Thoughts on Android (16): Absolute layout absolutelayout, common distance units

Absolute layout absolutelayout, inherited from viewgroup, the size and location of subcomponents are defined entirely by the developer itself.

The sub-group price can specify the following two attributes:

Android:layout_x: Specifies the x-coordinate of the subassembly

Android:layout_y: Specifies the y-coordinate of the subassembly

Android Common distance units:

1. px(pixels): Each px corresponds to a point on the screen.

2. dip or dp(deviceindependent pixels, unit independent pixels) : An abstract unit based on screen density. On the monitor per inch ,1dip=1px. However, as the screen density changes,thedip and px conversion will change.

3. sp(scaled pixels, proportional pixels): Mainly handles the size of the font, which can be scaled according to the user's font size preference.

4. in(inches), standard length units.

5. mm(mm), standard length unit.

6. pt(lb): Standard length unit,1/72 inch.

Thoughts on Android (16): Absolute layout absolutelayout, common distance units