set Android ZoomButtonsController alignment?

问题

Im implementing a ZoomButtonsController in my custom View and have been trying to figure out how to align it to the bottom right hand corner of the screen (it aligns to the bottom middle by default) but havent had any luck.

回答1:

ZoomButtonsController can be defined in XML files and can be positioned accordingly , for eg.

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

<ZoomControls android:id="@+id/zoomControls1" 
          android:layout_height="wrap_content" 
          android:layout_width="wrap_content" 
          android:layout_alignParentTop="true"
          android:layout_alignParentRight="true">
</ZoomControls>

</RelativeLayout>

This layout will make your zoomcontrols in top-right of the screen as defined by the attributes ,

android:layout_alignParentTop="true"
android:layout_alignParentRight="true"

so basically you can align your views by nesting them in a Layout (like RelativeLayout , LinearLayout etc.)

来源：https://stackoverflow.com/questions/7294598/set-android-zoombuttonscontroller-alignment