Android Open Source - campus Images Dir Async Task

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License

The source code is released under:

GNU General Public License

Java Source Code

package lecho.app.campus.utils;
/*from w w  w.  j  av  a2  s  . c  o m*/
import java.io.IOException;
import java.lang.ref.WeakReference;

import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;

/**
 * Lists images paths available for place with given symbol.
 * 
 * @author Lecho
 * 
 */
public class ImagesDirAsyncTask extends AsyncTask<String, Void, String[]> {
  private static final String TAG = "ImagesDirAsyncTask";
  private final Context mContext;
  private final WeakReference<OnImagesDirListener> mListenerReference;

  public ImagesDirAsyncTask(Context context, OnImagesDirListener listener) {
    mContext = context;
    mListenerReference = new WeakReference<OnImagesDirListener>(listener);
  }

  @Override
  protected String[] doInBackground(String... params) {
    final String symbol = params[0];// crush crush crush
    try {
      final String placeImagesDir = Utils.getPlaceImagesDir(symbol);
      String[] paths;
      paths = mContext.getAssets().list(placeImagesDir);
      return paths;
    } catch (IOException e) {
      Log.e(TAG, "Could not list photos for place with symbol: " + symbol, e);
      return null;
    }

  }

  @Override
  protected void onPostExecute(String[] result) {
    callListener(result);
  }

  private void callListener(String[] paths) {
    if (mListenerReference != null) {
      final OnImagesDirListener listener = mListenerReference.get();
      if (null != listener) {
        listener.onImagesDir(paths);
      }

    }
  }

  public interface OnImagesDirListener {
    public void onImagesDir(String[] paths);
  }
}

Java Source Code List

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