Learn relative layout of android & lt; RelativeLayout from scratch. 16. & gt;, android get layout

Learn relative layout of android <RelativeLayout. 16.> from scratch. android gets layout.
The relative layout manager refers to the placement of a widget by referring to other Widgets. You can control the placement of components in the upper, lower, left, and right positions of a specified reference component, these can be done directly through the properties provided by each component. The following describes the basic usage of each method.

No.	Attribute name	Corresponding rule constant	Description
1	Android: layout_below	RelativeLayout. BELOW	Placed under the specified component
2	Android: layout_toLeftOf	RelativeLayout. LEFT_OF	Placed on the left of the specified component
3	Android: layout_toRightOf	RelativeLayout. RIGHT_OF	Placed on the right of the specified component
4	Android: layout_alignTop	RelativeLayout. ALIGN_TOP	Align with specified components for Reference
5	Android: layout_alignBottom	RelativeLayout. ALIGN_BOTTOM	Align with specified components for Reference
6	Android: layout_alignLeft	RelativeLayout. ALIGN_LEFT	Align left with specified components for Reference
7	Android: layout_alignRight	RelativeLayout. ALIGN_RIGHT	Align right with specified components for Reference

<Span style = "font-size: 18px;"> <RelativeLayout xmlns: 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" android: paddingBottom = "@ dimen/activity_vertical_margin" android: paddingLeft = "@ dimen/plugin" android: paddingRight = "@ dimen/android" android: PaddingTop = "@ dimen/activity_vertical_margin" android: textAlignment = "center" tools: context = ". mainActivity "> <EditText android: id =" @ + id/editText1 "android: layout_width =" wrap_content "android: layout_height =" wrap_content "android: layout_alignParentRight =" true "android: layout_alignParentTop = "true" android: EMS = "10"/> <EditText android: id = "@ + id/editText2" android: layout_width = "wrap_content" android: la Yout_height = "wrap_content" android: layout_alignRight = "@ + id/editText1" android: layout_below = "@ + id/editText1" android: EMS = "10" android: inputType = "textPassword"> <requestFocus/> </EditText> <TextView android: id = "@ + id/textView1" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: layout_alignBottom = "@ + id/editText1" android: layout_alignParentLeft = "true" android: text = "Account" /> <TextView android: id = "@ + id/textView2" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: layout_alignBottom = "@ + id/editText2" android: layout_alignParentLeft = "true" android: text = "password" android: textAlignment = "center"/> <Button android: id = "@ + id/button1" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: layout_below = "@ + id/editText2" android: Layout_marginLeft = "23dp" android: layout_marginTop = "36dp" android: layout_toRightOf = "@ + id/textView2" android: text = "login"/> <TextView android: id = "@ + id/textView3" android: layout_width = "wrap_content" android: layout_height = "wrap_content" android: layout_alignBottom = "@ + id/button1" android: layout_marginLeft = "14dp" android: layout_toRightOf = "@ + id/button1" android: autoLink = "web" android: linksClickable = "true" Android: text = "forgot password" android: textAppearance = "? Android: attr/textAppearanceSmall "android: textSize =" 10dp "/> </RelativeLayout> </span>

Relative layout is currently the main layout method. It is more convenient and convenient than other methods. You can drag it directly on the visual interface.
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The use of dynamic table layout is the same as the previous one. It is not often used here and will not be repeated here. Interested readers can try it on their own. You need to use the following methods.

1	Public RelativeLayout. LayoutParams (int w, int h)	Structure	Specify the width and height of the RelativeLayout Layout
2	Public void addRule (int verb, int anchor)	Normal	Add specified parameter rules
3	Public int [] getRules ()	Normal	Obtains all the parameter rules of a component.

Next prediction: Use nested layout to implement the calculator Interface


RelativeLayout

<

RelativeLayout xmlns: android = "schemas.android.com/apk/res/android"

Android: layout_width = "fill_parent"

Android: layout_height = "fill_parent"

Android: background = "# fd8d8d"

Android: gravity = "center">

<Button

Android: id = "@ + id/button"

Android: layout_width = "wrap_content"

Android: layout_height = "wrap_content"

Android: layout_centerVertical = "true"

Android: text = "BUTTON"

Android: textSize = "16sp"/>

<Button

Android: id = "@ + id/button2"

Android: layout_width = "wrap_content"

Android: layout_height = "wrap_content"

Android: layout_below = "@ id/button"

Android: layout_toRightOf = "@ id/button"

Android: text = "BUTTON2"

Android: textSize = "16sp"/>

<Button

Android: id = "@ + id/button1"

Android: layout_width = "wrap_content"

Android: layout_height = "wrap_content"

Android: layout_above = "@ id/button"

Android: layout_toRightOf = "@ id/button"

Android: text = "BUTTON1"

Android: textSize = "16sp"/>

</

RelativeLayout>... the remaining full text>

Relativelayout layout in Android Development

You can see what layout you are using. If it is LinearLayout, the following controls are arranged with the distance between you. If it is RelativeLayout, You need to specify the method. There are many methods, such as android: layout_below and android: layout_abve, layout_alignParentRight, layout_toRightOf, or layout_toLeftOf