Develop Reference

Why is My Listview is not showing my items?

I have a listview that I want to show several items. However, after the program compiles, nothing shows up and I am unsure as to why.
ListView listView = findViewById(R.id.quikList);
ArrayList<String> list = new ArrayList<String>();
list.add("Hello");
list.add("Is it me youre looking for?");
list.add("I can see it in your smile and I want so badly to make this listview work");
ArrayAdapter<String> aa = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, android.R.id.text1, list);
listview.setAdapter(aa);
I don't know why this pretty basic task is not working. I think it might be due to android.R.id.text1, but I'm not sure as to why. Any sort of light anyone can shed on this topic would be fantastic.

No need of 3rd param just remove this line android.R.id.text1
ArrayAdapter<String> aa = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, list);
listView.setAdapter(aa);
Solution 2:
May be your theme issues which means your Textview color same as Listview background color..
so just change your listview background color...
android:background="#android:color/holo_red_dark"

Try this:
ListView listView = (Listview)findViewById(R.id.quikList);
String list[] = {"Hello","Is it me youre looking for?","I can see it in your smile and I want so badly to make this listview work"};
ArrayAdapter<String> aa = new ArrayAdapter<String>(this, R.layout.simple_list_item_1, R.id.textView, list);
listview.setAdapter(aa);

Set Spinner adapter then EditText input type changed

I have set spinner to ArrayAdapter as String list.
// Creating adapter for spinner
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(LoginActivity.this, R.layout.row_spinner, countryCodeList);
dataAdapter.setDropDownViewResource(R.layout.row_spinner);
// attaching data adapter to spinner
spinnerCountryCode.setAdapter(dataAdapter);
In this set spinner adapter successfully but LoginActivity I have also other EditText control as InputType number.
My problem is after spinner adapte set click on Edittext then first open number keyboard and then after immediate open system text keyboard.
I have also set EditText input type as number
android:inputType="number"
And manifest file set windowSoftInputMode is
android:windowSoftInputMode="stateAlwaysHidden|adjustPan"
Please suggest me some solution.
Thanks in advance..!

something is wrong with your R.layout.row_spinner , try adding android.R.layout.simple_spinner_item in place of R.layout.row_spinner and run once
ArrayList<String> values;
values = new ArrayList<>();
values.add("value1");
values.add("value1");
values.add("value1");
values.add("value1");
// Creating adapter for spinner
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_spinner_item, values);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
// attaching data adapter to spinner
spinner.setAdapter(dataAdapter);

How to change multi Spinner's value

I use two Spinner and get data from asyncTask when I get first spinner and want get the 2th spinner but when setadapter .. two spanner's data are the same...
This is i setadapter first time.
List<String> none=new ArrayList<String>();
none.add("none");
ArrayAdapter<String> adapterchoseTime =
new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, none);
adapterchoseTime.setDropDownViewResource(
android.R.layout.simple_spinner_dropdown_item);
ArrayAdapter<String> adapterchoseProm =
new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, none);
adapterchoseProm.setDropDownViewResource(
android.R.layout.simple_spinner_dropdown_item);
choseTime.setAdapter(adapterchoseTime);
choseProm.setAdapter(adapterchoseProm);
I get Spinner 1's data
ArrayAdapter<String> adapterchoseTime=(ArrayAdapter<String>)choseTime.getAdapter();
adapterchoseTime.clear();
adapterchoseTime.addAll(time);
choseTime.refreshDrawableState();
and i get spinner2's data
ArrayAdapter<String> adapterchoseTime = (ArrayAdapter<String>)choseTime.getAdapter();
adapterchoseTime.clear();
adapterchoseTime.addAll(time);
ArrayAdapter<String> adapterchoseProm = (ArrayAdapter<String>)choseProm.getAdapter();
adapterchoseProm.clear();
adapterchoseProm.addAll(prom);
choseTime.setAdapter(adapterchoseTime);
choseProm.setAdapter(adapterchoseProm);
And then I get two same spinner...

It looks like you're referencing the same spinner from your setDropDownViewResource.
adapterchoseTime.setDropDownViewResource(
android.R.layout.simple_spinner_dropdown_item);
One of these needs to reference the second spinner.

Populating ListView with ArrayAdapter force closes

I am trying to use the following code to populate a ListView using a predefined array of strings:
String[] schedule_names = getResources().getStringArray(R.array.test_schedules);
// Populate the ListView using the array of schedule names
ArrayList<String> als = new ArrayList<String>(Arrays.asList(schedule_names));
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.id.listView, als);
adapter.add("Test");
ListView listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(adapter);
But it force closes unless I comment out listView.setAdapter(adapter); (which obviously means the ListView isn't populated at all). It seems the reason is a NullPointerException.
Why is this?

This line is wrong...
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.id.listView, als);
...the second parameter of the constructor should not be your ListView, it should be a layout with a TextView.
Try replacing R.id.listView with android.R.layout.simple_list_item_1

Adapt ArrayList into ListView

I have a XML File and I had parsed the data into the textView successfully now I want to bind that data into the ArrayList or List and display it in ListView.
But I don't know how to bind arraylist data into the ListView.
I have added all data into the arraylist successfully as mentioned in the below code.
List al = new ArrayList();
al.add(parser.getAttributeValue(null, "firstnames"));
Kindly please help me with the code syntax for the above issue.
Regards .
Thanks in advace

please have a look at the sample at http://codinglookseasy.blogspot.in/2012/07/android-list-view-sample.html
Instead of this
aa = new ArrayAdapter(this,
android.R.layout.simple_list_item_1, months);
setListAdapter(aa);
use this in your case
aa = new ArrayAdapter(this,
android.R.layout.simple_list_item_1, al);
setListAdapter(aa);

You need to use an Adapter to bind a List to a ListView, like this:
List<String> list = new ArrayList<String>();
// add data to list
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list);
ListView listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(adapter);
Notice that the subtype of List (which is String) matches the subtype of the ArrayAdapter (also String). The layout android.R.layout.simple_list_item_1 defines how the String is displayed in every row. You can look up the specifics of this layout in your SDK, if you want you can also use you own layout. Hope that helps, good luck learning Android!