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Copyright (c) 2014, James Van Gaasbeck All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are m...
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package knightnews.android; //from w ww .j a v a 2s .com import android.app.Activity; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.Matrix; import android.os.AsyncTask; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import com.android.volley.RequestQueue; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.JsonObjectRequest; import com.android.volley.toolbox.Volley; import com.squareup.picasso.Picasso; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import java.util.ArrayList; public class FeedFragment extends ListFragment { private static final String TAG = "FeedFragment"; private static final String URL_JSON = "http://knightnews.com/api/get_recent_posts/"; private static final String TAG_POSTS = "posts"; private static final String TAG_URL = "url"; private static final String TAG_TITLE = "title"; private static final String TAG_CONTENT = "content"; private static final String TAG_DATE = "date"; private static final String TAG_IMAGE = "image"; private static final String TAG_AUTHOR = "author"; private static final String TAG_NAME = "name"; private RequestQueue mQueue; private ArrayList<StoryItem> mItems; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setRetainInstance(true); mItems = new ArrayList<StoryItem>(); mQueue = Volley.newRequestQueue(getActivity()); JsonObjectRequest request = new JsonObjectRequest(URL_JSON, null, new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject response) { // VolleyLog.v("Response:%n %s", response.toString(4)); // Log.i(TAG, "Response: " + response.toString()); parseJSON(response); setUpAdapter(); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { //VolleyLog.e("Error: ", error.getMessage()); } } ); setUpAdapter(); request.setTag(this); mQueue.add(request); // Execute the AsyncTask to go and DL our RSS. // new FetchItemsTask().execute(); } private void setUpAdapter() { // null checks because we are using asynchtasks we need to make sure we // have a hosting activity. if (getActivity() == null) return; if (mItems != null) { // set up the adapter setListAdapter(new StoryAdapter(mItems)); } else { setListAdapter(null); } } @Override public void onListItemClick(ListView l, View v, int position, long id) { // take user to article // // Get the story from the adapter using the position. StoryItem story = mItems.get(position); // // Uri storyUrl = Uri.parse(story.getUrl()); // // Intent i = new Intent(Intent.ACTION_VIEW, storyUrl); // // startActivity(i); Intent i = new Intent(getActivity(), ReaderActivity.class); i.putExtra(ReaderFragment.KEY_STORY, story); startActivity(i); } // This is the AsynchTask // // private inner class to do all of the background networking work. private class FetchItemsTask extends AsyncTask<Void, Void, ArrayList<StoryItem>> { @Override protected ArrayList<StoryItem> doInBackground(Void... arg0) { // make sure we have an instance of the activity Activity act = getActivity(); if (act == null) return new ArrayList<StoryItem>(); // return the method we wrote to download the xml return new NewsFetcher().downloadStoryItems(); } // we cannot update the UI in the background, which is why we use this // method. It will be called when the thread has finished and we have // abuncha story items @Override protected void onPostExecute(ArrayList<StoryItem> result) { // get the result and put it in our list of stories mItems = result; // then we need to fill up the adapter to the list view setUpAdapter(); } } // This is the adapter class. // An adapter is the middle man between a view (i.e. ListFragment) and the // data. It is what get's the data that will fill the list view. private class StoryAdapter extends ArrayAdapter<StoryItem> { public StoryAdapter(ArrayList<StoryItem> stories) { super(getActivity(), R.layout.list_item_cell_story, stories); } @Override public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null) { convertView = getActivity().getLayoutInflater().inflate( R.layout.list_item_cell_story, null); } StoryItem s = getItem(position); ImageView image = (ImageView) convertView .findViewById(R.id.story_item_image); Picasso.with(getActivity()).load(s.getPictureUrl()).noFade() .into(image); // image.setImageResource(R.drawable.ic_launcher); TextView title = (TextView) convertView .findViewById(R.id.story_item_title_text); title.setText(s.getTitle()); TextView date = (TextView) convertView .findViewById(R.id.story_item_date_published_text); date.setText(s.getDate()); return convertView; } } private void parseJSON(JSONObject response) { if (response == null) return; try { JSONArray posts = response.getJSONArray(TAG_POSTS); for (int i = 0; i < posts.length(); i++) { JSONObject p = posts.getJSONObject(i); JSONObject customFields = p.getJSONObject("custom_fields"); String img = customFields.getString(TAG_IMAGE); String title = p.getString(TAG_TITLE); String url = p.getString(TAG_URL); String content = p.getString(TAG_CONTENT); String date = p.getString(TAG_DATE); JSONObject author = p.getJSONObject(TAG_AUTHOR); String name = author.getString(TAG_NAME); StoryItem item = new StoryItem(); item.setTitle(title); item.setDate(date); item.setContent(content); item.setUrl(url); item.setPictureUrl(img); item.setAuthor(name); mItems.add(item); } } catch (JSONException e) { e.printStackTrace(); } } @Override public void onDestroy() { super.onDestroy(); mQueue.cancelAll(this); } public static Bitmap getResizedBitmap(Bitmap bm, int newHeight, int newWidth) { int width = bm.getWidth(); int height = bm.getHeight(); float scaleWidth = ((float) newWidth) / width; float scaleHeight = ((float) newHeight) / height; // CREATE A MATRIX FOR THE MANIPULATION Matrix matrix = new Matrix(); // RESIZE THE BIT MAP matrix.postScale(scaleWidth, scaleHeight); // RECREATE THE NEW BITMAP Bitmap resizedBitmap = Bitmap.createBitmap(bm, 0, 0, width, height, matrix, false); return resizedBitmap; } }