Modifying the screen direction for Android Development

In some scenarios, we need to change the screen direction of the mobile phone. Below is an example I wrote.

Xml page file:

Xmlns: tools = "http://schemas.android.com/tools"

Android: layout_width = "match_parent"

Android: layout_height = "match_parent"

Android: paddingBottom = "@ dimen/activity_vertical_margin"

Android: paddingLeft = "@ dimen/activity_horizontal_margin"

Android: paddingRight = "@ dimen/activity_horizontal_margin"

Android: paddingTop = "@ dimen/activity_vertical_margin"

Tools: context = ". MainActivity">

Android: id = "@ + id/btn"

Android: layout_width = "wrap_content"

Android: layout_height = "wrap_content"

Android: layout_alignParentLeft = "true"

Android: layout_alignParentTop = "true"

Android: text = "modifying the screen direction"/>

Page java file:

Package com. example. chcfg;

Import android. OS. Bundle;

Import android. app. Activity;

Import android. content. pm. ActivityInfo;

Import android. content. res. Configuration;

Import android. view. View;

Import android. view. View. OnClickListener;

Import android. widget. Button;

Import android. widget. Toast;

Public class MainActivityextends Activity {

@ Override

Protected void onCreate (Bundle savedInstanceState ){

Super. onCreate (savedInstanceState );

SetContentView (R. layout. activity_main );

Button btn = (Button) findViewById (R. id. btn );

Btn. setOnClickListener (new OnClickListener ()

{

Publicvoid onClick (View source ){

// TODO Auto-generated method stub

Configuration config = getResources (). getConfiguration ();

If (config. orientation = Configuration. ORIENTATION_LANDSCAPE)

{

// Set to portrait

MainActivity. this. setRequestedOrientation (ActivityInfo. SCREEN_ORIENTATION_PORTRAIT );

}

// If the current screen is a portrait Screen

If (config. orientation = Configuration. ORIENTATION_PORTRAIT)

{

MainActivity. this. setRequestedOrientation (ActivityInfo. SCREEN_ORIENTATION_LANDSCAPE );

}

}

});

}

@ Override

Public void onConfigurationChanged (Configuration newConfig ){

// TODO Auto-generated method stub

Super. onConfigurationChanged (newConfig );

String screen = newConfig. orientation = Configuration. ORIENTATION_LANDSCAPE? "Horizontal screen": "portrait screen ";

Toast. makeText (this, "the direction of the System screen has changed \ n:" + screen, Toast. LENGTH_LONG). show ();

}

}

MainFest xml file:

Package = "com. example. chcfg"

Android: versionCode = "1"

Android: versionName = "1.0" type = "codeph" text = "/codeph">

Android: minSdkVersion = "8"

Android: targetSdkVersion = "18"/>

Android: allowBackup = "true"

Android: icon = "@ drawable/ic_launcher"

Android: label = "@ string/app_name"

Android: theme = "@ style/AppTheme">

Android: name = "com. example. chcfg. MainActivity"

Android: label = "@ string/app_name"

Android: configChanges = "orientation">

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