How to Preselect an Item in a Spinner Based on Value in Android?

Preselecting an Item in Spinner Based on Value

When updating a view, it's often necessary to preselect a value stored in a database for a Spinner control. The default approach using the Adapter's indexOf method is limited.

Instead, you can achieve this preselection by comparing the target value to the Spinner's items using an ArrayAdapter. Here's an example:

<code class="java">public void setSpinner(String value) {
    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.select_state, android.R.layout.simple_spinner_item);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

    if (value != null) {
        int spinnerPosition = adapter.getPosition(value);
        getSpinnerField().setSelection(spinnerPosition);
    }
}</code>

In this code:

• We create an ArrayAdapter using an appropriate resource file and style.
• We check if the target value is not null.
• If the value is valid, we find its position in the adapter using getPosition.
• Finally, we set the Spinner's selection to the found position.

This approach allows you to preselect an item in a Spinner based on the stored value, not by its position. It's a clean and efficient solution for updating views with specific data.

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