Android: Prevent different spinner heights (empty and filled)

adapter, android, layout, loader, spinner

Solution

I've just had this same issue and managed to fix it for myself so here's what I did.

I am inflating android.R.layout.simple_spinner_dropdown_item in my spinner adapter for each item layout. When I looked at this layout I noticed it had no margins but just a set height which was coming from android:attr/dropdownListPreferredItemHeight.

So I thought I'd get this list preferred item height value programatically and set it as my spinners minimum height. Using the answer to this stackoverflow question I was able to get the correct value and set it to my spinner.

    android.util.TypedValue value = new android.util.TypedValue();
    getActivity().getTheme().resolveAttribute(android.R.attr.listPreferredItemHeight, value, true);
    android.util.DisplayMetrics metrics = new android.util.DisplayMetrics();
    getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);
    float ret = value.getDimension(metrics);

    mSpinner.setMinimumHeight((int) (ret - 1 * metrics.density));

I've removed 1dip because it seems that the returned value has been rounded up which makes it 1 pixel too high.

Now all my spinner are the same height, whether they have items or are empty.

Problem

I have some spinners on the layout and use loader to load their data from db in background. The problems is that empty spinners have smaller height until the data are loaded. So the layout jump. How can I prevent this jumping? Edit (added spinner row layouts) Spinner row: ``` <?xml version="1.0" encoding="utf-8"?> <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/Text1" style="@style/StyleSpinner" android:layout_width="match_parent" android:layout_height="wrap_content" /> ``` Spinner drop down row: ``` <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="@dimen/style_spinner_row_padding" > <TextView android:id="@+id/Text1" style="@style/StyleSpinnerDropDownRow1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" /> <TextView android:id="@+id/Text2" style="@style/StyleSpinnerDropDownRow2" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/Text1" /> </RelativeLayout> ``` Assigned styles: ``` <!-- // Spinner // --> <style name="StyleSpinner" parent="AppTheme"> <item name="android:textStyle">bold</item> <item name="android:gravity">start</item> <item name="android:textSize">@dimen/default_text_size_normal</item> <item name="android:padding">@dimen/style_spinner_row_padding</item> </style> <style name="StyleSpinnerDropDownRow1" parent="AppTheme"> <item name="android:textStyle">bold</item> <item name="android:textSize">@dimen/default_text_size_normal</item> </style> <style name="StyleSpinnerDropDownRow2" parent="AppTheme"> <item name="android:textStyle">normal</item> <item name="android:textSize">@dimen/default_text_size_small</item> </style> ``` Screen shots:

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