Develop Reference

Get LinearLayout reference at custom view

My question is about Android/Java.
I wanna access to other views from my custom view.
My main.xml:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/mainLinearLayout1">
<org.javaforum.input
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
required=""
android:hint="Enter your E-Mail"
oninvalid="this.setCustomValidity('SO - Please enter a correct E-Mail!!!')"/>
<org.javaforum.input
android:layout_width="wrap_content"
android:layout_height="wrap_content"
inputType="submit"/>
</LinearLayout>
So when the second "input" view is clicked, I wanna check if there exists an attribute named "required" at the first "input" view.
I tried this in my input.java:
public class input extends TextView{
public input(Context context, AttributeSet attr) {
super(context, attr, getIdentifier(context,attr));
}
#Override
public void onFinishInflate() {
setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
LinearLayout layout = (LinearLayout)findViewById(R.id.mainLinearLayout1);
View v = null;
for(int i=0; i<layout.getChildCount(); i++) {//Error
//Code
}
}
});
}
}
But I get the following error:
java.lang.NullPointerException: Attempt to invoke virtual method 'int android.widget.LinearLayout.getChildCount()' on a null object reference
I don't understand why it's null. It should be already created, right?
So how can I get an LinearLayout reference of my main.xml at my custom view correctly?

To solve the null pointer exception, you will need to search for the other widget in the parent LinearLayout. You can use View.getParent() to identify the parent. Since the view you are looking for is a sibling of the current view, you will find it in the parent.
As for determining if a certain attribute is set, I recommend that the value be captured by its view and a method provided to present that value upon request. Say the value is your "required" value then capture that value locally and provide a method, getRequiredValue(), for instance, to expose it.

You can use
LinearLayout layout = (LinearLayout) getRootView().findViewById(R.id.mainLinearLayout1);
if you only call findViewById inside custom view it only lookup the child view.

This should be called in the Activity's onCreate instead of TextView's onFinishInflate.
First give the submit button an id eg btn_submit, then in onCreate
Button btn_submit = (Button)findViewById(R.id.btn_submit);
btn_submit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
LinearLayout layout = (LinearLayout)findViewById(R.id.mainLinearLayout1);
View v = null;
for(int i=0; i<layout.getChildCount(); i++) {
//Code
}
}
});

Spinner updating only on user actions

I have IconText that has image and text views inside it, both class and xml.
I then populate the Spinner inside of the MainActivity with these IconTexts, using extended BaseAdapter (IconTextAdapter) as adapter.
Now, IconText works fine (shows as it should).
Spinner however doesn't.
When I start the app, it shows the first IconText as it should.
When I open the choose dialog, everything is showing as it should.
When I select another item, the choose dialog collapses and spinner displays no IconText (ie. only "arrow down" for opening choose dialog).
I can still open the choose dialog and choose another.
I've noticed that if I exit from app (return button, not really quiting the app) and enter again that the proper IconText is shown.
I guess that the fault lies with the adapter?
I will try avoiding posting a lot of code [:
IconText.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<ImageView android:id="#+id/it_image"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:src="#drawable/home"/>
<TextView
android:id="#+id/it_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="20sp"
android:text="ABC"
android:textColor="#color/black_overlay"
android:textSize="20sp"
android:textStyle="bold" />
</LinearLayout>
IconText.java
public class IconText {
static LayoutInflater inflator;
public ImageView icon;
public TextView text;
public View view;
public IconText(String title, int icon_id){
Log.d("IconText", "Create");
view = inflator.inflate(R.layout.icon_text, null);
text = (TextView) view.findViewById(R.id.it_text);
icon = (ImageView) view.findViewById(R.id.it_image);
text.setText(title);
icon.setImageResource(icon_id);
}
public static void initInflator(Context context){
if(inflator != null) return;
Log.d("IconText", "Init inflator");
inflator = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
}
IconTextAdapter.java
public class IconTextAdapter extends BaseAdapter implements SpinnerAdapter{
public ArrayList<IconText> items;
public IconTextAdapter(){
super();
items = new ArrayList<>();
}
#Override
public int getCount() {
return items.size();
}
#Override
public Object getItem(int arg0) {
return items.get(arg0);
}
#Override
public long getItemId(int position) {
return items.get(position).view.getId();
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
return items.get(position).view;
}
}
MainActivity, relevant code
void initFilter(){
Log.d("MainAction", "Find Filter");
filter = (Spinner) findViewById(R.id.filter);
Log.d("MainAction", "Create Adapter");
IconTextAdapter adapter = new IconTextAdapter();
Log.d("MainAction", "Create items");
for(int i=0; i<ETypes.names.length; i++){
IconText it = new IconText(ETypes.names[i], ETypes.icons[i]);
adapter.items.add(it);
}
Log.d("MainAction", "Setting adapter");
filter.setAdapter(adapter);
}
ETypes names[string] and icons[id] are static.
Inflator is initialized succesfully.
I haven't worked much in Android. If it were Java/Swing, I guess I would just call a redraw or something.
I know there are some bad practices here (all public variables, and so on). This code is still in early prototype stage, it will be fixed soon. I'm not looking for optimization, just for the solution to my problem.
Update 1:
So I saw I didn't implement getDropDownView so I did, the same code as getView (no need to post it?).
Also I made an experiment: At the end of IconText contrusctor I added
view = text
And it works just fine (showing only text).
I guess this pinpoints that the problem originates from custom view?
Update 2:
Did another experiment with IconText, setting view = icon; and it doesn't behave as it should, ie. it behaves like it's a custom view.

Doesn't really solve this specific bug, but it solves my problem.
Custom Image and Text View in Spinner Solution.

To update the list you must call
adapter.notifyDataSetChanged()
after adding new data to your adapter
Please refer to the following
https://developer.android.com/reference/android/widget/BaseAdapter.html#notifyDataSetChanged()

How to show more than one text item in an Android/Java listview?

I have a listview with a checkbox, an image and a text field. Now I do want to display more than one items in the text field. The problem is that I want the arguments in neat colums. Can I somehow set tabstops or a format or something like that in the text field or do I have to actually make more text fields and set each value in its own field ?
My list should look somewhat like:
[Image] [checkbox] "arg11 arg12 arg13"
[Image] [checkbox] "arg21 arg22 arg23"
[Image] [checkbox] "arg31 arg32 arg33"
Thanks for any advice.
Edit: Just to clarify things. I have a working listview/adapter with the image/checkbox and one textfield already. I am kind of new to Android so all I want to know if there is an elegant way to handle displaying several text items in the text field. In Windows I would simply use tabstopps and they would look ordered and in a column but I don't know my way well enough around android to know if there is something similar or if individual text fields are required to get the text fields in columns.

You create new xml say row.xml, which we can inflate inside listview for each row.
Design the row however you want, for ex:
row.xml
<LinearLayout android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:orientation="horizontal">
<ImageView ..../>
<CheckBox ...../>
<TextView ...../>
<TextView ...../>
</LinearLayout>
Then use CustomAdapter for your listview
like,
listView.setAdapter(new CustomAdapter());
CustomAdapter,
class CustomAdapter extends BaseAdapter{
publicCustomAdapter() {
mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return xyz.size();
}
#Override
public String getItem(int position) {
return xyz.get(position);
}
#Override
public long getItemId(int position) {
return position;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.row, null);
holder = new ViewHolder();
holder.imageView = (ImageViewView)convertView.findViewById(R.id.image);
holder.checkbox = (CheckBox)convertView.findViewById(R.id.checkbox);
holder.textView1 = (TextView)convertView.findViewById(R.id.text1);
holder.textView2 = (TextView)convertView.findViewById(R.id.text2);
convertView.setTag(holder);
} else {
holder = (ViewHolder)convertView.getTag();
}
//TODO set the values for views and return view
return convertView;
}
}

You should Re-work on the row xml. I think you may know about the row xml where you can chage the design of each and every row. Take a Relative or Linear Layout and add the views as shown below.
[Image] [checkbox] "text1" "text2 "text3"
[Image] [checkbox] "text1" "text2 "text3"
[Image] [checkbox] "text1" "text2 "text3"
Instead of taking tab spaces, take three different TextView's. keep '1' as weight for each and every TextView and add these to a LinearLayout which is having total weight sum as 3.So all the three TextView will be equally placed in the parent view.
Try this and lemme know whether you fixed it.....

Basically you need to implement your own adapter for your ListView.
First you need to create your own adapter class which either baseAdapter or their derivatives.And then you need to implement your ListView item display logic in it.
Like setting your textViews,imageViews etc.
Check this tutorial for more info.
http://www.vogella.de/articles/AndroidListView/article.html

From one of my earlier posts:
Whenever you want to do processing with the views in a ListView you
need to create a custom adapter that will handle your logic
implementation and pass that information to the views as necessary.

If you are sure about the sizes of text then you can use tabstops in your text. If that doesnt work then your are stuck with extending your row layout. as mentioned by Pavandroid

Android Custom Dialog NullPointerException

I cannot for the life of me figure out why I'm getting a NullPointerException.
When a user clicks on a particular image, a dialog window is supposed to pop-up and display a larger version of said image:
private OnClickListener coverListener = new OnClickListener()
{
public void onClick(View v)
{
showDialog(DIALOG_COVER);
}
};
DIALOG_COVER is set to = 0.
The associated onCreateDialog looks like this:
protected Dialog onCreateDialog(int id) {
Dialog dialog;
switch(id)
{
case DIALOG_COVER:
dialog = new Dialog(mContext);
dialog.setContentView(R.layout.cover_dialog);
dialog.setTitle(book.getTitle());
ImageView coverLarge = (ImageView)findViewById(R.id.coverLarge);
coverLarge.setImageBitmap(book.getCover());
break;
default:
dialog = null;
}
return dialog;
}
For reference, this is cover_dialog.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/coverDialog"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp">
<ImageView android:id="#+id/coverLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:scaleType="fitStart"
/></LinearLayout>
Now, when the image previously described is clicked, the application immediately crashes and throws the following error through LogCat:
06-08 13:29:17.727: ERROR/AndroidRuntime(2220): Uncaught handler: thread main exiting due to uncaught exception
06-08 13:29:17.757: ERROR/AndroidRuntime(2220): java.lang.NullPointerException
06-08 13:29:17.757: ERROR/AndroidRuntime(2220): at org.kylehughes.android.brarian.AndroidBrarian.onCreateDialog(AndroidBrarian.java:259)
The line in question refers to this line inside of onCreateDialog:
coverLarge.setImageBitmap(book.getCover());
Basically, I don't get why coverLarge is null at that point. Any help would be much appreciated.

What's about:
/** snip **/
LayoutInflater factory = LayoutInflater.from(mContext);
View dialogView = factory.inflate(R.layout.cover_dialog,null);
ImageView coverLarge = (ImageView)dialogView.findViewById(R.id.coverLarge);
dialog = new Dialog(mContext);
dialog.setContentView(dialogView);
dialog.setTitle(book.getTitle());
coverLarge.setImageBitmap(book.getCover());
/** snip **/
Just written from scratch. Please check the syntax

This
(ImageView)findViewById(R.id.coverLarge);
returns a nullvalue. You may be passing an invalid/malformed id String to the findViewById method. Have you checked (debugged) what this String looks like before you get the NPE?

Is it possible that you have a different xml file defining the same ID (coverLarge) for a different kind of View (say a Button)? Also, notice how the id you use to setup the dialog is cover_dialog but in the XML file you have coverDialog

You have a few things going on at that line that some debug output would help. I'd start by System.out.println'ing the values of coverLarge and book immediately before the offending line. I know they shouldn't be null, but it wouldn't hurt to rule those possibilities out.

How do I clear ListView selection?

TL;DR: You choose an option from (a) my listview. Then, you change your mind and type something in (b) my edit text. How do I clear your listview selection and only show your edittext? (and vice versa)
I have an application with a listview of options as well as an edittext to create an own option. I need the user to either choose or create an option, but not both. Here's a drawing of my layout:
Whenever the user selects an option from the listview, I set it as "selected" by making it green, like so:
<?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_selected="true"
android:drawable="#color/colorPrimary"/>
<item
android:state_selected="false"
android:drawable="#color/windowBackground" />
</selector>
(this is set as the background of my listview)
Problem: I want to unselect the listview option if the user decides to type in their own option since they can only have one option.
User selects an option from the listview
User decides they want to create their own option using the edittext
The listview option is unselected when they start typing their own
I've tried doing the following, but nothing unselects.
e.setOnEditorActionListener(new TextView.OnEditorActionListener()
{
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
for(int i=0; i<=5; i++){
listView.setItemChecked(i, false);
}
listView.clearChoices();
listView.requestLayout()
adapter.notifyDataSetChanged()
}
}
A very puzzling predicament, any help is appreciated!
Edit: here is the layout of the edittext:
<EditText
android:id="#+id/editText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/textView4"
android:layout_alignBottom="#+id/textView4"
android:layout_toEndOf="#+id/textView4"
android:layout_toRightOf="#+id/textView4"
android:color="#color/colorPrimary"
android:imeOptions="actionDone"
android:inputType="text"
android:textColor="#color/textColorPrimary"
android:textColorHint="#color/colorPrimary" />
Edit: here is the layout of the listview:
<ListView
android:id="#+id/listview"
android:layout_width="wrap_content"
android:layout_height="250dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="#+id/toolbar"
android:background="#drawable/bg_key"
android:choiceMode="singleChoice"
android:listSelector="#color/colorPrimary">
</ListView>

Long Story Short
ListView selector (android:listSelector) is designed to indicate a click event, but not selected items.
If a ListView selector is drawn (after first click) it won't dissapear without drastic changes in the ListView
Hence use only drawables with transparent background if no state is applied to it as a ListView selector. Don't use a plain color resource for it, don't confuse yourself.
Use ListView choice mode (android:choiceMode) to indicate selected items.
ListView tells which row is selected by setting android:state_activated on the row's root view. Provide your adapter with corresponding layout/views to represent selected items correctly.
TL/DR Solutions
You can hide/remove selector with one of the following:
Making the selector transparent getSelector().setAlpha(0)
Resetting the current adapter with setAdapter(myAdapter) (adapter might be the same)
Solutions that might or might not work, depending on the OS version:
Making the list view to refresh layout completely via requestLayout(), invalidate() or forceLayout() methods;
Making the list view to refresh layout via notifyDataSetChanged()
Theory
Well, the built-in selection in ListView is utterly tricky at a first glance. However there are two main distinctions you should keep in mind to avoid confusing like this - list view selector and choice mode.
ListView selector
ListView selector is a drawable resource that is assumed to indicate an event of clicking a list item. You can specify it either by XML-property android:listSelector or using method setSelector(). I couldn't find it in docs, but my understanding is that this resource should not be a plain color, because after it's being drawn, it won't vanish without drastic changes in the view (like setting an adapter, that in turn may cause some glitches to appear), hence such drawable should be visible only while particular state (e.g. android:state_pressed) is applied. Here is a simple example of the drawable that can be used as a List View selector
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_pressed="true"
android:drawable="#android:color/darker_gray" />
<item
android:drawable="#android:color/transparent" />
</selector>
For whatever reason you cannot use a Color State List as List View selector, but still can use plain colors (that are mostly inappropriate) and State List drawables. It makes things somewhat confusing.
After the first click on a List View happens, you will not be able to remove List View selector from the List View easily.
The main idea here is that List View selector is not designed to indicate selected item.
ListView choice mode
ListView choice mode is assumed to indicate selected items. As you might know, primarily there are two choice modes we can use in ListView - Single Choice and Multiple Choice. They allow to track a single or multiple rows selected respectively. You can set them via android:choiceMode XML-property or setChoiceMode() method.
The ListView itself keeps selected rows in it and let them know which one is selected at any given moment by setting android:state_activated property of the row root view. In order to make your rows reflect this state, their root view must have a corresponding drawable set, e.g. as a background. Here is an example of such drawable:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_activated="true"
android:drawable="#android:color/holo_green_light" />
<item
android:drawable="#android:color/transparent" />
</selector>
You can make rows selected/deselected programmatically using the setItemChecked() method. If you want a ListView to clear all selected items, you can use the clearChoices() method. You also can check selected items using the family of the methods: getCheckedItemCount(), getCheckedItemIds(), getCheckedItemPosition() (for single choice mode), getCheckedItemPositions() (for multiple choice mode)
Conclusion
If you want to keep things simple, do not use the List View selector to indicate selected items.
Solving the issue
Option 1. Dirty fix - hide selector
Instead of actually removing selector, changing layouts and implementing a robust approach, we can hide the selector drawable when it's needed and show it later when clicking a ListView item:
public void hideListViewSelector() {
mListView.getSelector().setAlpha(0);
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (mListView.getSelector().getAlpha() == 0) {
mListView.getSelector().setAlpha(255);
}
}
Option 2. Thoughtful way
Let's go through your code and make it comply the rules i described step by step.
Fix ListView layout
In your ListView layout the selector is set to a plain color, and therefore your items are colored by it when they are clicked. The drawable you use as the ListView background have no impact, because ListView state doesn't change when its rows are clicked, hence your ListView always has just #color/windowBackground background.
To solve your problem you need at first remove the selector from the ListView layout:
<ListView
android:id="#+id/listview"
android:layout_width="wrap_content"
android:layout_height="250dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_below="#+id/toolbar"
android:listSelector="#color/colorPrimary"
android:background="#color/windowBackground"
android:choiceMode="singleChoice"/>
Make your rows reflect activated state
In the comments you give your adapter as follows:
final ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, text1, listOfThings);
You also asked me if it's possible to keep using standard adapter to achieve desired behavior. We can for sure, but anyway a few changes are required. I can see 3 options for this case:
1. Using standard android checked layout
You can just specify a corresponding standard layout - either any of the layouts that use CheckedTextView without changed background drawable as the root component or of those that use activatedBackgroundIndicator as their background drawable. For your case the most appropriate option should be the simple_list_item_activated_1. Just set it as in your ArrayAdapter constructor like this:
final ArrayAdapter<String> adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_activated_1, android.R.id.text1, listOfThings);
This option is the closest to what i understand by 'standard' adapter.
2. Customize your adapter
You can use standard layout and mostly standard adapter with a small exception of getting a view for your items. Just introduce an anonymous class and override the method getView(), providing row views with corresponding background drawable:
final ArrayAdapter<String> adapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, android.R.id.text1, listOfThings) {
#NonNull
#Override
public View getView(int position, #Nullable View convertView, #NonNull ViewGroup parent) {
final View view = super.getView(position, convertView, parent);
if (convertView == null) {
view.setBackgroundResource(R.drawable.list_item_bg);
}
return view;
}
};
3. Customize your layout
The most common way of addressing this issue is of course introducing your own layout for the items view. Here is my simple example:
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:background="#drawable/list_item_bg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:padding="16dp">
<TextView
android:id="#android:id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</FrameLayout>
I saved it in a file /res/layout/list_view_item.xml Do not forget setting this layout in your adapter:
final ArrayAdapter<String> adapter = new ArrayAdapter(this, R.layout.list_view_item, android.R.id.text1, listOfThings);
Clearing selection
After that your rows will reflect selected state when they are clicked, and you can easily clear the selected state of your ListView by calling clearChoices() and consequence requestLayout() to ask the ListView to redraw itself.
One little comment here that if you want unselect the item when user start typing, but not when he actually clicks the return (done) button, you need to use a TextWatcher callback instead:
mEditText.addTextChangedListener(new TextWatcher(){
#Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
#Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
if (mListView.getCheckedItemCount() > 0) {
mListView.clearChoices();
mListView.requestLayout();
}
}
#Override
public void afterTextChanged(Editable s) {}
});
Hopefully, it helped.

I have a good solution to do that. Add EditText to your layout which contains on your ListView as this layout:
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:focusable="true"
android:focusableInTouchMode="true"
android:layout_height="match_parent"
tools:context=".MainActivity">
<ListView
android:id="#+id/list_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical"
android:choiceMode="singleChoice"
/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Comment"
android:layout_below="#id/list_view"
android:id="#+id/editText"
android:nextFocusUp="#id/editText"
android:nextFocusLeft="#id/editText"/>
</RelativeLayout>
Then initialize Boolean variable to check whether editText if focused or not for example use this : boolean canBeSelected = true;
Then after setting adapter use this code:
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
if (canBeSelected) {
listView.setSelector(R.drawable.background);
listView.setSelected(true);
listView.setSelection(i);
} else {
if (!editText.isFocused()){
canBeSelected = true;
listView.setSelector(R.drawable.background);
listView.setSelected(true);
listView.setSelection(i);
}
}
}
});
editText.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View view, MotionEvent motionEvent) {
canBeSelected = false;
Drawable transparentDrawable = new ColorDrawable(Color.TRANSPARENT);
listView.setSelector(transparentDrawable);
listView.clearChoices();
listView.setSelected(false);
return false;
}
});
editText.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
if (editText.isFocused()){
Drawable transparentDrawable = new ColorDrawable(Color.TRANSPARENT);
listView.setSelector(transparentDrawable);
listView.clearChoices();
listView.setSelected(false);
canBeSelected = false;
}
}
#Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
Drawable transparentDrawable = new ColorDrawable(Color.TRANSPARENT);
listView.setSelector(transparentDrawable);
listView.clearChoices();
listView.setSelected(false);
canBeSelected = false;
}
#Override
public void afterTextChanged(Editable editable) {
if (editText.isFocused()) {
Drawable transparentDrawable = new ColorDrawable(Color.TRANSPARENT);
listView.setSelector(transparentDrawable);
listView.clearChoices();
listView.setSelected(false);
canBeSelected = false;
}
}
});
}
Hope it works with you :)

Re-setting the adapter in the edittext listener worked for me:
editText.addTextChangedListener(new TextWatcher() {
#Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
#Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
listview.clearChoices();
listview.setAdapter(adapter);
Toast.makeText(getApplicationContext(),"Typing" + listview.getSelectedItemPosition(), Toast.LENGTH_SHORT).show();
}
#Override
public void afterTextChanged(Editable editable) {
}
});
I put the selected index in a toast to check if the item was correctly deselected.
Hope this works!!

Just call clear when you make the request for the second data set:
arrayAdapter!!.clear()
You load your first data set
The user select one elements,
This action highlight your item
For any reason you launch the reload of your data set (because edittext's value changed),
at this moment call, clear() on your adapter.
Then you retrieved your dataset, you send it to the arrayAdapter and
No one is selected .
This is because when you clear, it also clear the selected flag