i have created a list filed which contains a Picture and some data in one row the picture and data i am getting from Json. My code is working but after getting the list my UI is hanging, There are Two steps 1) parse the data and image URL from json 2) and show in list field I'll post my code and screen shot of List below
public final class MyScreen extends MainScreen implements ListFieldCallback
{
HttpConnection httpConn;
int responseCode;
private static ListField _list;
private static Vector listElements = new Vector();
private static Vector elements = new Vector();
private static Vector contentelements = new Vector();
private static Vector datelements = new Vector();
private static Vector Imageselements = new Vector();
LabelField label;
String imagename;
Bitmap bit ;
Connection connectionthread;
public MyScreen()
{
// Set the displayed title of the screen
//setTitle("MyTitle");
_list = new ListField();
_list.invalidate();
_list.setEmptyString("please wait..", DrawStyle.HCENTER);
_list.setRowHeight(100);
_list.setCallback(this);
add(_list);
connectionthread = new Connection();
connectionthread.start();
}
public class Connection extends Thread{
public void run() {
try {
String httpURL = "http://192.168.1.91/bjp_app/program"+ getConnectionString();
httpConn = (HttpConnection) Connector.open(httpURL);
httpConn.setRequestMethod(HttpConnection.GET);
responseCode = httpConn.getResponseCode();
if (responseCode != HttpConnection.HTTP_OK)
{
throw new IOException("HTTP response code: "+ responseCode);
//System.out.println("\n Internaet problem HttpConnection. = "+responseCode);
}else{
System.out.println("\n elseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee= ");
System.out.println("\nHttpConnection.HTTP_OK = "+responseCode);
DataOutputStream _outStream = new DataOutputStream(httpConn.openDataOutputStream());
byte[] request_body = httpURL.getBytes();
for (int i = 0; i < request_body.length; i++) {
_outStream.writeByte(request_body[i]);
}
DataInputStream _inputStream = new DataInputStream(
httpConn.openInputStream());
StringBuffer _responseMessage = new StringBuffer();
int ch;
while ((ch = _inputStream.read()) != -1) {
_responseMessage.append((char) ch);
}
String res = (_responseMessage.toString());
String responce = res.trim();
System.out.println("\nresponce= "+responce);
JSONArray jsnarry = new JSONArray(responce);
System.out.println("\n--length----- "+jsnarry.length());
for (int i = 0; i < jsnarry.length(); i++){
JSONArray inerarray = jsnarry.getJSONArray(i);
System.out.println("\n-innerarray-length----- "+inerarray.length());
//for (int i1 = 0; i1 < inerarray.length(); i1++) {
//System.out.println("\n-inerarray-values----- "+inerarray.getString(i1));
String ID = inerarray.getString(0);
String TITTLE = inerarray.getString(1);
String CONTENT = inerarray.getString(2);
String DATE = inerarray.getString(3);
String IMAGE = inerarray.getString(4);
String six = inerarray.getString(5);
System.out.println("................................................");
System.out.println("ID= "+ID);
System.out.println("TITTLE= "+TITTLE);
System.out.println("CONTENT= "+CONTENT);
System.out.println("DATE= "+DATE);
System.out.println("IMAGE= "+IMAGE);
imagename = "http://sanjaytandon.in/admin/image/"+IMAGE.trim();
System.out.println("imagename= "+imagename);
//System.out.println("six "+six);
System.out.println("....................................................=");
// String jsonresponse = ""+inerarray.getString(i1);
//label = new LabelField(jsonresponse,LabelField.FOCUSABLE);
//add(label);
//}
elements.addElement(TITTLE);
contentelements.addElement(CONTENT);
datelements.addElement(DATE);
Imageselements.addElement(imagename);
}
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
try {
_list.setSize(elements.size());
_list.setSize(contentelements.size());
_list.setSize(datelements.size());
_list.setSize(Imageselements.size());
//invalidate();
} catch (Exception e) {
// TODO Auto-generated catch block
System.out.println("error _list.setSize"+e.toString());
}
}
});
}
} catch (Exception e) {
// TODO Auto-generated catch block
System.out.println("\nresponce code error "+e.toString());
UiApplication.getUiApplication().invokeLater(new Runnable() {
public void run() {
// TODO Auto-generated method stub
Status.show("Check your internet connection!", 2000);
}
});
}
}
}
public void drawListRow (ListField listField, Graphics graphics, int index, int y, int w) {
try {
graphics.setGlobalAlpha(255);
final int margin =5;
String tittle = (String)elements.elementAt(index);
String content = (String)contentelements.elementAt(index);
String date = (String)datelements.elementAt(index);
String imagesurl = (String)Imageselements.elementAt(index);
UrlToImage img = new UrlToImage( imagesurl);
bit =img.getbitmap();
graphics.drawText(tittle.trim(), 3*margin+bit.getWidth(), y+margin);
graphics.drawText(content.trim(), 3*margin+bit.getWidth(), y+ margin+30);
graphics.drawText(date.trim(), 3*margin+bit.getWidth(), y+ margin+60);
graphics.drawBitmap(2, y+margin+5, bit.getWidth(), bit.getHeight(), bit, 0, 0);
} catch (Exception e) {
// TODO Auto-generated catch block
System.out.println("error drawListRow"+e.toString());
}
}
public Object get(ListField listField, int index) {
// TODO Auto-generated method stub
return null;
}
public int getPreferredWidth(ListField listField) {
// TODO Auto-generated method stub
return 0;
}
public int indexOfList(ListField listField, String prefix, int start) {
// TODO Auto-generated method stub
return 0;
}
and MY UrlToImage.java class whcih downloads the images from URL
public class UrlToImage {
public static Bitmap _bmap;
UrlToImage(final String url){
HttpConnection connection = null;
InputStream inputStream = null;
EncodedImage bitmap;
byte[] dataArray = null;
try {
connection = (HttpConnection) Connector.open(url+ getConnectionString(), Connector.READ, true);
inputStream = connection.openInputStream();
byte[] responseData = new byte[10000];
int length = 0;
StringBuffer rawResponse = new StringBuffer();
while (-1 != (length = inputStream.read(responseData)))
{
rawResponse.append(new String(responseData, 0, length));
}
int responseCode = connection.getResponseCode();
if (responseCode != HttpConnection.HTTP_OK)
{
throw new IOException("HTTP response code: "+ responseCode);
}else{
System.out.println("\nHttpConnection.HTTP_OK = "+responseCode);
}
final String result = rawResponse.toString();
dataArray = result.getBytes();
/*System.out.println("\ndataArray.length = "+dataArray.length);
System.out.println("\ndataArray.length = "+dataArray[0]);
System.out.println("\ndataArray.length = "+dataArray[1]);
System.out.println("\ndataArray.length = "+dataArray[2]);
System.out.println("\ndataArray.length = "+dataArray[3]);*/
} catch (final Exception ex) {
}finally {
try {
inputStream.close();
inputStream = null;
connection.close();
connection = null;
}
catch(Exception e){
}
}
bitmap = EncodedImage.createEncodedImage(dataArray, 0,dataArray.length);
// this will scale your image acc. to your height and width of bitmapfield
int multH;
int multW;
int currHeight = bitmap.getHeight();
int currWidth = bitmap.getWidth();
multH= Fixed32.div(Fixed32.toFP(currHeight),Fixed32.toFP(80));//height
multW = Fixed32.div(Fixed32.toFP(currWidth),Fixed32.toFP(80));//width
bitmap = bitmap.scaleImage32(multW,multH);
_bmap=bitmap.getBitmap();
}
public String getConnectionString() {
String connectionString = null;
// Simulator behaviour is controlled by the USE_MDS_IN_SIMULATOR
// variable.
if (DeviceInfo.isSimulator()) {
connectionString = ";deviceside=true";
System.out.println("11111111111111111");
}
// Wifi is the preferred transmission method
else if (WLANInfo.getWLANState() == WLANInfo.WLAN_STATE_CONNECTED) {
connectionString = ";interface=wifi";
System.out.println("222222222222222222");
}
// Is the carrier network the only way to connect?
else if ((CoverageInfo.getCoverageStatus() & CoverageInfo.COVERAGE_DIRECT) == CoverageInfo.COVERAGE_DIRECT)
{
String carrierUid = getCarrierBIBSUid();
if (carrierUid == null) {
// Has carrier coverage, but not BIBS. So use the carrier's TCP
// network
System.out.println("33333333333333333");
connectionString = ";deviceside=true";
} else {
// otherwise, use the Uid to construct a valid carrier BIBS
// request
System.out.println("444444444444444444");
connectionString = ";deviceside=false;connectionUID="+carrierUid + ";ConnectionType=mds-public";
}
}
// Check for an MDS connection instead (BlackBerry Enterprise Server)
else if ((CoverageInfo.getCoverageStatus() & CoverageInfo.COVERAGE_MDS) == CoverageInfo.COVERAGE_MDS)
{
System.out.println("55555555555555555555");
connectionString = ";deviceside=false";
}
// If there is no connection available abort to avoid hassling the user
// unnecssarily.
else if (CoverageInfo.getCoverageStatus() == CoverageInfo.COVERAGE_NONE)
{
System.out.println("66666666666666666666");
connectionString = "none";
}
// In theory, all bases are covered by now so this shouldn't be reachable.But hey, just in case ...
else {
System.out.println("77777777777777777777777");
connectionString = ";deviceside=true";
}
return connectionString;
}
/**//**
* Looks through the phone's service book for a carrier provided BIBS
* network
*
* @return The uid used to connect to that network.
*//*
*/ private synchronized String getCarrierBIBSUid() {
ServiceRecord[] records = ServiceBook.getSB().getRecords();
int currentRecord;
for (currentRecord = 0; currentRecord < records.length; currentRecord++) {
if (records[currentRecord].getCid().toLowerCase().equals("ippp")) {
if (records[currentRecord].getName().toLowerCase()
.indexOf("bibs") >= 0) {
return records[currentRecord].getUid();
}
}
}
return null;
}
public Bitmap getbitmap()
{
return _bmap;
}
}
