ImageListFrag.java

package com.deardhruv.swipevolley.fragments;

import java.util.ArrayList;

import org.json.JSONArray;
import org.json.JSONObject;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;

import com.android.volley.VolleyError;
import com.android.volley.examples.toolbox.updated.IJSONParseListener;
import com.android.volley.examples.toolbox.updated.JSONRequestHandler;
import com.deardhruv.swipevolley.R;
import com.deardhruv.swipevolley.adapters.ItemDetailAdapter;
import com.deardhruv.swipevolley.model.ImageItem;
import com.deardhruv.swipevolley.network.ServiceURL;

/**
 * A fragment which displays the List of the images.
 */
public class ImageListFrag extends Fragment implements IJSONParseListener, OnItemClickListener {
	private static final int REQUEST_IMG_LIST_CODE = 101;

	private ProgressDialog pd;
	private ListView list;
	private ItemDetailAdapter adapter;
	private View fragView;

	public ImageListFrag() {
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
		fragView = inflater.inflate(R.layout.fragment_main_dummy, container, false);
		list = (ListView) fragView.findViewById(R.id.listView1);
		return fragView;
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
		super.onActivityCreated(savedInstanceState);
		getImages(getActivity());
	}

	@Override
	public void onDestroy() {
		list.setAdapter(null);
		super.onDestroy();
	}

	void getImages(Context mContext) {
		pd = ProgressDialog.show(mContext, "Please wait", "getting images...");
		if (!pd.isShowing()) {
			pd.show();
		}
		getActivity().setProgressBarIndeterminateVisibility(true);

		JSONRequestHandler mResponse = new JSONRequestHandler();
		mResponse.getResponse(ServiceURL.mainURL, REQUEST_IMG_LIST_CODE, this);
	}

	@Override
	public void ErrorResponse(VolleyError error, int requestCode) {
		if (pd.isShowing()) {
			pd.dismiss();
		}
		getActivity().setProgressBarIndeterminateVisibility(false);
		if (requestCode == REQUEST_IMG_LIST_CODE) {
			Log.e("error", "" + error.toString());
		}
	}

	ArrayList<ImageItem> mList = null;

	@Override
	public void SuccessResponse(JSONObject response, int requestCode) {
		if (pd.isShowing()) {
			pd.dismiss();
		}
		getActivity().setProgressBarIndeterminateVisibility(false);

		if (requestCode == REQUEST_IMG_LIST_CODE) {
			Log.d("reponse", "" + response.toString());
			try {
				JSONArray mJsonArray = new JSONArray(response.get("result").toString());
				if (mJsonArray.length() > 0) {
					mList = new ArrayList<ImageItem>();
					for (int i = 0; i < mJsonArray.length(); i++) {
						ImageItem itemDetail = new ImageItem();

						itemDetail.setImgUrl(mJsonArray.getJSONObject(i).getString("img"));
						itemDetail.setName(mJsonArray.getJSONObject(i).getString("name"));

						mList.add(itemDetail);
					}
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
			adapter = new ItemDetailAdapter(getActivity(), mList);
			list.setAdapter(adapter);
			list.setOnItemClickListener(ImageListFrag.this);
		}
	}

	public interface ShareViewItem {
		// Interface method you will call from this fragment
		public void shareItem(ImageItem viewItem);
	}

	ShareViewItem mCallback = null;

	@Override
	public void onAttach(Activity activity) {
		super.onAttach(activity);

		try {
			mCallback = (ShareViewItem) activity;
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}

	public void changeImagePreview(ImageItem itemDetail) {

		// Then use the interface callback to tell activity item is shared
		if (mCallback != null) {
			mCallback.shareItem(itemDetail);
		}
	}

	@Override
	public void onItemClick(AdapterView<?> arg0, View arg1, int pos, long arg3) {
		if (mList != null) {
			changeImagePreview(mList.get(pos));
		}
	}

}