Android Development Change screen orientation

In some scenarios, we need to change the screen direction of the mobile phone, here is a sample I wrote.

XML Paging File:

< Relativelayout xmlns:android="Http://schemas.android.com/apk/res/android"

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 ">

<Button

android:id="@+id/btn"

android:layout_width="Wrap_content"

android:layout_height="Wrap_content"

android:layout_alignparentleft="true"

android:layout_alignparenttop="true"

Android:text="Change screen orientation"/>

</ Relativelayout>

Page Java files:

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 ()

{

Public void OnClick (View source) {

TODO auto-generated Method stub

Configuration config = getresources (). GetConfiguration ();

if (config. Orientation = = Configuration. Orientation_landscape)

{

Set as vertical screen

Mainactivity. this. Setrequestedorientation (activityinfo. Screen_orientation_portrait);

}

Assuming the current is a vertical 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 ? "Landscape Screen" : "Portrait Screen";

Toast.maketext (This,"the system screen orientation has changed \ nthe direction is:" + screens , Toast. ) Length_long). Show ();

}

}

Mainfest XML file:

<? XML Version="1.0"encoding="utf-8"?

>

< Manifest xmlns:android="Http://schemas.android.com/apk/res/android"

Package="Com.example.chcfg"

Android:versioncode="1"

android:versionname="1.0">

<USES-SDK

android:minsdkversion="8"

android:targetsdkversion="/> "

<uses-permissionandroid:name=" Android.permission.CHANGE_CONFIGURATION "/>

<application

android:allowbackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/apptheme">

< Activity

android:name="Com.example.chcfg.MainActivity"

android:label="@string/app_name"

android:configchanges="orientation">

<intent-filter>

<actionandroid:name="Android.intent.action.MAIN" c9>/>

<categoryandroid:name="android.intent . category. LAUNCHER "/>

</intent-filter>

</ Activity >

</application>

</manifest>

Personal hard work results, if reproduced. Please indicate the source. Thank you.

Android Development Change screen orientation