我想在其中添加一些圖像，一切都很好（圖像添加），但是當我想刪除圖像時，它正在工作并刪除圖像，但它刪除了最后一個圖像而不是我想刪除的特定圖像，我不知道如何獲取特定圖像的位置并刪除它。public class PhotoAdd_Adapter extends PagerAdapter { private LayoutInflater inflater; private Context context; ArrayList<String> mylist; SharedPreferences sharedPreferences; JSONArray responsearray = null; private static final String TAG_PHOTO_ONE = "Gallery_Full"; HashMap<String, String> get; LinearLayout addimages; String ImageID; ProgressBar progressBar; String finalimgpath, imageId; ImageView imageView, deletebtn; TextView no_image, p_id; private FragmentManager f_manager; int delPosition; public PhotoAdd_Adapter(Context context, ArrayList<String> mylist, FragmentManager f_manager) { this.f_manager = f_manager; this.context = context; this.mylist = mylist; inflater = LayoutInflater.from(context); sharedPreferences = context.getSharedPreferences(context.getString(R.string.prefs), 0); } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object); } @Override public int getCount() { return mylist.size(); } @Override public int getItemPosition(@NonNull Object object) { if(mylist.contains(object)){ return mylist.indexOf(object); }else { return POSITION_NONE; }// return super.getItemPosition(object);// return PagerAdapter.POSITION_NONE; }
2 回答
慕的地10843
TA貢獻1785條經驗 獲得超8個贊
您的問題是視圖尋呼機在刪除圖像任務完成之前重新加載。因此，將加載相同的圖像集，但由于列表大小已被修改，因此不會加載最后一個圖像。
解決方案：等待刪除操作完成，然后再在視圖頁程序上調用通知數據集更改（）
湖上湖
TA貢獻2003條經驗 獲得超2個贊
我已經更新了你的代碼，只是試試下面的代碼：
public class PhotoAdd_Adapter extends PagerAdapter {
private LayoutInflater inflater;
private Context context;
ArrayList<String> mylist;
SharedPreferences sharedPreferences;
JSONArray responsearray = null;
private static final String TAG_PHOTO_ONE = "Gallery_Full";
HashMap<String, String> get;
LinearLayout addimages;
String ImageID;
ProgressBar progressBar;
String finalimgpath, imageId;
ImageView imageView, deletebtn;
TextView no_image, p_id;
private FragmentManager f_manager;
int delPosition;
public PhotoAdd_Adapter(Context context, ArrayList<String> mylist, FragmentManager f_manager) {
this.f_manager = f_manager;
this.context = context;
this.mylist = mylist;
inflater = LayoutInflater.from(context);
sharedPreferences = context.getSharedPreferences(context.getString(R.string.prefs), 0);
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
@Override
public int getCount() {
return mylist.size();
}
@Override
public int getItemPosition(@NonNull Object object) {
if(mylist.contains(object)){
return mylist.indexOf(object);
}else {
return POSITION_NONE;
}
// return super.getItemPosition(object);
// return PagerAdapter.POSITION_NONE;
}
@Override
public Object instantiateItem(ViewGroup view, final int position) {
View imageLayout = inflater.inflate(R.layout.photoadd_adapter, view, false);
assert imageLayout != null;
imageView = imageLayout.findViewById(R.id.image_adapter);
deletebtn = imageLayout.findViewById(R.id.deletebtn);
p_id = imageLayout.findViewById(R.id.p_id);
this.delPosition = position;
String test = String.valueOf(mylist.get(position));
String finalimgpaths = context.getString(R.string.moreimgpath) + test;
Glide.with(context)
.load(finalimgpaths)
.into(imageView);
view.addView(imageLayout, 0);
deletebtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// showDialogBox();
imageId = ImageID;
Log.e("IMAGEIDONE", imageId);
responsearray = responsearray(responsearray, position);
new DeleteImage().execute(true);
}
});
return imageLayout;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view.equals(object);
}
@Override
public void restoreState(Parcelable state, ClassLoader loader) {
}
@Override
public Parcelable saveState() {
return null;
}
class DeleteImage extends AsyncTask<Boolean, Void, String> {
@Override
protected String doInBackground(Boolean... booleans) {
ProfileApi profileApi = new ProfileApi();
String result = null;
try {
Log.e("IMAGEID", ImageID);
result = profileApi.deleteImage(sharedPreferences.getString("id", ""), imageId);
Log.e("DELETERESULT", result);
JSONObject object = new JSONObject(result);
if (object.getString("error").equalsIgnoreCase("false")) {
return "true";
} else {
String errormsg = object.getString("response");
return errormsg;
}
} catch (ApiException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String s) {
// ad.hide();
super.onPostExecute(s);
try {
if (s != null) {
Toast.makeText(context, "Image Deleted",Toast.LENGTH_SHORT).show();
mylist.remove(position);
notifyDataSetChanged();
}
} catch (IllegalStateException e) {
e.printStackTrace();
}
}
}
public static JSONArray responsearray(JSONArray jarray, int pos) {
JSONArray Njarray = new JSONArray();
try {
for (int i = 0; i < jarray.length(); i++) {
if (i != pos)
Njarray.put(jarray.get(i));
}
} catch (Exception e) {
e.printStackTrace();
}
return Njarray;
}
}
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