Issue
I'm Using inner AsyncTask to Calculate the Average from remote DB, I get the result but
The problem is : The value of Average available only in "onPostExecute" , I want this value to be accessible in "On Create ()" so I can send it to another AsyncTask in the same Activity
public class Place_details extends Activity {
RatingBar PlaceRatingBar;
UserSessionManager session;
String ID;
Double [] Place_rates;
int Total_place_rates;
float Average_place_rates;
// JSON
JSONParser jsonparser;
JSONObject JSONObject;
ProgressDialog ProgressDialog;
JSONArray jsonArray1;
int value;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_place_details);
PlaceRatingBar = (RatingBar) findViewById (R.id.Place_rating);
jsonparser = new JSONParser();
//Session
session = new UserSessionManager(Place_details.this);
new getPlaceRating().execute() ;
// Here I get 0.0 and not the correct Average
Toast.makeText(Place_details.this, ""+Average_place_rates, Toast.LENGTH_SHORT).show();
} // End Of OnCreate
public class getPlaceRating extends AsyncTask<String,String,String>{
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
ProgressDialog = new ProgressDialog(Place_details.this);
ProgressDialog.setTitle("Wait....");
ProgressDialog.setIndeterminate(false);
ProgressDialog.setCancelable(true);
ProgressDialog.show();
}
@Override
protected String doInBackground(String...parma) {
// TODO Auto-generated method stub
List<NameValuePair> list = new ArrayList<NameValuePair>();
// passing place_id value
list.add(new BasicNameValuePair("id",String_Place_id));
try {
JSONObject = jsonparser.makeHttpRequest("http://192.168.1.2/Yourguideapplication/Place_rating2.php", "POST", list);
Log.e("pass 1", "connection success ");
}
catch (Exception e) {
Log.e("Fail 1", "Fail connection");
}
try {
value = JSONObject.getInt("value");
if (value==1){
//Place Rating
jsonArray1 = JSONObject.getJSONArray("Place_rating");
Place_rates = new Double[jsonArray1.length()];
Total_place_rates =0;
for (int i = 0 ; i < jsonArray1.length() ; i++)
{
JSONObject object = jsonArray1.getJSONObject(i);
Place_rates[i] = object.getDouble("Rating_box");
Total_place_rates+= Place_rates[i];
}
} else {
value = 0;
}
} catch (Exception e){
Log.d("ERORR",e.getMessage());
}
return null;
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if (value == 1){
//Place Rating
Average_place_rates = (float) (Total_place_rates/jsonArray1.length());
PlaceRatingBar.setRating((float) Average_place_rates);
} else {
Toast.makeText(Place_details.this, "Error", Toast.LENGTH_LONG).show();
}
ProgressDialog.dismiss();
}
}
}
Thank you
Solution
You can create something like
private interface CallbackListener<T> {
void onComputingFinished(T arg);
}
Make your activity implement this interface.
public class Place_details extends Activity implements CallbackListener<String> {
@Override
public void onComputingFinished(String arg) {
//do your stuff here
}
And register it as listener in your AsynTask class (create field and constructor in you AsyncTask class):
public class GetPlaceRating extends AsyncTask<String,String,String>{
private CallbackListener<String> mListener;
public GetPlaceRating(CallbackListener<String> listener) {
mListener = listener;
}
And when starting task
new GetPlaceRating(this).execute() ;
And in onPostExecute call
if (mListener != null) mListener.onComputingFinished(*your arg*);
I used String to replace generic T in this example, hope you understand you can use whatever you want.
EDITED: If arguments are of the same type you can change signature of interface to:
private interface CallbackListener<T> {
void onComputingFinished(T ...args);
}
And access them as an array: args[0], args[1]. Or just specify what concrete arguments you want to pass, for example String, int and SomeClass:
private interface CallbackListener {
void onComputingFinished(String str, int value, SomeClass obj);
}
Answered By - Yaroslav
0 comments:
Post a Comment
Note: Only a member of this blog may post a comment.