Reputation: 449

Spinner item gets automatically selected upon entering activity. How do I avoid this?

I have a spinner in my Android app, and its onItemSelected() event automatically gets triggered upon entering the activity.

How do I avoid this?

Upvotes: 21

Answers (9)

هيثم

Reputation: 1071

I think that you can use spinner position which is a better approach in my opinion. Create a global variable where you store the spinner position, in onItemSelected method the position is provided you can compare them, if they are the same do not make an action.

    private int spinnerPosition; \\ Global variable

     mySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int position, long id) {
               if(spinnerPosition != position){
               // Do whatever you like

               // Do not forget to save the new position
                spinnerPosition = position;
               }

            @Override
            public void onNothingSelected(AdapterView<?> adapterView) {

            }
        });

Upvotes: 0

Jerry Abraham

Reputation: 1039

I have solved this issue, You can avoid this issue by not setting any default values to the spinner

        int initialposition=spinner.getSelectedItemPosition();
        spinner.setSelection(initialposition, false);

This will avoid entering into onItemSelected()

Upvotes: 8

Syed Zeeshan

Reputation: 570

You can avoid it by ignoring the first click by,

private boolean isSpinnerInitial = true; //As global variable

public void onItemSelected(xxx xxx, xxx xxx, xxx xxx, xxx xxx) {
    if(isSpinnerInitial) {
        isSpinnerInitial = false;
        return;
    }
    // Write your code here
}

Upvotes: -2

Richard RJUK

Reputation: 533

To add on Jerry Abraham, You should clear selection before enabling setOnItemSelectedListener

  Spinner mSpinner=(Spinner)findViewById(R.id.mySpinner);
  int initialSelectedPosition=mSpinner.getSelectedItemPosition();
  mSpinner.setSelection(initialSelectedPosition, false); //clear selection
  mSpinner.setOnItemSelectedListener(this); //set listener after clearing section

Upvotes: 9

DarckBlezzer

Reputation: 4764

Simple and easy is this... validate with a boolean to see if is first time...

Spinner mySpinner = (Spinner)findViewById(R.id.spinner_xml_pro);
        mySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                if(isSpinnerInitial){ // globar var boolean isSpinnerInitial = false;
                 //do something
               }else
                    isSpinnerInitial=true;
            }

            @Override
            public void onNothingSelected(AdapterView<?> adapterView) {

            }
        });

Check this with spinner.post(new Runnable()...) or this other my source

Upvotes: 0

thanhbinh84

Reputation: 18454

We can use a flag, and just enable it when the spinner is really touched.

private boolean isSpinnerTouched = false; 

spinner.setOnTouchListener(new OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent event) {
                isSpinnerTouched = true;
                return false;
            }
        });
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
                @Override
                public void onItemSelected(AdapterView<?> adapter, View arg1,
                        int arg2, long arg3) {
                    if (!isSpinnerTouched) return;
                    // do what you want 
                    }
        });

Upvotes: 12

gregm

Reputation: 12159

Well, you can add a dummy selection to the initial adapter, and ignore position number in the setOnItemSelectedListener. It's not pretty but it works. See this code for setting up the items for an array adapter.

List<String> names = new ArrayList<String>();
names.add("");
names.addAll(realValues);

Then in your setOnItemSelectedListener you can do this:

    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id)
    {
        if (position > 0)
        {
            String name = names.get(position - 1);
        }
        else
        {
            Log.d(TAG, "selected nothing or perhaps the dummy value");
        }
    }

Upvotes: 1