这是我用来在gridview中显示画廊但在gridview中显示所有图片的代码
示例链接 1图像，但我想显示这样的画廊
文件夹视图，所以当用户单击任何文件夹时，它的内容会显示在 gridview 中，我该怎么办？
这是我的代码。
公共类 AndroidCustomGalleryActivity 扩展 Activity {
私人整数计数；
私有 Bitmap[] 缩略图；
私人布尔[]缩略图选择；
私有字符串[] arrPath；
私有图像适配器图像适配器；
Cursor imagecursor;
int image_column_index;
Button selectBtn;
ProgressDialog myProgressDialog = null;
DataBase db;
Handler handle = new Handler(){
public void handleMessage(android.os.Message msg) {
if (msg.what == 1)
{
hideProgress();
GridView imagegrid = (GridView) findViewById
(R.id.PhoneImageGrid);
imageAdapter = new ImageAdapter();
imagegrid.setAdapter(imageAdapter);
}
else if (msg.what == 3)
{
hideProgress();
AndroidCustomGalleryActivity.this.finish();
}
else if (msg.what == 2)
{
hideProgress();
}
super.handleMessage(msg);
};
};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gallery);
showProgress();
new Thread() {
public void run() {
try
{
loadFeed();
android.os.Message alertMessage = new android.os.Message();
alertMessage.what = 1;
handle.sendMessage(alertMessage);
}
catch(Exception e)
{
android.os.Message alertMessage = new android.os.Message();
alertMessage.what = 2;
handle.sendMessage(alertMessage);
}
}
}.start();
selectBtn = (Button) findViewById(R.id.selectBtn);
selectBtn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
showProgress();
new Thread() {
public void run() {
try
{
SelecedtPhotos();
android.os.Message alertMessage = new
android.os.Message();
alertMessage.what = 3;
handle.sendMessage(alertMessage);
}
catch(Exception e)
{
android.os.Message alertMessage = new
android.os.Message();
alertMessage.what = 2;
handle.sendMessage(alertMessage);
}
}
}.start();
}
});
}
public static byte[] getBitmapAsByteArray(Bitmap bitmap) {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.PNG, 0, outputStream);
return outputStream.toByteArray();
}
public class ImageAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public ImageAdapter() {
mInflater = (LayoutInflater) getSystemService
(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return count;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.galleryitem,
null);
holder.imageview = (ImageView)
convertView.findViewById
(R.id.thumbImage);
holder.checkbox = (CheckBox) convertView.findViewById
(R.id.itemCheckBox);
convertView.setTag(holder);
}
else
{
holder = (ViewHolder) convertView.getTag();
}
holder.checkbox.setId(position);
holder.imageview.setId(position);
holder.checkbox.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
CheckBox cb = (CheckBox) v;
int id = cb.getId();
if (thumbnailsselection[id])
{
cb.setChecked(false);
thumbnailsselection[id] = false;
}
else
{
cb.setChecked(true);
thumbnailsselection[id] = true;
}
}
});
/*holder.imageview.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
int id = v.getId();
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file://" +
arrPath[id]), "image/*");
startActivity(intent);
}
});*/
holder.imageview.setImageBitmap(thumbnails[position]);
holder.checkbox.setChecked(thumbnailsselection[position]);
holder.id = position;
return convertView;
}
}
class ViewHolder {
ImageView imageview;
CheckBox checkbox;
int id;
}
public void loadFeed()
{
final String[] columns = { MediaStore.Images.Media.DATA,
MediaStore.Images.Media._ID };
final String orderBy = MediaStore.Images.Media._ID;
imagecursor = managedQuery
(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
columns, null,null, orderBy);
image_column_index = imagecursor.getColumnIndex
(MediaStore.Images.Media._ID);
this.count = imagecursor.getCount();
this.thumbnails = new Bitmap[this.count];
this.arrPath = new String[this.count];
this.thumbnailsselection = new boolean[this.count];
for (int i = 0; i < this.count; i++)
{
imagecursor.moveToPosition(i);
int id = imagecursor.getInt(image_column_index);
int dataColumnIndex = imagecursor.getColumnIndex
(MediaStore.Images.Media.DATA);
thumbnails[i] = MediaStore.Images.Thumbnails.getThumbnail
(getApplicationContext().getContentResolver(),
id,MediaStore.Images.Thumbnails.MICRO_KIND,
null);
arrPath[i]= imagecursor.getString(dataColumnIndex);
}