android - Handle tel link in WebView

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/base_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="#fbfffc"
    >
    <WebView
        android:id="@+id/web_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        />
</LinearLayout>

MainActivity.java

package com.cfsuman.me.androidcodesnippets;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebResourceRequest;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
    private Context mContext;
    private Activity mActivity;

    private WebView mWebView;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Get the application context
        mContext = getApplicationContext();
        mActivity = MainActivity.this;

        // Get the widget reference from xml layout
        mWebView = findViewById(R.id.web_view);

        // Toast the current api level
        Toast.makeText(mContext,"API LEVEL: "+Build.VERSION.SDK_INT,Toast.LENGTH_SHORT).show();

        // Set the web view client
        mWebView.setWebViewClient(new WebViewClient(){

            // For api level bellow 24
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url){
                Toast.makeText(mContext, "Old Method",Toast.LENGTH_SHORT).show();

                if(url.startsWith("http")){
                    Toast.makeText(mContext,"Page link",Toast.LENGTH_SHORT).show();
                    // Return false means, web view will handle the link
                    return false;
                }else if(url.startsWith("tel:")){
                    // Handle the tel: link
                    handleTelLink(url);

                    // Return true means, leave the current web view and handle the url itself
                    return true;
                }

                return false;
            }


            // From api level 24
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request){
                Toast.makeText(mContext, "New Method",Toast.LENGTH_SHORT).show();

                // Get the tel: url
                String url = request.getUrl().toString();

                if(url.startsWith("http")){
                    Toast.makeText(mContext,"Page link",Toast.LENGTH_SHORT).show();
                    // Return false means, web view will handle the link
                    return false;
                }else if(url.startsWith("tel:")){
                    // Handle the tel: link
                    handleTelLink(url);

                    // Return true means, leave the current web view and handle the url itself
                    return true;
                }

                return false;
            }
        });

        // Load the url into web view
        //mWebView.loadUrl("https://paulund.co.uk/add-telephone-number-links-with-html5");
        mWebView.loadUrl("https://developers.google.com/web/fundamentals/native-hardware/click-to-call/");
    }


    // Custom method to handle html tel: link
    protected void handleTelLink(String url){
        // Initialize an intent to open dialer app with specified phone number
        // It open the dialer app and allow user to call the number manually
        Intent intent = new Intent(Intent.ACTION_DIAL);

        // Send phone number to intent as data
        intent.setData(Uri.parse(url));

        // Start the dialer app activity with number
        startActivity(intent);
    }
}