Common properties for Android development

1. Add spaces between text in android string.xml

Tips for adding spaces before and after android string.xml

<string name="password">Password&#160;&#160;&#160;&#160;Code</string>

&#160 This represents a space

2. Single-line text display

TextView, EditView single line display and input in android layout file

<TextView android:singleLine="true"/>: Text is displayed in a single line

<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 number input control in android layout file

<EditView android:password="true"/>: The input data of the text input box is not displayed directly

<EditView android:numeric="integer"/>: The input data of the text input box can only be numbers

android:numeric="integer" digital input control, android:password="true": password content is hidden

4. EditView input content prompt

EditView input content prompt in android layout file

<EditView android:hint="@string/input_pwd"/>: Displays the prompt content in the text input box

android:hint="@string/input_pwd"When the input box gets the focus, the default displayed content disappears

5. EditView input length control

EditView input length control in android layout file

<EditView android:minLength="5"/>: Sets the minimum input length of the text input box

<EditView android:maxLength="10"/>: Sets the maximum input length of the text input box

minLength, maxLength: input length control

6. Control display control

Control display control in android layout file

android:visibility="gone": The control is gone

android:visibility="invisible": The control is invisible but exists

android:visibility="visible": The control is displayed normally, the system default value

7. Typesetting control in layout files

Layout control of RelativeLayout, LinearLayout, and ListView internal controls in android layout files

android:orientation="vertical": vertical layout

android:orientation="horizontal": horizontal layout

8. Application horizontal and vertical screen display

android AndroidManifest.xml file sets the application display direction

android:screenOrientation="portrait": vertical screen display

9. Remove title control

android AndroidManifest.xml file sets Activity without title

android:theme="@android:style/Theme.NoTitleBar": Do not display the title