Question

i want to run the script behind the button of Google search that means…posting a form to google server and getting the response in the form of html string and finally i put that string on webview to display result….
then i run the code …
some times it shows correct result (like someone click on google search button) but some times it shows me message to “force to close” without any changes i do in to code….that means prediction about output is unexpected…
My code is like this……

public class url extends Activity
 {
    HttpResponse end = null;
    String endResult = null;
    WebView mWebView;
    Intent myWebViewIntent;
     public static  final int TIMEOUT_MS=10000;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        HttpClient client = new DefaultHttpClient();

        HttpConnectionParams.setConnectionTimeout(client.getParams(), TIMEOUT_MS);
        HttpConnectionParams.setSoTimeout(client.getParams(), TIMEOUT_MS);
        HttpPost post = new HttpPost("http://www.google.com/m");
        List<NameValuePair> pairs = new ArrayList<NameValuePair>();
        pairs.add(new BasicNameValuePair("hl", "en"));
        pairs.add(new BasicNameValuePair("gl", "us"));
        pairs.add(new BasicNameValuePair("source", "android-launcher-widget"));
        pairs.add(new BasicNameValuePair("q", "persistent"));

        try {
            post.setEntity(new UrlEncodedFormEntity(pairs));
        /*  Uri uri = Uri.parse(post.toString());
            TextView t1=new TextView(this);
            t1.setText(post.getRequestLine().getUri());
            this.setContentView(t1);*/

        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        try {
            Toast msg = Toast.makeText(url.this, "Message", Toast.LENGTH_LONG);

            msg.setGravity(Gravity.CENTER, msg.getXOffset() / 2, msg.getYOffset() / 2);

            msg.show();

            HttpResponse response = client.execute(post);

            end = response;


        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            //Toast.makeText(url.this, "problem in execute....", 20).show();
            // TODO Auto-generated catch block
            //put the balance is empty dialog box here.
            e.printStackTrace();
        }
        BasicResponseHandler myHandler = new BasicResponseHandler();
        try {

        //  Log.i("file tag","we are out of url");
            endResult = myHandler.handleResponse(end);

        } catch (HttpResponseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();

        }

    WebView engine = (WebView)findViewById(R.id.webview);
    engine.loadDataWithBaseURL(post.getRequestLine().getUri(), endResult, "text/html", "UTF-8", null);
        //engine.loadData(endResult, "text/html", "UTF-8");
        engine.requestFocus(View.FOCUS_DOWN);


         //engine.loadUrl(endResult);

    }
}

so is there any problem in emulator or installation of SDk or program itself….? becoz it seems to be the connection with the internet is done but i use the proper permission..
thank you..

Answer 1

The ANR you get is because you’re making a blocking call on the UI thread. To perform a blocking action without blocking the UI thread you have to use a thread and a handler, or (recommended) an AsyncTask.

See Painless Threading.