我想从图库中选择一些图像并在gridview中显示。我使用了Filepicker库。它的工作,但我面临的mai问题是选择后在gridview中没有显示图像。我给你看我的代码。请帮我。
这是我的片段课
fabPhotosAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
FilePickerBuilder.getInstance().setSelectedFiles(arrayList)
.setActivityTheme(R.style.Theme_AppCompat_Light).pickPhoto(getActivity());
}
});
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case FilePickerConst.REQUEST_CODE:
if (resultCode == RESULT_OK && data != null) {
arrayList = data.getStringArrayListExtra(FilePickerConst.KEY_SELECTED_PHOTOS);
PhotoFragmentModel model;
ArrayList<PhotoFragmentModel> list = new ArrayList<>();
try {
for (String path : arrayList) {
model = new PhotoFragmentModel();
model.setName(path.substring(path.lastIndexOf("/") + 1));
model.setUri(Uri.fromFile(new File(path)));
list.add(model);
}
gridPhotos.setAdapter(new PhotoFragmentAdapter(getActivity(), list));
Toast.makeText(getActivity(), "Total : " + String.valueOf(list.size()), Toast.LENGTH_SHORT).show();
} catch (Exception e) {
}
}
}
}
PhotoFragmentAdapter.java
public class PhotoFragmentAdapter extends BaseAdapter {
private Context context;
private ArrayList<PhotoFragmentModel> arrayList;
private LayoutInflater inflater;
private ImageView ivPhoto;
private TextView tvName;
public PhotoFragmentAdapter(Context context, ArrayList<PhotoFragmentModel> arrayList) {
this.context = context;
this.arrayList = arrayList;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return arrayList.size();
}
@Override
public Object getItem(int i) {
return arrayList.get(i);
}
@Override
public long getItemId(int i) {
return i;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
view = inflater.inflate(R.layout.item_photo_fragment, null);
final PhotoFragmentModel model = (PhotoFragmentModel) this.getItem(i);
ivPhoto = (ImageView) view.findViewById(R.id.iv_item_photo);
tvName = (TextView) view.findViewById(R.id.tv_item_name);
Picasso.with(context).load(model.getUri()).fit().into(ivPhoto);
tvName.setText(model.getName());
return view;
}
}
选择工作正常,但选择后图像未在gridview中显示。这是主要问题。如果有人可以帮助我或指导我其他图书馆,我将感谢他。
最佳答案
model.setUri(Uri.fromFile(new File(path)));
如果文件夹的特殊字符无法解决这一问题。
尝试这个
model.setUri(Uri.fromFile(new File(getPath(uri)));
public String getPath(Uri uri)
{
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(uri, projection, null, null, null);
if (cursor == null) return null;
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String s=cursor.getString(column_index);
cursor.close();
return s;
}
哦,现在我明白了,不工作的主要原因是
final PhotoFragmentModel model = (PhotoFragmentModel) this.getItem(i);
您可以直接调用索引的arraylist项目
Picasso.with(context).load(arrayList.get(i).getUri()).fit().into(ivPhoto);
关于android - 如何在Android的GridView中添加选定的图像,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/46661521/