Android Open Source - CamTimer Library Activity

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Back to project page CamTimer.
License

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

package com.dozingcatsoftware.cameratimer;
/*from w w w . j a  va2  s  . c  o  m*/
import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.dozingcatsoftware.util.AsyncImageLoader;
import com.dozingcatsoftware.util.ScaledBitmapCache;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.SimpleAdapter;
import android.widget.AdapterView.OnItemClickListener;

public class LibraryActivity extends Activity {
  
  static int CELL_WIDTH = 92;
  static int CELL_HEIGHT = 69;
  
  String imageDirectory;
  
  GridView gridView;
  int selectedGridIndex;
  
  List imageMaps = new ArrayList();
  static String IMAGE_URI_KEY = "imageUri";
  
  // A cache of scaled Bitmaps for the image files, so we can avoid reloading them as the user scrolls.
  ScaledBitmapCache bitmapCache;
  AsyncImageLoader imageLoader = new AsyncImageLoader();
  
  public static Intent intentWithImageDirectory(Context parent, String imageDirectory) {
    Intent intent = new Intent(parent, LibraryActivity.class);
    intent.putExtra("imageDirectory", imageDirectory);
    return intent;
  }

  @Override
  public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    setContentView(R.layout.library_list);
    
    imageDirectory = getIntent().getStringExtra("imageDirectory");
    bitmapCache = new ScaledBitmapCache(this, imageDirectory + File.separator + "thumbnails");
    
    gridView = (GridView) findViewById(R.id.gridview);
    gridView.setOnItemClickListener(new OnItemClickListener() {
      public void onItemClick(AdapterView parent, View view, int position, long id) {
        selectedGridIndex = position;
        ViewImageActivity.startActivityWithImageURI(LibraryActivity.this, 
            (Uri)((Map)imageMaps.get(position)).get(IMAGE_URI_KEY), "image/jpeg");
      }
    });
    readImageThumbnails();
    displayGrid();
    }
  
  void readImageThumbnails() {
    List<String> filenames = Collections.emptyList();
    File dir = new File(imageDirectory);
    if (dir.isDirectory()) {
      filenames = Arrays.asList(dir.list());
    }
    Collections.sort(filenames);
    Collections.reverse(filenames);

    imageMaps.clear();
    for(String fname : filenames) {
      if (fname.endsWith(".jpg")) {
        Uri imageUri = Uri.fromFile(new File(imageDirectory + File.separator + fname));
        Map dmap = new HashMap();
        dmap.put(IMAGE_URI_KEY, imageUri);
        imageMaps.add(dmap);
      }
    }
  }
  
  void displayGrid() {
    SimpleAdapter adapter = new SimpleAdapter(this, imageMaps, 
        R.layout.library_cell, 
        new String[] {IMAGE_URI_KEY}, 
        new int[] {R.id.grid_image});
    adapter.setViewBinder(new SimpleAdapter.ViewBinder() {
      public boolean setViewValue(View view, Object data, String textRepresentation) {
        Uri imageUri = (Uri)data;
        imageLoader.loadImageIntoViewAsync(bitmapCache, imageUri, (ImageView)view, CELL_WIDTH, CELL_HEIGHT, getResources());
        return true;
      }
    });
    gridView.setAdapter(adapter);
    
    // show text message if no images available
    View noImagesView = findViewById(R.id.noImagesTextView);
    noImagesView.setVisibility(imageMaps.size()>0 ? View.GONE : View.VISIBLE);
  }
  
  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode==ViewImageActivity.DELETE_RESULT) {
      bitmapCache.removeUri((Uri)((Map)imageMaps.get(selectedGridIndex)).get(IMAGE_URI_KEY));
      imageMaps.remove(selectedGridIndex);
      displayGrid();
    }
  }

}
Java Source Code List
