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我在我的android应用程序中有一个工作的自定义相机和图库视图。我的照相机将图片与时间戳保存在一个特定的文件夹中,我已成功显示在我的画廊中。它似乎将这些图像默认排序从最旧到最新或按字母顺序排列,不确定..但我希望它们以相反的顺序显示..有人可以指引我朝着正确的方向吗?可能吗?改变我的BaseAdapter或我的我的画廊活动的OnCreate ...有没有一种方法来在图库中按日期排序图像android
我的画廊活动:
public class GalleryView extends Activity{
ImageView imageView;
Cursor cursor;
private int columnIndex;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gallery);
Gallery ga = (Gallery)findViewById(R.id.Gallery01);
// Set up an array of the Thumbnail Image ID column we want
String[] projection = {MediaStore.Images.Media._ID};
// Create the cursor pointing to the SDCard
cursor = managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
projection, // Which columns to return
MediaStore.Images.Media.DATA + " like ? ",
new String[] {"%LC/images%"},
null);
// Get the column index of the Thumbnails Image ID
columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media._ID);
ga.setAdapter(new GallImageAdapter(this,cursor,columnIndex));
}
}
我的自定义适配器:
public class GallImageAdapter extends BaseAdapter {
public Cursor cursor;
private int columnIndex;
private Context context;
int imageBackground;
public GallImageAdapter(Context ctx, Cursor cur, int cIn) {
context = ctx;
columnIndex = cIn;
cursor = cur;
}
@Override
public int getCount() {
return cursor.getCount();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v;
if(convertView ==null){
v = LayoutInflater.from(context).inflate(R.layout.galitem, parent, false);
}else{
v = convertView;
}
ImageView photo = (ImageView) v.findViewById(R.id.imageView);
ImageView border = (ImageView) v.findViewById(R.id.borderView);
ImageView d = (ImageView) v.findViewById(R.id.delView);
// Move cursor to current position
cursor.moveToPosition(position);
// Get the current value for the requested column
int imageID = cursor.getInt(columnIndex);
// obtain the image URI
Uri uri = Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, Integer.toString(imageID));
String url = uri.toString();
// Set the content of the image based on the image URI
int originalImageId = Integer.parseInt(url.substring(url.lastIndexOf("/") + 1, url.length()));
Bitmap b = MediaStore.Images.Thumbnails.getThumbnail(context.getContentResolver(),
originalImageId, MediaStore.Images.Thumbnails.MINI_KIND, null);
photo.setImageBitmap(b);
photo.setScaleType(ImageView.ScaleType.FIT_CENTER);
return v;
}
}