Android Development Common Properties Encyclopedia

1, Android string.xm L text in the middle add space

Android STRING.XM l plus space tips

<string name= "password" > Password </string>

This is a space.

2, Text line display

TextView, EditView single-line display and input in the Android layout layout file

<textview android:singleline= "true"/>: Text single-line display

<editview android:singleline= "True"/>: text input box single line input

Android:singleline= "true" single-line display

3, EditView input Box Properties

EditView password input and digital input control in Android layout layout file

<editview android:password= "true"/>: input data for text input box not shown directly

<editview android:numeric= "integer"/>: input data for a text input box can only be a number

android:numeric= "integer" Digital input control, android:password= "true": password content hiding

4, EditView input content Tips

Android Layout layout file EditView input content hint

<editview android:hint= "@string/in put_pwd"/>: Display a hint in a text entry box

Android:hint= "@string/in put_pwd" When the input box gets focus, the default display disappears

5, EditView input length control

EditView input Length control in Android layout layout file

<editview android:minlength= "5"/>: Set minimum input for text input box

<editview android:maxlength= "Ten"/>: Sets the maximum input for the text input box

MinLength, MaxLength: input Length control

6, Control Display control

Control display control in Android layout layout file

Android:visibility= "Gone": Control is gone

Android:visibility= "Invisible": control is not visible, but exists

android:visibility= "visible": control appears normally, system defaults

7. Typesetting control in Layout document

Relativelayout, LinearLayout, ListView internal control typesetting control in the Android layout layout file

android:orientation= "Vertical": Vertical layout

android:orientation= "Horizontal": Horizontal layout

8, the application of horizontal screen, vertical screen display

Android androidmanifest.xm l file settings apply display orientation

Android:screenorientation= "Portrait": Vertical screen Display

9, go to the title control

Android ANDROIDMANIFEST.XM L file setup activity untitled

Android:theme= "@android: Style/theme.notitlebar": Do not display titles

10. Android Layout Properties

Some of the important properties used by Relativelayout, the property value is True or False

Android:layout_centerhrizontal Horizontal Center

Android:layout_centervertical Vertical Center

Android:layout_centerinparent is completely centered relative to the parent element

Android:layout_alignparentbottom snaps to the bottom edge of the parent element

Android:layout_alignparentleft snaps to the left edge of the parent element

Android:layout_alignparentright snaps to the right edge of the parent element

Android:layout_alignparenttop snaps to the top edge of the parent element

android:layout_alignwithparentifmissing if the corresponding sibling element is not found, use the parent element as a reference