Develop Reference

How to repeat spinner dynamically?

I have RelativeLayout with ScrollView as the root element. In RecyclerView I have spinner and TextView. Now I am getting data from JSON like RollNumber and Marks. Now in TextView, I need to show RollNumber and in Spinner Marks should be displayed. I already got the data in ArrayList<Progress> and what should be the code will look like for this situation;
Do I have to repeat the RelativeLayout in for loop?
OnCreate
for (int i = 0; i < progress.size(); i++) {
progress_addmore_spinner.setOnItemSelectedListener(new
AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
{
parent.getItemAtPosition(position).toString();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
loadspinner
}
private void loadSpinners()
{
if (progress != null || progress.size() > 0) {
ArrayList<String> progresscard = new ArrayList<>();
for (int i = 0; i < progress.size(); i++) {
progresscard.add(progress.get(i).toString());
}
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,
progresscard);
// Drop down layout style - list view with radio button
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
progress_addmore_spinner.setAdapter(dataAdapter);
if (progress.get(0).getMarks() != null && !progress.get(0).getMarks().isEmpty()) {
product_addmore_spinner.setSelection(progresscard.indexOf(toppingtypelist.get(0).getMarks()));
}
}
}

You can set the spinner including the adapter, the default value in the onBindViewHolder of the recyclerview adapter. Also set the position as the tag of the spinner in the adapter like: vh.view.setTag(position);
Now implement the OnItemSelectedListener in the activity or the fragment and pass it onto the recyclerview adapter. Since you have already set the position of the spinner as the tag, you can easily extract the index of the progress object in the ArrayList.
new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
int index = (int) parent.getTag();
parent.getItemAtPosition(position).toString();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
};

How to get a arraylist<bitmap> from gridview

I am setting a shuffled arraylist in grid view after rearranging i want to get the arraylist in the order it is there in gridview . i used getChildAt(position) but it is returning a view.
Here is my code:
for (int i = 0; i < smallimages.size(); i++) {
// ArrayList<View>bh=new ArrayList<>(9);
beforeshuffle.add(smallimages.get(i));
// SmallImageAdapter ad=new SmallImageAdapter(c,beforeshuffle);
}
Collections.shuffle(smallimages);
image_grid.setAdapter(new SmallImageAdapter(this, smallimages));
// image_grid.setAdapter(new SmallImageAdapter());
image_grid.setNumColumns((int) Math.sqrt(smallimages.size()));
image_grid.setOnItemClickListener(new AdapterView.OnItemClickListener() {
int counter = 0;
int firstclick;
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
counter++;
if (counter % 2 == 0) {
firstclick = position;
Bitmap data1 = smallimages.get(position);
} else {
Bitmap swapImage = smallimages.get(position);
smallimages.set(position, smallimages.get(firstclick));
smallimages.set(firstclick, swapImage);
image_grid.invalidateViews();
}
// ArrayList<View>h=new ArrayList<View>(9);
for (int i=0;i<smallimages.size();i++) {
aftershuffle.set(i, smallimages.get(i));
}
}
});
this aftershulffle is not in the same order the images are place in the
grid view. So when i check
beforeshuffle.get(1).sameAs(aftershuffle.get(1))
it returns false

You can use setTag() and getTag() on the view to store custom class objects , For ex: imageView.setTag(person).
Later you can call Person person = (Person)getChildAt(position).getTag()
https://developer.android.com/reference/android/view/View.html#setTag(java.lang.Object)

Spinner And Listview

I am using spinner and listview concurrently, I have some logic that when i scroll on list i have have a data indication that tells which values to set on spinner, and i m using
spinner.setSelection(somePosition);
and when I click on Spinner it has also some data which indicate that to set the position of
listView.setSelection(somePosition);
Problem is that when i m scrolling on listView and in my adapter i need to change the postion of spinner selected item it calls the method
spinnerSurah.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> adapterView, View view, int clickPosition, long l) {
int skipTotal = 0;
for(int i = 0 ; i < clickPosition ; i++)
{
SafeJSONObject surahObject = jsonArraySurahList.getJSONObject(i);
skipTotal+= surahObject.getInt("ayas");
}
SafeJSONObject surahObject = jsonArraySurahList.getJSONObject(clickPosition);
Log.e("spinnerSurah","spinnerSurah surahObject "+surahObject.toString());
positionSelection = skipTotal;
listView.setSelection(positionSelection);
}
}
#Override
public void onNothingSelected(AdapterView<?> adapterView) {
}
});
Help me, I need to just change the postion of spinner without calling its listener.

You could set a condition in your listener that bypasses the selection logic if the ListView selection is called from the listener.
Declare a boolean in your class:
boolean skip_listener = false;
and change your listener to
#Override
public void onItemSelected(AdapterView<?> adapterView, View view, int clickPosition, long l) {
if(skip_listener){skip_listener = !skip_listener;return;}
int skipTotal = 0;
for(int i = 0 ; i < clickPosition ; i++)
{
SafeJSONObject surahObject = jsonArraySurahList.getJSONObject(i);
skipTotal+= surahObject.getInt("ayas");
}
SafeJSONObject surahObject = jsonArraySurahList.getJSONObject(clickPosition);
Log.e("spinnerSurah","spinnerSurah surahObject "+surahObject.toString());
positionSelection = skipTotal;
skip_listener = true;
listView.setSelection(positionSelection);
}
}

Retrieving the selected items from a multi-select ListView

I am currently implementing a multi-select ListView for my android app. My aim is to retrieve the selected items from the ArrayAdapter associated with the ListView when clicking the search button.
I am currently stumped on how to do this, I have found stuff online such as trying to set a MultiChoiceModeListener, but this does not seem to come up as an option in Eclipse. I am using Google APIs(level 10), Android 2.3.3 equivalent. Here is the code I have so far:
public class FindPlace extends Activity {
public FindPlace() {}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_places);
Button search = (Button) findViewById(R.id.search);
String[] categories = getResources().getStringArray(R.array.Categories);
ArrayAdapter ad = new ArrayAdapter(this,android.R.layout.simple_list_item_multiple_choice,categories);
final ListView list=(ListView)findViewById(R.id.List);
list.setAdapter(ad);
list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
list.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) { }
});
}
}

Slightly more efficiently / correctly:
SparseBooleanArray checked = listView.getCheckedItemPositions();
for (int i = 0; i < checked.size(); ++i)
{
if (checked.valueAt(i))
{
int pos = checked.keyAt(i);
doSomethingWith(adapter.getItem(pos));
}
}

Use the method getCheckedItemPosition().

take the count of the selected item in the int and make for loop like below.
int len = listView.getCount();
SparseBooleanArray checked = listView.getCheckedItemPositions();
for (int i = 0; i < len; i++){
if (checked.get(i)) {
String item = cont_list.get(i);
/* do whatever you want with the checked item */
}
}

Setting font on ListActivity in Android

I'm trying to set a custom font on a list activity in Android. I can successfully do it once an item gets clicked, like so:
#Override
protected void onListItemClick(ListView listView, View listItemView,
int position, long id) {
int childCount = listView.getChildCount();
for (int i = 0; i < childCount; i++) {
TextView c = (TextView) listView.getChildAt(i);
c.setTypeface(mTypeFace);
}
However, before the item is clicked, assigning a font has no impact:
//
// Create the adapter to display the choice list
//
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
R.layout.simple_list_item_single_choice_custom,
mAppState.mAnswerArray) {
};
/* attach the adapter to the ListView */
setListAdapter(adapter);
ListView v = getListView();
int childCount = v.getChildCount();
for (int i = 0; i < childCount; i++) {
TextView c = (TextView) v.getChildAt(i);
c.setTypeface(mTypeFace);
}
Debugging show that in the initial setup, the ListView v has zero children, despite the fact they show up in the GUI and mAnswerArray has the children.
Any idea what the problem might be?

Set the viewBinder and override the setViewValue in your adapter, like so:
adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
#Override
public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
if(columnIndex == 7){
TextView textView = (TextView) view;
textView.setTypeface(gotham_book);
}
}
}