Fixed Screen Display in Android development!

When I learned the jetboy code, I found that the screen was rotated. The scanning Code did not find the relevant settings and found the relevant code in manifest. xml:
Java code
<Manifest xmlns: Android = "http://schemas.android.com/apk/res/android"
Package = "com. example. Android. jetboy" Android: versioncode = "1"
Android: versionname = "1.0.0">
<Application Android: icon = "@ drawable/icon"
Android: Label = "@ string/app_name"
Android: theme = "@ Android: style/theme. notitlebar">
<Activity Android: Name = ". jetboy"
Android: Label = "@ string/app_name"
Android: screenorientation = "portrait"
>
<Intent-filter>
<Action Android: Name = "android. Intent. Action. Main"/>
<Category
Android: Name = "android. Intent. Category. launcher"/>
</Intent-filter>
</Activity>
</Application>

<Uses-SDK Android: minsdkversion = "4"> </uses-SDK>
<! --
<Uses-library Android: Name = "android. Test. Runner"/>
<Instrumentation
Android: Name = "android. Test. instrumentationtestrunner"
Android: targetpackage = "com. example. Android. jetboy"
Android: functionaltest = "true" Android: Label = "jetboy test all runner"/>
<Uses-Permission Android: Name = "android. Permission. run_instrumentation"/>
-->
</Manifest>

<Manifest xmlns: Android = "http://schemas.android.com/apk/res/android"
Package = "com. example. Android. jetboy" Android: versioncode = "1"
Android: versionname = "1.0.0">
<Application Android: icon = "@ drawable/icon"
Android: Label = "@ string/app_name"
Android: theme = "@ Android: style/theme. notitlebar">
<Activity Android: Name = ". jetboy"
Android: Label = "@ string/app_name"
Android: screenorientation = "portrait"
>
<Intent-filter>
<Action Android: Name = "android. Intent. Action. Main"/>
<Category
Android: Name = "android. Intent. Category. launcher"/>
</Intent-filter>
</Activity>
</Application>

<Uses-SDK Android: minsdkversion = "4"> </uses-SDK>
<! --
<Uses-library Android: Name = "android. Test. Runner"/>
<Instrumentation
Android: Name = "android. Test. instrumentationtestrunner"
Android: targetpackage = "com. example. Android. jetboy"
Android: functionaltest = "true" Android: Label = "jetboy test all runner"/>
<Uses-Permission Android: Name = "android. Permission. run_instrumentation"/>
-->
</Manifest>
Find this code: Android: screenorientation = "portrait"
Portrait indicates horizontal, and landscape indicates vertical

To make the View Interface of the activity full screen, you only need to hide the top signal bar and the title bar of the activity to hide the code in the title bar:
Requestwindowfeature (window. feature_no_title );

Code in the configuration file:
Android: theme = "@ Android: style/theme. notitlebar"

Code for hiding the signal bar:
Getwindow (). setflags (windowmanager. layoutparams. flag_fullscreen, windowmanager. layoutparams. flag_fullscreen );

Other usage:
Getwindow (). setflags (windowmanager. layoutparams. type_status_bar, windowmanager. layoutparams. type_status_bar );