Return ArrayList from async task

Return ArrayList from async task - android

1) I already read all questions about that here, so please tell me more, than just url from SO...
2) I want to return only ONE variable from asynctask, but it can be message error or user details. So I decided to return ArrayList with indexes 0 (for error messages) and 1 (for success).
AsyncTask
public class LoginGet extends AsyncTask<String, ProgressBar, ArrayList<String>> {
...
public ArrayList<String> result = new ArrayList<String>();
public LoginGet(Context mContext, String loginText, String passwordText) {
//Get values form LoginActivity
}
protected void onPreExecute(){
super.onPreExecute();
// progressDialog
}
#Override
protected ArrayList doInBackground(String... arg0){
try {
// Making HTTP Request
try {
// Creating HTTP client
...
...
JSONObject jObject = new JSONObject(json);
success = jObject.getString("success");
result.add(0, "");
result.add(1, "");
if (success != null) {
if (success == "1") {
result.add(1, jObject.getString("hash"));
return result;
} else if (success == "0") {
result.add(0, jObject.getString("error"));
return result;
}
} else {
result.add(0, "Error while logging.");
return result;
}
// writing response to log
Log.d("Http Response:", response.toString());
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}catch (Exception e) {
}
return result;
}
#Override
protected void onPostExecute(ArrayList<String> result) {
((LoginActivity)context).getResult(result);
progressDialog.dismiss();
}
}
LoginActivity
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
...
loginButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
...
if (loginText.compareTo("") == 0 || passwordText.compareTo("") == 0) {
...
}else{
LoginGet loginPost = new LoginGet(LoginActivity.this,loginText,passwordText);
loginPost.execute();
}
}
});
}
// Get result from asynctask LoginGet
public void getResult(ArrayList<String> result){
if (result.get(0) != "") {
loginButton.setEnabled(true);
Toast.makeText(LoginActivity.this, result.get(0), Toast.LENGTH_SHORT).show();
} else if (result.get(1) != "") {
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(LoginActivity.this);
SharedPreferences.Editor editor = preferences.edit();
editor.putString("Login", result.get(1));
editor.commit();
Intent intent = new Intent(LoginActivity.this, MainActivity.class);
startActivity(intent);
}
}
Error:
java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
at java.util.ArrayList.get(ArrayList.java:308)
at cz.jacon.smsapp.LoginActivity.getResult(LoginActivity.java:57)
at cz.jacon.smsapp.background.LoginGet.onPostExecute(LoginGet.java:121)
at cz.jacon.smsapp.background.LoginGet.onPostExecute(LoginGet.java:30)
3) In my AsyncTask I have result.add(0, ""); and result.add(1, "");, so why is the ArrayList size 0?

In my opinion result.add(0, ""); isn't even reached, since the try block might be failing.
And sadly you have an empty catch block, just waiting to skip them errors:
catch (Exception e) {
}
Your solution would be to add these
result.add(0, "");
result.add(1, "");
to the very beginning of the doInBackground or even to the constructor and you should be fine.

Related

Paytm Sdk Version 2 - Paytm integration in Android App throwing OOPS error in doInBackground

I am integrating Paytm SDK in my Android Application. I have to POST ORDER ID and callbackurl along with other paytm credentials. All values are passing correctly. But OOPS error is displaying.
Code
public class Paytmgateway extends Activity {
Context context;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.merchantapp);
context = this;
// initOrderId();
getWindow().setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);
}
// This is to refresh the order id: Only for the Sample App’s purpose.
#Override
protected void onStart() {
super.onStart();
// initOrderId();
getWindow().setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);
}
public void onStartTransaction(View view) throws InterruptedException, ExecutionException {
String myorder = "ORDER7999883";
String mycallback= "https://securegw.paytm.in/theia/paytmCallback?ORDER_ID="+myorder;
PostAsync postAsync= new PostAsync();
postAsync.execute(myorder,mycallback);
}
class PostAsync extends AsyncTask<String, String, JSONObject> {
JSONParser jsonParser = new JSONParser();
private ProgressDialog pDialog;
private static final String LOGIN_URL = "http://192.168.1.4/paytmtest/generateChecksum.php";
private static final String TAG_SUCCESS = "success";
private static final String TAG_MESSAGE = "message";
protected JSONObject doInBackground(String... args) {
try {
HashMap<String, String> para = new HashMap<>();
para.put("myorder", args[0]);
para.put("mycallback", args[1]);
Log.d("request", "starting");
JSONObject json = jsonParser.makeHttpRequest(
LOGIN_URL, "POST", para);
if (json != null) {
Log.d("JSON result", json.toString());
return json;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
protected void onPostExecute(JSONObject json) {
PaytmPGService Service = PaytmPGService.getProductionService();
if (json != null) {
Toast.makeText(Paytmgateway.this,"Server Response"+json.toString(), Toast.LENGTH_LONG).show();
String finalresult=json.toString();
try {
JSONObject mJsonObject=new JSONObject(finalresult);
Map paramMap = new HashMap();
System.out.println("Hi");
paramMap.put("MID", mJsonObject.getString("MID"));
System.out.println(mJsonObject.getString("MID"));
// paramMap.put(“ORDER_ID”, order_id);
paramMap.put("ORDER_ID", mJsonObject.getString("ORDER_ID"));
System.out.println(mJsonObject.getString("ORDER_ID"));
// paramMap.put(“CUST_ID”, cust_id);
paramMap.put("CUST_ID",mJsonObject.getString("CUST_ID"));
System.out.println(mJsonObject.getString("CUST_ID"));
// paramMap.put(“INDUSTRY_TYPE_ID”,industry_type);
paramMap.put("INDUSTRY_TYPE_ID",mJsonObject.getString("INDUSTRY_TYPE_ID"));
System.out.println(mJsonObject.getString("INDUSTRY_TYPE_ID"));
// paramMap.put(“CHANNEL_ID”, “WAP”);
paramMap.put("CHANNEL_ID", mJsonObject.getString("CHANNEL_ID"));
System.out.println(mJsonObject.getString("CHANNEL_ID"));
// paramMap.put(“TXN_AMOUNT”,txn_amount);
paramMap.put("TXN_AMOUNT", "1");
System.out.println(mJsonObject.getString("TXN_AMOUNT"));
// paramMap.put(“WEBSITE”, “APP_STAGING”);
paramMap.put("WEBSITE" , mJsonObject.getString("WEBSITE"));
System.out.println(mJsonObject.getString("WEBSITE"));
// paramMap.put(“CALLBACK_URL”,callback);
paramMap.put("CALLBACK_URL" , mJsonObject.getString("CALLBACK_URL"));
System.out.println(mJsonObject.getString("CALLBACK_URL"));
// paramMap.put(“CHECKSUMHASH”,checksum);
paramMap.put("CHECKSUMHASH",mJsonObject.getString("CHECKSUMHASH"));
System.out.println("MYCHECK"+mJsonObject.getString("CHECKSUMHASH"));
PaytmOrder Order = new PaytmOrder(paramMap);
System.out.println("sumithra"+paramMap);
Service.initialize(Order, null);
Service.startPaymentTransaction(Paytmgateway.this, true, true,
new PaytmPaymentTransactionCallback() {
#Override
public void someUIErrorOccurred(String inErrorMessage) {
Toast.makeText(getApplicationContext(),"UI Error" , Toast.LENGTH_LONG).show();
}
#Override
public void onTransactionResponse(Bundle inResponse) {
// Log.d(“LOG”, “Payment Transaction : ” + inResponse);
Log.d("LOG", "Payment Transaction : "+inResponse);
Toast.makeText(getApplicationContext(),"Payment Transaction Response" + inResponse.toString(), Toast.LENGTH_LONG).show();
}
#Override
public void networkNotAvailable() {
Toast.makeText(getApplicationContext(),"No Network Available" , Toast.LENGTH_LONG).show();
}
#Override
public void clientAuthenticationFailed(String inErrorMessage) {
Toast.makeText(getApplicationContext(),"Client Authentication Failed" , Toast.LENGTH_LONG).show();
}
#Override
public void onErrorLoadingWebPage(int iniErrorCode,
String inErrorMessage, String inFailingUrl) {
Toast.makeText(getApplicationContext(),"Error Loading Webpage" , Toast.LENGTH_LONG).show();
}
// had to be added: NOTE
#Override
public void onBackPressedCancelTransaction() {
// TODO Auto-generated method stub
}
#Override
public void onTransactionCancel(String inErrorMessage,
Bundle inResponse) {
Log.d("LOG", "Payment Transaction Failed" + inErrorMessage);
Toast.makeText(getBaseContext(),"Payment Transaction Failed", Toast.LENGTH_LONG).show();
}
});
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
My Android Studio Monitor output of
System.out.println(paramMap);
is
05-22 15:43:33.801 15328-15328/com.example.merchantapp I/System.out: {MID=Bigfix12826731009600, CALLBACK_URL=https://securegw.paytm.in/theia/paytmCallback?ORDER_ID=ORDER7999883, TXN_AMOUNT=1.00, ORDER_ID=ORDER7999883, WEBSITE=BigfixGadgetWAP, INDUSTRY_TYPE_ID=Retail109, CHECKSUMHASH=HxSimAQAYRsDhJ7XX6JXT+cilxFNdSc4Pb3jr5AE5dddSavv6UD3DJffBHtcHVwQbBMYYHc850/OdZretSWIeo3m/uC0/FUA9wpO1Hgs/jY=, CHANNEL_ID=WAP, CUST_ID=25654}
Which means the two parameter values are posting successfully and i can be able to GET them also. But the following error is displaying
enter image description here
But if if i use the below code , It is working successfully
public class Paytm extends Activity {
String callback,website;
Context context;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.merchantapp);
context = this;
// initOrderId();
getWindow().setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);
}
// This is to refresh the order id: Only for the Sample App’s purpose.
#Override
protected void onStart() {
super.onStart();
// initOrderId();
getWindow().setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);
}
public void onStartTransaction(View view) throws InterruptedException, ExecutionException {
PaytmPGService Service = PaytmPGService.getProductionService();
Map paramMap = new HashMap();
String mid="",order_id="",cust_id="",industry_type="",txn_amount="",checksum="";
Log.d("before request", "some");
JSONObject mJsonObject = null;
// String url="http://paytmtest.azurewebsites.net/APP/generateChecksum.php";
String url="http://192.168.1.4/paytmtest/generateChecksum.php";
MyAsyncTask myAsyncTask=new MyAsyncTask();
// String json = myAsyncTask.execute(url).get();
String json = (String) myAsyncTask.execute(url).get();
try {
mJsonObject=new JSONObject(json);
} catch (JSONException e) {
e.printStackTrace();
}
try {
//mid = mJsonObject.getString("MID");
mid="Bigfix12826731009600";
// order_id=mJsonObject.getString(“ORDER_ID”);
order_id=mJsonObject.getString("ORDER_ID");
// cust_id = mJsonObject.getString(“CUST_ID”);
cust_id=mJsonObject.getString("CUST_ID");
//callback = mJsonObject.getString("CALLBACK_URL");
callback= "https://securegw.paytm.in/theia/paytmCallback?ORDER_ID="+order_id;
//website = mJsonObject.getString("WEBSITE");
website="BigfixGadgetWAP";
//industry_type = mJsonObject.getString("INDUSTRY_TYPE_ID");
industry_type="Retail109";
txn_amount = mJsonObject .getString("TXN_AMOUNT");
// checksum = mJsonObject.getString(“CHECKSUMHASH”);
checksum = mJsonObject.getString("CHECKSUMHASH");
} catch (JSONException e) {
e.printStackTrace();
}
// Log.d(“after request”, “some”);
Log.d("after request", "some");
// paramMap.put(“MID”, mid);
paramMap.put("MID", mid);
// paramMap.put(“ORDER_ID”, order_id);
paramMap.put("ORDER_ID", order_id);
// paramMap.put(“CUST_ID”, cust_id);
paramMap.put("CUST_ID",cust_id);
// paramMap.put(“INDUSTRY_TYPE_ID”,industry_type);
paramMap.put("INDUSTRY_TYPE_ID",industry_type);
// paramMap.put(“CHANNEL_ID”, “WAP”);
paramMap.put("CHANNEL_ID", "WAP");
// paramMap.put(“TXN_AMOUNT”,txn_amount);
paramMap.put("TXN_AMOUNT", txn_amount);
// paramMap.put(“WEBSITE”, “APP_STAGING”);
paramMap.put("WEBSITE" , website);
// paramMap.put(“CALLBACK_URL”,callback);
paramMap.put("CALLBACK_URL" , callback);
// paramMap.put(“CHECKSUMHASH”,checksum);
paramMap.put("CHECKSUMHASH",checksum);
System.out.println("sumithra"+paramMap);
PaytmOrder Order = new PaytmOrder(paramMap);
Service.initialize(Order, null);
Service.startPaymentTransaction(this, true, true,
new PaytmPaymentTransactionCallback() {
#Override
public void someUIErrorOccurred(String inErrorMessage) {
}
#Override
public void onTransactionResponse(Bundle inResponse) {
// Log.d(“LOG”, “Payment Transaction : ” + inResponse);
Log.d("LOG", "Payment Transaction : "+inResponse);
Toast.makeText(getApplicationContext(),"Payment Transaction Response" + inResponse.toString(), Toast.LENGTH_LONG).show();
}
#Override
public void networkNotAvailable() {
}
#Override
public void clientAuthenticationFailed(String inErrorMessage) {
}
#Override
public void onErrorLoadingWebPage(int iniErrorCode,
String inErrorMessage, String inFailingUrl) {
}
// had to be added: NOTE
#Override
public void onBackPressedCancelTransaction() {
// TODO Auto-generated method stub
}
#Override
public void onTransactionCancel(String inErrorMessage,
Bundle inResponse) {
Log.d("LOG", "Payment Transaction Failed" + inErrorMessage);
Toast.makeText(getBaseContext(),"Payment Transaction Failed", Toast.LENGTH_LONG).show();
}
});
}
class MyAsyncTask extends AsyncTask {
#Override
protected String doInBackground(Object[] params) {
URL url = null;
try {
url = new URL((String) params[0]);
} catch (MalformedURLException e) {
e.printStackTrace();
}
HttpURLConnection httpConn = null;
try {
httpConn = (HttpURLConnection) url.openConnection();
int responseCode = httpConn.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
InputStream is = httpConn.getInputStream();
BufferedReader reader = new BufferedReader(
new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
} catch (IOException e) {
e.printStackTrace();
} catch (Exception ex) {
ex.printStackTrace();
}
return null;
}
protected void onPostExecute(String result) {
super.onPostExecute(result);
try {
} catch (Exception e) {
}
Log.d("Response", result);
}
}
}
[enter image description here][2]
I just used the second code to test the trasaction. But i have to use the first posted code because i have to post the ORDERID and CALLBACKURL from android application to server . Any help would be appreciable.

**Here is the solution for all :**
Be sure to send equal number of parameters to your server (For checksum generator) And then to paytm server for payment.
**For example:**
If you are sending 6 params for checksum generator, then send these 6 same parameters including Checksum to Paytm...
It will resolve your problem.
**CODE EXAMPLE :**
**Generate checksum.php**
$paramList = array();
$paramList["MID"] = 'Provided by Paytm'; //Provided by Paytm
$paramList["ORDER_ID"] = 'hIquwhzvzTG7gvT'; //unique OrderId for every request
$paramList["CUST_ID"] = 'CUST0001453'; // unique customer identifier
$paramList["INDUSTRY_TYPE_ID"] = 'Retail'; //Provided by Paytm
$paramList["CHANNEL_ID"] = 'WAP'; //Provided by Paytm
$paramList["TXN_AMOUNT"] = '10.00'; // transaction amount
$paramList["WEBSITE"] = 'APP_STAGING';//Provided by Paytm
$paramList["CALLBACK_URL"] = 'https://pguat.paytm.com/paytmchecksum/paytmCallback.jsp';
**Android Activity.java**
paramMap.put("MID" , "#########");
paramMap.put( "ORDER_ID" , "hIquwhzvzTG7gvT");
paramMap.put( "CUST_ID" , "CUST0001453");
paramMap.put( "CHANNEL_ID" , "WAP");
paramMap.put( "TXN_AMOUNT" , "10.00");
paramMap.put( "WEBSITE" , "APP_STAGING");
paramMap.put( "CALLBACK_URL" , "https://pguat.paytm.com/paytmchecksum/paytmCallback.jsp");
paramMap.put( "CHECKSUMHASH" , "dR5OtEkuNkgamHTZDCHmF+CF3j9RdG1520mlHEb85oSZP1CaxVUsRY2sYric90HLm/vElaPZKoQ7b5/SyFpi3oBWXf2BQNy+r6iiBwg4AH4=");
paramMap.put("INDUSTRY_TYPE_ID" , "Retail");
**NOTE : Please keep in mind to send paytm server exact parameters plus one checksum.....**

Showing ProgressBar on parsing and downloading json result

In my App I am hitting a service which can have no result to n number of results(basically some barcodes). As of now I am using default circular progressbar when json is parsed and result is being saved in local DB(using sqlite). But if the json has large number of data it sometimes takes 30-45 min to parse and simultaneously saving that data in DB, which makes the interface unresponsive for that period of time and that makes user think the app has broken/hanged. For this problem I want to show a progressbar with the percentage stating how much data is parsed and saved so that user get to know the App is still working and not dead. I took help from this link but couldn't find how to achieve. Here's my Asynctask,
class BackGroundTasks extends AsyncTask<String, String, Void> {
private String operation, itemRef;
private ArrayList<Model_BarcodeDetail> changedBarcodeList, barcodeList;
private ArrayList<String> changeRefList;
String page;
public BackGroundTasks(String operation, String itemRef, String page) {
this.operation = operation;
this.itemRef = itemRef;
this.page = page;
}
#Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
if (dialog == null) {
dialog = ProgressDialog.show(mActivity, null,
"Please wait ...", true);
}
}
#Override
protected Void doInBackground(String... params) {
// TODO Auto-generated method stub
try{
if (!connection.HaveNetworkConnection()) {
dialog.dismiss();
connection.showToast(screenSize, "No Internet Connection.");
return null;
}
if (operation.equalsIgnoreCase("DownloadChangeItemRef")) {
changeRefList = DownloadChangeItemRef(params[1]);
if (changeRefList != null && !changeRefList.isEmpty()) {
RefList1.addAll(changeRefList);
}
}
if ((changeRefList != null && changeRefList.size() >0)) {
setUpdatedBarcodes(changedBarcodeList);
}
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
#SuppressLint("SimpleDateFormat")
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
}
}
ArrayList<String> DownloadChangeItemRef(String api_token) {
ArrayList<String> changedRefList = null;
HttpClient httpClient = new DefaultHttpClient();
HttpPost postRequest = new HttpPost(thoth_url + "/" + todaysDate
+ "?&return=json");
String url = thoth_url + "/" + todaysDate + "?&return=json";
String result = "";
try {
changedRefList = new ArrayList<String>();
ResponseHandler<String> responseHandler = new BasicResponseHandler();
result = httpClient.execute(postRequest, responseHandler);
JSONObject jsonObj = new JSONObject(result);
JSONArray jsonarray = jsonObj.getJSONArray("changes");
if (jsonarray.length() == 0) {
return null;
}
for (int i = 0; i < jsonarray.length(); i++) {
JSONObject obj = jsonarray.getJSONObject(i);
changedRefList.add(obj.getString("ref"));
}
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
// when there is no thoth url
Log.i("inclient: ", e.getMessage());
return null;
} catch (Exception e) {
// when there are no itemref
return null;
}
return changedRefList;
}
private boolean setUpdatedBarcodes(
final ArrayList<Model_BarcodeDetail> changedBarcodeList2) {
try {
BarcodeDatabase barcodeDatabase = new BarcodeDatabase(mActivity);
barcodeDatabase.open();
for (Model_BarcodeDetail model : changedBarcodeList2) {
barcodeDatabase.updateEntry(model, userId);
}
n++;
barcodeDatabase.close();
if (RefList1.equals(RefList)) {
if (dialog != null) {
dialog.dismiss();
}
connection.showToast(screenSize, "Barcodes updated successfully");
}
} catch (Exception e) {
Log.i("Exception caught in: ", "setDownloadedBarcodes method");
e.printStackTrace();
return false;
}
return true;
}

Android Http Credentials Login

Pictures of the link in the user name and password to login. Because the Json need to read the data. It is with Android, how do I do that ?
#Override protected String doInBackground(String... urls) {
return GET(urls[0]);
}
#Override protected void onPostExecute(String result) {
if(result == null) {
progress.show();
Log.i("Arduino Server ", "[ Server Bağlantısı Kuruluyor ]");
} else {
progress.dismiss();
Log.i("Arduino Server ", "[ Server Bağlantısı Kuruldu ]");
}
try {
JSONObject json = new JSONObject(result);
outlet10 = json.getString("outlet10").toString();
outlet11 = json.getString("outlet11").toString();
outlet12 = json.getString("outlet12").toString();
outlet13 = json.getString("outlet13").toString();
outlet14 = json.getString("outlet14").toString();
outlet15 = json.getString("outlet15").toString();
if (outlet10.equals("on")) { Switch1.setChecked(true); }else{ Switch1.setChecked(false); }
if (outlet11.equals("on")) { Switch2.setChecked(true); }else{ Switch2.setChecked(false); }
if (outlet12.equals("on")) { Switch3.setChecked(true); }else{ Switch3.setChecked(false); }
if (outlet13.equals("on")) { Switch4.setChecked(true); }else{ Switch4.setChecked(false); }
if (outlet14.equals("on")) { Switch5.setChecked(true); }else{ Switch5.setChecked(false); }
if (outlet15.equals("on")) { Switch6.setChecked(true); }else{ Switch6.setChecked(false); }
} catch (JSONException e) {
e.printStackTrace();
}
Log.i("Json Durumlar ", "Alındı...");
}
}

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Showing loading for a UI freezing async task like this one

I have an Async task class which gets the name of a web method and run it and I have to wait for the result of that web method, so I used task.execute.get() method which is freezing my UI. the problem is that I want to show a loading dialog when task is executing but when I'm trying to call this method 10 times for 10 web methods, the UI freezes and after executing 10 web methods, loading dialog appears for 1 second.
What can I do to show loading without moving all of my codes into doInBackground? I want to have a class which gets web method info and returns the result. this is my class code:
public class AsyncCallWs extends AsyncTask<String, Void, String> {
private ProgressDialog dialog;
public String methodName="";
private WebService ws;
private ArrayList<ServiceParam> paramsList;
private boolean hasParams;
public AsyncCallWs(Activity activity,String methodName) {
xLog.position();
try {
this.dialog = new ProgressDialog(activity);
this.methodName = methodName;
hasParams = false;
} catch (Exception e) {
xLog.error(e.getMessage());
}
}
public AsyncCallWs(Activity activity,String methodName,ArrayList<ServiceParam> params) {
xLog.position();
try {
this.dialog = new ProgressDialog(activity);
this.methodName = methodName;
this.paramsList = params;
hasParams = true;
} catch (Exception e) {
xLog.error(e.getMessage());
}
}
#Override
protected void onPreExecute() {
this.dialog.setMessage(PersianReshape.reshape("Loading..."));
this.dialog.show();
}
#Override
protected String doInBackground(String... params) {
xLog.position();
String result = "No async task result!";
try {
ws = new WebService(PublicVariable.NAMESPACE, PublicVariable.URL);
if (!hasParams){
result = ws.CallMethod(methodName);
}
else{
xLog.info("THIS METHOD IS: "+ methodName);
result = ws.CallMethod(methodName,paramsList);
xLog.info("THIS RESULT IS: "+ result);
}
} catch (Exception e) {
xLog.error(e.getMessage());
}
return result;
}
#Override
protected void onPostExecute(String result) {
xLog.position();
if (this.dialog.isShowing()) {
this.dialog.dismiss();
}
xLog.info("Output of current AsyncTask is:"+ result);
}
}
And this is the way I'm calling web methods using this class:
public void doSync(String method){
xLog.position();
AsyncCallWs t;
ArrayList<ServiceParam> serviceParams = new ArrayList<ServiceParam>();
String result="";
Settings settings = new Settings(activity);
PublicVariable.pGuid = Login(settings.getValue("Username"), settings.getValue("Password"));
xLog.info("pGuid in doSync is:" + PublicVariable.pGuid);
serviceParams.add(new ServiceParam("pGuid", PublicVariable.pGuid, String.class));
if (method=="all" || method=="person"){
try {
t = new AsyncCallWs(activity,"GetPersonInfo",serviceParams);
result = t.execute().get();
xLog.info("Sync Person=>"+ result);
String fields[] = result.split(PublicVariable.FIELD_SPLITTER);
Person person = new Person(activity,fields);
person.empty();
person.insert();
settings.update("PersonId",String.valueOf(person.getId()));
PublicVariable.personId = person.getId();
xLog.info("Person inserted...");
} catch (Exception e) {
xLog.error(e.getMessage());
}
}
}
if (method=="all" || method=="personImage"){
try {
t = new AsyncCallWs(activity,"GetPersonImage",serviceParams);
result = t.execute().get();
if (!result.equals("Nothing")){
settings.update("picture", result);
xLog.info("Picture updatted...");
}
else
xLog.error("NO PERSON IMAGE FOUND!");
} catch (Exception e) {
xLog.error(e.getMessage());
}
}
if (method=="all" || method=="lawyers"){
try {
t = new AsyncCallWs(activity,"GetLawyers",serviceParams);
result = t.execute().get();
xLog.info("Sync Lawyer=>"+ result);
if (!result.equals("Nothing")){
String records[] = result.split(PublicVariable.RECORD_SPLITTER);
String fields[];
Lawyer lawyer= new Lawyer(activity);
lawyer.empty();
for(int i=0;i<records.length;i++){
fields = records[i].split(PublicVariable.FIELD_SPLITTER);
lawyer = new Lawyer(activity, fields);
lawyer.insert();
}
xLog.info("Lawyers inserted...");
}
else
xLog.error("NO LAWYER FOUND!");
}catch (Exception e) {
xLog.error(e.getMessage());
}
}
if (method=="all" || method=="news"){
try {
t = new AsyncCallWs(activity,"GetNews",serviceParams);
result = t.execute().get();
String fields[];
Log.d("Ehsan","Sync News=>"+ result);
if (!result.equals("Nothing")){
String records[] = result.split(PublicVariable.RECORD_SPLITTER);
News news = new News(activity);
news.empty();
for(int i=0;i<records.length;i++){
fields = records[i].split(PublicVariable.FIELD_SPLITTER);
news= new News(activity,fields);
news.insert();
}
xLog.info("News inserted...");
}
else
xLog.error("NO NEWS FOUND!");
} catch (Exception e) {
xLog.error(e.getMessage());
}
}
if (method=="all" || method=="messages"){
try {
t = new AsyncCallWs(activity,"GetMessagesInbox ",serviceParams);
result = t.execute().get();
Log.d("Ehsan","Sync message Inbox=>"+ result);
if (!result.equals("Nothing")){
String records[] = result.split(PublicVariable.RECORD_SPLITTER);
String fields[];
Message message = new Message(activity);
message.empty();
for(int i=0;i<records.length;i++){
fields = records[i].split(PublicVariable.FIELD_SPLITTER);
message= new Message(activity,fields);
message.insert();
}
xLog.info("Inbox messages inserted...");
}
else
xLog.error("NO MESSAGES FOUND!");
} catch (Exception e) {
xLog.error(e.getMessage());
}
try {
t = new AsyncCallWs(activity,"GetMessagesOutbox ",serviceParams);
result = t.execute().get();
Log.d("Ehsan","Sync message Outbox=>"+ result);
if (!result.equals("Nothing")){
String records[] = result.split(PublicVariable.RECORD_SPLITTER);
String fields[];
Message message = new Message(activity);
message.empty();
for(int i=0;i<records.length;i++){
fields = records[i].split(PublicVariable.FIELD_SPLITTER);
message= new Message(activity,fields);
message.insert();
}
xLog.info("Outbox messages inserted...");
}
else
xLog.error("NO MESSAGES FOUND!");
} catch (Exception e) {
xLog.error(e.getMessage());
}
}
if (method=="all" || method=="requests"){
try {
t = new AsyncCallWs(activity,"GetAllRequests",serviceParams);
result = t.execute().get();
Log.d("Ehsan","Sync share buy sell requests=>"+ result);
if (!result.equals("Nothing")){
String records[] = result.split(PublicVariable.RECORD_SPLITTER);
String fields[];
Share share = new Share(activity);
share.empty();
for(int i=0;i<records.length;i++){
fields = records[i].split(PublicVariable.FIELD_SPLITTER);
share= new Share(activity,fields);
share.insert();
}
xLog.info("Shares inserted...");
}
else
xLog.error("NO MESSAGES FOUND!");
} catch (Exception e) {
xLog.error(e.getMessage());
}
}
if (method=="all" || method=="financials"){
try {
t = new AsyncCallWs(activity,"GetFinancials",serviceParams);
result = t.execute().get();
Log.d("Ehsan","Sync Financials=>"+ result);
if (!result.equals("Nothing")){
String records[] = result.split(PublicVariable.RECORD_SPLITTER);
String fields[];
Financial financial = new Financial(activity);
financial.empty();
for(int i=0;i<records.length;i++){
fields = records[i].split(PublicVariable.FIELD_SPLITTER);
financial= new Financial(activity,fields);
financial.insert();
}
xLog.info("Financials inserted...");
}
else{
Log.e("Ehsan", "NOT FINANCIALS FOUND!");
}
} catch (Exception e) {
xLog.error(e.getMessage());
}
}
}

Here
result = t.execute().get(); //<<< calling get method
as in doc AsyncTask.get() :
Waits if necessary for the computation to complete, and then retrieves
its result.
so to avoid freezing of Main UI Thread during execution of doInBackground start AsyncTask without calling get method as|:
t.execute();
I want to have a class which gets web method info and returns the
result
For this you should implement callback with AsyncTask which report to Activity. see following examples :
android asynctask sending callbacks to ui
How to implement callback with AsyncTask

Android: AsyncTask and reading internet data

I have written a code to download some data from internet. Than i wanted to put it into asyncTask. And after that downloading stopped working. It looks like it cant finish try{} part so skips to exeption.
From main activity "Nekaj" i call loadData() class, which extends AsyncData. From there i call "oto" class inside try command. "oto" class is used to read stuff from internet and returns array of strings. This worked when i called oto class directly from "Nekaj"class. What did I do wrong with using AsyncTask?
Here is the code:
public class Nekaj extends Activity {
TextView Tkolo, Tbroj1;
String[] brojevi_varijabla;
String privremena_varijabla = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.bez_provjere_739);
Tkolo = (TextView) findViewById(R.id.Xkolo);
Tbroj1 = (TextView) findViewById(R.id.Xbroj1);
/*
* try { privremena_varijabla = test.kolo_739();
* Tkolo.setText(privremena_varijabla); } catch (Exception e) { // TODO
* Auto-generated catch block e.printStackTrace(); }
*/
new loadData().execute();
}
public class loadData extends AsyncTask<String, Integer, String> {
#Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
Oto test = new Oto();
try {
brojevi_varijabla = test.brojevi_739();
if (Integer.valueOf(brojevi_varijabla[0]) > 10) {
Tbroj1.setText("" + brojevi_varijabla[0]);
} else {
Tbroj1.setText(" " + brojevi_varijabla[0]);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}
public class Oto {
public String[] brojevi_739() throws Exception {
int i = 0;
int uvjet = 0;
int varijabla = 0;
char[] znak = { '>', '<' };
BufferedReader in = null;
String data[] = null;
String provjera = "date-info";
int[] polje = new int[2];
try {
HttpClient klijent = new DefaultHttpClient();
URI webstranica = new URI(
"https://www.aaa.bb");
HttpGet zahtjev = new HttpGet();
zahtjev.setURI(webstranica);
HttpResponse odgovor = klijent.execute(zahtjev);
in = new BufferedReader(new InputStreamReader(odgovor
.getEntity().getContent()));
StringBuffer brojevi = new StringBuffer("");
String brojevi_string = null;
String neki_string = null;
String red = "";
in.skip(21000);
while ((red = in.readLine()) != null) {
varijabla = red.indexOf(provjera);
if (varijabla != -1) {
// 1. KOLO
if (uvjet == 0) { // onda sadrži taj
// substring
// !!!!
red = in.readLine(); // sada string red sadrži ono
// što
// želim, još moram samo to
// izrezati!!
do {
if (i == 0) {
varijabla = red.indexOf(znak[i]);
}
else {
varijabla = red.indexOf(znak[i], polje[0]);
}
if (varijabla != -1) // ako taj znak postoji u
// stringu
{
if (i == 0) {
polje[i] = varijabla + 1;
}
else {
polje[i] = varijabla;
}
i++;
}
} while (i <= 1);
neki_string = red.substring(polje[0], polje[1]);
Tkolo.setText(neki_string);
provjera = "Dobitna kombinacija";
uvjet++;
continue;
}
}
}
in.close();
brojevi_string = brojevi.toString();
data = brojevi_string.split("\n");
return data;
} finally {
if (in != null) {
try {
in.close();
return data;
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}}

What you are doing wrong is Tbroj1.setText() inside the doInBackground() method. What you have to do is to use the onPostExecute method to post your data on the UI:
public class loadData extends AsyncTask<String, Integer, Boolean> {
protected Long doInBackground(String... arg0) {
Oto test = new Oto();
Boolean result = false;
try {
brojevi_varijabla = test.brojevi_739();
result = true;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return result;
}
protected void onPostExecute(Boolean result) {
if(result){
if (Integer.valueOf(brojevi_varijabla[0]) > 10) {
Tbroj1.setText("" + brojevi_varijabla[0]);
} else {
Tbroj1.setText(" " + brojevi_varijabla[0]);
}
}
}
}

Actually, You are trying to update UI in doInBackGround() of your AsyncTask, so its not allowed (doInBack.. runs in non UI Thread..), So put the UI updation code in onPostExecute() of AsyncTask..
Try this and let me know what happen..
public class loadData extends AsyncTask<String, Integer, String> {
#Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
Oto test = new Oto();
try {
brojevi_varijabla = test.brojevi_739();
if(brojevi_varijabla != null)
return brojevi_varijabla[0];
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result)
{
if(result != null)
{
if (Integer.valueOf(result) > 10) {
Tbroj1.setText("" + result;
} else {
Tbroj1.setText(" " + result);
}
}
}
}

use onPostExecute(Void result1) {}
to catch the result and perform the action required over there

You can't manipulate UI elements directly on a non-UI (background) thread, which is where doInBackground() always runs. The usual way of using AsyncTask is to get the data in doInBackground(), return it as a value, and then process the UI changes in onPostExecute(). For example:
public class loadData extends AsyncTask<String, Integer, String> {
#Override
protected String doInBackground(String... arg0) {
Oto test = new Oto();
try {
brojevi_varijabla = test.brojevi_739();
if (Integer.valueOf(brojevi_varijabla[0]) > 10) {
return "" + brojevi_varijabla[0];
} else {
return " " + brojevi_varijabla[0];
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if (result != null) Tbroj1.setText(result);
}
}

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Return ArrayList from async task - android

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