Planning for localization Add RTL support in Layouts
suggest changeStarting SDK 17 (Android 4.2), RTL support was added in Android layouts and is an essential part of localization. Going forward, the left/right
notation in layouts should be replaced by start/end
notation. If, however, your project has a minSdk
value less than 17
, then both left/right
and start/end
notation should be used in layouts.
For relative layouts, alignParentStart
and alignParentEnd
should be used, like so:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"/>
</RelativeLayout>
For specifying gravity and layout gravity, similar notation should be used, like so :
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left|start"
android:gravity="left|start"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right|end"
android:gravity="right|end"/>
Paddings and margins should also be specified accordingly, like so :
<include layout="@layout/notification"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="12dp"
android:layout_marginStart="12dp"
android:paddingLeft="128dp"
android:paddingStart="128dp"
android:layout_toLeftOf="@id/cancel_action"
android:layout_toStartOf="@id/cancel_action"/>
<include layout="@layout/notification2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginRight="12dp"
android:layout_marginEnd="12dp"
android:paddingRight="128dp"
android:paddingEnd="128dp"
android:layout_toRightOf="@id/cancel_action"
android:layout_toEndOf="@id/cancel_action"/>
Found a mistake? Have a question or improvement idea?
Let me know.
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