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doInBackground not updating variable

I'm working on a basic android app that makes a POST with HttpURLConnection. I want to return the response Message from my Web API.
My MainActivity.java
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final TextView mTextView = findViewById(R.id.textView);
AsyncExample asyncExample = new AsyncExample();
asyncExample.execute();
mTextView.setText(asyncExample.getResponseMsg());
}
}
My AsyncExample.java
class AsyncExample extends AsyncTask<Void, Void, Void> {
private HttpURLConnection con;
private String responseMsg;
protected void onPreExecute() {
responseMsg = "empty message";
}
#Override
protected Void doInBackground(Void... params) {
String urlParameters = "param1=data1";
byte[] postData = urlParameters.getBytes(Charset.forName("UTF-8"));
int postDataLength = postData.length;
String request = "http://192.168.1.30:6262";
URL url = null;
try {
url = new URL(request);
con = (HttpURLConnection) url.openConnection();
con.setDoOutput(true);
con.setInstanceFollowRedirects(false);
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
con.setRequestProperty("charset", "utf-8");
con.setRequestProperty("Content-Length", Integer.toString(postDataLength));
responseMsg = con.getResponseMessage();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
public String getResponseMsg() {
return responseMsg;
}
}
After running the app, i get empty message in my TextView. Why it is not getting updated my doInBackground? Even if con.getResponseMessage() is null, it should be updated?

The problem is that your AsyncTask is executed asynchronously, while you try to retrieve the value immediately. You need to implement this a little bit differently. Either leverage the API of AsyncTask, sine it posts callbacks for your on the UI thread. You can update your TextView directly in your AsyncTask
class MyAwesomeAsyncTask extends AsyncTask<Void, Void, String> {
#Override
protected void onPreExecute() {
myTextView.setText("progress started");
}
#Override
protected String doInBackground(final Void... voids) {
String s = amazingCallToBackend();
return s;
}
#Override
protected void onPostExecute(final String s) {
myTextView.setText(s);
}
}
Or if you just want the value, you can pass a Callback to your async task that will deliver the value to you, something like that
interface Callback {
void onValueReceived(String value);
void onFailure();
}
class MyAwesomeAsyncTask extends AsyncTask<Void, Void, String> {
private Callback callback;
MyAwesomeAsyncTask(final Callback callback) {
this.callback = callback;
}
#Override
protected String doInBackground(final Void... voids) {
String s = amazingCallToBackend();
return s;
}
#Override
protected void onPostExecute(final String s) {
callback.onValueReceived(s);
}
}
Here's how you create it
Callback callback = new Callback() {
#Override
public void onValueReceived(final String value) {
}
#Override
public void onFailure() {
}
};
new MyAwesomeAsyncTask(callback).execute();
However, be careful because if for some reason your activity/fragment is gone/finished before your AsyncTask is done, this can cause memory leaks.
A quick Google search will tell you all you want about AsyncTask leaking memory :)

Your doInBackground method take time to execute. you are immediately calling mTextView.setText(asyncExample.getResponseMsg()); but asynctask has been not been finished yet. You need to wait until your doInBackground finish and then call that setText you can do it in onPostExecute method.

AsyncTask has 3 default method
1. On preexecute
2. Do in background
3. On post execute
post execute:
The response got from the doinbackground is in the post execute.
Here we can process the result . use the runnable method to update text view ui

Override the onPostExecute() Method to return the text. In the Main Activity create a method to update the TextView after completing the execution of the Async Task. It is coming blank as because the Main Thread is not paused its executing and setting the text View but the Async task has not yet finished executing and hence the String is empty. So wait for the Async Task to finish before setting the text view.
String str_result= new RunInBackGround().execute().get();
Refer to this for more information.

You can do it in a number of ways. I'd try to suggest you a way that would require negligible amount of changes to your existing code.
Declare the mTextView as a Global variable, Override onPostExecute() method inside your AsyncExample and update mTextView inside that onPostExecute() method with the value passed to it by the doInBackground() method [here, notice that responseMsg is returned at the end of doInBackground() ground which is caught as a String value (result) by the onPostExecute() method]. However, I also think that its a good idea to Override your onPreExecute() method.
In order to do so, your MainActivity.java should be as follows:
public class MainActivity extends AppCompatActivity {
TextView mTextView; //declare mTextView outside the onCreate() method as a Global String variable.
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = findViewById(R.id.textView);
AsyncExample asyncExample = new AsyncExample();
asyncExample.execute();
}
}
Please make your asynctask an inner-class of the same activity and edit it as follows:
class AsyncExample extends AsyncTask<Void, Void, Void> {
private HttpURLConnection con;
private String responseMsg;
#Override // Its a good practice to Override the onPreExecute() method.
protected void onPreExecute() {
responseMsg = "empty message";
}
#Override
protected String doInBackground(String... params) {
String urlParameters = "param1=data1";
byte[] postData = urlParameters.getBytes(Charset.forName("UTF-8"));
int postDataLength = postData.length;
String request = "http://192.168.1.30:6262";
URL url = null;
try {
url = new URL(request);
con = (HttpURLConnection) url.openConnection();
con.setDoOutput(true);
con.setInstanceFollowRedirects(false);
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
con.setRequestProperty("charset", "utf-8");
con.setRequestProperty("Content-Length", Integer.toString(postDataLength));
responseMsg = con.getResponseMessage();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return responseMsg; //return the value of responseMsg
}
#Override //override onPostExecute() method
protected void onPostExecute(String result) { //receive the value to be set to mTextView which is returned by the doInBackground() method.
mTextView.setText(result);
}
}

Try to do like this
MainActivity
public class MainActivity extends AppCompatActivity {
TextView mTextView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = findViewById(R.id.textView);
AsyncExample asyncExample = new AsyncExample(this,mTextView);
asyncExample.execute();
}
}
AsyncTask
class AsyncExample extends AsyncTask<Void, Void, Void> {
private HttpURLConnection con;
private String responseMsg;
private MainActivity mContext;
TextView mTextView;
public AsyncExample (MainActivity context, TextView textView) {
mContext = context;
mTextView = textView;
}
protected void onPreExecute() {
responseMsg = "empty message";
}
#RequiresApi(api = Build.VERSION_CODES.KITKAT)
#Override
protected Void doInBackground(Void... params) {
String urlParameters = "param1=data1";
byte[] postData = urlParameters.getBytes(StandardCharsets.UTF_8);
int postDataLength = postData.length;
String request = "http://192.168.1.30:6262";
URL url = null;
try {
url = new URL(request);
con = (HttpURLConnection) url.openConnection();
con.setDoOutput(true);
con.setInstanceFollowRedirects(false);
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
con.setRequestProperty("charset", "utf-8");
con.setRequestProperty("Content-Length", Integer.toString(postDataLength));
responseMsg = con.getResponseMessage();
mContext.runOnUiThread(new Runnable() {
#Override
public void run() {
mTextView.setText(responseMsg);
}
});
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
public String getResponseMsg() {
return responseMsg;
}
}

Access a private field from MainActivity Class to another Class

I have declared a private field in the MainActivity Class with getter and setter method. Now I want to setText from another class in this field. But after running the device the app is crushing. I want to fetch some json data by using this code. I am not getting how to call this field from another class and how to set the value to run the app smoothly. My code looks like this.
public class MainActivity extends AppCompatActivity {
private TextView tvData;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btnHit=(Button)findViewById(R.id.btnHit);
tvData=(TextView)findViewById(R.id.tvJsonItem);
btnHit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
JSONTask jsonTask=new JSONTask("https://jsonparsingdemo-cec5b.firebaseapp.com/jsonData/moviesDemoItem.txt"); //error showing this cannot be applied
jsonTask.execute();
}
});
}
The another class is
public class JSONTask extends AsyncTask<String,String,String>{
private TextView tvData;
public JSONTask(TextView tvData) {
this.tvData =tvData;
}
#Override
protected String doInBackground(String... params) {
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
URL url = new URL(params[0]);
connection = (HttpURLConnection) url.openConnection();
connection.connect();
InputStream stream = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
StringBuffer buffer = new StringBuffer();
String line = "";
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
return buffer.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.disconnect();
}
try {
if (reader != null) {
reader.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
#Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
tvData.setText(result);
}
}

Make your AsyncTask like this:
class JSONTask extends AsyncTask<String ,String,String>{
private TextView textView;
public JSONTask(TextView textView) {
this.textView = textView;
}
#Override
protected String doInBackground(String... params) {
return null;
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
textView.setText(s);
}
}
now call this class from MainActivity
JSONTask jsonTask = new JSONTask(yourTextView);
jsonTask.execute();

Hope it will work for you .
#override
protected void onPostExecute(String result){
super.onPostExecute(result);
new MainActivity().setTvData().setText(result);
Use setTvData().setText() to set the value if you only one data in your json string .

use result of doInBackground to set a textView

I'm new to Android and I was trying to communicate with my localhost using php script and accessing a simple database.
I have defined a task in the doInBackground() method which takes a value from the database stored on the localhost(I don't know if that part will work).
I want to set the text in the textview of an activity using the result that the doInBackground Method returns.
public class BackgroundWorker extends AsyncTask<String,Void,String> {
Context context;
BackgroundWorker(Context ctx)
{
context = ctx;
}
#Override
protected String doInBackground(String... params) {
String group = params[0];
String child = params[1];
String address = "http://10.0.2.2/conn.php";
URL url = null;
try {
url = new URL(address);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
OutputStream outputStream = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
String post_data = URLEncoder.encode("group", "UTF-8") + "=" + URLEncoder.encode(group, "UTF-8") + "&"
+ URLEncoder.encode("child", "UTF-8") + "=" + URLEncoder.encode(child, "UTF-8");
bufferedWriter.write(post_data);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1"));
String result = "";
String line;
while ((line = bufferedReader.readLine()) != null) {
result += line;
}
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
return result;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
}
#Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}
And the Activity class:
public class viewTT extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_view_tt);
Button btnNextScreen = (Button) findViewById(R.id.button);
TextView txtName = (TextView) findViewById(R.id.textView);
TextView txtName2 = (TextView) findViewById(R.id.textView2);
Intent i = getIntent();
// Receiving the Data
String group= i.getStringExtra("group");
String child = i.getStringExtra("child");
txtName.setText(group+" "+child);
BackgroundWorker backgroundWorker = new BackgroundWorker(this);
backgroundWorker.execute(group,child);
btnNextScreen.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0)
{
//Starting a new Intent
Intent nextScreen = new Intent(getApplicationContext(), MainActivity.class);
startActivity(nextScreen);
}
});
}
}
I want to set txtName2.

You can use a interface to return data to your activity
Interface
public interface AsyncResponse {
public void onFinish(Object output);
}
SomeAsyncTask Class
public class SomeAsyncTask extends AsyncTask<String, String, String> {
private AsyncResponse asyncResponse;
public SomeAsyncTask(AsyncResponse asyncResponse) {
this.asyncResponse = asyncResponse;
}
#Override
protected String doInBackground(String... params) {
//Do something
.....
//Finally return something
return "returnSomeString";
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
asyncResponse.onFinish(s);
}}
In your activity where you want to set view call the SomeAsyncTask class like this
SomeAsyncTask someAsyncTask=new SomeAsyncTask(new AsyncResponse() {
#Override
public void onFinish(Object output) {
String result= (String) output;
//Finally set your views
}
});
someAsyncTask.execute();
}

Define an interface to take result of backgroundworker and make workers constructor to take second parameter that interface.call that interface object on post execute and put your result as parameter. than use it like:
BackgroundWorker backgroundWorker = new BackgroundWorker(this, new bgWorkerListener() {
#Override
public void onResult(String s) {
txtname2.settext(s);
}
});
backgroundWorker.execute(group, child);

Here is your string in main Thread
protected void onPostExecute(String s) {
// s is your string
super.onPostExecute(s);
}
in your BackgroundWorker class add this code...
private String textFortxtName2;
public String getTextFortxtName2() {
return textFortxtName2;
}
public void setTextFortxtName2(String textFortxtName2) {
this.textFortxtName2 = textFortxtName2;
}
then add this
protected void onPostExecute(String s) {
// s is your string
textFortxtName2 = s;
super.onPostExecute(s);
}
now you can get the text frome yor main activity,,,
...
BackgroundWorker backgroundWorker = new BackgroundWorker(this);
backgroundWorker.execute(group,child);
txtName2.setText(backgroundWorker.getTextFortxtName2());
that's all :)
if there will be any questions or bags please coment

how to return string from AsyncTask to another activity

I have created a class and extend with AsyncTask , now i want to return me a string to another activity throw this class . its getting jsonstring from mysql mDatabase
enter code here
public class GetJson extends AsyncTask<Void,Void,String> {
String JSON_STRING;
String json_url;
public String pasString;
Activity ab;
#Override
protected void onPreExecute() {
json_url="https://XXXXXXX.000webhostapp.com/Json_getData_Survey.php";
}
public GetJson(Activity b) {
ab=b;
}
#Override
protected String doInBackground(Void... params) {
try {
URL url =new URL(json_url);
HttpURLConnection httpURLConnection =(HttpURLConnection) url.openConnection();
InputStream inputStream =httpURLConnection.getInputStream();
BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(inputStream));
StringBuilder stringBuilder=new StringBuilder();
while ((JSON_STRING=bufferedReader.readLine())!=null)
{
stringBuilder.append(JSON_STRING+"\n");
}
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
String strings =stringBuilder.toString().trim();
return strings;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
#Override
protected void onPostExecute(String result) {
pasString=result;
// Toast.makeText(ab,pasString,Toast.LENGTH_LONG).show();
// json_string1=result;
}
}
i just need to return string1 to my another Activity , i have creaetd a another mehtod in GetJson class to return this string but when i display this it show nothing in it. please help

its Quite simple
make an interface class as following
public interface ResponseListener() {
void onResponseReceive(String data);
}
and add instance of this class in you GetJson class like this
public class GetJson extends AsyncTask<Void,Void,String> {
String JSON_STRING;
String json_url;
public String pasString;
Activity ab;
// this is new code
ResponseListener listener;
public void setOnResponseListener(ResponseListener listener) {
this.listener = listener;
}
#Override
protected void onPreExecute() {
json_url="https://XXXXXXX.000webhostapp.com/Json_getData_Survey.php";
}
// now add this code in onPost function
#Override
protected void onPostExecute(String result) {
pasString=result;
listener.onResponseReceive(pasString);
// Toast.makeText(ab,pasString,Toast.LENGTH_LONG).show();
// json_string1=result;
}
now when you call GetJson from your activity, just simple do that;
GetJson json = new GetJson(Activity.this);
json.setOnResponseListener(new ResponseListener() {
#Override
public void onResponseReceived(String data) {
// here you will get your response
}
});
hope you will understand. :)

Try using activity results. You can set the return value on the one activity, and get it when that activity terminates.
https://developer.android.com/training/basics/intents/result.html

Use HttpClient for login authentication

I am trying to send a POST request to a php file and when the user is asked for login information, if wrong, it prints the json message from the php file and if right, it allows user to login. However, my application crashes, giving a NetworkOnThreadMainException pointing errors to three lines.
HttpResponse response=httpClient.execute(httpPost);
public class LoginActivity extends ActionBarActivity {
login();
So how can i make this possible?
This is some part of the code I have written:
public class LoginActivity extends ActionBarActivity {
EditText et, et2;
ImageButton ib5;
String name,pwd;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
et = (EditText) findViewById(R.id.editText);
et2 = (EditText) findViewById(R.id.editText2);
ib5 = (ImageButton) findViewById(R.id.imageButton5);
name=et.getText().toString();
pwd=et2.getText().toString();
final LoginActivity loginActivity=null;
ib5.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//login();
new DownloadFilesTask(loginActivity,name,pwd).doInBackground();
}
});
}
public void login() {
new LoginTask(this, et.getText().toString(), et2.getText().toString());
}
private class LoginTask {
public LoginTask(LoginActivity loginActivity, String name, String pwd) {
}
}
void navigatetoMainActivity() {
Intent homeIntent = new Intent(getApplicationContext(), MainActivity.class);
homeIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(homeIntent);
}
void InvalidToast(){
Toast.makeText(getApplicationContext(), "Please enter valid name and password", Toast.LENGTH_LONG).show();
}
void EmptyToast(){
Toast.makeText(getApplicationContext(), "Please fill the form, don't leave any field blank", Toast.LENGTH_LONG).show();
}
}
DownloadFilesTask.java
public class DownloadFilesTask extends AsyncTask<String, String, String> {
private String name, pwd;
private LoginActivity loginActivity;
public DownloadFilesTask(LoginActivity loginActivity,String name, String pwd){
this.loginActivity=loginActivity;
this.name=name;
this.pwd=pwd;
}
#Override
protected String doInBackground(String... strings) {
HttpClient httpClient=new DefaultHttpClient();
HttpPost httpPost=new HttpPost("login.php");
List<NameValuePair> nameValuePairs=new ArrayList<NameValuePair>(2);
String result=null;
nameValuePairs.add(new BasicNameValuePair("name", name));
nameValuePairs.add(new BasicNameValuePair("password", pwd));
try {
httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
HttpResponse response= null;
try {
response = httpClient.execute(httpPost); //error is given here
} catch (IOException e) {
e.printStackTrace();
}
HttpEntity entity=response.getEntity();
InputStream instream= null;
try {
instream = entity.getContent();
} catch (IOException e) {
e.printStackTrace();
}
result=convertStreamToString(instream);
try {
instream.close();
} catch (IOException e) {
e.printStackTrace();
}
if (Utility.isNotNull(name) && Utility.isNotNull(pwd)) {
RequestParams params = new RequestParams();
if (Utility.validate(name, pwd)) {
params.put("username", name);
params.put("password", pwd);
onPostExecute();
} else {
loginActivity.InvalidToast();
}
} else {
loginActivity.EmptyToast();
}
return result;
}
private String convertStreamToString(InputStream instream) {
BufferedReader reader=new BufferedReader(new InputStreamReader(instream));
StringBuilder sb=new StringBuilder();
String line=null;
try {
while ((line=reader.readLine())!=null){
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
}finally{
try {
instream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
protected void onPostExecute(){
loginActivity.navigatetoMainActivity();
}
private static class Utility {
static Pattern pattern;
static Matcher matcher;
static Pattern pattern1;
static Matcher matcher1;
static String NAME_PATTERN="SuperBoise";
static String PWD_PATTERN="qwerty";
public static boolean validate(String name,String pwd){
pattern=Pattern.compile(NAME_PATTERN);
pattern1=Pattern.compile(PWD_PATTERN);
matcher=pattern.matcher(name);
matcher1=pattern1.matcher(pwd);
return matcher.matches()&& matcher1.matches();
}
public static boolean isNotNull(String name) {
return name!=null && name.trim().length()>0 ? true: false;
}
}
}

Your application has 1 main thread running all the time when it is not paused which is called the UI Thread.
As of the latest versions of Android, you are not permitted to make any network related actions on the UI Thread because it is time-consuming and it blocks the main thread which is responsible for drawing all the UI and registering the clicks, etc. (there is a way to bypass this but it is HIGHLY NOT RECOMMENDED)
An easy way to perform network related actions such as logging in, is the AsyncTask class implemented by Android.
The class runs on a very simple principle, it has 2 methods which run on the UI Thread: the onPreExecute() and the onPostExecute() methods.
And it has a method that runs on a Background Thread which is called the doInBackground() (this is where you should do all your network related actions
Here is a very basic example of an AsyncTask class:
public class DownloadFilesTask extends AsyncTask<void, void, void> {
public DownloadFilesTask(){
// Here you can pass data to the task
// if you want to pass more than 1 type of data
}
protected void onPreExecute(){
// this is executed on the UI Thread
// so you can modify elements inside the UI Thread
// this is called after execute() is called and
// before doInBackground() is called
}
protected void doInBackground(Void... params) {
//here you do all your network related stuff
return null;
}
protected void onPostExecute(Void result) {
// here you can work on the UI Thread
// this is executed after the AsyncTask's execute() is finished
// (after doInBackground() is done)
}
}
And to use this task you can just simply call it from the UI Thread like this:
new DownloadFilesTask().execute();
This is the AsyncTask documentation page on the developer.android.com: AsyncTask
You could pass a reference to your LoginActivity through the constructor of the task and if the login is valid then you can call the navigatetoMainActivity() method from your onPostExecute() inside the task
Edit1: How your LoginActivity should look:
public class LoginActivity extends ActionBarActivity {
EditText et, et2;
ImageButton ib5;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
et = (EditText) findViewById(R.id.editText);
et2 = (EditText) findViewById(R.id.editText2);
ib5 = (ImageButton) findViewById(R.id.imageButton5);
ib5.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
login();
}
});
}
public void login(){
new LoginTask(this, et.getText().toString(), et2.getText.toString()).execute();
}
}
Edit2: This is how your task should look like:
public class LoginTask extends AsyncTask<void , void, void> {
private String user, password;
private LoginActivity loginActivity;
public LoginTask(LoginActivity loginActivity, String user, String password){
this.loginActivity = loginActivity;
this.user = user;
this.password = password;
}
#Override
protected String doInBackground(Void... params) {
//do all the networking here
}
protected void onPostExecute(Void results){
super.onPostExecute(results);
loginActivity.navigatetoMainActivity();
}
}