Android Open Source - GalDroid Gallery Activity

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License

The source code is released under:
GNU General Public License
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Java Source Code

/*
 * GalDroid - a webgallery frontend for android
 * Copyright (C) 2011  Raptor 2101 [raptor2101@gmx.de]
 *    /*ww  w. j  a  v a2 s .c  o m*/
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.  
 */

package de.raptor2101.GalDroid.Activities;

import java.io.File;
import java.io.Serializable;
import java.lang.ref.WeakReference;
import java.security.NoSuchAlgorithmException;
import java.util.List;

import de.raptor2101.GalDroid.R;
import de.raptor2101.GalDroid.WebGallery.Interfaces.GalleryObject;
import de.raptor2101.GalDroid.WebGallery.Interfaces.WebGallery;
import de.raptor2101.GalDroid.WebGallery.Tasks.GalleryLoaderTask;
import de.raptor2101.GalDroid.WebGallery.Tasks.GalleryLoaderTaskListener;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.ContentValues;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.ViewGroup.LayoutParams;

public abstract class GalleryActivity extends Activity {
  private static final String INSTANCE_STATE_CURRENT_INDEX = ".de.raptor2101.GalDroid.CurrentIndex";
  private static final String INSTANCE_STATE_GALLERY_OBJECTS = ".de.raptor2101.GalDroid.GalleryObjects";
  private List<GalleryObject> mGalleryObjects;
  private int mCurrentIndex;
  
  private class GalleryLoadingListener implements GalleryLoaderTaskListener {

    public void onDownloadStarted() {
      mProgressDialog.show();
    }

    public void onDownloadProgress(int elementCount, int maxCount) {
      mProgressDialog.setMax(maxCount);
      mProgressDialog.setProgress(elementCount);

    }

    public void onDownloadCompleted(List<GalleryObject> galleryObjects) {
      mProgressDialog.dismiss();
      GalDroidApp app = (GalDroidApp) getApplicationContext();
      app.storeGalleryObjects(getDisplayedGallery(), galleryObjects);
      mGalleryObjects = galleryObjects;
      Log.d("GalleryActivity", "Call onGalleryObjectsLoaded");
      onGalleryObjectsLoaded(galleryObjects);

    }
  }

  
  
  private ProgressDialog mProgressDialog;
  private GalleryLoaderTaskListener mListener;

  private WeakReference<GalleryLoaderTask> mDownloadTask;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.d("GalleryActivity", "New Activity");
    try {
      initialize();

    } catch (NoSuchAlgorithmException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }

  @SuppressWarnings("unchecked")
  @Override
  protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    GalDroidApp app = (GalDroidApp) getApplicationContext();
    
    if(savedInstanceState != null) {
      mCurrentIndex = savedInstanceState.getInt(INSTANCE_STATE_CURRENT_INDEX);
      mGalleryObjects = (List<GalleryObject>) savedInstanceState.getSerializable(INSTANCE_STATE_GALLERY_OBJECTS);
    } else {
      mCurrentIndex = -1;
      mGalleryObjects = null;
    }
      

    GalleryObject diplayedGallery = getDisplayedGallery();

    // Try to get galleryobjects from application cache
    if (mGalleryObjects == null) {
      mGalleryObjects = app.loadStoredGalleryObjects(diplayedGallery);
    }

    // Now we have time, load the object from the remote source
    if (mGalleryObjects == null) {
      mProgressDialog = new ProgressDialog(this);
      mProgressDialog.setTitle(R.string.progress_title_load_gallery);
      mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
      mProgressDialog.setCancelable(false);
      mProgressDialog.dismiss();

      WebGallery gallery = app.getWebGallery();
      if (gallery != null) {
        LayoutParams params = this.getWindow().getAttributes();
        gallery.setPreferedDimensions(params.height, params.width);
        mListener = new GalleryLoadingListener();
        GalleryLoaderTask task = new GalleryLoaderTask(gallery, mListener);
        task.execute(diplayedGallery);
        mDownloadTask = new WeakReference<GalleryLoaderTask>(task);
      } else {
        // Without a valid Gallery nothing can be displayed... back to
        // previous activity
        this.finish();
      }
    } else {
      onGalleryObjectsLoaded(mGalleryObjects);
    }
  }

  @Override
  protected void onResume() {
    super.onResume();
    Log.d("GalleryActivity", "Resume Activity");
    try {
      initialize();
    } catch (NoSuchAlgorithmException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }

  }

  private void initialize() throws NoSuchAlgorithmException {
    GalDroidApp app = (GalDroidApp) getApplicationContext();
    app.Initialize(this);
  }

  @Override
  public void onSaveInstanceState(Bundle savedInstanceState) {
    savedInstanceState.putSerializable(INSTANCE_STATE_GALLERY_OBJECTS, (Serializable) mGalleryObjects);
    savedInstanceState.putInt(INSTANCE_STATE_CURRENT_INDEX, mCurrentIndex);
    
    super.onSaveInstanceState(savedInstanceState);
  }

  public abstract void onGalleryObjectsLoaded(List<GalleryObject> galleryObjects);

  public GalleryObject getDisplayedGallery() {
    try {
      return (GalleryObject) getIntent().getExtras().get(GalDroidApp.INTENT_EXTRA_DISPLAY_GALLERY);
    } catch (Exception e) {
      return null;
    }

  }

  public int getCurrentIndex() {
    return mCurrentIndex;
  }

  protected void setCurrentIndex(int index) {
    mCurrentIndex = index;
  }

  public boolean areGalleryObjectsAvailable() {
    return mGalleryObjects != null;
  }

  public GalleryLoaderTask getDownloadTask() {
    if (mDownloadTask != null) {
      return mDownloadTask.get();
    } else {
      return null;
    }
  }
  
  public void showProgressBar(int textId) {
    mProgressDialog.setTitle(R.string.progress_title_load_gallery);
    mProgressDialog.setMax(100);
    mProgressDialog.setProgress(0);
    mProgressDialog.show();
  }
  
  public void updateProgressBar(int current, int max) {
    mProgressDialog.setMax(max);
    mProgressDialog.setProgress(current);
  }
  
  public void dismissProgressBar() {
    mProgressDialog.dismiss();
  }
  

  
  protected void callShareIntentActivity(File file) {
    ContentValues values = new ContentValues(2);
    values.put(MediaStore.Images.Media.MIME_TYPE, "image/png");
    values.put(MediaStore.Images.Media.DATA, file.getAbsolutePath());
    Uri uri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
    Intent intent = new Intent(Intent.ACTION_SEND);
    intent.setType("image/png");
    intent.putExtra(Intent.EXTRA_STREAM, uri);
    intent = Intent.createChooser(intent, "Share Image");
    this.startActivity(intent);
  }
}
Java Source Code List
