I'm trying to write an app that sends a POST
request on asynchronous task. My AsyncTask
does not seem to execute since my progress bar doesn't show up. I don't really know what is wrong here, since I followed many solutions/tutorials.
Here's my code:
register.java
public class register extends AppCompatActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.register);
ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
actionBar.setHomeButtonEnabled(true);
final Activity thisActivity = this;
final EditText userNameEditText = findViewById(R.id.registerUsername);
final EditText emailEditText = findViewById(R.id.registerEmail);
final EditText passwordEditText = findViewById(R.id.registerPassword);
final ProgressBar progressBar = findViewById(R.id.progressBar);
Button btnRegisterDB = findViewById(R.id.btnRegistrationDB);
final TextView respondText = findViewById(R.id.responseRegister);
btnRegisterDB.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String username = String.valueOf(userNameEditText.getText());
String email = String.valueOf(emailEditText.getText());
String password = String.valueOf(passwordEditText.getText());
//execute asynchronous task in background and wait for response
RegisterParams params = new RegisterParams(username, email, password);
registrationDB async = new registrationDB();
async.setProgressBar(progressBar);
async.setRespondText(respondText);
async.getParentActivity(thisActivity);
async.execute(params);
}
});
}
public boolean onOptionsItemSelected(MenuItem item){
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
startActivity(intent);
return true;
}
public static class RegisterParams {
public String username;
public String email;
public String password;
RegisterParams(String username, String email, String password){
this.username = username;
this.email = email;
this.password = password;
}
}
}
and here is registrationDB.java
public class registrationDB extends AsyncTask<register.RegisterParams, Void, String> {
openHTTP openHTTP = new openHTTP();
String respond;
ProgressBar pb;
TextView respondTextView;
Activity parentActivity;
public void setProgressBar(ProgressBar progressBar){
this.pb = progressBar;
}
public void setRespondText(TextView textView){
this.respondTextView = textView;
}
public void getParentActivity(Activity parentActivity){
this.parentActivity = parentActivity;
}
@Override
public void onPreExecute(){
pb.setVisibility(View.VISIBLE);
//parentActivity.getWindow().setFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,
// WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE);
super.onPreExecute();
}
@Override
protected String doInBackground(register.RegisterParams... params) {
try {
HttpURLConnection httpConn = openHTTP.prepareConnection("someurl");
String jsonInputString = "{ username: " + params[0].username +", email: " + params[0].email
+ ", password: " + params[0].password + "}";
try(OutputStream os = httpConn.getOutputStream()) {
byte[] input = jsonInputString.getBytes("utf-8");
os.write(input, 0, input.length);
} catch (Exception e){
e.printStackTrace();
}
try(BufferedReader br = new BufferedReader(
new InputStreamReader(httpConn.getInputStream(), "utf-8"))) {
StringBuilder response = new StringBuilder();
String responseLine = null;
while ((responseLine = br.readLine()) != null) {
response.append(responseLine.trim());
}
respond = response.toString();
return respond;
} catch (Exception e){
e.printStackTrace();
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String s) {
pb.setVisibility(View.GONE);
respondTextView.setText(s);
super.onPostExecute(s);
}
}
and I have external class openHTTP.java which is responsible for opening HttpUrlConnection:
public class openHTTP {
public openHTTP(){
}
//provide URL to external file that you want make POST request to
public HttpURLConnection prepareConnection(String URL){
try {
java.net.URL url = new URL(URL);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestMethod("POST");
con.setRequestProperty("Content-Type", "application/json; utf-8");
con.setRequestProperty("Accept", "application/json");
con.setDoOutput(true);
return con;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
Thanks in advance for help!
After logging processes I've discovered that exception:
java.io.IOException: Cleartext HTTP traffic to url not permitted
, now I'm on my way searching for this problem
So, it was enough to add android:usesCleartextTraffic="true"
in AndroidManifest.xml
Thanks for your help!
After logging processes I've discovered that exception: java.io.IOException: Cleartext HTTP traffic to url not permitted
.
So, it was enough to add android:usesCleartextTraffic="true"
in AndroidManifest.xml Thanks for your help!