| Value | Description |
| “mcc“ | The IMSI mobile country code (MCC) has changed — that is, a SIM hasbeen detected and updated the MCC.移动国家号码，由三位数字组成，每个国家都有自己独立的MCC，可以识别手机用户所属国家。 |
| “mnc“ | The IMSI mobile network code (MNC) has changed — that is, a SIM hasbeen detected and updated the MNC.移动网号，在一个国家或者地区中，用于区分手机用户的服务商。 |
| “locale“ | The locale has changed — for example, the user has selected a new language that text should be displayed in.用户所在地区发生变化。 |
| “touchscreen“ | The touchscreen has changed. (This should never normally happen.) |
| “keyboard“ | The keyboard type has changed — for example, the user has plugged in an external keyboard.键盘模式发生变化，例如：用户接入外部键盘输入。 |
| “keyboardHidden“ | The keyboard accessibility has changed — for example, the user has slid the keyboard out to expose it.用户打开手机硬件键盘 |
| “navigation“ | The navigation type has changed. (This should never normally happen.) |
| “orientation“ | The screen orientation has changed — that is, the user has rotated the device.设备旋转，横向显示和竖向显示模式切换。 |
| “fontScale“ | The font scaling factor has changed — that is, the user has selected a new global font size.全局字体大小缩放发生改变 |
通过一个例子介绍这个属性的用法： 首先需要修改项目的manifest:
View Code XML
在Activity中添加了 android:configChanges属性，目的是当所指定属性(Configuration Changes)发生改变时，通知 程序调用 onConfigurationChanged()函数。 创建一个Layout UI: View Code XML
这个简单的UI包含两个按钮，其中一个是通过Contact列表选择一个 联系人，另外一个是查看当前选择联系人的详细内容。
01.import android.app.Activity;02.import android.content.Intent;03.import android.content.res.Configuration;04.import android.net.Uri;05.import android.os.Bundle;06.import android.provider.Contacts.People;07.import android.view.View;08.import android.widget.Button;09.10.public class ConfigChangedTesting extends Activity {11. /** Called when the activity is first created. */12. static final int PICK_REQUEST = 1337;13. Button viewButton=null;14. Uri contact = null;15. @Override16. public void onCreate(Bundle savedInstanceState) {17. super.onCreate(savedInstanceState);18. //setContentView(R.layout.main);19.20. setupViews();21. }22.23. public void onConfigurationChanged(Configuration newConfig) {24. super.onConfigurationChanged(newConfig); 25.26. setupViews();27. } 28.29. /* (non-Javadoc)30. * @see android.app.Activity#onActivityResult(int, int, android.content.Intent)31. */32. @Override33. protected void onActivityResult(int requestCode, int resultCode, Intent data) {34. // TODO Auto-generated method stub35. //super.onActivityResult(requestCode, resultCode, data);36.37. if(requestCode == PICK_REQUEST){38.39. if(resultCode==RESULT_OK){40.41. contact = data.getData();42. viewButton.setEnabled(true);43. }44.45. }46.47. }48.49. private void setupViews(){50.51. setContentView(R.layout.main);52.53. Button pickBtn = (Button)findViewById(R.id.pick);54.55. pickBtn.setOnClickListener(new View.OnClickListener(){56.57. public void onClick(View v) {58. // TODO Auto-generated method stub59.60. Intent i=new Intent(Intent.ACTION_PICK,People.CONTENT_URI);61. startActivityForResult(i,PICK_REQUEST);62. }63. });64.65. viewButton =(Button)findViewById(R.id.view); 66.67. viewButton.setOnClickListener(new View.OnClickListener() {68. public void onClick(View view) {69. startActivity(new Intent(Intent.ACTION_VIEW, contact));70. }71. }); 72.73. viewButton.setEnabled(contact!=null);74. }75.}