How to open WebView when click on Card View

Question

I trying to open WebView when I click on Card View. The WebView is implemented in Main Activity. It is not working. I am new in coding. This is the Dashboard Activity 👇. Please tell me how can I solve the problem.

public class DashBoardActivity extends MainActivity implements View.OnClickListener {

public CardView card1, card2;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate( savedInstanceState );
    setContentView( activity_dashboard );

    card1 = findViewById( R.id.c1 );
    card2 = findViewById( R.id.c2 );



    card1.setOnClickListener( this );
    card2.setOnClickListener( this );
    
}


@Override
public void onClick(View v) {
    int id = v.getId();
    if (id == R.id.nav_home1) {
        web_view( "example1.com" );
    } else if (id == R.id.nav_home2) {
        web_view( "example2.com");
    }
}

}

Answer 1

You don't need to extend your Main Activity.

Just pass the URL in Intent Extras to your Main Activity and start it there.

@Override
public void onClick(View v) {
    Intent intent = new Intent(this, MainActivity.class);   
    String example1 = "example1.com";
    String example2="example2.com";
    int id = v.getId();
    if (id == R.id.nav_home1) {
        intent.putExtra("URL", example1);
    } else if (id == R.id.nav_home2) {
        intent.putExtra("URL", example2);
    }
startActivity(intent);
}

Then retrieve these extras in your onCreate MainActivity

private WebView wv1;
@Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      String url;
  
    if (savedInstanceState == null) {
    Bundle extras = getIntent().getExtras();

    if(extras == null) {
        url= null;
      } else {
        url= extras.getString("URL");
      }

    } else {

       url= (String) savedInstanceState.getSerializable("URL");
    
    }

    wv1=(WebView)findViewById(R.id.webView);
    wv1.setWebViewClient(new MyBrowser());

    wv1.getSettings().setLoadsImagesAutomatically(true);
    wv1.getSettings().setJavaScriptEnabled(true);
    wv1.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
    wv1.loadUrl(url);

}