I have within a TabActivity a Spinner that will be generated dynamically. Just to test, I did so manually:
Spinner sp_departure = (Spinner) findViewById(R.id.spinner_departure);
// This array will be generated through a database
String[] array_spinner = new String[2];
array_spinner[0] = "Departure 1";
array_spinner[1] = "Departure 2";
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, array_spinner);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
sp_departure.setAdapter(adapter);
When I run the app looks ok since option selected is "Departure 1" but when I click to open the options I get some errors and the application is closed.
Any idea what could be wrong?
Thanks in advance.
- Update
This is what was generated by LogCat: http://pastebin.com/1QPKZdKB
Yes you might have set setContetView(R.layout.yourxml)...,
Change it to :
View viewToLoad = LayoutInflater.from(this.getParent()).inflate(R.layout.yourxm, null);
this.setContentView(viewToLoad);
and use
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getParent(), android.R.layout.simple_spinner_item, array_spinner);
Try, it may helps you
Related
I have Spinner in my app and set String[] programmatic.
speciality = (Spinner) findViewById(R.id.general_specality_s);
specialityadapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, speciality_list);
speciality.setAdapter(specialityadapter);
and get selected string like this speciality.getSelectedItem().toString(); and store in sqlite. Now I want to get that value from sqlite and need to set in Spinner1.
String SpinnerText=c.getString(c.getColumnIndex("speciality"));
How to set this string to speciality / Spinner ? Thanks in advance.
Fetch your data into an array and use an array adapter
String[] spinnerArray = your data goes here;
Spinner spinner = (Spinner)findViewById(R.id.yourspinnerid);
ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, spinnerArray);
spinnerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(spinnerAdapter);
How can i populate a Spinner from String array , I know i can do that from array.xml like this code :
ArrayAdapter<CharSequence> gameKindArray = ArrayAdapter.createFromResource(view.getContext(),R.array.game_kind, android.R.layout.simple_spinner_item);
gameKindArray.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
gameKind.setAdapter(gameKindArray);
but when i have
String[] test=new String[]{"test1","test2"};
how i can change String[] to ArrayAdapter ?!
Use ArrayAdapter this way
your string array
String[] test=new String[]{"test1","test2"};
your ArrayAdapter
ArrayAdapter<String> gameKindArray= new ArrayAdapter<String>(MyActivityClass.this,android.R.layout.simple_spinner_item, test);
gameKindArray.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
gameKind.setAdapter(gameKindArray);
Try the below
ArrayAdapter<String> gameKindArray = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, test);
gameKind.setAdapter(adapter);
For more info check the docs.
http://developer.android.com/reference/android/widget/ArrayAdapter.html
http://developer.android.com/reference/android/widget/Spinner.html
you dont need to convert in any form just use your string array like below:
ArrayAdapter<String> gameKindArray= new ArrayAdapter<String>(MyActivityClass.this,android.R.layout.simple_spinner_item, test);
gameKindArray.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
gameKind.setAdapter(gameKindArray);
you can get easily into spinner.
I have two spinners and two arrays. However, one spinner receives both arrays while the other receives no values from either of the two arrays. Note: I do not want to use radio buttons as the data is shortened for review.
final ArrayList<String> serialnums = new ArrayList<String>();
serialnums.add("576798");
serialnums.add("495874");
serialnums.add("345667");
serialnums.add("956345");
final ArrayList<String> carrys = new ArrayList<String>();
serialnums.add("R");
serialnums.add("L");
serialnums.add("F");
serialnums.add("B");
s1 = (Spinner) findViewById(R.id.spinnerSerial);
spinnerCarry = (Spinner) findViewById(R.id.spinnerCarry);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, serialnums );
ArrayAdapter<String> adapterCarrys = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, carrys );
s1.setAdapter(adapter);
spinnerCarry.setAdapter(adapterCarrys);
Note 2: Spinner s1 gets all the data
One spinner has all the data because you are assigning all the data to it. Change this:
final ArrayList<String> carrys = new ArrayList<String>();
serialnums.add("R");
serialnums.add("L");
serialnums.add("F");
serialnums.add("B");
to this:
final ArrayList<String> carrys = new ArrayList<String>();
carrys.add("R");
carrys.add("L");
carrys.add("F");
carrys.add("B");
You are adding "R" "L" "F" "B" to serialnums add it to carrys
I just trying to set value to spinner manually by using ArrayAdapter,
String[] array_string = new String[5];
array_string [0] = "1";
array_string [1] = "2";
array_string [2] = "3";
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, array_spinner);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
when i run this code the first element of the array_string i mean (array_string [0] = "1";) value alone displayed in the Spinner when i click spinner for list of items it raising null pointer exception.
You have two null cells in the array (size = 5, set = 3), change this:
String[] array_string = new String[5];
to
String[] array_string = new String[3];
or assign values to array_string[3] and array_string[4]
Well, there are 2 errors:
(1) your 5th line should probably be:
ArrayAdapter adapter = new ArrayAdapter(this, android.R.layout.simple_spinner_item, array_string);
...i.e. array_spinner is not an array you declared in your snippet.
(2) You did not initialize all elements of array_string to an actual string immutable value. This means that array_string[3], array_string[4] are null, therefore raising this null pointer error you speak of.
This question already has answers here:
How to make an Android Spinner with initial text "Select One"?
(36 answers)
Closed 9 years ago.
The first year from the data array is shown instead of the text from prompt in my spinner. I tried adding the prompt in XML, but I also tried from code. Furthermore, it gives me a "resource not found error", when adding the spinnerSelector attribute.
XML
<Spinner
android:id="#+id/spinnerYear"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_marginLeft="10dip"
android:layout_marginRight="10dip"
android:drawSelectorOnTop="true"
android:padding="5dip"
android:prompt="#string/spinner_header"
android:background="#drawable/selector_yearspinnerback"
android:layout_below="#+id/linearLayout_gender_btns"
android:layout_centerHorizontal="true"></Spinner>
-- android:spinnerSelector="#drawable/category_arrow"
Code
ArrayList<String> yearList = new ArrayList<String>();
int now = new Date().getYear() + 1900;
for (int i = now; i > now - 110; i--) {
yearList.add(i + "");
}
Spinner spinner = (Spinner) findViewById(R.id.spinnerYear);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, yearList);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
Perhaps you are seeing the spinner drop down items as list without any prompt text. There are two modes in which spinner shows the items, dropdown and dialog.
Add this attribute to your spinner as an XML atrtribute:
android:spinnerMode="dialog"
And you will now get items in a popup dialog select list instead of drop down list.
You have to set adapter.setDropDownViewResource (android.R.layout.simple_spinner_dropdown_item); after
spinner.setAdapter(adapter);
So the fixed code would be:
ArrayList<String> yearList = new ArrayList<String>();
int now = new Date().getYear() + 1900;
for (int i = now; i > now - 110; i--) {
yearList.add(i + "");
}
Spinner spinner = (Spinner) findViewById(R.id.spinnerYear);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, yearList);
spinner.setAdapter(adapter);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
(I hope it works for you like it works for me :D!)
For me, both android:prompt XML attibute as well as Spinner.setPrompt work, and list selector displays correct title.
Try to find bug in your code, or make call to Spinner.getPrompt at some point and print this to log, to find our from where you get invalid title.