Question

I think the following is a basic problem.

I using this number Picker as there is none provided by Android SDK:
http://www.quietlycoding.com/?p=5&cpage=1#comment-10645

I have integrated it in an inflated alertdialog. Here the inflated layout:

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
>
    <com.example.NumberPicker
        android:padding="10dp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

I have added a button to the alertdialog. If it is clicked, I want to get the current value of the number picker.

The number picker class provides a function:

 public static int getCurrent() {
        return mCurrent;
    }

Problem is that I am not aware how to call it. I have no object of the class.
If I call it via com.example.NumberPicker.getCurrent(), I have to declare it static and this has some negative side-effects.

Does someone know how I get the object of the picker class in order to call the getCurrent() function?

I think simple to create a new object is not the right way, because I want to call the function from the running object in my alerdialog.

Edit:
As I have expected:

NumberPicker np = new NumberPicker(MainScreen.this);
Log.v("TEST", "" + np.getCurrent());

This gives me always 0

Edit 2:
I added an Android ID:

<com.example.NumberPicker
        android:id="@+id/numberPicker"
        android:padding="10dp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

I my code I do following:

    LayoutInflater factory = LayoutInflater.from(this);
            final View textEntryView = factory.inflate(
                    R.layout.backfall_layout, null);



            new AlertDialog.Builder(MainScreen.this)
                    .setTitle(this.getString(R.string.relapse))
                    .setView(textEntryView)
                    .setPositiveButton("OK",
                            new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog,
                                        int whichButton) {
                                NumberPicker np = (NumberPicker) findViewById(R.id.numberPicker);

                                Log.v("TEST", "" + np.getCurrent());

--

But now my App crashes after pressing the button..

Edit 3:

Solved it: I have to call

NumberPicker np = (NumberPicker) textEntryView.findViewById(R.id.cigarettesPicker);
            np.setCurrent(1);

Answer 1

Does someone know how I get the object of the picker class in order to call the getCurrent() function?

1. Add an android:id value to your NumberPicker element in your layout XML.

2. When you inflate the layout for your AlertDialog, call findViewById() on the inflated layout, passing in the ID you supplied in step #1, and casting the result to be a NumberPicker.