Android Learning-interface-layout-relativelayout

Relativelayout relative layout, all internal components are relative

XML properties

XML properties	Function	Description
Android:gravity	Setgravity	How the internal components are aligned
Android:ignoregravity	Setignoregravity	Set which component is not affected by gravity

Relativelayout.layoutparams used to set the alignment of internal components

XML properties	Description
Android:layout_centerhorizontal	Center horizontally
Android:layout_centervertical	Center vertically
Android:layout_centerinparent	Horizontal Vertical Center
Android:layout_alignparenttop	Layout up, down, left, left, right
Android:layout_alignparentbottom
Android:layout_alignparentright
Android:layout_alignparentleft

Code

<Relativelayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Xmlns:tools= "Http://schemas.android.com/tools"Android:layout_width= "Match_parent"Android:layout_height= "Match_parent"Tools:context= "${relativepackage}.${activityclass}" >    <ButtonAndroid:id= "@+id/button1"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:layout_centerhorizontal= "true"Android:text= "Center Horizontally" />        <ButtonAndroid:id= "@+id/button2"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"android:layout_centervertical= "true"Android:text= "Center Vertically" />        <ButtonAndroid:id= "@+id/button3"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"android:layout_centerinparent= "true"Android:text= "Vertical Horizontal Center" />        <ButtonAndroid:id= "@+id/button4"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:layout_alignparenttop= "true"Android:text= "Top of layout" />        <ButtonAndroid:id= "@+id/button5"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:layout_alignparentleft= "true"Android:layout_alignparentbottom= "true"Android:text= "layout left bottom" />        <ButtonAndroid:id= "@+id/button6"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:layout_alignparentright= "true"Android:text= "Layout Right" />    <ButtonAndroid:id= "@+id/button7"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"Android:layout_alignparentbottom= "true"Android:layout_alignparentright= "true"Android:text= "layout Right Bottom" /></Relativelayout>

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