Android (Java) Learning Note 110:scrollview usage

Theoretical part

1, ScrollView, and Horizontalscrollview are added scroll bars for controls or layouts

2. The above two controls can only have one child, but it is not a container in the traditional sense

3. The above two controls can be nested with each other

4, the position of the scroll bar now the experimental result is: can be set by Layout_width and Layout_height

5, ScrollView used to set the vertical scroll bar, Horizontalscrollview for setting the horizontal scroll bar: Note that there is a property that scrollbars can set the direction of the scroll bar: But ScrollView set to horizontal is and set to none is the effect of the same, Horizontalscrollview set to vertical and none the same.

Code practices:

1<?xml version= "1.0" encoding= "Utf-8"?>2<scrollview xmlns:android= "Http://schemas.android.com/apk/res/android"3Android:id= "@+id/mscrollview"4Android:layout_width= "Fill_parent"5android:layout_height= "Wrap_content"6android:scrollbars= "Vertical" >7 8<LinearLayout9Android:layout_width= "Fill_parent"Tenandroid:layout_height= "Wrap_content" Oneandroid:orientation= "Vertical" > A  -<LinearLayout -Android:layout_width= "Fill_parent" theandroid:layout_height= "Fill_parent" -android:orientation= "Horizontal" > -  -<Button +Android:id= "@+id/opennetcard" -Android:layout_width= "Wrap_content" +android:layout_height= "Wrap_content" Aandroid:layout_weight= "1" atAndroid:text= "Turn on the wireless card"/> -  -<Button -Android:id= "@+id/closenetcard" -Android:layout_width= "Wrap_content" -android:layout_height= "Wrap_content" inandroid:layout_weight= "1" -Android:text= "Turn off the wireless card"/> to  +<Button -Android:id= "@+id/checknetcardstate" theAndroid:layout_width= "Wrap_content" *android:layout_height= "Wrap_content" $android:layout_weight= "1"Panax Notoginsengandroid:text= "Check NIC status"/> -</LinearLayout> the  +<LinearLayout AAndroid:layout_width= "Fill_parent" theandroid:layout_height= "Fill_parent" +android:orientation= "Horizontal" > -  $<Button $Android:id= "@+id/scan" -Android:layout_width= "Wrap_content" -android:layout_height= "Wrap_content" theandroid:layout_weight= "1" -android:text= "Scan Network"/>Wuyi  the<Button -Android:id= "@+id/getscanresult" WuAndroid:layout_width= "Wrap_content" -android:layout_height= "Wrap_content" Aboutandroid:layout_weight= "1" $android:text= "Scan results"/> -</LinearLayout> -  -<LinearLayout AAndroid:layout_width= "Fill_parent" +android:layout_height= "Fill_parent" theandroid:orientation= "Horizontal" > -  $<Button theAndroid:id= "@+id/connect" theAndroid:layout_width= "Wrap_content" theandroid:layout_height= "Wrap_content" theandroid:layout_weight= "1" -android:text= "Connected WiFi"/> in  the<Button theAndroid:id= "@+id/disconnect" AboutAndroid:layout_width= "Wrap_content" theandroid:layout_height= "Wrap_content" theandroid:layout_weight= "1" theandroid:text= "Disconnect WiFi"/> +  -<Button theAndroid:id= "@+id/checknetworkstate"BayiAndroid:layout_width= "Wrap_content" theandroid:layout_height= "Wrap_content" theandroid:layout_weight= "1" -android:text= "WiFi connection status"/> -</LinearLayout> the  the<TextView theAndroid:id= "@+id/scanresult" theAndroid:layout_width= "Fill_parent" -android:layout_height= "Wrap_content"/> the</LinearLayout> the  the</ScrollView>

The layout diagram is as follows:

......

public void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.main);
}
......

Android (Java) Learning Note 110:scrollview usage