Develop Reference

Android: JSONException: Value null at VesselList of type org.json.JSONObject$1 cannot be converted to JSONArray

I'trying to Parsing JSOn object but sometime it runs properly sometime getting followoing error:
org.json.JSONException: Value null at VesselList of type
org.json.JSONObject$1 cannot be converted to JSONArray
public void getCompanyDeatails()
{
String strUrl_companyDeatls = "http://103.24.4.60/CLASSNK1/MobileService.svc/Get_Company/Sync_Time/"+strSync_Time+"/Authentication_Token/"+str_Authentication_Token;
Log.e("strUrl_companyDeatls ", " = " + strUrl_companyDeatls);
InputStream inputStream = null;
try
{
HttpClient httpclient = new DefaultHttpClient();
HttpResponse httpResponse = httpclient.execute(new HttpGet(strUrl_companyDeatls));
inputStream = httpResponse.getEntity().getContent();
if (inputStream != null)
strResult = convertInputStreamToString(inputStream);
else
strResult = "Did not work!";
} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}
String jsonStr = strResult;
Log.e("jsonStr ", " = " + jsonStr);
if (jsonStr != null)
try {
JSONObject jsonObj = new JSONObject(jsonStr);
String jsonResult = jsonObj.toString().trim();
Log.e("jsonResult ", " = " + jsonResult);
JSONObject companyList = jsonObj.getJSONObject("Get_CompanyResult");
Log.e("companyList ", " = " + companyList.toString());
JSONArray jarr = jsonObj.getJSONArray("CompanylList");
Log.e("jarr ", " = " + jarr.toString());
for (int i = 0; i < jarr.length(); i++) {
JSONObject jobCompanyDetails = jarr.getJSONObject(i);
str_CompanyId = jobCompanyDetails.getString("Company_ID");
str_CompanyName = jobCompanyDetails.getString("Company_Name");
Log.e("str_CompanyId ", " = " + str_CompanyId);
Log.e("str_CompanyName ", " = " + str_CompanyName);
if (dbhelper.isTitleExist(str_CompanyId)) {
//Upadte
dbhelper.updatedetails(str_CompanyId, str_CompanyName);
Log.e("Data updated in ", "Company Table !!");
} else {
//insert
dbhelper.insertCompany(str_CompanyId, str_CompanyName);
Log.e("Data inserted in ", "Company Table !!");
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
this is my JSON String
{"Get_CompanyResult":{"CompanylList":[{"Company_ID":93,"Company_Name":"SeaChange"},{"Company_ID":97,"Company_Name":"VM 2"}],"Sync_Time":"2015-09-11 12:44:17.533"}}
Is this code is right?

Here:
JSONArray jarr = jsonObj.getJSONArray("CompanylList");
line causing issue because CompanylList JSONArray is inside Get_CompanyResult JSONObject instead of main which is jsonObj.
Get CompanylList JSONArray from companyList JSONObject:
JSONArray jarr = companyList.getJSONArray("CompanylList");

Change your code according to here :
public void getCompanyDeatails() {
String strUrl_companyDeatls = "http://103.24.4.60/CLASSNK1/MobileService.svc/Get_Company/Sync_Time/" + strSync_Time + "/Authentication_Token/" + str_Authentication_Token;
Log.e("strUrl_companyDeatls ", " = " + strUrl_companyDeatls);
InputStream inputStream = null;
String strResult = null;
try {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse httpResponse = httpclient.execute(new HttpGet("strUrl_companyDeatls"));
inputStream = httpResponse.getEntity().getContent();
// strResult = "{\\\"Get_CompanyResult\\\":{\\\"CompanylList\\\":[{\\\"Company_ID\\\":93,\\\"Company_Name\\\":\\\"SeaChange\\\"},{\\\"Company_ID\\\":97,\\\"Company_Name\\\":\\\"VM 2\\\"}],\\\"Sync_Time\\\":\\\"2015-09-11 12:44:17.533\\\"}}";
String jsonStr=null;
if (inputStream != null) {
strResult = convertInputStreamToString(inputStream);
jsonStr = strResult;
}
Log.e("jsonStr ", " = " + jsonStr);
if (jsonStr != null) {
JSONObject jsonObj = new JSONObject(jsonStr);
String jsonResult = jsonObj.toString().trim();
Log.e("jsonResult ", " = " + jsonResult);
JSONObject companyList = jsonObj.getJSONObject("Get_CompanyResult");
Log.e("companyList ", " = " + companyList.toString());
JSONArray jarr = companyList.getJSONArray("CompanylList");
Log.e("jarr ", " = " + jarr.toString()); // error was here. You need to use companyList json object because it contains company list.
for (int i = 0; i < jarr.length(); i++) {
JSONObject jobCompanyDetails = jarr.getJSONObject(i);
String str_CompanyId = jobCompanyDetails.getString("Company_ID");
String str_CompanyName = jobCompanyDetails.getString("Company_Name");
Log.e("str_CompanyId ", " = " + str_CompanyId);
Log.e("str_CompanyName ", " = " + str_CompanyName);
// if (dbhelper.isTitleExist(str_CompanyId)) {
// //Upadte
// dbhelper.updatedetails(str_CompanyId, str_CompanyName);
// Log.e("Data updated in ", "Company Table !!");
// } else {
//
// //insert
// dbhelper.insertCompany(str_CompanyId, str_CompanyName);
// Log.e("Data inserted in ", "Company Table !!");
// }
}
}
} catch (JSONException e) {
e.printStackTrace();
} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}
}
Note :
There is no need to use nested try and catch.
For 'strResult = "Did not work!";', always make sure that every
exception handled well (at checkpoint of jsonstr is null or not you
can not identify error occurred at parsing input stream can lead to
serious bugs).
HttpClient is deprecated so make sure you use latest version of any
third party library like Volley or Retrofit for network
operation and GSON for parsing response. It will minimize your
efforts.
Thanks.

Why the Views are not updated with JSON parsed information

I'm having Problem in updating JSON parsed informations in my Views. Nothing is problem with getting JSON text from internet it works fine. I hope parsing process also looks good. Im having problem with Displaying contents in the Views.
package rev.app.revlearningdemo;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
public class JsonFromInternet extends Activity {
String jsonText, name, weather_main, description, lon, lat, temp, pressure,
humidity, temp_min, temp_max, speed, deg;
long dt, sunrise, sunset;
TextView area, info, main;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.weather);
area = (TextView) findViewById(R.id.weatherAreaName);
info = (TextView) findViewById(R.id.weatherInfo);
main = (TextView) findViewById(R.id.weatherMain);
Thread net = new Thread() {
public void run() {
URL url;
BufferedReader buff = null;
StringBuilder build = new StringBuilder();
try {
url = new URL(
"http://api.openweathermap.org/data/2.5/weather?q=Madurai,in");
buff = new BufferedReader(new InputStreamReader(
url.openStream(), "UTF-8"));
for (String l; (l = buff.readLine()) != null;)
build.append(l.trim());
} catch (IOException e1) {
Log.e("REV DEMO", "ERROR");
} finally {
if (buff != null)
try {
buff.close();
} catch (IOException e) {
Log.e("REV DEMO", "ERROR");
}
jsonText = build.toString();
interrupt();
}
};
};
net.start();
if (net.getState()==Thread.State.TERMINATED) {
parseJsonText(jsonText);
area.setText(name);
info.setText(description + "\n" + "Longitude, Lattitude " + lon
+ ", " + lat + "\nTemperature " + temp + "\n(Min:"
+ temp_min + ", Max:" + temp_max + ")\nPressure "
+ pressure + "\nHumidity " + humidity + "\nWind Speed "
+ speed + ", direction " + deg);
main.setText(weather_main);
}
}
private void parseJsonText(String jsonFromInternet) {
JSONObject root, coord, main, wind, sys, weather;
try {
root = new JSONObject(jsonFromInternet);
coord = root.getJSONObject("coord");
lon = coord.optString("lon");
lat = coord.optString("lat");
main = root.getJSONObject("main");
temp = main.optString("temp");
pressure = main.optString("pressure");
humidity = main.optString("humidity");
temp_min = main.optString("temp_min");
temp_max = main.optString("temp_max");
wind = root.getJSONObject("wind");
speed = wind.optString("speed");
deg = wind.optString("deg");
sys = root.getJSONObject("sys");
sunrise = sys.optLong("sunrise");
sunset = sys.optLong("sunset");
dt = root.optLong("dt");
name = root.optString("name");
weather = root.optJSONArray("weather").getJSONObject(0);
weather_main = weather.optString("main");
description = weather.optString("description");
} catch (JSONException e) {
e.printStackTrace();
}
}
}

You start asynchronous Thread to download the JSON and it means that your views are getting updated immediately (when your jsonText is not initialized yet).
Move updating your views into the end of run() method and update your views when you finished parsing data, not earlier. Warning: to call setText from thread you will have to use runOnUiThread method.
Thread net = new Thread() {
public void run() {
URL url;
BufferedReader buff = null;
StringBuilder build = new StringBuilder();
try {
url = new URL(
"http://api.openweathermap.org/data/2.5/weather?q=Madurai,in");
buff = new BufferedReader(new InputStreamReader(
url.openStream(), "UTF-8"));
for (String l; (l = buff.readLine()) != null;)
build.append(l.trim());
// parse and update views now:
jsonText = build.toString();
parseJsonText(jsonText);
runOnUiThread(new Runnable() {
#Override
public void run() {
area.setText(name);
info.setText(description + "\n" + "Longitude, Lattitude " + lon
+ ", " + lat + "\nTemperature " + temp + "\n(Min:"
+ temp_min + ", Max:" + temp_max + ")\nPressure "
+ pressure + "\nHumidity " + humidity + "\nWind Speed "
+ speed + ", direction " + deg);
main.setText(weather_main);
}
});
} catch (IOException e1) {
Log.e("REV DEMO", "ERROR");
} finally {
if (buff != null)
try {
buff.close();
} catch (IOException e) {
Log.e("REV DEMO", "ERROR");
}
interrupt();
}
};
};

How to display image based on weather from drawable

i would like to display an image based on the weather.
The image that I'm getting from is from drawable.
For example :
if the code = 30, it will display rainy day icon
I'm retrieving it from
<yweather:condition text="Light Rain with Thunder" code="4" temp="25" date="Thu, 18 Jul 2013 7:58 am SGT" />
Here is my code
MainActivity.java
public class MainActivity extends Activity {
TextView weather;
ImageView image;
class MyWeather{
String conditiontext;
String conditiondate;
String numberOfForecast;
String forecast;
public String toString(){
return "\n- "
+ "Weather:" + image + "\n"
+ "Condition: " + conditiontext + "\n"
+ conditiondate +"\n"
+ "\n"
+ "number of forecast: " + numberOfForecast + "\n"
+ forecast;
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
weather = (TextView)findViewById(R.id.weather);
image = (ImageView)findViewById(R.id.image);
Thread myThread = new Thread(new Runnable(){
#Override
public void run() {
String weatherString = QueryYahooWeather();
Document weatherDoc = convertStringToDocument(weatherString);
final MyWeather weatherResult = parseWeather(weatherDoc);
runOnUiThread(new Runnable(){
#Override
public void run() {
weather.setText(weatherResult.toString());
}});
}});
myThread.start();
}
private MyWeather parseWeather(Document srcDoc){
MyWeather myWeather = new MyWeather();
//<yweather:condition.../>
Node conditionNode = srcDoc.getElementsByTagName("yweather:condition").item(0);
if(conditionNode.getTextContent().equals("11")){
image.setImageResource(R.drawable.logo);
}
else {
image.setImageResource(R.drawable.old);
}
myWeather.conditiontext = conditionNode.getAttributes()
.getNamedItem("text")
.getNodeValue()
.toString();
myWeather.conditiondate = conditionNode.getAttributes()
.getNamedItem("date")
.getNodeValue()
.toString();
//Added to get elements of <yweather:forecast.../>
NodeList forecastList = srcDoc.getElementsByTagName("yweather:forecast");
myWeather.forecast = "";
if(forecastList.getLength() > 0){
myWeather.numberOfForecast = String.valueOf(forecastList.getLength());
for(int i = 0; i < forecastList.getLength(); i++){
Node forecastNode = forecastList.item(i);
myWeather.forecast +=
forecastNode
.getAttributes()
.getNamedItem("date")
.getNodeValue()
.toString() + " " +
forecastNode
.getAttributes()
.getNamedItem("text")
.getNodeValue()
.toString() +
" High: " + forecastNode
.getAttributes()
.getNamedItem("high")
.getNodeValue()
.toString() +
" Low: " + forecastNode
.getAttributes()
.getNamedItem("low")
.getNodeValue()
.toString() + "\n";
}
}else{
myWeather.numberOfForecast = "No forecast";
}
return myWeather;
}
private Document convertStringToDocument(String src){
Document dest = null;
DocumentBuilderFactory dbFactory =
DocumentBuilderFactory.newInstance();
DocumentBuilder parser;
try {
parser = dbFactory.newDocumentBuilder();
dest = parser.parse(new ByteArrayInputStream(src.getBytes()));
} catch (ParserConfigurationException e1) {
e1.printStackTrace();
Toast.makeText(MainActivity.this,
e1.toString(), Toast.LENGTH_LONG).show();
} catch (SAXException e) {
e.printStackTrace();
Toast.makeText(MainActivity.this,
e.toString(), Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(MainActivity.this,
e.toString(), Toast.LENGTH_LONG).show();
}
return dest;
}
private String QueryYahooWeather(){
String qResult = "";
String queryString = "http://weather.yahooapis.com/forecastrss?w=1062617&u=c";
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(queryString);
try {
HttpEntity httpEntity = httpClient.execute(httpGet).getEntity();
if (httpEntity != null){
InputStream inputStream = httpEntity.getContent();
Reader in = new InputStreamReader(inputStream);
BufferedReader bufferedreader = new BufferedReader(in);
StringBuilder stringBuilder = new StringBuilder();
String stringReadLine = null;
while ((stringReadLine = bufferedreader.readLine()) != null) {
stringBuilder.append(stringReadLine + "\n");
}
qResult = stringBuilder.toString();
}
} catch (ClientProtocolException e) {
e.printStackTrace();
Toast.makeText(MainActivity.this,
e.toString(), Toast.LENGTH_LONG).show();
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(MainActivity.this,
e.toString(), Toast.LENGTH_LONG).show();
}
return qResult;
}
}

Still not working?
I made the project myself, and if you do it like this it will work. :)
The R.id and drawables are not the same, you need to change those to make it work
TextView weather;
ImageView forecast;
private static Handler mHandler = new Handler();
class MyWeather{
String conditiontext;
String conditiondate;
String numberOfForecast;
String forecast;
public String forecastToString(){
return "\n- "
+ "Weather: " +"you wanted to have something here, I just dont understand what. " + "\n"
+ "Condition: " + conditiontext + "\n"
+ conditiondate +"\n"
+ "\n"
+ "number of forecast: " + numberOfForecast + "\n"
+ forecast;
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
weather = (TextView)findViewById(R.id.textView1);
forecast = (ImageView)findViewById(R.id.imageView1);
Thread myThread = new Thread(new Runnable(){
#Override
public void run() {
String weatherString = QueryYahooWeather();
Document weatherDoc = convertStringToDocument(weatherString);
final MyWeather weatherResult = parseWeather(weatherDoc);
runOnUiThread(new Runnable(){
#Override
public void run() {
weather.setText(weatherResult.forecastToString());
}});
}});
myThread.start();
}
private MyWeather parseWeather(Document srcDoc){
MyWeather myWeather = new MyWeather();
//<yweather:condition.../>
Node conditionNode = srcDoc.getElementsByTagName("yweather:condition").item(0);
String weatherCode = conditionNode.getAttributes()
.getNamedItem("code")
.getNodeValue()
.toString();
if(weatherCode.equals("28")){
mHandler.post(new Runnable() {
#Override
public void run() {
// This gets executed on the UI thread so it can safely modify
// Views
forecast.setImageResource(R.drawable.ic_launcher);
}
});
}
...

I found some problem in your code there is two image view
Image = (ImageView)findViewById(R.id.image);
Problem - : name of the image missing
ImageView foreImage = new ImageView(this);
foreImage.setImageResource(R.drawable.logo);
//Why are you using dynamic imageview
You should use Handler Thread for display image.

Import yahoo contacts into android application

Hey anybody can tell me how can i import all yahoo contacts into my android application please , show me proper way dont give me yahoo api etc if u have source code kindly post it
thank you

just create a layout with webview , and use this code to get contacts.
you need oauth libraries,. and replace consumer key and scret with yours.
public class YahooContacts extends BaseActivity {
private final String TAG = "yahoo_auth";
private static final String CONSUMER_KEY = "you_consumer_key";
private static final String CONSUMER_SECRET = "your_consumer_secret";
private static final String CALLBACK_SCHEME = "http";
private static final String CALLBACK_HOST = "www.blablablao.com";
private static final String CALLBACK_URL = CALLBACK_SCHEME + "://"
+ CALLBACK_HOST;
private String AUTH_TOKEN = null;
private String AUTH_TOKEN_SECRET = null;
private String AUTH_URL = null;
private String USER_TOKEN = null;
private String ACCESS_TOKEN = null;
private String ACCESS_TOKEN_SECRET = null;
private String mUSER_GUID = null;
private WebView mWebview;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.yahoo_layout);
mWebview = (WebView) findViewById(R.id.webview);
new getContactsTask().execute();
}
class getContactsTask extends AsyncTask<Void, Void, Void> {
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected Void doInBackground(Void... params) {
getAuthorizationToken();
getUserAutherization();
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
}
}
private void getAuthorizationToken() {
String requestPath = "https://api.login.yahoo.com/oauth/v2/get_request_token?oauth_consumer_key="
+ CONSUMER_KEY
+ "&oauth_nonce="
+ System.currentTimeMillis()
+ "x"
+ "&oauth_signature_method=PLAINTEXT"
+ "&oauth_signature="
+ CONSUMER_SECRET
+ "%26"
+ "&oauth_timestamp="
+ System.currentTimeMillis()
+ "&oauth_version=1.0"
+ "&xoauth_lang_pref=en-us"
+ "&oauth_callback=" + CALLBACK_URL;
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(requestPath);
try {
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String responseBody = httpclient.execute(httpget, responseHandler);
String[] data = responseBody.split("&");
AUTH_TOKEN = data[0].replace("oauth_token=", "");
AUTH_TOKEN_SECRET = data[1].replace("oauth_token_secret=", "");
AUTH_URL = data[3].replace("xoauth_request_auth_url=", "");
VIPLogger.info(TAG, "authToken" + AUTH_TOKEN);
VIPLogger.info(TAG, "authToken secret" + AUTH_TOKEN_SECRET);
} catch (Exception e) {
e.printStackTrace();
}
}
private void getUserAutherization() {
mWebview.getSettings().setJavaScriptEnabled(true);
mWebview.setWebViewClient(lWebviewClient);
mWebview.loadUrl("https://api.login.yahoo.com/oauth/v2/request_auth?oauth_token="
+ AUTH_TOKEN);
}
private void getAccessToken() {
String requestPath = "https://api.login.yahoo.com/oauth/v2/get_token?oauth_consumer_key="
+ CONSUMER_KEY
+ "&oauth_nonce="
+ System.currentTimeMillis()
+ "x"
+ "&oauth_signature_method=PLAINTEXT"
+ "&oauth_signature="
+ CONSUMER_SECRET
+ "%26"
+ AUTH_TOKEN_SECRET
+ "&oauth_timestamp="
+ System.currentTimeMillis()
+ "&oauth_version=1.0"
+ "&oauth_token="
+ AUTH_TOKEN
+ "&oauth_verifier="
+ USER_TOKEN;
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(requestPath);
try {
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String responseBody = httpclient.execute(httpget, responseHandler);
String[] data = responseBody.split("&");
ACCESS_TOKEN = data[0].replace("oauth_token=", "");
ACCESS_TOKEN_SECRET = data[1].replace("oauth_token_secret=", "");
mUSER_GUID = data[5].replace("xoauth_yahoo_guid=", "");
VIPLogger.info(TAG, "user guid: " + responseBody);
VIPLogger.info(TAG, "Access token: " + ACCESS_TOKEN);
getAllContacts();
} catch (Exception e) {
e.printStackTrace();
VIPLogger.error(TAG,
"error while fetching user guid and access token");
}
}
WebViewClient lWebviewClient = new WebViewClient() {
public void onPageStarted(WebView view, String url,
android.graphics.Bitmap favicon) {
if (url.contains("vipitservice")) {
mWebview.stopLoading();
int lastIndex = url.lastIndexOf("=") + 1;
VIPLogger.info(TAG, url.substring(lastIndex, url.length()));
USER_TOKEN = url.substring(lastIndex, url.length());
mWebview.setVisibility(View.GONE);
getAccessToken();
}
};
};
private void getAllContacts() {
HttpClient httpclient = new DefaultHttpClient();
String host_url = "http://social.yahooapis.com/v1/user/" + mUSER_GUID+ "/contacts";
String nonce = ""+System.currentTimeMillis();
String timeStamp = ""+(System.currentTimeMillis()/1000L);
try{
String params =
""+encode("oauth_consumer_key")+"=" + encode(CONSUMER_KEY)
+ "&"+encode("oauth_nonce")+"="+encode(nonce)
+ "&"+encode("oauth_signature_method")+"="+encode("HMAC-SHA1")
+ "&"+encode("oauth_timestamp")+"="+encode(timeStamp)
+ "&"+encode("oauth_token")+"="+ACCESS_TOKEN
+ "&"+encode("oauth_version")+"="+encode("1.0")
;
String baseString = encode("GET")+"&"+encode(host_url)+"&"+encode(params);
String signingKey = encode(CONSUMER_SECRET)+"&"+encode(ACCESS_TOKEN_SECRET);
VIPLogger.info(TAG, "base string: " + baseString);
String lSignature = computeHmac(baseString, signingKey);
VIPLogger.info(TAG, "signature: " + lSignature);
lSignature = encode(lSignature);
VIPLogger.info(TAG, "signature enacoded: " + lSignature);
String lRequestUrl = host_url
+ "?oauth_consumer_key="+CONSUMER_KEY
+ "&oauth_nonce="+nonce
+ "&oauth_signature_method=HMAC-SHA1"
+ "&oauth_timestamp="+timeStamp
+ "&oauth_token="+ACCESS_TOKEN
+ "&oauth_version=1.0"
+ "&oauth_signature="+lSignature
;
//VIPLogger.info(TAG, lRequestUrl.substring(1202));
HttpGet httpget = new HttpGet(lRequestUrl);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String responseBody = httpclient.execute(httpget, responseHandler);
VIPLogger.info(TAG, "contacts response: " + responseBody);
}catch(Exception e){
e.printStackTrace();
VIPLogger.error(TAG, "error while fetching user contacts");
}
}
public String computeHmac(String baseString, String key) {
try {
Mac mac = Mac.getInstance("HmacSHA1");
SecretKeySpec signingKey = new SecretKeySpec(key.getBytes("UTF-8"),
"HMAC-SHA1");
mac.init(signingKey);
byte[] digest = mac.doFinal(baseString.getBytes());
String result = Base64.encodeToString(digest, Base64.DEFAULT);
return result;
} catch (Exception e) {
e.printStackTrace();
VIPLogger.error(TAG, "error while generating sha");
}
return null;
}
public String encodeURIComponent(final String value) {
if (value == null) {
return "";
}
try {
return URLEncoder.encode(value, "utf-8")
// OAuth encodes some characters differently:
.replace("+", "%20").replace("*", "%2A")
.replace("%7E", "~");
// This could be done faster with more hand-crafted code.
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
public String encode(String input) {
StringBuilder resultStr = new StringBuilder();
for (char ch : input.toCharArray()) {
if (isUnsafe(ch)) {
resultStr.append('%');
resultStr.append(toHex(ch / 16));
resultStr.append(toHex(ch % 16));
} else {
resultStr.append(ch);
}
}
return resultStr.toString().trim();
}
private char toHex(int ch) {
return (char) (ch < 10 ? '0' + ch : 'A' + ch - 10);
}
private boolean isUnsafe(char ch) {
if (ch > 128 || ch < 0)
return true;
return " %$&+,/:;=?#<>#%".indexOf(ch) >= 0;
}
}

Android: Cannot show more than one image

I have the following main class and thread-TCP Client. The client runs in a loop, receives messages and passes it to main class. In the main class, I parse the message and try to show different images based on the name and value of the message received.
Ex: shiftDirection1
name: shiftDirection & value: 1
But I can show only the image corresponding to the first received message and the images corresponding to the remaining received messages cannot be displayed.
Please go through the code below and kindly suggest the mistake/problem and alternative ways.
Thank you for your time and efforts.
Madhu
main class:
public class TCPListen extends Activity implements TCPListener {
private TextView mTitle;
public String recData[] = new String[2];
String PresentGear = "0";
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TcpServiceHandler handler = new TcpServiceHandler(this,this);
Thread th = new Thread(handler);
th.start();
}
public String[] callCompleted(String source){
//Log.d("TCP", "Std parser " + source);
//mTitle.setText(source);
//String data[] = new String[2];
//if (source.matches("<MSG><N>.*</N><V>.*</V></MSG>")) {
Document doc = null;
try{
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
doc = (Document) db.parse(new ByteArrayInputStream(source.getBytes()));
NodeList n = doc.getElementsByTagName("N");
Node nd = n.item(0);
String msgName = nd.getFirstChild().getNodeValue();
NodeList n1 = doc.getElementsByTagName("V");
Node nd1 = n1.item(0);
String tmpVal = nd1.getFirstChild().getNodeValue();
recData[0] = msgName;
recData[1] = tmpVal;
if (recData[0].equals("currGear")) PresentGear = recData[1];
Log.d("TCP", "Inside Std parser " + recData[0] + " " + recData[1]);
actionOnData(recData[0], recData[1]);
}
catch(Exception e){
e.printStackTrace();
}
Log.d("TCP", "Just outside Std parser " + recData[0] + " " + recData[1]);
return recData;
//} else Log.d("TCP", "Message in wrong format " + source);
//mTitle.setText("Message in wrong format " + source);
//return data;
}
//Function to display driver messages/images based on individual messages
public void actionOnData(String name, String value) {
String tempName = name;
String tempVal = value;
setContentView(R.layout.image);
ImageView showImage = (ImageView) findViewById(R.id.imageView1);
//Log.d("TCP", "------------>" + tempName + " " + tempVal);
if (tempName.equals("shiftDirection") && tempVal.equals("1")) {
//setContentView(R.layout.image);
//TextView text_top = (TextView) findViewById(R.id.textView1);
//showImage = (ImageView) findViewById(R.id.imageView1);
//text_bottom.setText(Info[1]);
showImage.setImageResource(R.drawable.shift_up);
Log.d("TCP", "1------------>" + showImage);
} else if (tempName.equals("shiftDirection") && tempVal.equals("-1")) {
//setContentView(R.layout.image);
//TextView text_bottom = (TextView) findViewById(R.id.textView2);
//Resources res = getResources();
//Drawable drawable = res.getDrawable(R.drawable.shift_down);
//showImage = (ImageView) findViewById(R.id.imageView1);
//text_bottom.setText(Info[1]);
showImage.setImageResource(R.drawable.shift_down);
} else if (tempName.equals("recomGear") && tempVal != null) {
Log.d("TCP", "3------------>" + tempName + " " + tempVal);
Integer msgValue = Integer.parseInt(recData[1]);
//Integer CurrentGear = (msgValue) - 1;
//Log.d("TCP","in DA Images. Current gear: " + CurrentGear);
//String Gear = Integer.toString(CurrentGear);
setContentView(R.layout.image);
TextView text_top = (TextView) findViewById(R.id.textView1);
TextView text_bottom = (TextView) findViewById(R.id.textView2);
showImage = (ImageView) findViewById(R.id.imageView1);
showImage.setImageResource(R.drawable.shift_up);
text_bottom.setText(PresentGear);
text_top.setText(tempVal);
} else if (tempName.equals("currGear") && tempVal != null) {
Log.d("TCP", "4------------>" + tempName + " " + tempVal);
PresentGear = tempVal;
//Log.d("TCP","in DA Images. Present gear1: " + PresentGear);
setContentView(R.layout.image);
TextView text_bottom = (TextView) findViewById(R.id.textView2);
text_bottom.setText(PresentGear);
} else if (tempName.equals("shiftDirection") && tempVal.equals("0")) {
Log.d("TCP", "5------------>" + tempName + " " + tempVal);
Log.d("TCP","in DA Images. Present gear: " + PresentGear);
setContentView(R.layout.image);
TextView text_bottom = (TextView) findViewById(R.id.textView2);
//TextView text_top = (TextView) findViewById(R.id.textView1);
//text_top.setText("Go on");
text_bottom.setText(PresentGear);
}
}
}
Only the image corresponding to the first if case is displayed. The program control enters the second if loop but does not show the image there.
Interface:
public interface TCPListener {
public String[] callCompleted(String msg);
}
Thread (TCP Client):
public class TcpServiceHandler implements Runnable {
TCPListener _listener;
private Activity _act;
public BufferedReader in;
public TcpServiceHandler(TCPListener listener, Activity act){
_listener = listener;
_act = act;
}
public synchronized void run() {
// TODO Auto-generated method stub
//if(socket==null){
try {
//InetAddress serverAddr = InetAddress.getByName("192.168.178.25");
Socket socket = new Socket("192.168.62.23", 1200, true);
//
//while(true){
try {
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
final int delay = 100;
final Timer _timer = new Timer();
_timer.scheduleAtFixedRate(new TimerTask() {
public void run(){
String str;
try {
str = in.readLine();
_listener.callCompleted(str);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}, 0, delay);
//final String str = in.readLine();
//this._act.runOnUiThread(new Runnable(){
//public void run() {
// _listener.callCompleted(str);
// }
//});
}
catch(Exception e){
e.printStackTrace();
}
//}
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

You might check 2 things:
Your TcpServiceHandler is a Runnable of a thread but there is no loop in run(). The _timer you define inside this method might be dead and gone before it's work is done.
Are you changing the UI from a background thread? This is not a good idea in general.
Check AsyncTask which is a handy tool to run operations in the background.