Android Open Source - android-screenshot-gallery Picture Grid Fragment

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License

The source code is released under:

Apache License

Java Source Code

package com.demondevelopers.screenshotgallery;
/*w w w  .  ja  v a  2 s .com*/
import android.annotation.TargetApi;
import android.app.ActivityOptions;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.MediaStore.Images;
import android.provider.MediaStore.Images.Thumbnails;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.CursorAdapter;
import android.text.format.DateFormat;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.TextView;


public class PictureGridFragment extends BaseFragment
{
  private GridView       mGridView;
  private PictureAdapter mAdapter;
  
  
  public PictureGridFragment()
  {
    // Blank constructor required by platform
  }
  
  @Override
  public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    mAdapter = new PictureAdapter(getActivity());
    getLoaderManager().restartLoader(0, null, mAdapter);
  }
  
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
  {
    return inflater.inflate(R.layout.fragment_picture_grid, container, false);
  }
  
  @Override
  public void onViewCreated(View view, Bundle savedInstanceState)
  {
    super.onViewCreated(view, savedInstanceState);
    mGridView = (GridView)view.findViewById(R.id.picture_grid);
    mGridView.setAdapter(mAdapter);
    mGridView.setOnItemClickListener(mItemClickListener);
  }
  
  private AdapterView.OnItemClickListener mItemClickListener = new AdapterView.OnItemClickListener()
  {
    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id)
    {
      Cursor cursor = mAdapter.getCursor();
      if(cursor.moveToPosition(position)){
        getApp().putZoomImage(ImageUtils.getThumbSizedBitmap(view.getContext(), 
          cursor.getString(PictureQuery.DATA)));
      }
      Intent intent = PictureActivity.createIntent(view.getContext(), position);
      if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN){
        boolean wasEnabled = view.isDrawingCacheEnabled();
        view.setDrawingCacheEnabled(true);
        Bundle options = ActivityOptions.makeThumbnailScaleUpAnimation(
          view, Bitmap.createBitmap(view.getDrawingCache()), 0, 0).toBundle();
        view.setDrawingCacheEnabled(wasEnabled);
        getActivity().startActivity(intent, options);
      }
      else{
        getActivity().startActivity(intent);
      }
    }
  };
  
  @Override
  public void onDestroy()
  {
    super.onDestroy();
    mAdapter.changeCursor(null);
  }
  
  
  private class PictureAdapter extends CursorAdapter
    implements LoaderCallbacks<Cursor>
  {
    private LayoutInflater mInflater;
    
    
    public PictureAdapter(Context context)
    {
      super(context, null, 0);
      mInflater = LayoutInflater.from(context);
    }
    
    @Override
    public Loader<Cursor> onCreateLoader(int id, Bundle args)
    {
      return new CursorLoader(getActivity(), 
        PictureQuery.URI, PictureQuery.PROJECTION, 
        null, null, Images.Media.DEFAULT_SORT_ORDER);
    }
    
    @Override
    public void onLoadFinished(Loader<Cursor> loader, Cursor data)
    {
      mAdapter.changeCursor(data);
    }
    
    @Override
    public void onLoaderReset(Loader<Cursor> loader)
    {
      //
    }
    
    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent)
    {
      return mInflater.inflate(R.layout.item_picture, parent, false);
    }
    
    @Override
    public void bindView(View view, Context context, Cursor cursor)
    {
      ((ThumbView)view.findViewById(R.id.picture_item_thumb))
        .setImageThumbnail(cursor.getLong(PictureQuery._ID), Thumbnails.MICRO_KIND);
      
      ((TextView)view.findViewById(R.id.picture_item_text1))
        .setText(cursor.getString(PictureQuery.TITLE));
      
      ((TextView)view.findViewById(R.id.picture_item_text2))
        .setText(DateFormat.getDateFormat(view.getContext())
          .format(cursor.getLong(PictureQuery.DATE)));
    }
  }
  
  private static interface PictureQuery
  {
    public static final Uri URI = Images.Media.EXTERNAL_CONTENT_URI;
    
    public static final String[] PROJECTION = {
      Images.ImageColumns._ID,
      Images.ImageColumns.TITLE,
      Images.ImageColumns.DATE_TAKEN,
      Images.ImageColumns.DATA
    };
    
    public static int _ID   = 0;
    public static int TITLE = 1;
    public static int DATE  = 2;
    public static int DATA  = 3;
  }
}

Java Source Code List

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