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	torben	790	package dk.thoerup.side9;
2
3			import java.io.File;
4	torben	1013	import java.io.FileOutputStream;
5	torben	925	import java.io.FilenameFilter;
6	torben	1013	import java.io.IOException;
7	torben	1185	import java.io.RandomAccessFile;
8	torben	790	import java.util.ArrayList;
9	torben	1185	import java.util.Collection;
10			import java.util.Collections;
11	torben	790
12			import android.content.Context;
13			import android.graphics.Bitmap;
14			import android.graphics.BitmapFactory;
15	torben	1013	import android.graphics.Bitmap.CompressFormat;
16	torben	790	import android.os.Environment;
17	torben	915	import android.util.DisplayMetrics;
18	torben	1013	import android.util.Log;
19	torben	790	import android.view.View;
20			import android.view.ViewGroup;
21	torben	915	import android.view.WindowManager;
22	torben	790	import android.widget.BaseAdapter;
23			import android.widget.GridView;
24			import android.widget.ImageView;
25	torben	912	import android.widget.Toast;
26	torben	790
27			public class ImageAdapter extends BaseAdapter {
28	torben	1222	final static String DIR_NAME = "/Side9";
29			final static String THUMBDIR_NAME = "/.thumb/";
30	torben	1185
31
32	torben	790	//int mGalleryItemBackground;
33			private Context mContext;
34
35	torben	1185	ArrayList<ImageEntry> mImages = new ArrayList<ImageEntry>();
36	torben	915
37	torben	1185
38
39
40	torben	1212
41	torben	1185	int thumbSize;
42	torben	1222
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	torben	790
59	torben	1222	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	torben	790	public ImageAdapter(Context c) {
75			mContext = c;
76
77	torben	1222	String path = Environment.getExternalStorageDirectory().getPath() + DIR_NAME ;
78
79	torben	790
80			File root = new File(path);
81	torben	912
82			if (root.exists() == false) {
83			Toast.makeText(mContext, "Side9 folder not found on sdcard", Toast.LENGTH_LONG).show();
84			return;
85			}
86	torben	925
87			File files[] = root.listFiles( new ExtensionFilter("jpg") );
88	torben	1222
89	torben	912
90	torben	1222	for (File f : files) {
91	torben	1185	ImageEntry entry = new ImageEntry();
92			entry.path = f.getPath();
93	torben	1013
94	torben	1222	entry.thumb = generateAndLoadThumb(f);
95
96	torben	1013
97	torben	1185	/* 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	torben	1013	}
109
110	torben	1185	Collections.sort(mImages, new ImageEntry.PathComparator() );
111
112			thumbSize = getSize();
113	torben	790	}
114	torben	1185
115	torben	1212	public void cleanUp() {
116			mImages.clear();
117			}
118
119	torben	1185	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	torben	790
130			public int getCount() {
131	torben	1185	return mImages.size();
132	torben	790	}
133
134			public Object getItem(int position) {
135			return position;
136			}
137
138			public long getItemId(int position) {
139			return position;
140			}
141
142	torben	1185	public ImageEntry getImageEntry(int position) {
143			return mImages.get(position);
144	torben	790	}
145	torben	915
146	torben	1185	public ArrayList<ImageEntry> getImages() {
147			return mImages;
148	torben	925	}
149
150	torben	915	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	torben	790
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	torben	1185	imageView.setLayoutParams(new GridView.LayoutParams(thumbSize, thumbSize));
166	torben	790	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	torben	1013	//imageView.setImageURI( Uri.parse(mThumbPaths.get(position)) );
174	torben	1185	imageView.setImageBitmap( mImages.get(position).thumb );
175	torben	790	return imageView;
176	torben	925	}
177
178	torben	1185	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	torben	1186	raf.readFully(buf);
185			raf.close();
186
187	torben	1185	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	torben	925	class ExtensionFilter implements FilenameFilter {
208			private String mExt;
209			public ExtensionFilter(String ext) {
210			mExt = ext;
211			}
212	torben	790
213	torben	925	@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	torben	790	}
226			}