How to speed up the populating of listview - Android Discussion Boards

Hi i want to design SearchBox Control programatically to search operation in my apps

So? Whats the problem. Go ahead.

I want (programmatically of course) to open the searchview (make it "in use").

I tried several functions such as:

SearchView searchView = (SearchView) menu.findItem(R.id.menu_search).getActionView();
searchView.setOnQueryTextListener(this);

searchView.performClick();
searchView.requestFocus();

But none of those worked...

The SearchView in the XML:

<item android:id="@+id/menu_search"
android:title="Search"
android:icon="@drawable/ic_action_search"
android:showAsAction="ifRoom|collapseActionView"
android:actionViewClass="android.widget.SearchView" />

Thank's

Hi i want design gridview using java program code for calculation in gridview in a linearlayout so only draw a gridview on my layout to do some mathematical operation

Everyone:

I have a WCF service that returns it's results in JSON format. It works fine when I put the url in a browser. I'm have a small test Anroid application in which the user clicks a button, the service is called and the value returned is displayed. The program always hangs on the HttpResponse ... execute statement. I'm using the Android studio for development and as far as I can tell, no error message returns. I also made sure to include the 'permission.INTERNET' statement in the manifest.
Here's the code:

Java

DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet httpget = new HttpGet("http://XXXXXXXX/jsonwebservice/Service1.svc/getCNSP/CN-000186");

HttpResponse response = httpClient.execute(httpget);
HttpEntity responseEntity = response.getEntity();

Thanks for the help,
Dale

Kindly provide the LogCat in case it is showing any warning or errors.

Make sure you are running HTTP connection in Async Task.

Most probably you are making the network call on the main thread. This isn't allowed (NetworkOnMainThreadException).

Hi,
I am populating my listview from Sqlite (sometime also from DataTable)
1. when the data is huge its very slow ?
2. how to have filter for this with high speed ?(same as contact list )

Thanks in advanced !
For filtering i have seen this code :

_adapter.Filter.InvokeFilter(_inputSearch.Text);

but just work for one column :

_adapter = new ArrayAdapter<string>(this, Resource.Layout.list_item, Resource.Id.product_name, products);

No USE At ALL !!!!

my code :

protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            // Create your application here
            SetContentView(Resource.Layout.HesabList);

            progress = ProgressDialog.Show(this, "", "Loading ...");
            progress.SetProgressStyle(ProgressDialogStyle.Spinner);
            progress.Indeterminate = true;
            new Thread(new ThreadStart(delegate
            {
                _btnUpdate = FindViewById<Button>(Resource.Id.UpdateHesabList);
                _btnUpdate.Click += new EventHandler(_btnUpdate_Click);
                gvHesab = FindViewById<ListView>(Resource.Id.gvHesabList);
                gvHesab.ItemClick += new EventHandler<AdapterView.ItemClickEventArgs>(gvHesab_ItemClick);
                isTarafHesab = Intent.GetBooleanExtra("IsTarafHesab", false);
                txtSearchHesabList = (EditText)FindViewById(Resource.Id.txtSearchHesabList);
                txtSearchHesabList.TextChanged += new EventHandler<Android.Text.TextChangedEventArgs>(txtSearchHesabList_TextChanged);
                txtSearchHesabList.Gravity = GravityFlags.Right;

                Looper.Prepare();
                File dbtest = new File(clsBase.SqliteDBPath);
                
                if (!dbtest.Exists() )
                {

                    if (clsBase.HasInternetConnection(this))
                        createDbSqlite();
                    else
                    {
                        MessageBoxAndroid.Show(this, "Connect to Internet First !");
                        Finish();
                    }
                }
                else
                {
                     fillListView();
                 }

                RunOnUiThread(() => progress.Dismiss()); 
           })).Start();
            
        }

private void fillGridView()
        {
            try
            {  
                SQLiteDatabase db = OpenOrCreateDatabase("test.db", FileCreationMode.WorldReadable, null);

                ICursor cursors = db.RawQuery("select Moen, Hesab, opab, Coab,(select count(*) from tbl_Hest b  where a._id >= b._id) as _id,Id  from tbl_Hest a", null);
                
                String[] from = Resources.GetStringArray(Resource.Array.gvHesabHeader);

                int[] to = { Resource.Id.txt_HesabListGrid_Heen,
                             Resource.Id.txt_HesabListGrid_Heol ,Resource.Id.txt_HesabListGrid_Heb,
                             Resource.Id.txt_HesabListGrid_Coab,Resource.Id.txt_HesabListGrid_Row,Resource.Id.txt_HesabListGrid_Id};
                RunOnUiThread(() =>
               {
                   SimpleCursorAdapter _HesabGridAdapter = new HesabListGridview(this, Resource.Layout.HesabListGrid, cursors, from, to);
                    
                       gvHesab.Adapter = _HesabGridAdapter;
               });
                
                setListViewHeightBasedOnChildren(gvHesab);//بخورد Scroll برای حالتی که کل صفحه 
                gvHesab.TextFilterEnabled = true;
                
                EditText txtSearchHesabList = (EditText)FindViewById(Resource.Id.txtSearchHesabList);
                txtSearchHesabList.TextChanged += new EventHandler<Android.Text.TextChangedEventArgs>     
                (txtSearchHesabList_TextChanged);
                 
              
            }
            catch (Exception ex)
            {
                
            }
        }

    class HesabListGridview : SimpleCursorAdapter
    {
        ICursor c;
        //MatrixCursor cur;
        Context context;
        Activity activity;
        int idS;
        public HesabListGridview(Context context, int layout, ICursor c, string[] from, int[] to)
            : base(context, layout, c, from, to)
        {
            this.c = c; 
            this.context = context;
            this.activity = (Activity)context;

        }
        bool isFirst = true;
        public static int dtRowCount = 0;
        int CountRepeated = 0;
        public override Filter Filter
        {
            get
            {
                return base.Filter;
            }
        }
        public override IFilterQueryProvider FilterQueryProvider
        {
            get
            {
                return base.FilterQueryProvider;
            }
            set
            {
                base.FilterQueryProvider = value;
            }
        }
        public override View GetView(int position, View convertView, ViewGroup parent)
        {

            if (convertView == null)
                convertView = View.Inflate(context, Resource.Layout.HesabListGrid, null);
            View row = convertView;
            try
            {

                c.MoveToPosition(position);
                TextView txtHesabGrid_Coni = (TextView)convertView.FindViewById(Resource.Id.txt_HesabListGrid_Hesoen);
                TextView txtHesabGrid_Bde = (TextView)convertView.FindViewById(Resource.Id.txt_HesabListGrid_Hesol);
                TextView txtHesabGrid_Nab = (TextView)convertView.FindViewById(Resource.Id.txt_HesabListGrid_Heab);
                TextView txtHesabGrid_Cosab = (TextView)convertView.FindViewById(Resource.Id.txt_HesabListGrid_Coab);
                TextView txtHesabGrid_Row = (TextView)convertView.FindViewById(Resource.Id.txt_HesabListGrid_Row);
                TextView txtHesabGrid_Id = (TextView)convertView.FindViewById(Resource.Id.txt_HesabListGrid_Id);



                txtHesabGrid_Coni.SetText(c.GetString(c.GetColumnIndex("Hen")), TextView.BufferType.Normal);



                txtHesabGrid_Bde.SetText(c.GetString(c.GetColumnIndex("Hl")), TextView.BufferType.Normal);


                txtHesabGrid_Nab.SetText(c.GetString(c.GetColumnIndex("Heb")), TextView.BufferType.Normal);

                txtHesabGrid_Cosab.SetText(c.GetString(c.GetColumnIndex("Coab")), TextView.BufferType.Normal);

                txtHesabGrid_Row.SetText(c.GetInt(c.GetColumnIndex("_id")).ToString(), TextView.BufferType.Normal);

                txtHesabGrid_Id.SetText(c.GetString(c.GetColumnIndex("Id")), TextView.BufferType.Normal);
                txtHesabGrid_Id.Visibility = ViewStates.Gone;
                //txtHesabGrid_Id.Visibility = ViewStates.Invisible;
                if (position % 2 == 0)
                {

                    convertView.SetBackgroundColor(Android.Graphics.Color.ParseColor("#6bcdfb"));
                }
                else
                {
                    convertView.SetBackgroundColor(Android.Graphics.Color.ParseColor("#2cb8de"));
                }
                CountRepeated++;
               // MessageBoxAndroid.Show(context, CountRepeated.ToString()  + "\n" + dtRowCount.ToString());
                if (17 == CountRepeated)
                {
                    isFirst = false;
                }
                if (isFirst)
                {
                    
                    HorizontalScrollView hv = (HorizontalScrollView)activity.FindViewById(Resource.Id.scrollHesabListGrid);
                    hv.FullScroll(FocusSearchDirection.Left);

                }
            }
            catch (Exception ex)
            {
                    }

            //hv.ScrollTo(hv.Right + 80, hv.Top);
            return (row);
        }




    }
}

How can I create a search interface and make my search listed even the activity is from other activity but still within the application. Unsure | :~

yn

Use observer pattern.

This is XML parsing code:

Java

public class MainActivity extends Activity {

TextView textview;
NodeList nodelist;
ProgressDialog pDialog;
String url;
String DetailText;
String URL = "Here xml address";

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
textview = (TextView) findViewById(R.id.text);
new DownloadXML().execute(URL);
}

private class DownloadXML extends AsyncTask<String, Void, Void> {

@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setTitle("Loading...");
pDialog.setMessage("Wait...");
pDialog.setIndeterminate(false);
pDialog.show();
}

@Override
protected Void doInBackground(String... Url) {
try {
URL url = new URL(Url[0]);
DocumentBuilderFactory dbf = DocumentBuilderFactory
.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new InputSource(url.openStream()));
doc.getDocumentElement().normalize();
nodelist = doc.getElementsByTagName("point");

} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return null;

}

@Override
protected void onPostExecute(Void args) {

for (int temp = 0; temp < nodelist.getLength(); temp++) {
Node nNode = nodelist.item(temp);
if (nNode.getNodeType() == Node.ELEMENT_NODE) {
Element eElement = (Element) nNode;
textview.setText(textview.getText() + getNode("point", eElement) + "\n" + "\n");
textview.setText(textview.getText() + getNode("name", eElement) + "\n" + "\n");
textview.setText(textview.getText() + getNode("id", eElement) + "\n" + "\n");

Here i need to insert the result from parsing HTML page

}
}
pDialog.dismiss();
}
}


private static String getNode(String sTag, Element eElement) {
NodeList nlList = eElement.getElementsByTagName(sTag).item(0)
.getChildNodes();
Node nValue = (Node) nlList.item(0);
return nValue.getNodeValue();
}

This is HTML parsing code:

Java

import java.net.URL;
import org.htmlcleaner.CleanerProperties;
import org.htmlcleaner.HtmlCleaner;
import org.htmlcleaner.TagNode;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class HtmlCleanerStudyActivity extends Activity {

// HTML page
static final String BLOG_URL = "http://xjaphx.wordpress.com/";
// XPath query
static final String XPATH_STATS = "//div[@id='blog-stats']/ul/li";

@Override
public void onCreate(Bundle savedInstanceState) {
// init view layout
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

// decide output
String value = "";
try {
value = getBlogStats();
((TextView)findViewById(R.id.tv)).setText(value);
} catch(Exception ex) {
((TextView)findViewById(R.id.tv)).setText("Error");
}
}

/*
* get blog statistics
*/
public String getBlogStats() throws Exception {
String stats = "";

// config cleaner properties
HtmlCleaner htmlCleaner = new HtmlCleaner();
CleanerProperties props = htmlCleaner.getProperties();
props.setAllowHtmlInsideAttributes(false);
props.setAllowMultiWordAttributes(true);
props.setRecognizeUnicodeChars(true);
props.setOmitComments(true);

// create URL object
URL url = new URL(BLOG_URL);
// get HTML page root node
TagNode root = htmlCleaner.clean(url);

// query XPath
Object[] statsNode = root.evaluateXPath(XPATH_STATS);
// process data if found any node
if(statsNode.length > 0) {
// I already know there's only one node, so pick index at 0.
TagNode resultNode = (TagNode)statsNode[0];
// get text data from HTML node
stats = resultNode.getText().toString();
}

// return value
return stats;
}
}

Just need to show the result html parser, where I wrote "Here i need to insert the result from parsing HTML page"

Thanks in advance

Hi,
How to have this part of code in C# (monodroid).

C#

listView.post(new Runnable()
    {
        public void run()
        {
            listView.setSelection(position);
        }
    });

Just a guess, but would this work?

C#

listView.post(() => listView.setSelection(position));

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Hello,
i am new in Android.
i want to make 1 app which will give latitude and longitude using Network Provider.
when i click on start button app must be start in background even thought i removed app from Active Application.
inshort i have to make 1 process and 1 service which will be run in background.
is there any solution , let me know.
thank you

Service Tutorials can be found over here http://www.vogella.com/tutorials/AndroidServices/article.html[^]

I am using Ksoap2 to post my data from android mobile to database.I have a local server api of .Net to send this data .I am using following code to do this
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public class backMethod extends AsyncTask<String, Object, Object > {

private final ProgressDialog dialog = new ProgressDialog(MainActivity.this);

@Override
protected void onPreExecute() {

this.dialog.setMessage("Checking...");
this.dialog.show();
}
// @Override
// protected void onCancelled(Object result) {
//
// super.onCancelled(result);
// }

@Override
protected void onPostExecute(Object result) {
//Here All your UI part is Done

if (result != null) {

tv.setTag(result);

} else {
Toast.makeText(getApplicationContext(),
"Result Found is == " + result + "", Toast.LENGTH_LONG).show();

}
super.onPostExecute(result);
if (this.dialog.isShowing()) {

this.dialog.dismiss();
}
super.onPostExecute(result);
}

@Override
protected Object doInBackground(String... params) {

SoapObject request = new SoapObject(NAMESPACE, OPERATION_NAME);

SoapSerializationEnvelope envelope = new SoapSerializationEnvelope( SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
try {

HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);

androidHttpTransport.call(SOAP_ACTION, envelope);

response = (SoapObject) envelope.getResponse();
//here SoapPrimitive is an important part
Toast.makeText(getApplicationContext(), "SEND", Toast.LENGTH_LONG).show();
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), "NOT SEND", Toast.LENGTH_LONG).show();
}
return response;
}

Trying too much and goggling hard but fails to post the data.
Please help to resolve this issues.

SoapObject request = new SoapObject(NAMESPACE, SEND_METHOD_NAME);
SoapSerializationEnvelope envelope = getSOAPEnvelope();
envelope.dotNet = true;
envelope.bodyOut = request;

// InfoToSend - Web service parameter
request.addProperty("InfoToSend", <put your info>);

HttpTransportSE androidHttpTransport = new HttpTransportSE(URL, TIMEOUT);
androidHttpTransport.debug=true;

SoapObject resultsRequestSOAP;
try {
    androidHttpTransport.call(NAMESPACE + SEND_METHOD_NAME, envelope);
    resultsRequestSOAP = (SoapObject) envelope.bodyIn;
    String result = resultsRequestSOAP.getProperty(0).toString();

    if (result.equalsIgnoreCase(RESULT_OK)) success = true;
    else WS_ERROR = result;
}
catch (java.net.ConnectException ec) {
    WS_ERROR = context.getString(R.string.WS_BAD_ADDRESS)+": "+URL;
}
catch (java.net.SocketTimeoutException et) {
    WS_ERROR = context.getString(R.string.WS_TIMEOUT);
}
catch (java.net.UnknownHostException eh) {
    WS_ERROR = context.getString(R.string.WS_NO_NETWORK);
}
catch (Exception ex) {
    if (ex.toString().contains("FileNotFoundException")) {
        WS_ERROR = context.getString(R.string.WS_NO_DB);
    }
    else {
        WS_ERROR = ex.toString();
    }
}

Considering how many Android devices are ARM-powered, I'm surprised how often the name Intel crops up in the "Learn Android" page's list of Featured Articles.

what are c# methods??? Frown | :(

hi everybody
im a beginner at c#
now i want to know how to work with c# methods?
can you help me.... Frown | :(

Member 10452133 wrote:
i want to know how to work with c# methods?

Read .NET Book Zero[^], it explains C# in clear terms. When you have finished that you can move on to the C# tutorials[^]. Also, in future please use the correct forum, this one is for Android questions.

Veni, vidi, abiit domum

A "method" is similar to a "function"... only that methods are part of an object.

There should be plenty of C# guides online, just start somewhere and post questions in the proper CodeProject forums when you need clarification.

http://www.codeproject.com/Learn/Android/[^]
I can contribute to Learn Android Month with the documentation (I wrote yesterday)to build a native HTTP server through JNI in a Java app in CentOS:
https://skydrive.live.com/redir?resid=D7EC275E76D295CF%211009[^]

It's all part of the same project that also documents the same process in Windows 7
https://skydrive.live.com/redir?resid=D7EC275E76D295CF%21944[^]

Hi,
Thanks for Your notepad tutorial and coding. Its really helpful.I have on question. How can you delete a note in the list of notes that we saved? using delete button for each single note or using check box option and delete a note? can you please help me. and send me the code for that.

Thank You in Advance..

P.Vijaya Sundaram

Member 10439333 wrote:
Thanks for Your notepad tutorial and coding.

Which tutorial are you referring?
Post your question at Comment section of that tutorial/article. You could find the comment section at bottom of that tutorial/article.

And ask one question at a time. Don't expect code. Come with your code after your effort based on that tutorial.

I think you picked wrong forum(Based on your first sentence). And check this one before asking questions in future.
How to get an answer to your question?[^]

thatraja

Code converters | Education Needed | Plans