I have the following code in eclipse and i can't put the correct layout and imageview because cannot be resolved or are not a field
public ViewPagerAdapter(Context context, String[] gallery) {
this.context = context;
this.gallery = gallery;
}
#Override
public int getCount() {
return gallery.length;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.viewpager_item, container,
false);
// Locate the TextViews in viewpager_item.xml
ImageView imgflag = (ImageView) itemView.findViewById(R.id.image);
Picasso.with(context).load(gallery[position]).into(imgflag);
((ViewPager) container).addView(itemView);
return itemView;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
// Remove viewpager_item.xml from ViewPager
((ViewPager) container).removeView((View) object);
}
I tried cleanning the project importing R, and making rigth click in my project/"Android tools"/"Fix project properties".
I have this problem only when i create an adapter class
Try to use group of key Ctr + Shift + o to let eclipse auto import neccessary things for your project.
Related
i want know why getview() function is not call
maybe override is wrong?
i want make custom listlayout
what's wrong in listviewadapter?
public class ListViewAdapter extends BaseAdapter {
private Context mContext;
private ArrayList<Word> items;
public ListViewAdapter(Context mContext, ArrayList<Word> items) {
this.mContext = mContext;
this.items = items;
}
#Override
public int getCount() {
return items.size();
}
#Override
public Object getItem(int i) {
return items.get(i);
}
#Override
public long getItemId(int i) {
return i;
}
#Override
public View getView(int i, View view, ViewGroup viewGroup) {
if (view == null) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.wordlist_layout, viewGroup, false);
}
TextView wordview1 = view.findViewById(R.id.wordView1);
System.out.println("wordlist layout = " + items.get(i).w1);
wordview1.setText(items.get(i).w1);
return view;
}
// this is my Main activity code
private ArrayList<Word> items;
private ListViewAdapter listviewadapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn = findViewById(R.id.submit_Button);
btn.setOnClickListener(view -> {
ListView word_listview = findViewById(R.id.Wordle_Word_List);
items = new ArrayList<Word>();
items.add(new Word('a'));
listviewadapter = new ListViewAdapter(getApplicationContext(), items);
word_listview.setAdapter(listviewadapter);
});
}
i dont know what is missing in my code
In ListviewAdapter I dont know why getview() function not call
I think your problem is the condition in its body, not the whole function. There is no need to check if it is null or not. you can simply inflate the view as mentioned in this article:
#Override
public View getView(int i, View view, ViewGroup viewGroup) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.wordlist_layout, viewGroup, false);
TextView wordview1 = view.findViewById(R.id.wordView1);
System.out.println("wordlist layout = " + items.get(i).w1);
wordview1.setText(items.get(i).w1);
return view;
}
#Override
public View getView(int i, View view, ViewGroup viewGroup) {
view = LayoutInflater.from(mContext).inflate(R.layout.wordlist_layout, viewGroup, false);
TextView wordview1 = view.findViewById(R.id.wordView1);
wordview1.setText(items.get(i).w1);
return view;
}
NavigationTabBar View Pager with Tab.
Github Link
I want to set Fragments in the viewpager but I'm not getting any far with what I'm doing might be because I'm naive in Android. Though I'm attaching code they used in exapmle application.Though I know ViwPager will handle the job. Can any one help me out where I have to call the Fragment and What code I should put in Fragment Class.
final ViewPager viewPager = (ViewPager) findViewById(R.id.vp_horizontal_ntb);
viewPager.setAdapter(new PagerAdapter() {
#Override
public int getCount() {
return 5;
}
#Override
public boolean isViewFromObject(View view, Object o) {
return view.equals(o);
}
#Override
public void destroyItem(final View container, final int position, final Object object) {
((ViewPager) container).removeView((View) object);
}
#Override
public Object instantiateItem(final ViewGroup container, final int position) {
Log.d("Page ", Integer.toString(position));
final View view = LayoutInflater.from(
getBaseContext()).inflate(R.layout.item_vp, null, false);
final TextView txtPage = (TextView)view.findViewById(R.id.txt_vp_item_page);
txtPage.setText(String.format("Page #%d", position));
container.addView(view);
return view;
}
});
My application gets all images URL from server and saves that to an ArrayList and displays these images in ViewPager. But it generates a IllegalStateException. Adapter given below:
public class FullScreenImageAdapter extends PagerAdapter {
private Context _activity;
private ArrayList<String> _imagePaths;
private LayoutInflater inflater;
// constructor
public FullScreenImageAdapter(Context activity,
ArrayList<String> imagePaths) {
this._activity = activity;
this._imagePaths = imagePaths;
}
#Override
public int getCount() {
return this._imagePaths.size();
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView imgDisplay;
inflater = (LayoutInflater) _activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View viewLayout = inflater.inflate(R.layout.item, container,
false);
imgDisplay = (ImageView) viewLayout.findViewById(R.id.cardImage);
Picasso.with(_activity).load(_imagePaths.get(position)).into(imgDisplay);
((ViewPager) container).addView(viewLayout, 0);
return viewLayout;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((ImageView) object);
}
}
Adapter created as
FullScreenImageAdapter adapter=new FullScreenImageAdapter(FullScreenActivity.this,all_url);
viewPager.setAdapter(adapter);
And the log looks like below:
java.lang.IllegalStateException: The application's PagerAdapter
> changed the adapter's contents without calling
> PagerAdapter#notifyDataSetChanged! Expected adapter item count: 1,
> found: 3 Pager id: com.wat.clickzy:id/view_pager Pager class: class
> android.support.v4.view.ViewPager Problematic adapter: class
> com.wat.clickzy.FullScreenImageAdapter
Please help me
You need to call notifysetdatachanged on the adapter that you're using, every time you're adding/removing something to that adapter.
Look here for even more clarity.
Im trying to add a listview inside a fragment witch is also inside a tabhost. the app is not crashing or anything, but the list view is not showing anything.
Here is my code:
Class for the tabPager
public class TabPagerAdapter extends FragmentPagerAdapter {
public TabPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int index) {
switch (index) {
case 0:
return new FragmentHome();
case 1:
return new FragmentBadges();
case 2:
return new FragmentBenefits();
}
return null;
}
Following is the fragment where I want the listview:
public class FragmentBadges extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_badges_list, null);
BadgesListAdapter adapter = new BadgesListAdapter(this.getActivity(), getCurrentBadges());
ListView badgeslist = (ListView) rootView.findViewById(R.id.badges_list);
badgeslist.setAdapter(adapter);
badgeslist.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
//TODO do some
}
});
return rootView;
}
And following is the adapter:
public class BadgesListAdapter extends ArrayAdapter<String> {
private final Activity context;
private List<Badge> badges;
public BadgesListAdapter(Activity context, List<Badge> badges) {
super(context, R.layout.fragment_badges_listrow);
this.context = context;
this.badges = badges;
}
#Override
public View getView(int position, View view, ViewGroup parent) {
LayoutInflater inflater = context.getLayoutInflater();
View rowView= inflater.inflate(R.layout.fragment_badges_listrow, null, true);
TextView txtTitle = (TextView) rowView.findViewById(R.id.text);
ImageView imageView = (ImageView) rowView.findViewById(R.id.img);
txtTitle.setText(badges.get(position).getName());
imageView.setImageResource(badges.get(position).getDrawableValue());
return rowView;
}
while debugging I found out that the getView method inside the badgesListAdapter is never called.
I have this same code for another app but without the tabpager and there it all works perfectly...
Check whether getCurrentBadges() method not returns empty list. If so there is no data to show in ListView.
I was able to make it work by inhering ListFragment in FragmentBadges, following this tutorial https://www.youtube.com/watch?v=heR4zhj_wV0
I am using a Listview. before implementing OnLongClick, my onListItemClick was working perfectly, however now, after implementing OnLongClick the long clicks work and normal list clicks don't do anything. It seems to hide exposure to the onListItemClick() function you already have working
can anyone see why/ suggest a solution?
public class CombChange extends ListActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setListAdapter(new ListEdit(this, symbols));
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
String selectedValue = (String) getListAdapter().getItem(position);
if (lastPressed.equals(selectedValue) ){
count++;}
}
public class ListEdit extends ArrayAdapter<String> implements OnLongClickListener{
private final Context context;
private final String[] values;
public ListEdit(Context context, String[] values) {
super(context, R.layout.activity_comb_change, values);
this.context = context;
this.values = values;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.activity_comb_change, parent, false);
TextView textView = (TextView) rowView.findViewById(R.id.label);
ImageView imageView = (ImageView) rowView.findViewById(R.id.logo);
textView.setText(values[position]);
rowView.setOnLongClickListener(new OnLongClickListener(){
public boolean onLongClick(View arg0) {
context.startActivity(new Intent(context,RestoreOriginal.class));
return false;
}
});
// Change icon based on name
String s = values[position];
if (s.equals("a")) {
imageView.setImageResource(R.drawable.a);
return rowView;
}
}
I think you shouldn't do rowView.setOnLongClickListener.
Try something likes this:
this.getListView().setLongClickable(true);
this.getListView().setOnItemLongClickListener(new OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> parent, View v, int position, long id) {
// whatever you wanna do
return true;
}
});
I took the code from how to capture long press event for Listeview item of a ListActivity?
Hope this helps.