If you want to show web pages without opening browser application in your android application then make the use of webview as I have done below:-

1) to make your application access the internet use the permission"<uses-permission android:name="android.permission.INTERNET"/>" in your manifest file.

2) Use the <webview> tag in your xml file where you want to show the web page.

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">

    <Button
        android:id="@+id/btn"
        android:text="Click"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <WebView
        android:id="@+id/webview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:visibility="gone"
        />

</RelativeLayout>

3) Now initialize the webview in your java file as shown below

MainActivity.java

public class MainActivity extends AppCompatActivity {
    private WebView mweView;
    private Button btn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn=(Button)findViewById(R.id.btn);
        btn.setOnClickListener(mClickListener);

    }

    View.OnClickListener mClickListener=new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            webview();
        }
    };

    private void webview()
    {
        mweView=(WebView)findViewById(R.id.webview);
        
        btn.setVisibility(View.GONE);
        mweView.setVisibility(View.VISIBLE);

//will open all hyperlinks on your web page within your app
        mweView.setWebViewClient(new WebViewClient());

// shows the particular url in your app
        mweView.loadUrl("http://www.evontech.com/");


    }
}