I have reviewed several examples of how to set up a spinner in my program and they all use the same format that I am using, yet eclipse says that it is a syntax error, specifically: "Syntax error on token "setDropDownViewResource", identifier expected after this token. Additionally it says that the statement that sets the spinner adapter expects a variable declaratorid after the token "adapter"
here is the code block in question:
Spinner tipPercent = (Spinner) findViewById(R.id.tip_spinner);
ArrayAdapter<CharSequence> adapter = new ArrayAdapter(this,
R.array.tip_percentage, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
spinner.setAdapter(adapter);
What am I missing?
Initialize adapter ArrayAdapter instance as:
ArrayAdapter<CharSequence> adapter = new ArrayAdapter<CharSequence>(this,
R.array.tip_percentage, android.R.layout.simple_spinner_item);
Related
I have got two spinners that receive a default value as a variable from another view. The first one is working fine but the second one not (it shows position 0 as the default value). Here is my code:
Spinner spinner = (Spinner) findViewById(R.id.lista_origen);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(Main2Activity.this,
R.array.l_source, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setSelection(adapter.getPosition(l_source));
Spinner spinner2 = (Spinner) findViewById(R.id.lista_destino);
ArrayAdapter<CharSequence> adapter2 = ArrayAdapter.createFromResource(Main2Activity.this,
R.array.l_source, android.R.layout.simple_spinner_item);
adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner2.setAdapter(adapter2);
spinner2.setSelection(adapter2.getPosition(l_target));
l_target and l_source are the variables and they are correctly sent from the previous view to this one.
I would be grateful if you could find what and why is failing.
Thank you for your time.
I have made various string-arrays in the string.xml file and I have to set different arrays as entries for the spinner according to certain condition in Java. Is it possible or is database the only way to do so. Thanks in advance.
You need to use an adapter and populate with tha array in xml file.
Specify the name of your array in xml at createFromResource method (second parameter).
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.my_array, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
mySpinner.setAdapter(adapter);
You have to extract your data from file:
String[] testArray = getResources().getStringArray(R.array.testArray);
Then, you have to inflate in the spinner:
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(
this, android.R.layout.simple_spinner_item, testArray );
mySpinner.setAdapter(spinnerArrayAdapter);
You can start with using ArrayAdapter, it is a simple class to populate spinner items programmatically.
String data[];
//... do your stuff to get populate this array
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(
this, android.R.layout.simple_spinner_item, data);
mySpinner.setAdapter(spinnerArrayAdapter);
You can also modify the view of dropdown items and customize them further by overriding this class.
I have am initializing an array adapter like so:
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getActivity(), -1, android.R.layout.simple_spinner_item);
But unfortunately, I keeping receiving the error:
java.lang.NullPointerException
at android.content.res.AssetManager.getResourceTextArray
I think this is because I am passing -1 as the lookup for my Array. The problem is I am creating the array programmatically AFTER this so I actually don't have a Array defined in R.Arrays.
Does anybody know how I can initialize the ArrayAdapter without having a defined Array XML file?
List<String> listLoadToSpinner = new ArrayList<String>();
ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(
mContext,
android.R.layout.simple_spinner_dropdown_item,
listLoadToSpinner);
P.S : It's better to initialize the Adapter once you have the Array and set that Adapter to Spinner.
I am trying to make "Select one" on Spinner. I saw all answer regarding this subject but I am still having some issues. Usual way of making custom spinner is:
ArrayAdapter<CharSequence> dataAdapter1 = ArrayAdapter.createFromResource(this, R.array.entries,
android.R.layout.simple_spinner_item);
dataAdapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner1.setAdapter(dataAdapter1);
spinner1.setAdapter(
new NothingSelectedSpinnerAdapter(
dataAdapter1,
R.layout.contact_spinner_row_nothing_selected,
this));
In this code I have to define R.array.entries in Strings.xml, but my app is populating spinner from MySQL and I am having a list grad[i]=json.getString("Grad");. How can I create this ArrayAdapter.createFromResource with that list instead of Entries that are defined in Strings.xml? Tnx
Query the data, put it in a List or Array and use this constructor of Array Adapter
ArrayAdapter<CharSequence> dataAdapter1 = new ArrayAdapter(this,
android.R.layout.simple_spinner_item, yourArrayOrList);
More here: http://developer.android.com/reference/android/widget/ArrayAdapter.html#ArrayAdapter(android.content.Context, int, java.util.List)
I'm trying to populate the spinner, but the application crashes on spiner.setAdapter(adapter)...
final Context c=this;
ArrayList<CountryItem> countriesArray = GetCountries1();
ArrayAdapter<CountryItem> adapter = new ArrayAdapter<CountryItem>(
c,android.R.layout.simple_spinner_item, countriesArray);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
final Spinner spiner=(Spinner)findViewById(R.id.spinner1);
spiner.setAdapter(adapter);
I can't find any errors here, and eclipse debug mode does not show anything usefull...
Here is the example from google...is it so much different than my code?
Spinner spinner = (Spinner) findViewById(R.id.spinner);
ArrayAdapter<CharSequence> 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);
What error do you get?
Did you check if the countriesArray has elements or if it is empty?
Is it working when you use, e.g., a simple string array? If yes, then the problem lies with the CountryItem objects.
Other than that, the only difference I see is that you pass the context as a final variable, but I don't know if this causes the error. Try to pass just this and see if it works.