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मैं नक्शे apiv2 से निपट रहा हूं। और डायलॉग फ्रैगमेंट क्लास के लिए कोडिंग करते समय मुझे निम्न त्रुटि मिल रही है।खंडों में गैर-डिफ़ॉल्ट कन्स्ट्रक्टर त्रुटि
public PlaceDialogFragment(){
super();
}
public PlaceDialogFragment(Place place, DisplayMetrics dm){
super();
this.mPlace = place;
this.mMetrics = dm;
}
किसी भी मदद की सराहना की wud ..
संशोधित:
Error :
Avoid non-default constructors in fragments: use a default constructor plus Fragment#setArguments(Bundle) instead:
इस कोड है इस पूरे कोड है ... मैं एक नौसिखिया की तरह हूँ और कभी नहीं टुकड़ों से निपटने से पहले..मैं एक नक्शा टट के माध्यम से जा रहा था और पाया ... क्या आप अब विस्तार से बता सकते हैं कि आप समझाने की कोशिश कर रहे थे ..
package com.example.travelplanner;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ViewFlipper;
// Defining DialogFragment class to show the place details with photo
public class PlaceDialogFragment extends DialogFragment{
TextView mTVPhotosCount = null;
TextView mTVVicinity = null;
ViewFlipper mFlipper = null;
Place mPlace = null;
DisplayMetrics mMetrics = null;
public PlaceDialogFragment(){
super();
}
public PlaceDialogFragment(Place place, DisplayMetrics dm){
super();
this.mPlace = place;
this.mMetrics = dm;
}
@Override
public void onCreate(Bundle savedInstanceState) {
// For retaining the fragment on screen rotation
setRetainInstance(true);
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.dialog_layout, null);
// Getting reference to ViewFlipper
mFlipper = (ViewFlipper) v.findViewById(R.id.flipper);
// Getting reference to TextView to display photo count
mTVPhotosCount = (TextView) v.findViewById(R.id.tv_photos_count);
// Getting reference to TextView to display place vicinity
mTVVicinity = (TextView) v.findViewById(R.id.tv_vicinity);
if(mPlace!=null){
// Setting the title for the Dialog Fragment
getDialog().setTitle(mPlace.mPlaceName);
// Array of references of the photos
Photo[] photos = mPlace.mPhotos;
// Setting Photos count
mTVPhotosCount.setText("Photos available : " + photos.length);
// Setting the vicinity of the place
mTVVicinity.setText(mPlace.mVicinity);
// Creating an array of ImageDownloadTask to download photos
ImageDownloadTask[] imageDownloadTask = new ImageDownloadTask[photos.length];
int width = (int)(mMetrics.widthPixels*3)/4;
int height = (int)(mMetrics.heightPixels*1)/2;
String url = "https://maps.googleapis.com/maps/api/place/photo?";
String key = "key=AIzaSyBSo1xlML-tOFTCdJb6qIbVnF9e7y5nj0o";
String sensor = "sensor=true";
String maxWidth="maxwidth=" + width;
String maxHeight = "maxheight=" + height;
url = url + "&" + key + "&" + sensor + "&" + maxWidth + "&" + maxHeight;
// Traversing through all the photoreferences
for(int i=0;i<photos.length;i++){
// Creating a task to download i-th photo
imageDownloadTask[i] = new ImageDownloadTask();
String photoReference = "photoreference="+photos[i].mPhotoReference;
// URL for downloading the photo from Google Services
url = url + "&" + photoReference;
// Downloading i-th photo from the above url
imageDownloadTask[i].execute(url);
}
}
return v;
}
@Override
public void onDestroyView() {
if (getDialog() != null && getRetainInstance())
getDialog().setDismissMessage(null);
super.onDestroyView();
}
private Bitmap downloadImage(String strUrl) throws IOException{
Bitmap bitmap=null;
InputStream iStream = null;
try{
URL url = new URL(strUrl);
/** Creating an http connection to communcate with url */
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
/** Connecting to url */
urlConnection.connect();
/** Reading data from url */
iStream = urlConnection.getInputStream();
/** Creating a bitmap from the stream returned from the url */
bitmap = BitmapFactory.decodeStream(iStream);
}catch(Exception e){
Log.d("Exception while downloading url", e.toString());
}finally{
iStream.close();
}
return bitmap;
}
private class ImageDownloadTask extends AsyncTask<String, Integer, Bitmap>{
Bitmap bitmap = null;
@Override
protected Bitmap doInBackground(String... url) {
try{
// Starting image download
bitmap = downloadImage(url[0]);
}catch(Exception e){
Log.d("Background Task",e.toString());
}
return bitmap;
}
@Override
protected void onPostExecute(Bitmap result) {
// Creating an instance of ImageView to display the downloaded image
ImageView iView = new ImageView(getActivity().getBaseContext());
// Setting the downloaded image in ImageView
iView.setImageBitmap(result);
// Adding the ImageView to ViewFlipper
mFlipper.addView(iView);
// Showing download completion message
Toast.makeText(getActivity().getBaseContext(), "Image downloaded successfully", Toast.LENGTH_SHORT).show();
}
}
}
त्रुटि पंक्ति सुपर पर PlaceDialogFragment की पैरामिट्रीकृत निर्माता में लागू किया जाता है के लिए काम किया(); – Divyang
मैंने कुछ उत्तरों की जांच की और पाया कि यदि आप कन्स्ट्रक्टर से सुपर() को हटाते हैं तो इसे ठीक काम करना चाहिए ... – Vickyexpert