gistfile1.java

package com.example.wk.projektkoncowywiolettakurek.Classes;

import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.util.Log;

import com.example.wk.projektkoncowywiolettakurek.Collages.CollageActivity;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.IOException;
import java.util.ArrayList;

/**
 * Created by Hecate on 2016-12-13.
 */
public class DownloadJSON extends AsyncTask<String, Void, String> {

    private ProgressDialog pDialog; // kontrolka wyswietlana podczas długotrwałych operacji
    JSONArray allImagesJson = new JSONArray();
    private ArrayList<DownloadPhotosData> listImages = new ArrayList<>();

    public DownloadJSON(Context context) {
        pDialog = new ProgressDialog(context);
        pDialog.setMessage("Pobieranie...");
        pDialog.setCancelable(false); // nie da się zamknąć klikając w ekran
    }

    @Override
    protected String doInBackground(String... strings) {

        HttpPost httpPost = new HttpPost(strings[0]);
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpResponse httpResponse = null;

        try {
            httpResponse = httpClient.execute(httpPost);
        } catch (IOException e) {
            e.printStackTrace();
        }
        String jsonString = null;
        try {
            jsonString = EntityUtils.toString(httpResponse.getEntity(), HTTP.UTF_8);
        } catch (IOException e) {
            e.printStackTrace();
        }
        JSONObject jsonObj = null;
        try {
            jsonObj = new JSONObject(jsonString);
            Log.e("result = ", jsonString);
        } catch (JSONException e) {
            e.printStackTrace();
        }
        try {
            allImagesJson = jsonObj.getJSONArray("imagesData");
        } catch (JSONException e) {
            e.printStackTrace();
        }

        for (int i = 0; i < allImagesJson.length(); i++) {
            JSONObject object = null;
            try {
                object = allImagesJson.getJSONObject(i);
                String imageName = object.getString("imageName");
                String imageSaveTime = object.getString("saveData");
                listImages.add(new DownloadPhotosData(imageName, imageSaveTime));
                Log.e("name:", imageName);
                Log.e("data:", imageSaveTime);
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }

        Intent intent = new Intent();
        intent.putExtra("imagesData", listImages);
        return null;
    }

    @Override
    protected void onPreExecute() {
        pDialog.show();
        super.onPreExecute();
    }

    @Override
    protected void onPostExecute(String s) {
        pDialog.dismiss();
        super.onPostExecute(s);
    }
}