thoerup/side9/ImageAdapter.java

package dk.thoerup.side9;

import java.io.File;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Bitmap.CompressFormat;
import android.os.Environment;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;

public class ImageAdapter extends BaseAdapter {
        final static String DIR_NAME = "/Side9";
        final static String THUMBDIR_NAME = "/.thumb/";

        
    //int mGalleryItemBackground;
    private Context mContext;
    
    ArrayList<ImageEntry> mImages = new ArrayList<ImageEntry>();
    
    
    
    
    
    int thumbSize;
    
    public static Bitmap generateAndLoadThumb(File image) {
        
        File thumbDir = new File(Environment.getExternalStorageDirectory().getPath() + DIR_NAME + THUMBDIR_NAME);
        String fileName = image.getName();
        File thumb = new File ( thumbDir.getPath() + "/" + fileName );
        
        Bitmap thumbBmp = null;
        
        if (! thumbDir.exists()) {
                thumbDir.mkdirs();
        }
        
        if (! thumb.exists() || thumb.lastModified() < image.lastModified()) {
                Bitmap bmp = BitmapFactory.decodeFile( image.getPath() );
                thumbBmp =  Bitmap.createScaledBitmap(bmp, bmp.getWidth()/4, bmp.getHeight()/4, true);

                try {
                        FileOutputStream fos = new FileOutputStream(thumb);
                        thumbBmp.compress(CompressFormat.JPEG, 90, fos);   
                        fos.close();
                        
                } catch (IOException e) {
                        Log.e("Side9", "error", e);
                }
                
        } else {
                thumbBmp = BitmapFactory.decodeFile( thumb.getPath());
        }       
        return thumbBmp;
    }

    public ImageAdapter(Context c) {
        mContext = c;
        
        String path = Environment.getExternalStorageDirectory().getPath() + DIR_NAME ;
                
        
        File root = new File(path);
        
        if (root.exists() == false) {
                Toast.makeText(mContext, "Side9 folder not found on sdcard", Toast.LENGTH_LONG).show();
                return;
        } 

        File files[] = root.listFiles( new ExtensionFilter("jpg") );
                
        
        for (File f : files) {          
                ImageEntry entry = new ImageEntry();
                entry.path = f.getPath(); 

                entry.thumb = generateAndLoadThumb(f);

                
                /* load captions */
                String infoFileName = f.getPath().replace(".jpg", ".txt");

                File infoFile = new File(infoFileName);
                if (infoFile.exists() ) { 
                        entry.caption = cleanString( getFileContent(infoFile) );
                } else {
                        entry.caption = "";
                }               
            
                mImages.add(entry);
        }
        
        Collections.sort(mImages,  new ImageEntry.PathComparator() );
        
        thumbSize = getSize();
    }
    
    public void cleanUp() {
        mImages.clear();
    }
    
    public void orderByPath() {
        Collections.sort(mImages, new ImageEntry.PathComparator());
        this.notifyDataSetChanged();
    }
    
    public void orderByCaption() {
        Collections.sort(mImages, new ImageEntry.CaptionComparator());
        this.notifyDataSetChanged();
    }
    

    public int getCount() {
        return mImages.size();
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }
    
    public ImageEntry getImageEntry(int position) {
        return mImages.get(position);
    }
    
    public ArrayList<ImageEntry> getImages() {
        return mImages;
    }
    
    private int getSize() {
                 DisplayMetrics metrics = new DisplayMetrics();
                 WindowManager wmgr = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
                 wmgr.getDefaultDisplay().getMetrics(metrics);
                 if (metrics.widthPixels < 480) {
                         return 150;
                 } else {
                         return 200;
                 }
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;
        if (convertView == null) {  // if it's not recycled, initialize some attributes
            imageView = new ImageView(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(thumbSize, thumbSize));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setAdjustViewBounds(true);   
            imageView.setPadding(4, 4, 4, 4);
        } else {
            imageView = (ImageView) convertView;
        }

        //imageView.setImageURI(  Uri.parse(mThumbPaths.get(position)) );
        imageView.setImageBitmap( mImages.get(position).thumb );
        return imageView;
    }
    
        String getFileContent(File filename) {
                try {
                        RandomAccessFile raf = new RandomAccessFile(filename, "r");
                        int size = (int)raf.length();
                        byte buf[] = new byte[size];
                        
                        raf.readFully(buf);                     
                        raf.close();
                        
                        return new String(buf);                 
                } catch (IOException e) {
                        Log.e("Side9", "Error", e);
                        return "";
                }
        }
        
        String cleanString(String input) { //trim and remove double spaces
                String res = input.trim();
                while ( res.contains( "  ")) {
                        res = res.replace("  ", " ");
                }
                
                return res;
        }
        

        
        
    
    class ExtensionFilter implements FilenameFilter {
        private String mExt;
        public ExtensionFilter(String ext) {
                mExt = ext;
        }

                @Override
                public boolean accept(File dir, String filename) {
                        String parts[] = filename.split("\\.");
                        if (parts.length > 1) {
                                String ext = parts[ parts.length -1];
                                if (ext.equals(mExt)) {
                                        return true;
                                }
                        }
                        return false;
                }
        
    }
}
1	package dk.thoerup.side9;
2
3	import java.io.File;
4	import java.io.FileOutputStream;
5	import java.io.FilenameFilter;
6	import java.io.IOException;
7	import java.io.RandomAccessFile;
8	import java.util.ArrayList;
9	import java.util.Collection;
10	import java.util.Collections;
11
12	import android.content.Context;
13	import android.graphics.Bitmap;
14	import android.graphics.BitmapFactory;
15	import android.graphics.Bitmap.CompressFormat;
16	import android.os.Environment;
17	import android.util.DisplayMetrics;
18	import android.util.Log;
19	import android.view.View;
20	import android.view.ViewGroup;
21	import android.view.WindowManager;
22	import android.widget.BaseAdapter;
23	import android.widget.GridView;
24	import android.widget.ImageView;
25	import android.widget.Toast;
26
27	public class ImageAdapter extends BaseAdapter {
28	final static String DIR_NAME = "/Side9";
29	final static String THUMBDIR_NAME = "/.thumb/";
30
31
32	//int mGalleryItemBackground;
33	private Context mContext;
34
35	ArrayList<ImageEntry> mImages = new ArrayList<ImageEntry>();
36
37
38
39
40
41	int thumbSize;
42
43	public static Bitmap generateAndLoadThumb(File image) {
44
45	File thumbDir = new File(Environment.getExternalStorageDirectory().getPath() + DIR_NAME + THUMBDIR_NAME);
46	String fileName = image.getName();
47	File thumb = new File ( thumbDir.getPath() + "/" + fileName );
48
49	Bitmap thumbBmp = null;
50
51	if (! thumbDir.exists()) {
52	thumbDir.mkdirs();
53	}
54
55	if (! thumb.exists() \|\| thumb.lastModified() < image.lastModified()) {
56	Bitmap bmp = BitmapFactory.decodeFile( image.getPath() );
57	thumbBmp = Bitmap.createScaledBitmap(bmp, bmp.getWidth()/4, bmp.getHeight()/4, true);
58
59	try {
60	FileOutputStream fos = new FileOutputStream(thumb);
61	thumbBmp.compress(CompressFormat.JPEG, 90, fos);
62	fos.close();
63
64	} catch (IOException e) {
65	Log.e("Side9", "error", e);
66	}
67
68	} else {
69	thumbBmp = BitmapFactory.decodeFile( thumb.getPath());
70	}
71	return thumbBmp;
72	}
73
74	public ImageAdapter(Context c) {
75	mContext = c;
76
77	String path = Environment.getExternalStorageDirectory().getPath() + DIR_NAME ;
78
79
80	File root = new File(path);
81
82	if (root.exists() == false) {
83	Toast.makeText(mContext, "Side9 folder not found on sdcard", Toast.LENGTH_LONG).show();
84	return;
85	}
86
87	File files[] = root.listFiles( new ExtensionFilter("jpg") );
88
89
90	for (File f : files) {
91	ImageEntry entry = new ImageEntry();
92	entry.path = f.getPath();
93
94	entry.thumb = generateAndLoadThumb(f);
95
96
97	/* load captions */
98	String infoFileName = f.getPath().replace(".jpg", ".txt");
99
100	File infoFile = new File(infoFileName);
101	if (infoFile.exists() ) {
102	entry.caption = cleanString( getFileContent(infoFile) );
103	} else {
104	entry.caption = "";
105	}
106
107	mImages.add(entry);
108	}
109
110	Collections.sort(mImages, new ImageEntry.PathComparator() );
111
112	thumbSize = getSize();
113	}
114
115	public void cleanUp() {
116	mImages.clear();
117	}
118
119	public void orderByPath() {
120	Collections.sort(mImages, new ImageEntry.PathComparator());
121	this.notifyDataSetChanged();
122	}
123
124	public void orderByCaption() {
125	Collections.sort(mImages, new ImageEntry.CaptionComparator());
126	this.notifyDataSetChanged();
127	}
128
129
130	public int getCount() {
131	return mImages.size();
132	}
133
134	public Object getItem(int position) {
135	return position;
136	}
137
138	public long getItemId(int position) {
139	return position;
140	}
141
142	public ImageEntry getImageEntry(int position) {
143	return mImages.get(position);
144	}
145
146	public ArrayList<ImageEntry> getImages() {
147	return mImages;
148	}
149
150	private int getSize() {
151	DisplayMetrics metrics = new DisplayMetrics();
152	WindowManager wmgr = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
153	wmgr.getDefaultDisplay().getMetrics(metrics);
154	if (metrics.widthPixels < 480) {
155	return 150;
156	} else {
157	return 200;
158	}
159	}
160
161	public View getView(int position, View convertView, ViewGroup parent) {
162	ImageView imageView;
163	if (convertView == null) { // if it's not recycled, initialize some attributes
164	imageView = new ImageView(mContext);
165	imageView.setLayoutParams(new GridView.LayoutParams(thumbSize, thumbSize));
166	imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
167	imageView.setAdjustViewBounds(true);
168	imageView.setPadding(4, 4, 4, 4);
169	} else {
170	imageView = (ImageView) convertView;
171	}
172
173	//imageView.setImageURI( Uri.parse(mThumbPaths.get(position)) );
174	imageView.setImageBitmap( mImages.get(position).thumb );
175	return imageView;
176	}
177
178	String getFileContent(File filename) {
179	try {
180	RandomAccessFile raf = new RandomAccessFile(filename, "r");
181	int size = (int)raf.length();
182	byte buf[] = new byte[size];
183
184	raf.readFully(buf);
185	raf.close();
186
187	return new String(buf);
188	} catch (IOException e) {
189	Log.e("Side9", "Error", e);
190	return "";
191	}
192	}
193
194	String cleanString(String input) { //trim and remove double spaces
195	String res = input.trim();
196	while ( res.contains( " ")) {
197	res = res.replace(" ", " ");
198	}
199
200	return res;
201	}
202
203
204
205
206
207	class ExtensionFilter implements FilenameFilter {
208	private String mExt;
209	public ExtensionFilter(String ext) {
210	mExt = ext;
211	}
212
213	@Override
214	public boolean accept(File dir, String filename) {
215	String parts[] = filename.split("\\.");
216	if (parts.length > 1) {
217	String ext = parts[ parts.length -1];
218	if (ext.equals(mExt)) {
219	return true;
220	}
221	}
222	return false;
223	}
224
225	}
226	}