Android changes the way the phone is facing the screen _android

The example in this article describes how Android changes the screen orientation of your phone. Share to everyone for your reference. Specifically as follows:

Simulate when the button is clicked, the phone is facing a change.

Main.xml Layout file:

<?xml version= "1.0" encoding= "Utf-8"?> <linearlayout xmlns:android=
"http://schemas.android.com/apk/" Res/android "
  android:orientation=" vertical "android:layout_width=" fill_parent "
  android:layout_height=" Fill_parent ">
  <button android:id=" @+id/btn "android:layout_width=" fill_parent "Android:layout"
    _height= "Wrap_content" 
    android:text= "click Change screen toward"/>
  <!--android:hint: Displays the text when the text is empty-->
  < EditText android:id= "@+id/edittext" android:layout_width= fill_parent "android:layout_height=" Wrap_
    Content " 
    android:cursorvisible=" false "
    android:hint=" displays current screen orientation/>
</LinearLayout>

Manifest file:

<?xml version= "1.0" encoding= "Utf-8"?> <manifest xmlns:android= "http://schemas.android.com/apk/res/" Android "package=" Com.ljq.activity "android:versioncode=" 1 "android:versionname=" 1.0 "> <!--set the direction of the mobile phone, otherwise it will not be Take the phone's direction android:screenorientation= "Portrait" android:configchanges= "Orientation"--> <application Android : icon= "@drawable/icon" android:label= "@string/app_name" > <activity android:name= ". Orientationactivity "android:label=" @string/app_name "android:screenorientation=" Portrait "Andr" oid:configchanges= "Orientation" > <intent-filter> <action android:name= "Android.intent.action.MAI N "/> <category android:name=" Android.intent.category.LAUNCHER "/> </intent-filter> </ activity> </application> <uses-sdk android:minsdkversion= "7"/> <!--change the phone configuration permissions--> <uses-pe Rmission android:name= "Android.permission.CHANGE_CONFIGURATION"/&GT

 </manifest>

Orientationactivity class:

Package com.ljq.activity;
Import android.app.Activity;
Import Android.content.pm.ActivityInfo;
Import android.content.res.Configuration;
Import Android.os.Bundle;
Import Android.view.View;
Import Android.widget.Button;
Import Android.widget.EditText;
Import Android.widget.Toast;
  public class Orientationactivity extends activity {private EditText edittext=null;
    @Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
    Setcontentview (R.layout.main);
    edittext= (EditText) Findviewbyid (R.id.edittext);
    Button btn= (button) Findviewbyid (R.ID.BTN); Btn.setonclicklistener (New View.onclicklistener () {public void OnClick (View v) {//Determine if the Requestedorientat can be obtained Ion Property if (OrientationActivity.this.getRequestedOrientation () ==-1) {Toast.maketext (Orientationactivity.thi
        S, "system orientation not available", Toast.length_long. Show (); }else{//Mobile screen orientation has 7 optional values, respectively, as follows//screen_orientation_behind: The current acti in the inheritance activity stackThe direction of the activity below the vity//screen_orientation_landscape: Horizontal screen (Landscape), display width greater than height//screen_orientation_portrait : Vertical screen (portrait photo), display height greater than width//screen_orientation_nosensor: ignoring physical sensors-that is, the display direction is independent of the physical sensor,///No matter how the user rotates the device display direction will not change with 
          (Except for the "unspecified" setting)//screen_orientation_sensor: The physical sensor determines the display direction, depending on how the user holds the device,//the direction changes when the device is rotated-between the horizontal screen and the vertical screen
          Screen_orientation_unspecified: Unspecified, this is the default value, the Android system chooses the appropriate direction,//selection policy depending on the configuration of the specific equipment, so different devices will have different direction to choose Screen_orientation_user: User's current preferred direction if (OrientationActivity.this.getRequestedOrientation () ==activityin Fo. Screen_orientation_landscape) {OrientationActivity.this.setRequestedOrientation (activityinfo.screen_orientatio
          n_portrait); }else if (OrientationActivity.this.getRequestedOrientation () ==activityinfo.screen_orientation_portrait) {Orient
          AtionActivity.this.setRequestedOrientation (Activityinfo.screen_orientation_landscape);
   }
        }
      } }); /** * When configuration information changes trigger/@Override public void onconfigurationchanged (Configuration newconfig) {Toast.maket
    Ext (This, "the system's screen orientation has changed", Toast.length_long). Show (); int o=getrequestedorientation ()//Get the phone's facing switch (o) {case ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE:editT
      Ext.settext ("Current screen orientation: horizontal screen");
    Break
      Case ActivityInfo.SCREEN_ORIENTATION_PORTRAIT:editText.setText ("Current screen orientation: vertical screen");
    Break //Can not omit, otherwise will report android.app.SuperNotCalledException:Activity Orientationactivity did not//call through to Super.onc
  Onfigurationchanged () Abnormal super.onconfigurationchanged (newconfig);

 }
}

Run Result:

I hope this article will help you with your Android program.