thoerup/side9/ImageAdapter.java

package dk.thoerup.side9;

import java.io.File;
import java.io.FilenameFilter;
import java.util.ArrayList;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Environment;
import android.util.DisplayMetrics;
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") );
        
        for (File f : files) {          
            Bitmap bmp = BitmapFactory.decodeFile( f.getPath() );
            Bitmap scaled =  Bitmap.createScaledBitmap(bmp, bmp.getWidth()/4, bmp.getHeight()/4, true);
            
                mBitmapPaths.add(  f.getPath() );
                mBitmaps.add(scaled);
        }
        
        size = getSize();
    }

    public int getCount() {
        return mBitmaps.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.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.FilenameFilter;
5	import java.util.ArrayList;
6
7	import android.content.Context;
8	import android.graphics.Bitmap;
9	import android.graphics.BitmapFactory;
10	import android.os.Environment;
11	import android.util.DisplayMetrics;
12	import android.view.View;
13	import android.view.ViewGroup;
14	import android.view.WindowManager;
15	import android.widget.BaseAdapter;
16	import android.widget.GridView;
17	import android.widget.ImageView;
18	import android.widget.Toast;
19
20	public class ImageAdapter extends BaseAdapter {
21	//int mGalleryItemBackground;
22	private Context mContext;
23
24	ArrayList<String> mBitmapPaths = new ArrayList<String>();
25	ArrayList<Bitmap> mBitmaps = new ArrayList<Bitmap>();
26
27	int size;
28
29	public ImageAdapter(Context c) {
30	mContext = c;
31
32	String path = Environment.getExternalStorageDirectory().getPath() + "/Side9" ;
33
34
35
36	File root = new File(path);
37
38	if (root.exists() == false) {
39	Toast.makeText(mContext, "Side9 folder not found on sdcard", Toast.LENGTH_LONG).show();
40	return;
41	}
42
43	File files[] = root.listFiles( new ExtensionFilter("jpg") );
44
45	for (File f : files) {
46	Bitmap bmp = BitmapFactory.decodeFile( f.getPath() );
47	Bitmap scaled = Bitmap.createScaledBitmap(bmp, bmp.getWidth()/4, bmp.getHeight()/4, true);
48
49	mBitmapPaths.add( f.getPath() );
50	mBitmaps.add(scaled);
51	}
52
53	size = getSize();
54	}
55
56	public int getCount() {
57	return mBitmaps.size();
58	}
59
60	public Object getItem(int position) {
61	return position;
62	}
63
64	public long getItemId(int position) {
65	return position;
66	}
67
68	public String getImagePath(int position) {
69	return mBitmapPaths.get(position);
70	}
71
72	public ArrayList<String> getImagePaths() {
73	return mBitmapPaths;
74	}
75
76	private int getSize() {
77	DisplayMetrics metrics = new DisplayMetrics();
78	WindowManager wmgr = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
79	wmgr.getDefaultDisplay().getMetrics(metrics);
80	if (metrics.widthPixels < 480) {
81	return 150;
82	} else {
83	return 200;
84	}
85	}
86
87	public View getView(int position, View convertView, ViewGroup parent) {
88	ImageView imageView;
89	if (convertView == null) { // if it's not recycled, initialize some attributes
90	imageView = new ImageView(mContext);
91	imageView.setLayoutParams(new GridView.LayoutParams(size, size));
92	imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
93	imageView.setAdjustViewBounds(true);
94	imageView.setPadding(4, 4, 4, 4);
95	} else {
96	imageView = (ImageView) convertView;
97	}
98
99
100	imageView.setImageBitmap( mBitmaps.get(position) );
101	return imageView;
102	}
103
104	class ExtensionFilter implements FilenameFilter {
105	private String mExt;
106	public ExtensionFilter(String ext) {
107	mExt = ext;
108	}
109
110	@Override
111	public boolean accept(File dir, String filename) {
112	String parts[] = filename.split("\\.");
113	if (parts.length > 1) {
114	String ext = parts[ parts.length -1];
115	if (ext.equals(mExt)) {
116	return true;
117	}
118	}
119	return false;
120	}
121
122	}
123	}