1. @Override
2. public void onCreate(Bundle savedInstanceState) {
3. super.onCreate(savedInstanceState);
4. setContentView(R.layout.grid_2);
5. GridView g = (GridView) findViewById(R.id.myGrid);
6. g.setAdapter(new ImageAdapter(this));
7. }

1. public class ImageAdapter extends BaseAdapter {
2. public ImageAdapter(Context c) {
3. mContext = c;
4. }
5. public int getCount() {
6. return mThumbIds.length;
7. }
8. public Object getItem(int position) {
9. return position;
10. }
11. public long getItemId(int position) {
12. return position;
13. }
14. public View getView(int position, View convertView, ViewGroup parent) {
15. ImageView imageView;
16. if (convertView == null) {
17. imageView = new ImageView(mContext);
18. imageView.setLayoutParams(new GridView.LayoutParams(45, 45));//设置ImageView宽高
19. imageView.setAdjustViewBounds(false);
20. imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
21. imageView.setPadding(8, 8, 8, 8);
22. } else {
23. imageView = (ImageView) convertView;
24. }
25. imageView.setImageResource(mThumbIds[position]);
26. return imageView;
27. }
28. private Context mContext;
29. private Integer[] mThumbIds = {
30. R.drawable.sample_thumb_0, R.drawable.sample_thumb_1,
31. R.drawable.sample_thumb_2, R.drawable.sample_thumb_3,
32. R.drawable.sample_thumb_4, R.drawable.sample_thumb_5,
33. R.drawable.sample_thumb_6, R.drawable.sample_thumb_7
34. };
35. }

1. <?xml version="1.0" encoding="utf-8"?>
2. <GridView xmlns:android="http://schemas.android.com/apk/res/android"
3. android:id="@+id/myGrid"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent"
6. android:padding="10dp"
7. android:verticalSpacing="10dp"
8. android:horizontalSpacing="10dp"
9. android:numColumns="auto_fit"
10. android:columnWidth="60dp"
11. android:stretchMode="columnWidth"
12. android:gravity="center"
13. />

1. //获得Bitmap的高和宽
2. int bmpWidth=bmp.getWidth();
3. int bmpHeight=bmp.getHeight();
4. //设置缩小比例
5. double scale=0.8;
6. //计算出这次要缩小的比例
7. scaleWidth=(float)(scaleWidth*scale);
8. scaleHeight=(float)(scaleHeight*scale);
9. //产生resize后的Bitmap对象
10. Matrix matrix=new Matrix();
11. matrix.postScale(scaleWidth, scaleHeight);
12. Bitmap resizeBmp=Bitmap.createBitmap(bmp, 0, 0, bmpWidth, bmpHeight, matrix, true);

1. <ImageView
2. android:id="@+id/image"
3. android:layout_width="fill_parent"
4. android:layout_height="fill_parent"
5. android:scaleType="center"
6. android:src="@drawable/candle"
7. />