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how do i preserve item selected from spinner even after exiting app?

Here is my code below, which is getting item from spinner on click
public class SpinnerActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {
private Spinner spinner1,spinner2,spinner3;
private static final String[] sports = {
"Hockey","Cricket","Football","Basketball","Badminton","Tennis"
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_spinner);
spinner1 = (Spinner)findViewById(R.id.drop_down);
spinner2 = (Spinner)findViewById(R.id.drop_down2);
spinner3 = (Spinner)findViewById(R.id.drop_down3);
ArrayAdapter<String> adapter;
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item,sports);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(adapter);
spinner2.setAdapter(adapter);
spinner3.setAdapter(adapter);
}
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String item = parent.getItemAtPosition(position).toString();
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
}
How do I preserve the selected spinners' item even after exiting the application?

You can use SharedPreference to store the selected value position/id/string.
Simply add this line when you get String item
Editor edit = context.getSharedPreferences("Name_of_sf",Context.MODE_PRIVATE).edit();
edit.putString("selected_item", item);
edit.commit();
And can simply retrieve the value as
context.getSharedPreferences("Name_of_sf",Context.MODE_PRIVATE).getString("selected_item", "");

For more info #AnirudhSohil you could see the official documentation, it has a very detail examples, I hope that it helps you.
http://developer.android.com/training/basics/data-storage/shared-preferences.html

Clicked drop-down item in AutoCompleteTextView does not respond on the first click

My app implements a HashMap, such that when a key is typed in the AutoCompleteTextView editText, and user clicks a dropdown item, the value gets displayed on a textView.
The only problem is that the clicked drop-down item does not respond on the first click (this only happens once, after the app is launched but works fine subsequently), the user MUST re-type a key and click the item before it displays the value.
Any suggestions as to how to resolve this?
Java code:
public class MainActivity extends ActionBarActivity
{
Map<String, String> map = new HashMap<String, String>();
private EditText autocomplete_searchField;
private TextView displayField;
String note;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
autocomplete_searchField = (AutoCompleteTextView) findViewById(R.id.autocomplete_searchField);
// Gets a reference to the AutoCompleteTextView in the layout
final AutoCompleteTextView textView = (AutoCompleteTextView) findViewById(R.id.autocomplete_searchField);
// Gets the string array
String[] musicNote = getResources().getStringArray(R.array.music_notes_array);
// Creates the adapter and set it to the AutoCompleteTextView
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, musicNote);
textView.setAdapter(adapter);
displayField = (TextView) findViewById(R.id.displayField);
textView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id){
displayField.setText(map.get(adapterView.getItemAtPosition(position).toString()));
String note = autocomplete_searchField.getText().toString();
displayField.setText(map.get(note));
map.put("Doe", "a deer, a female deer");
map.put("Ray", "a drop of golden sun");
}
Most of the related solutions I've seen treat buttons, but not AutoCompleteTextView drop-down items. I've also tried setting focus both in my JAVA and XML but those didn't resolve the issue.

I didn't understand very well what you are trying to do, but looking in your code, I saw a couple of wrong things in it. Perhaps it is the problem. Moreover I added some lines into your code, so the here is it:
public class MainActivity extends ActionBarActivity {
private Map<String, String> map = new HashMap<String, String>();
private AutoCompleteTextView autocomplete_searchField;
private TextView displayField;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
autocomplete_searchField = (AutoCompleteTextView) findViewById(R.id.autocomplete_searchField);
displayField = (TextView) findViewById(R.id.displayField);
// Gets the string array
String[] musicNote = getResources().getStringArray(R.array.music_notes_array);
// Creates the adapter and set it to the AutoCompleteTextView
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, musicNote);
autocomplete_searchField.setAdapter(adapter);
autocomplete_searchField.setThreshold(1);
autocomplete_searchField.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
autocomplete_searchField.showDropDown();
}
});
autocomplete_searchField.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id){
displayField.setText(map.get(adapterView.getItemAtPosition(position).toString()));
}
}
}
}
Test it before do any change in order to realize if the issue was fixed. Then you do whatever you wanna do ;)

How to get onItemClickListener to produce a dropdown menu when an item in my listview is clicked in android?

I have my ListView set up and populated with an arraylist of strings, my question is how can I get another listview to dropdown when the "Liquid Type" in the ListView is clicked by the user
public class MainActivity extends ActionBarActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView mainList = (ListView) findViewById(R.id.add_drink);
ListView drinkType = (ListView) findViewById(R.id.drink_types);
ArrayList<String> mainListArray = new ArrayList<String>();
mainListArray.add("Liquid Type");
mainListArray.add("How Many?");
mainListArray.add("Amount");
mainListArray.add("Extra Calories");
ArrayAdapter<String> ad = new ArrayAdapter<String>(this, R.layout.list_adapter,R.id.text, mainListArray);
mainList.setAdapter(ad);
mainList.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
// argument position gives the index of item which is clicked
public void onItemClick(AdapterView<?> arg0, View v,int position, long arg3)
{
}
});
}

Have you looked at ExpandableListView
http://developer.android.com/reference/android/widget/ExpandableListView.html
What are you trying to do (use case)? The names you have in the list of main items kind of looks like an input form.
Maybe touching a single list item could display a context menu - see Using contextmenu with listview in android

Spinner data accept is mulfunctioning

I have a spinner which displays both options, but when I accept the female option, it still takes the answer as a male, any suggestions?
List<String> SpinnerArray = new ArrayList<String>();
SpinnerArray.add("Male");
SpinnerArray.add("Female");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, SpinnerArray);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
Spinner Items = (Spinner) findViewById(R.id.genderSpinner);
Items.setAdapter(adapter);
// Importing all assets like buttons, text fields
inputFullName = (EditText) findViewById(R.id.registerName);
String selected = Items.getSelectedItem().toString();
if (selected.equals("Male")) {
inputGen = "Male";
}
if (selected.equals("Female")){
inputGen = "Female";
}

Following the official guide:
public class SpinnerActivity extends Activity implements OnItemSelectedListener {
...
public void onItemSelected(AdapterView<?> parent, View view,
int pos, long id) {
// An item was selected. You can retrieve the selected item using
// parent.getItemAtPosition(pos)
}
public void onNothingSelected(AdapterView<?> parent) {
// Another interface callback
}
You can try a switch of position and then try your same conditions.

how to add item to Spinner's ArrayAdapter?

i had a EditText , a button and a spinner . When click the button , the spinner will add a new item with name you entered in the EditText. But here is the question, my adapter.add() method seems doesn't work...here is my code:
public class Spr extends Activity {
Button bt1;
EditText et;
ArrayAdapter<CharSequence> adapter;
Spinner spinner;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
bt1 = (Button)this.findViewById(R.id.bt1);
et = (EditText)this.findViewById(R.id.et);
spinner = (Spinner)this.findViewById(R.id.spr);
adapter = ArrayAdapter.createFromResource(
this, R.array.planets_array, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
bt1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String temp = et.getText().toString();
adapter.add(temp);
adapter.notifyDataSetChanged();
spinner.setAdapter(adapter);
}
});
spinner.setOnItemSelectedListener(new Spinner.OnItemSelectedListener(){
#Override
public void onItemSelected(AdapterView<?> parent, View view,
int pos, long id) {
Toast.makeText(parent.getContext(), "The planet is " +
parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}});
}
}
thanks! ...still waitting

When you have created your ArrayAdapter you haven't assigned a resizeable List to it, so when you do add() it cannot increment the size of it and throws a UnsupportedOperationException.
Try something like this:
List<CharSequence> planets = new ArrayList<CharSequence>();
adapter = new ArrayAdapter<CharSequence>(context,
R.array.planets_array, planets);
//now you can call adapter.add()
You should use a List. With an Array such as CharSequence[] you would get the same UnsupportedOperationException exception.

Javi is right except don't reference an array for the second parameter.
adapter = new ArrayAdapter<CharSequence>(this,
android.R.layout.simple_spinner_item,
someList);

I believe this is working as designed, but not as expected. ArrayAdapter used to only take an array, but the list constructor was added later. I'm guessing its just doing a toArray() on your list. This is why you have to either call add on the adapter, or create a new adapter when your List changes.

you can create an arraylist and copy all recourse to this object then create arrayadaptor and send this arraylist and in onclicklistener of button, add edittext content to arraylist object then call notifydatasetchanged of adator