Question

I have an ExpandableListView. The xml for the Child rows looks like this:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/list_item_child"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <EditText
            android:id="@+id/number_input_1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:gravity="right"
            android:inputType="numberDecimal" >

            <requestFocus />
        </EditText>

        <Spinner
            android:id="@+id/spinner_1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1" />
    </LinearLayout>

    <TextView
        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="@string/temp_txt" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <EditText
            android:id="@+id/number_input_2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:gravity="right"
            android:inputType="numberDecimal" />

        <Spinner
            android:id="@+id/spinner_2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1" />
    </LinearLayout>
</LinearLayout>

Basically, my getChildView looks like this:

public View getChildView(int i, int i1, boolean b, View view, ViewGroup viewGroup) {

    if (view == null) {
        view = inflater.inflate(R.layout.list_item_child, viewGroup, false);
    }      
    Spinner spinner = (Spinner) view.findViewById(R.id.spinner_1);
    spinner.setAdapter(mUnitsCA);
    spinner.setSelection(14);  // 14 is a test
    spinner.setOnItemSelectedListener(mSpinnerListener);

    return view;
}

This should ensure that item number 14 in spinner_1 is selected every time. Some of the time this works, but often it selects the first item in the spinner instead. I can’t work out where this is happening. Any ideas?

Answer 1

One recommendation I found was to change setSelection() to the following:

spinner.setSelection(14, true);

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Edit: (Building upon my answer for future seekers)

The documentation seems to be very vague on this, simply stating the following:

setSelection(int position, boolean animate);
//Jump directly to a specific item in the adapter data.

In my research it seems that many have had the same issues and from what I can tell declaring the animation boolean seems to be necessary more often then not, whether it be true or false. Maybe only custom animations or declared animation’s require a boolean value of true in order to animate but not having an animation will accept either true or false…