Android layout padding is ignored by dropdown

问题

As xml:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="20dp">

    <Button
        android:id="@+id/locationButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:minWidth="46dip"
        android:onClick="getLocation"
        android:text="@string/icon_map_marker" />

    <AutoCompleteTextView
        android:id="@+id/autocomplete_city"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:hint="@string/city_hint"
        android:inputType="text"
        android:layout_alignBottom="@+id/locationButton"
        android:layout_alignTop="@id/locationButton"
        android:layout_toLeftOf="@id/locationButton"
        android:dropDownWidth="match_parent"
        />

    <requestFocus />

</RelativeLayout>

As you can see the

android:dropDownWidth="match_parent"

ignores the padding of the relative layout. Any ideas how to fix this?

回答1:

Solved it. I had to define another relative layout wrapping only the autocomplete textview and the button. This layout is the anchor of the popup, taking the width of the relative layout as its own width.The key:

android:dropDownWidth="wrap_content"
android:dropDownAnchor="@+id/anchor"

Short version:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="20dp" >

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/anchor" >

        <Button
            android:id="@+id/locationButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true" />

        <AutoCompleteTextView
            android:id="@+id/autocomplete_city"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_alignBottom="@+id/locationButton"
            android:layout_alignTop="@id/locationButton"
            android:layout_centerHorizontal="true"
            android:layout_toLeftOf="@id/locationButton"
            android:dropDownWidth="wrap_content"
            android:hint="@string/city_hint"
            android:dropDownAnchor="@+id/anchor" />

        <requestFocus />

    </RelativeLayout>

</RelativeLayout>

回答2:

//try this
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="10dp">


    <AutoCompleteTextView
        android:id="@+id/autocomplete_city"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:hint="city_hint"
        android:inputType="text"
        android:dropDownWidth="match_parent"/>
    <Button
        android:id="@+id/locationButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:minWidth="46dip"
        android:onClick="getLocation"
        android:text="icon_map_marker" />
</LinearLayout>

来源：https://stackoverflow.com/questions/19914328/android-layout-padding-is-ignored-by-dropdown

标签

android

android-layout

android-listview