Develop Reference

Using Spinner And List Views with setOnItemSelectedListener

I'm supposed to make a task , I have a spinner connected with a String array x , this array contains three values , so I want when clicking any choice of the spinner a specific list view will will give a specific three values and , this is my code :
public class Four extends ActionBarActivity {
String x [] = {"Jordan","Saudi Arabia", "Syria"};
String Jordan[] = {"Amman","Aqaba","Sarqa"};
String Saudi[] = {"Riyadh","Jeddah","Khobar"};
String Syria[] = {"Hems","Halab","Demashk"};
Spinner sp1 ;
ListView lv1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.four);
lv1 = (ListView)findViewById(R.id.listView1);
// Jordan List View
ArrayAdapter<String> jor = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,Jordan);
lv1.setAdapter(jor);
// Saudi Arabia List View
ArrayAdapter<String> saud = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,Saudi);
lv1.setAdapter(saud);
// Syria List View
ArrayAdapter<String> syr = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,Syria);
lv1.setAdapter(syr);
sp1 = (Spinner)findViewById(R.id.spinner1);
ArrayAdapter<String> a = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item , x);
sp1.setAdapter(a);
sp1.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
}

The thir parameter of onItemSelected() (int arg2 in your example, but I would suggest you rename them) is the position you selected in the Spinner. So you could implement that method like this:
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
{
if (position == 0)
lv1.setAdapter(jor);
else if (position == 1)
lv1.setAdapter(saud);
else if (position == 1);
lv1.setAdapter(syr);
}
Remember that all the variables involved (lv1, jor, saud, syr) must be defined as final to be used inside the anonymous class, e.g.
final ArrayAdapter<String> jor = ...
final ArrayAdapter<String> saud = ...

Display EditText items on Spinner selection

I have a group of items in spinner and on their click I want to show the respective text in EditText . How I can achieve this. I thought of using switch but it doesnot work for strings. I want someone to tell me right approach for doing this.
I want the EditText array(mysuburb) to respond accordingly to the Spinner items(mystate) click .
Code:-
String[] mysuburb =new String[]{"sub1" ,"sub2","sub3","sub4","sub5","sub6"};
String[] mystate= new String[]{"NSW","Victoria","Qld","NT","WA","SA"};
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this.getActivity(), R.layout.listrow, mystate);
// LTRadapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
state.setAdapter(adapter);
state.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1,int pos, long arg3) {
// TODO Auto-generated method stub
sstate = state.getSelectedItem().toString();
/* String sub= state.getItemAtPosition(0).toString();
if(sub=="sub1")
suburb.setText("sub1") ; */
suburb.setText(arg0.getItemAtPosition(pos).toString());
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});

state.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> adapterView, View view,int i, long l) {
sstate = state.getSelectedItem().toString();
suburb.setText(sstate);
}
}

Spinner dropdown list doesn't show

http://i.stack.imgur.com/HGsTw.jpg
This is the error I get and the app just crashes and shows nothing!.
PS:When I moved those last 4 lines of code from the OnCreate method to the beginning of the OnItemSelected method I get no errors and this layout (http://i.stack.imgur.com/1DiLI.jpg) shows but no dropdown lists (I expect a list of colors when I click the arrow button next to background).
Here is my code:
public class SetLayout extends Activity implements OnItemSelectedListener {
TextView o_markertv, x_markertv, bcktv, gridtv;
String[] colors ={"Red", "Green", "Blue", "Black", "White"};
Spinner spinner1, spinner2, spinner3, spinner4;
LinearLayout bck;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.setlayout);
bck= (LinearLayout) findViewById(R.id.bck);
o_markertv= (TextView) findViewById(R.id.o_markertv);
x_markertv= (TextView) findViewById(R.id.x_markertv);
bcktv= (TextView) findViewById(R.id.bcktv);
gridtv= (TextView) findViewById(R.id.gridtv);
spinner1 = (Spinner) findViewById(R.id.spinner1);
spinner2 = (Spinner) findViewById(R.id.spinner2);
spinner3 = (Spinner) findViewById(R.id.spinner3);
spinner4 = (Spinner) findViewById(R.id.spinner4);
//Button BtnSubmit = (Button) findViewById(R.id.btnSubmit);
ArrayAdapter<String> adapter=new ArrayAdapter<String> (SetLayout.this,android.R.layout.simple_spinner_item,colors);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(adapter);
spinner1.setOnItemSelectedListener(this);
}
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
int position= spinner1.getSelectedItemPosition();
switch(position){ //red, green blue black white
case 0:
bck.setBackgroundColor(color.red);
break;
case 1:
bck.setBackgroundColor(color.green);
break;
case 2:
bck.setBackgroundColor(color.blue);
break;
case 3:
bck.setBackgroundColor(color.black);
break;
case 4:
bck.setBackgroundColor(color.white);
break;
}
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
}

Select item from spinner to show edittext

I am trying to show an EditText when a certain Item from a Spinner is selected. So far I have created the spinner and the EditText but I don't really know what my next step is.
I don't want to display the selection in the EditText, I just want to display the EditText field.
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText editText = (EditText) findViewById(R.id.edit_text_box);
editText.getText().toString();
}
public void addItemsOnSpinner()
{
spinner1 = (Spinner) findViewById(R.id.spinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource
(this, R.array.spinner_item, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter (adapter);
}
public void onItemSelected(AdapterView<?> spinner1, View view,int pos, long id)
{
editText.setText(spinner1.getSelectedItem());
}
This is also what I have in my string array + wish to only display the edittext box when item2 is selected
<string-array name="spinner_item">
<item>Item 1</item>
<item value="Item2">Item 2</item>
<item>Item 3</item>
<item>Item 4</item>
</string-array>

You should set visibility of editText to invisible or gone in XML, depends on what suits your needs better. Then you can use following to make it appear:
public void onItemSelected(AdapterView<?> spinner1, View view, int pos, long id)
{
yourEditText.setVisibility(View.VISIBLE);
}

spinner1.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
int x = spinner1.getSelectedItemPosition();
valSel = items[x];
}
String spinner1val = spin1.getText().toString(); //extract value of text from spinner
EditText text = (EditText) findViewById(R.id.EditText1); //get id of EditText box
text.setText(spinner1val);
Alternatively, if you want to check the value of item selected in Spinner, the 'valsel' contains the value. Just Toast the valsel.

Get the selected values from the spinner,
String anyvariable=String.valueOf(spin.getSelectedItem());
Now you can show this String value in the edit text,
EditText text = (EditText) findViewById(R.id.your_text);
text.setText(anyvariable);

#Override
public void onItemSelected(AdapterView<?> month, View arg1,int arg2, long arg3) {
// TODO Auto-generated method stub
selectedMonth= month.getItemAtPosition(arg2).toString();
Log.d("Tag",""+selectedMonth);
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
//selected_item= arg0.getChildAt(1).toString();
}
});
selected_item contains the item ,so just set it to editView like
editView.setText(selected_item)

You have to set text on edittext onItemSelected . First do change as per MKJParekh Suggest.
public void onItemSelected(AdapterView<?> spinner1, View view,int pos, long id)
{
yourEditText.setText(spinner1.getSelectedItem())
}

EditText height1, weight1, height, weight; Spinner height_spinner,
weight_spinner; String heightInputString, weightInputString; Button
calculatebmi;
#Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_bmi);
// set your class members as they start out null.
// do this for all of them
height1 = (EditText) findViewById(R.id.idofheight1inxml);
height_spinner = (Spinner) findViewById(R.id.idofheightspinnerinxml);
....
// Show the Up button in the action bar.
setupActionBar();
setupSpinners(); }
void setupSpinners(){
height_spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView parent, View view, int position, long id) {
//I.E. if in the height spinner CM is selected I would like to hide the second height edittext field.
// I'm not sure if this is meant to be "height1" or "height"
if (position == 0){
height.setVisibility(View.GONE);
} else {
height.setVisibility(View.VISIBLE);
}
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
// if you want to add similar logic for weight spinner, do that with this :
weight_spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
// put your code here for weight spinner
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
}); }

Adding OnItemSelectedListener to Spinner

I have a button and a spinner (originally hidden). When user presses a button, spinner gets populated with items and becomes visible. Now I would like to add OnItemSelectedListener to the spinner. and I have tried many tutorials with no luck.
This is my OnCreate function
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button load_routes = (Button)findViewById(R.id.load_routes);
Spinner routes = (Spinner)findViewById(R.id.routes_list);
load_routes.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
load_routes(v);
}
});
routes.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
{
public void onItemSelected(AdapterView<?> arg0, View v, int position, long id)
{
Log.v("routes", "route selected");
}
public void onNothingSelected(AdapterView<?> arg0)
{
Log.v("routes", "nothing selected");
}
});
}
This is my load_routes function
private void load_routes(View v)
{
Spinner routes = (Spinner)findViewById(R.id.routes_list);
List<String> routes_list = RouteParser.get_routes();
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, routes_list);
routes.setAdapter(adapter);
TableRow list_of_routes_row = (TableRow)findViewById(R.id.list_of_routes_row);
list_of_routes_row.setVisibility(View.VISIBLE);
}
This set up does not work. The only way I got this to work is when I setup my listener as routes.setOnItemSelectedListener(this) Then I implement OnItemSelectedListener and include the functions neccessary. But I have multiple spinners and need to create separate listeners for different spinner. Any help will be appreciated. Thanks!

final String[] s2 = getResources().getStringArray(R.array.capteur_size);
final EditText ed = (EditText) findViewById(R.id.editTextCoC);
spinnerCoC = (Spinner) findViewById(R.id.spinnerCoC);
spinnerCoC.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
ed.setText(s2[arg2]);
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});

Declare your Spinner as field instantiate the listener once you do findViewById and use it wherever you want.