Want to implement back button functionality to a basic Android WebView application

Issue

I created a basic WebView app, want to add a back button function which would take the user to the previous page rather than exiting the app. Have attached the MainActivity.java code with this question below.I am a newbie to stack overflow and android development.

package example.com;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.webkit.WebView;
import android.webkit.WebViewClient;

    public class MainActivity extends AppCompatActivity {

        private WebView webview;

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

        webview =(WebView)findViewById(R.id.webView);

        webview.setWebViewClient(new WebViewClient());
        webview.getSettings().setJavaScriptEnabled(true);
        webview.getSettings().setDomStorageEnabled(true);
        webview.setOverScrollMode(WebView.OVER_SCROLL_NEVER);
        webview.loadUrl("https://www.example.com");

        }
}

Solution

@Override onBackPress() inside your mainActivity and add your navigation logic inside it. Here is working snipped

public class MainActivity extends AppCompatActivity { 

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

        webView = findViewById(R.id.webView);
        webView = new WebView(MainActivity.this);
        webView.loadUrl(...);

    }

    @Override
    public void onBackPressed() {
        if (webView != null && webView.canGoBack()) {
           webView.goBack();
        }else{
           //Your App exit logic here
        }
    }

}

I hope this will meet your requirements.

Answered By - Vipul Prajapati