Develop Reference

Android - Listview Selected Item

I made a listview and I wanted to make an user input a choice. How can I do this? Atm I only managed to create the ListView and display the data.
Is there an easy way to get the value of a selected item of the ListView and use it later? Something like a ListView RadioButton.
XML:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.tiagosilva.amob_android.TubeDataArchive" >
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/lv_tubeData"
android:choiceMode="singleChoice">
</ListView>
Listview:
public class TubeDataArchive extends Fragment {
public TubeDataArchive() {
// Required empty public constructor
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_tube_data_archive, container, false);
ListView tubeDataList = (ListView) view.findViewById(R.id.lv_tubeData);
//load tube data
SharedPreferences settings = getActivity().getSharedPreferences("PREFS",0);
String tubeDataString = settings.getString("tubeData", "");
String[] tubeDataSplit = tubeDataString.split("\n");
List<String> tubeDataItems = new ArrayList<>();
for(int i=0; i<tubeDataSplit.length;i++)
{
tubeDataItems.add(tubeDataSplit[i]);
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, android.R.id.text1, tubeDataItems);
// Assign adapter to ListView
tubeDataList.setAdapter(adapter);
return view;
}
}

Is there an easy way to get the value of a selected item of the
ListView and use it later?
Add onItemClickListener after the for loop.
tubeDataList.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// do whatever you want
Log.d("############","Items " + tubeDataSplit[arg2] );
}
});
Something like a ListView RadioButton
If you want to have a listview with a radio button, then you need to create a custom listview layout.

Add ItemClickListener to your listview
tubeDataList.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
Toast.makeText(getapplicationcontext(), tubeDataItems.get(id),
Toast.LENGTH_LONG).show();
}
});

how to remove a list item of ListView from onitemclick listener

i know how to remove a list item by using list adapter.But i want to remove a list item from a actvity which showing the list view.i am using onitemClick Listener for getting data from list item.after getting data i need to remove that item from a list view.how to do that?

You can try to this code..
ListView lv = (ListView) findViewById(R.id.lv);
TestAdapter adpter = new TestAdapter(Test.this, arralist);
lv.setAdapter(adapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
#Override
public void onItemClick (AdapterView < ? > adapterView, View view,int position, long l){
arralist.remove(position);
adapter.notifyDataSetChanged();
}
}
);

While not best practice you can also call the change on the adapter.
view.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
adapter.remove(adapter.getItem(position));
}
});

Implementing OnClickListener to list items of a list

I used list view to list the items of my SQLite database as follows:
listView = (ListView) findViewById(R.id.listView1);
db.open();
Cursor c = db.getAllHistory();
ArrayList<String> temparr = new ArrayList<String>();
if (c.moveToFirst()) {
do {
temparr.add(c.getString(0)+'\t'+c.getString(1)+'\t'+c.getString(2)+'\t'+c.getString(3)+'\t'+c.getString(4)+'\t');
} while(c.moveToNext());
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, temparr);
listView.setAdapter(adapter);
} else {
db.close();
}
Now I want to access the specific list item by using OnItemClickListener. How should i do it?

To get your perticular data-
Implement setOnItemClickListener()-
and position will return list's item position number:-
listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
String yourData = temparr.get(position);
}
});

Just call listView.setOnItemClickListener() with your implementation of the listener.

listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
// your code
// Toast.makeText(context,temparr.get(position),Toast.LENGTH_SHORT).show();
}
});
parent -> The AdapterView where the click happened.
view -> The view within the AdapterView that was clicked (this will be a view provided by the adapter)
position -> The position of the view in the adapter.
id->The row id of the item that was clicked.

You can set the listener like this:
Put this code in onCreate()
TextView disp = (TextView) findViewById(R.id.textView1);
listView.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String temp = (String) listView.getItemAtPosition(position);
disp.setText(temp);// display on screen
}
});
EDIT:
As you want to display the listItem on screen in a permenant sort of way rather than displaying a toast, the easiest way that you can do this is by adding a TextView in your layout. See the updated code
Hope this helps.

How to set OnItemClickListener() with implicit ListView use and default adapter

Usually I set my ItemClickListener using
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
long x = MyActivity.this.myAdapter.getItemId(position); //to get the clicked item position
}
});
After setting my ListView etc.
Now I have to work on a code that use the list with default Android list adapter in this way
public class ListDefs extends ListActivity {
private Defs defs;
private ArrayAdapter<String> adapter;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
defs = Note.defs;
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, defs.lines);
setListAdapter(adapter);
}
}
How to set a OnItemClickListener() in this scenario?

ListActivity has both a getListAdapter and getListView methods.
In your onCreate, after you call
setContentView(R.layout.list_activity);
where R.layout.list_activity is your layout file for the activity that has a ListView tagged with the android list id like so (according to the docs)
<ListView
android:id="#android:id/list"
... />
you can call
getListView().setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
...
}
});
From the docs
ListActivity has a default layout that consists of a single, full-screen list in the center of the screen. However, if you desire, you can customize the screen layout by setting your own view layout with setContentView() in onCreate(). To do this, your own view MUST contain a ListView object with the id "#android:id/list" (or list if it's in code)

Single Choice Lists and onClick events

I have a CHOICE_MODE_SINGLE list with 3 rows. How do I place an onClick event that changes the value of an arbitrary variable, so that if Row 1 is clicked, say, the value of X = 1, and when Row 2 is clicked, the value of X = 2, etc.?
public class List extends ListActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_single_choice, GENRES));
final ListView listView = getListView();
listView.setItemsCanFocus(false);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
}
private static final String[] GENRES = new String[] {"Barre", "Buffumville","Hodges"};
}

Its quite simple..rather than extending ListActivity extend it by Activity and just declare listview in your XML file as below:
<ListView
android:id="#+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
initialize listview in your activity:
ListView listView=(ListView) findViewById(R.id.list);
And after setting adapter as you did,set the item click listener of the listview as below in your code:
listView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position,
long id) {
Toast.makeText(getBaseContext(), GENRES[position], Toast.LENGTH_SHORT).show();
}
});
By doing this you will get the desired value of that position of listview.
You will surely get the result you want.

You want to set the onItemClickListener on the list view.
listView.setOnItemClickListener(
new OnItemClickListener(
#Override
onItemClick(AdapterView<?> listView, View cell, int position, long id) {
// Code to change variables
}
});

You can implement protected void onListItemClick (ListView l, View v, int position, long id) in your ListActivity, and the position variable lets you know which item was clicked.