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.util.ArrayList;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Bitmap.CompressFormat;
import android.net.Uri;
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 {
    //int mGalleryItemBackground;
    private Context mContext;
    
    ArrayList<String> mBitmapPaths = new ArrayList<String>();
    ArrayList<Bitmap> mBitmaps = new ArrayList<Bitmap>();
    
    int size;

    public ImageAdapter(Context c) {
        mContext = c;
        
        String path = Environment.getExternalStorageDirectory().getPath() + "/Side9" ;
        
        
        
        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") );
        

        String thumbPath =  path + "/.thumb/";
        
        File thumbDir = new File(thumbPath);
        if (! thumbDir.exists()) {
                thumbDir.mkdirs();
        }
        
        
        for (File f : files) {

                String fileName = f.getName();
                File thumb = new File ( thumbPath + fileName );
                
                if (! thumb.exists() || thumb.lastModified() < f.lastModified()) {
                        Bitmap bmp = BitmapFactory.decodeFile( f.getPath() );
                        Bitmap scaled =  Bitmap.createScaledBitmap(bmp, bmp.getWidth()/4, bmp.getHeight()/4, true);
                        mBitmaps.add(scaled);
                        try {
                                FileOutputStream fos = new FileOutputStream(thumb);
                                scaled.compress(CompressFormat.JPEG, 90, fos);                          
                                
                        } catch (IOException e) {
                                Log.e("Side9", "error", e);
                        }
                        
                } else {
                        Bitmap thumbBmp = BitmapFactory.decodeFile( thumb.getPath());
                        mBitmaps.add(thumbBmp);
                }
                        mBitmapPaths.add(  f.getPath() );            
                
        }
        
        size = getSize();
    }

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

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

    public long getItemId(int position) {
        return position;
    }
    
    public String getImagePath(int position) {
        return mBitmapPaths.get(position);
    }
    
    public ArrayList<String> getImagePaths() {
        return mBitmapPaths;
    }
    
    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(size, size));
            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( mBitmaps.get(position) );
        return imageView;
    }
    
    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.util.ArrayList;
8
9	import android.content.Context;
10	import android.graphics.Bitmap;
11	import android.graphics.BitmapFactory;
12	import android.graphics.Bitmap.CompressFormat;
13	import android.net.Uri;
14	import android.os.Environment;
15	import android.util.DisplayMetrics;
16	import android.util.Log;
17	import android.view.View;
18	import android.view.ViewGroup;
19	import android.view.WindowManager;
20	import android.widget.BaseAdapter;
21	import android.widget.GridView;
22	import android.widget.ImageView;
23	import android.widget.Toast;
24
25	public class ImageAdapter extends BaseAdapter {
26	//int mGalleryItemBackground;
27	private Context mContext;
28
29	ArrayList<String> mBitmapPaths = new ArrayList<String>();
30	ArrayList<Bitmap> mBitmaps = new ArrayList<Bitmap>();
31
32	int size;
33
34	public ImageAdapter(Context c) {
35	mContext = c;
36
37	String path = Environment.getExternalStorageDirectory().getPath() + "/Side9" ;
38
39
40
41	File root = new File(path);
42
43	if (root.exists() == false) {
44	Toast.makeText(mContext, "Side9 folder not found on sdcard", Toast.LENGTH_LONG).show();
45	return;
46	}
47
48	File files[] = root.listFiles( new ExtensionFilter("jpg") );
49
50
51	String thumbPath = path + "/.thumb/";
52
53	File thumbDir = new File(thumbPath);
54	if (! thumbDir.exists()) {
55	thumbDir.mkdirs();
56	}
57
58
59	for (File f : files) {
60
61	String fileName = f.getName();
62	File thumb = new File ( thumbPath + fileName );
63
64	if (! thumb.exists() \|\| thumb.lastModified() < f.lastModified()) {
65	Bitmap bmp = BitmapFactory.decodeFile( f.getPath() );
66	Bitmap scaled = Bitmap.createScaledBitmap(bmp, bmp.getWidth()/4, bmp.getHeight()/4, true);
67	mBitmaps.add(scaled);
68	try {
69	FileOutputStream fos = new FileOutputStream(thumb);
70	scaled.compress(CompressFormat.JPEG, 90, fos);
71
72	} catch (IOException e) {
73	Log.e("Side9", "error", e);
74	}
75
76	} else {
77	Bitmap thumbBmp = BitmapFactory.decodeFile( thumb.getPath());
78	mBitmaps.add(thumbBmp);
79	}
80	mBitmapPaths.add( f.getPath() );
81
82	}
83
84	size = getSize();
85	}
86
87	public int getCount() {
88	return mBitmapPaths.size();
89	}
90
91	public Object getItem(int position) {
92	return position;
93	}
94
95	public long getItemId(int position) {
96	return position;
97	}
98
99	public String getImagePath(int position) {
100	return mBitmapPaths.get(position);
101	}
102
103	public ArrayList<String> getImagePaths() {
104	return mBitmapPaths;
105	}
106
107	private int getSize() {
108	DisplayMetrics metrics = new DisplayMetrics();
109	WindowManager wmgr = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
110	wmgr.getDefaultDisplay().getMetrics(metrics);
111	if (metrics.widthPixels < 480) {
112	return 150;
113	} else {
114	return 200;
115	}
116	}
117
118	public View getView(int position, View convertView, ViewGroup parent) {
119	ImageView imageView;
120	if (convertView == null) { // if it's not recycled, initialize some attributes
121	imageView = new ImageView(mContext);
122	imageView.setLayoutParams(new GridView.LayoutParams(size, size));
123	imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
124	imageView.setAdjustViewBounds(true);
125	imageView.setPadding(4, 4, 4, 4);
126	} else {
127	imageView = (ImageView) convertView;
128	}
129
130	//imageView.setImageURI( Uri.parse(mThumbPaths.get(position)) );
131	imageView.setImageBitmap( mBitmaps.get(position) );
132	return imageView;
133	}
134
135	class ExtensionFilter implements FilenameFilter {
136	private String mExt;
137	public ExtensionFilter(String ext) {
138	mExt = ext;
139	}
140
141	@Override
142	public boolean accept(File dir, String filename) {
143	String parts[] = filename.split("\\.");
144	if (parts.length > 1) {
145	String ext = parts[ parts.length -1];
146	if (ext.equals(mExt)) {
147	return true;
148	}
149	}
150	return false;
151	}
152
153	}
154	}