beta"
    val DEV_PACKAGE = "com.chrome.dev"
    val LOCAL_PACKAGE = "com.google.android.apps.chrome"

    /** @context: context of the activity or application context
     *  @url: the url to open in the chrome custom tab
     *  @pendingIntent: the intent that will be fired on clicking on the custom view on the chrome custom tab
     *  @packageName: package name from where the chrome custom tab is loaded
     *  @customXmlLayout: XML layout, where the custom native view to be shown on the chrome custom tab is
     *  @idOfCustomView: id of the custom native view to be shown on the chrome custom tab
     */
    fun loadCustomChromeTab(
        context: Context,
        url: String,
        pendingIntent: PendingIntent,
        packageName: String,
        customXmlLayout: Int,
        idOfCustomView: Int) {

        val builder = CustomTabsIntent.Builder()

        // this view will be placed as a native view on the webpage loaded on chrome custom tab
        val remoteViews = RemoteViews(packageName, customXmlLayout)
        builder.setSecondaryToolbarViews(
            remoteViews,
            intArrayOf(idOfCustomView),
            pendingIntent
        )

        val customTabsIntent = builder.build()
        val packageName = getPackageNameToUse(context, url)

        if (packageName == null) {
            // if chrome not available open in web view
            val intentOpenUri = Intent(context, WebViewActivity::class.java)
            intentOpenUri.putExtra(WebViewActivity.EXTRA_URL, Uri.parse(url).toString())
            context.startActivity(intentOpenUri)
        } else {
            // open in chrome custom tab
            customTabsIntent.intent.setPackage(packageName)
            customTabsIntent.launchUrl(context, Uri.parse(url))
        }
    }

    fun getPackageNameToUse(context: Context, url: String): String? {

        sPackageNameToUse?.let {
            return it
        }

        val pm = context.getPackageManager()

        val activityIntent = Intent(Intent.ACTION_VIEW, Uri.parse(url))
        val defaultViewHandlerInfo = pm.resolveActivity(activityIntent, 0)
        var defaultViewHandlerPackageName: String? = null

        defaultViewHandlerInfo?.let {
            defaultViewHandlerPackageName = it.activityInfo.packageName
        }

        val resolvedActivityList = pm.queryIntentActivities(activityIntent, 0)
        val packagesSupportingCustomTabs = ArrayList<String>()
        for (info in resolvedActivityList) {
            val serviceIntent = Intent()
            serviceIntent.action = CustomTabsService.ACTION_CUSTOM_TABS_CONNECTION
            serviceIntent.setPackage(info.activityInfo.packageName)

            pm.resolveService(serviceIntent, 0)?.let {
                packagesSupportingCustomTabs.add(info.activityInfo.packageName)
            }
        }

        when {
            packagesSupportingCustomTabs.isEmpty() -> sPackageNameToUse = null
            packagesSupportingCustomTabs.size == 1 -> sPackageNameToUse =
                packagesSupportingCustomTabs.get(0)
            !TextUtils.isEmpty(defaultViewHandlerPackageName)
                    && !hasSpecializedHandlerIntents(context, activityIntent)
                    && packagesSupportingCustomTabs.contains(defaultViewHandlerPackageName) ->
                sPackageNameToUse = defaultViewHandlerPackageName
            packagesSupportingCustomTabs.contains(STABLE_PACKAGE) -> sPackageNameToUse =
                STABLE_PACKAGE
            packagesSupportingCustomTabs.contains(BETA_PACKAGE) -> sPackageNameToUse = BETA_PACKAGE
            packagesSupportingCustomTabs.contains(DEV_PACKAGE) -> sPackageNameToUse = DEV_PACKAGE
            packagesSupportingCustomTabs.contains(LOCAL_PACKAGE) -> sPackageNameToUse =
                LOCAL_PACKAGE
        }
        return sPackageNameToUse
    }

    private fun hasSpecializedHandlerIntents(context: Context, intent: Intent): Boolean {
        try {
            val pm = context.getPackageManager()
            val handlers = pm.queryIntentActivities(
                intent,
                PackageManager.GET_RESOLVED_FILTER
            )
            if (handlers == null || handlers.size == 0) {
                return false
            }
            for (resolveInfo in handlers) {
                val filter = resolveInfo.filter ?: continue
                if (filter.countDataAuthorities() == 0 || filter.countDataPaths() == 0) continue
                if (resolveInfo.activityInfo == null) continue
                return true
            }
        } catch (e: RuntimeException) {
        }
        return false
    }
}

UsageDemo.kt

val intent = Intent(applicationContext, FileChooserActivity::class.java)
val pendingIntent = PendingIntent.getActivity(applicationContext, 106, intent, PendingIntent.FLAG_UPDATE_CURRENT)

CustomTabHelper().loadCustomChromeTab(
            this,
            "http://example.com/",
            pendingIntent,
            packageName!!,
            R.layout.custom_layout,
            R.id.btn_xml)