android - "Layout or its parent is useless". How to avoid this? -
i have 2 bordered textviews center vertically , horizontally, side side shown in following image:
on top of each of these 2 textviews, have add 't' textview on bottom left , unit on bottom right ('uv/m'). end following layout xml code:
<linearlayout android:id="@+id/layout_small_rectancle" android:layout_width="match_parent" android:layout_height="@dimen/drv3lite_small_rectangle_height" android:baselinealigned="false" android:layout_centervertical="true" android:orientation="horizontal" > <!-- small rectangles. defines whole width --> <relativelayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="center" android:orientation="vertical" > <!-- small rectangle (left) --> <relativelayout android:layout_width="@dimen/drv3lite_small_rectangle_width" android:layout_height="match_parent" android:orientation="vertical" > <textview android:id="@+id/lblvaluelte" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:textcolor="@color/color_green" android:textsize="@dimen/drv3lite_small_rectangle_text_size" android:textstyle="bold" android:text="1317" android:enabled="true" android:background="@drawable/selector_drv3lite_round_corners_lte"/> <!-- tag indicator --> <textview android:id="@+id/lbltaglte" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignparentbottom="true" android:gravity="start" android:layout_marginleft="5sp" android:layout_marginstart="5sp" android:textcolor="@color/color_green" android:textsize="18sp" android:textstyle="bold" android:text="t" /> <!-- units --> <textview android:id="@+id/lblunitslte" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignparentright="true" android:layout_alignparentend="true" android:layout_alignparentbottom="true" android:gravity="end" android:layout_marginright="5sp" android:layout_marginend="5sp" android:textcolor="@color/color_green" android:textsize="18sp" android:textstyle="bold" android:text="µv/m" /> </relativelayout> </relativelayout> <!-- small rectangles. defines whole width --> <relativelayout android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:gravity="center" > <!-- small rectangle (right) --> <relativelayout android:layout_width="@dimen/drv3lite_small_rectangle_width" android:layout_height="match_parent" android:orientation="vertical" > <textview android:id="@+id/lblvaluemid" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:textcolor="@color/color_orange" android:textsize="@dimen/drv3lite_small_rectangle_text_size" android:textstyle="bold" android:text="145" android:enabled="true" android:background="@drawable/selector_drv3lite_round_corners_mid"/> <!-- tag indicator --> <textview android:id="@+id/lbltagmid" android:layout_width="30sp" android:layout_height="wrap_content" android:layout_alignparentbottom="true" android:gravity="start" android:layout_marginleft="5sp" android:layout_marginstart="5sp" android:textcolor="@color/color_orange" android:textsize="18sp" android:textstyle="bold" android:text="t" /> <!-- units --> <textview android:id="@+id/lblunitsmid" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignparentright="true" android:layout_alignparentend="true" android:layout_alignparentbottom="true" android:gravity="end" android:layout_marginright="5sp" android:layout_marginend="5sp" android:textcolor="@color/color_orange" android:textsize="18sp" android:textstyle="bold" android:text="µv/m" /> </relativelayout> </relativelayout> </linearlayout> so:
- first level: layout_small_rectangle allows me center vertically;
- second level: 2 relativelayout weight of 1 allows me distribute evenly 2 textviews borders horizontally;
- third level: relative layout allows me align left/right 't' , 'uv/m' textviews inside bordered textview;
my question: possible avoid ide warning saying 'a layout useless', caused successive relativelayout of level 2 , 3?
you can remove 2 parent relativelayouts , apply weights children same effect.
<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/layout_small_rectancle" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_centervertical="true" android:baselinealigned="false" android:orientation="horizontal"> <!-- small rectangles. defines whole width --> <!-- small rectangle (left) --> <relativelayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:orientation="vertical"> <textview android:id="@+id/lblvaluelte" android:layout_width="match_parent" android:layout_height="match_parent" android:enabled="true" android:gravity="center" android:text="1317" android:textstyle="bold" /> <!-- tag indicator --> <textview android:id="@+id/lbltaglte" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignparentbottom="true" android:layout_marginleft="5sp" android:layout_marginstart="5sp" android:gravity="start" android:text="t" android:textsize="18sp" android:textstyle="bold" /> <!-- units --> <textview android:id="@+id/lblunitslte" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignparentbottom="true" android:layout_alignparentend="true" android:layout_alignparentright="true" android:layout_marginend="5sp" android:layout_marginright="5sp" android:gravity="end" android:text="µv/m" android:textsize="18sp" android:textstyle="bold" /> </relativelayout> <!-- small rectangles. defines whole width --> <!-- small rectangle (right) --> <relativelayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:orientation="vertical"> <textview android:id="@+id/lblvaluemid" android:layout_width="match_parent" android:layout_height="match_parent" android:enabled="true" android:gravity="center" android:text="145" android:textstyle="bold" /> <!-- tag indicator --> <textview android:id="@+id/lbltagmid" android:layout_width="30sp" android:layout_height="wrap_content" android:layout_alignparentbottom="true" android:layout_marginleft="5sp" android:layout_marginstart="5sp" android:gravity="start" android:text="t" android:textsize="18sp" android:textstyle="bold" /> <!-- units --> <textview android:id="@+id/lblunitsmid" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignparentbottom="true" android:layout_alignparentend="true" android:layout_alignparentright="true" android:layout_marginend="5sp" android:layout_marginright="5sp" android:gravity="end" android:text="µv/m" android:textsize="18sp" android:textstyle="bold" /> </relativelayout> 
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