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Editorial Team
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Asked: 2026-05-30T17:08:09+00:00

<?xml version=1.0 encoding=utf-8?> <LinearLayout xmlns:android=http://schemas.android.com/apk/res/android android:orientation=vertical android:layout_width=fill_parent android:layout_height=fill_parent> <ListView android:id=@android:id/list android:layout_width=fill_parent android:layout_height=fill_parent android:layout_weight=1 />

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <ListView android:id="@android:id/list" android:layout_width="fill_parent"
        android:layout_height="fill_parent" android:layout_weight="1" />
    <Spinner android:id="@+id/section_spinner"
        android:layout_width="fill_parent" android:layout_height="wrap_content"
        android:layout_margin="5dp" />
</LinearLayout>

what is the difference between @android:id and @id in this case?

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1 Answer

  1. Editorial Team

    You need to use @+id when you are defining your own Id to a view, which in this case is section_spinner. And @android:id is used when you need to set an Id of a view to android’s pre-defined Id in framework. for e.g when using ListActivity, TabWidget/FrameLayout in TabHost and etc.

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