android web browser does not open url

Question

i want to open url through browser but when i click on button it does not open the url please tell me where i made mistake. here is the code of java file.

 public class MainActivity extends AppCompatActivity {

    Button button;
    EditText editText;
    WebView webView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = (Button)findViewById(R.id.but);
        editText = (EditText)findViewById(R.id.edittext);
        webView = (WebView)findViewById(R.id.webView);



    }


    public void Goo(View view){
        String url = editText.getText().toString();
        webView.getSettings().setLoadsImagesAutomatically(true);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.loadUrl(url);
    }
}

here is xml file

    <?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:orientation="vertical"
    >


    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Enter url"
        android:id="@+id/textView"
        />
    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/edittext"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="Goo"
        android:text="Go"
        android:id="@+id/but"
        />

    <WebView
        android:layout_width="fill_parent"
        android:layout_height="match_parent"
        android:id="@+id/webView" />


</LinearLayout>

when i click on button it does not open the page and in the logcat it show message like this

Answer 1

In activity just copy paste the following code...

public class MainActivity extends AppCompatActivity {

    Button button1, button2;
    EditText editText;
    WebView webView;
    String url;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button1 = (Button)findViewById(R.id.but);
        button2 = (Button)findViewById(R.id.but1);
        editText = (EditText)findViewById(R.id.edittext);
        webView = (WebView)findViewById(R.id.webView);
        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                url=editText.getText().toString();
                url="http://"+url;
                loadUrl(url);
            }
        });
       button2.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View view) {
               url="http://www.stackoverflow.com";
               loadUrl(url);
           }
       });

    }

    public void loadUrl(String url) {
        webView.getSettings().setJavaScriptEnabled(true);
        webView.getSettings().setBuiltInZoomControls(true);
        webView.getSettings().setUseWideViewPort(true);
        webView.getSettings().setLoadWithOverviewMode(true);
        webView.getSettings().setDomStorageEnabled(true);
        webView.setVisibility(View.VISIBLE);
            webView.loadUrl(url);
            webView.setWebViewClient(new WebViewClient() {
                @Override
                public boolean shouldOverrideUrlLoading(WebView view, String url) {
                    view.loadUrl(url);
                    return true;
                }
            });
        }
}

and in manifest file.. add these two lines..

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />

In xml, I added,

 <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Go"
            android:id="@+id/but"
            />
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="fb"
        android:id="@+id/but1"
        />

Answer 2

Try this. In your onCreate :

button.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        // call your Goo method here 
    }
});