First, LinearLayout (linear layout)
Provides a model for the horizontal vertical arrangement of controls, and controls the relative size of individual controls in the layout by setting the weight layout parameters of the child controls
Small.
Horizontal (vertical) vertical (horizontal)
Fill-parent: Fills the entire screen
Wrap-content: Just right for the size of the control content
Alignment Gravity Value:
Top: Does not change size, position is placed on top of container
Bottom: Does not change size, position is placed at the bottom of the container
Left: does not change size, position is placed on container
Right: does not change size, position is placed on container
Center_vertical: Does not change size, position is placed in the vertical central part of the container
Center_horizontal: Does not change size, position is placed in the horizontal central part of the container
Center: does not change size, position is placed in the central part of the container's horizontal and vertical
Fill_vertical: If possible, the longitudinal extension can fill the container
Fiil_horizontal: If possible, the horizontal extension can fill the container
Fiil: If possible, vertical and horizontal extension fills the container
Second, absolutelayout (coordinate layout)
You can have child elements specify accurate x/Y coordinate values and display them on the screen. (0, 0) is the upper-left corner, and when you move down or to the right, the coordinate value
Become larger. Absolutelayout does not have a page border, allowing elements to overlap each other (although not recommended). We generally do not recommend the use of
Absolutelayout, unless you have a valid reason to use it, because it makes the interface code too rigid, so that on different devices may
Can't work very well.
android:layout_x= "40px"
Android:layout_y= "56px" to determine the position of the control
Third, relativelayout (relative layout)
Allows child elements to specify their location relative to other elements or parent elements (specified by ID). So you can align to the right, or up and down,
Or placed in the middle of the screen to arrange two elements. Elements are arranged sequentially, so if the first element is in the center of the screen, the relative
Other elements of this element will be arranged in the relative position of the center of the screen. If you use XML to specify this layout, before you define it
, the element being associated must be defined.
Android:layout_centerinparent, places the current control in the horizontal and vertical central part of the parent control
Android:layout_centerhorizontal to place the current control in the central part of the parent control's landscape
Android:layout_centervertical to place the current control in the central part of the parent control's portrait
Android:layout_alignparentbottom to align the bottom of the current control with the bottom of the parent control
Android:layout_alignparentleft to align the left and parent controls of the current control
Android:layout_alignparentright, aligns the right end of the current control with the right end of the parent control
Android:layout_alignparenttop to align the top of the current control with the top of the parent control
Android:layout_alignparentbottom to align the bottom of the current control with the bottom of the parent control
Android:layout_above the bottom of the control to the control of the given ID
Android:layout_below the top of the control to the control of the given ID
Android:layout_toleftof aligns the right edge of the control with the left edge of the control for the given ID
Android:layout_torightof aligns the left edge of the control with the right edge of the control for the given ID
Android:layout_alignbaseline the baseline of the control's baseline and the given ID of the control
Android:layout_alignbottom the bottom edge of the control with the bottom edge of the given ID control
Android:layout_alignleft aligns the left edge of the control with the left edge of the given ID control
Android:layout_alignright aligns the right edge of the control with the right edge of the given ID control
Android:layout_aligntop aligns the top edge of the given control with the top of the given ID control
android:layout_marginbottom/layout_marginleft/layout_marginright/layout_margintop= "30px"
Empty the corresponding pixel space at the bottom/left/right/top of the current control
Four, Framelayout (single frame layout)
Is the simplest of a layout object. It is customized as a blank alternate area on your screen, after which you can populate a single object
-for example, a picture you want to publish. All child elements will be fixed in the upper left corner of the screen; You cannot be a child in Framelayout
element to specify a location. The next child element will overwrite the padding directly above the previous child element, blocking them partially or completely (unless
The latter child element is transparent).
android:src= the "@drawable/" property specifies the file location of the desired picture, and when you display the picture with ImageView, you should also use
Android:src Specify the picture to display
V. Tablelayout (table layout)
Manage child controls in the form of rows, each of which behaves as a TableRow object, TableRow can also add child controls
Android:collapsecolumns= "n" hides the column N of the TableRow inside the Tablelayout
Android:stretchcolumns= "n" to set column n as an extensible column
Android:shrinkcolumns= "n" to set column N to be a shrinking column
Various alignment issues with Android layouts
