GridView实现一行显示并左右滚动
使用GridView达到Gallery效果[html] view plaincopy

1. <?xml version="1.0" encoding="utf-8"?>
2. <!-- res/layout/gridview_to_gallery.xml -->
3. <HorizontalScrollView xmlns:android="http://schemas.android.com/apk/res/android"
4. android:layout_width="fill_parent"
5. android:layout_height="wrap_content"
6. android:scrollbars="none">
7. <LinearLayout
8. android:layout_width="fill_parent"
9. android:layout_height="fill_parent"
10. android:orientation="horizontal">
11. <GridView android:id="@+id/grid"
12. android:layout_width="1300dp"
13. android:layout_height="fill_parent"
14. android:gravity="center"
15. android:columnWidth="100dip"
16. android:horizontalSpacing="10dip"
17. android:verticalSpacing="10dip"/>
18. </LinearLayout>
19. </HorizontalScrollView>

[java] view plaincopy

1. public class GridViewDemo extends Activity {
2. @Override
3. public void onCreate(Bundle savedInstanceState) {
4. super.onCreate(savedInstanceState);
5. setContentView(R.layout.gridview_to_gallery);
7. GridView gridview = (GridView) findViewById(R.id.grid);
8. ImageAdapter adapter = new ImageAdapter(this);//一个继承BaseAdapter的自定义适配器
9. adapter.setImages(getImages());
10. gridview.setAdapter(adapter);
11. gridview.setNumColumns(adapter.getCount());
13. gridview.setOnItemClickListener(new OnItemClickListener() {
14. @Override
15. public void onItemClick(AdapterView<?> av, View v, int position, long id) {
16. Toast.makeText(GridViewDemo.this, "" + position, Toast.LENGTH_SHORT).show();
17. }
18. });
19. }
20. /**
21. * 取出SD卡中的图片（也可改为取网络或数据库图片）
22. * @return
23. */
24. private List<Bitmap> getImages() {
25. List<Bitmap> list = new ArrayList<Bitmap>();
26. for (int i=1; i<=12; i++) {
27. String imagePath = "/sdcard/image_0"+i+".jpg";
28. if (i >= 10) imagePath = "/sdcard/image_"+i+".jpg";
29. list.add(BitmapFactory.decodeFile(imagePath));
30. }
31. return list;
32. }
33. }

自定义适配器

[java] view plaincopy

1. public class ImageAdapter extends BaseAdapter {
2. private Context mContext;
3. private List<Bitmap> images = new ArrayList<Bitmap>();
5. public ImageAdapter(Context c) {
6. mContext = c;
7. }
9. public List<Bitmap> getImages() {
10. return images;
11. }
12. public void setImages(List<Bitmap> images) {
13. this.images = images;
14. }
16. public int getCount() {
17. return images.size();
18. }
20. public Object getItem(int position) {
21. return images.get(position);
22. }
24. public long getItemId(int position) {
25. return 0;
26. }
28. // create a new ImageView for each item referenced by the Adapter
29. public View getView(int position, View convertView, ViewGroup parent) {
30. ImageView imageView;
31. if (convertView == null) { // if it's not recycled, initialize some attributes
32. imageView = new ImageView(mContext);
33. imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
34. imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
35. imageView.setPadding(8, 8, 8, 8);
36. } else {
37. imageView = (ImageView) convertView;
38. }
40. imageView.setImageBitmap(images.get(position));
41. return imageView;
42. }
43. }