[转载][开发教程] Activity中ConfigChanges属性的用法

官方
解释： 通过设置
这个属性可以使Activity捕捉设备状态变化，
以下是可以被识别的内容：

CONFIG_FONT_SCALE

CONFIG_MCC

CONFIG_MNC

CONFIG_LOCALE

CONFIG_TOUCHSCREEN

CONFIG_KEYBOARD

CONFIG_NAVIGATION

CONFIG_ORIENTATION

设置方法：将下列字段用“|”符号分隔开，例如：“locale|navigation|orientation

”

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 displ ayed 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

<manifest xmlns:android ="http://schemas.android.com/apk /res/android" package ="com.androidres.ConfigChangedTesting" android:versionCode ="1" android:versionName ="1.0.0" > <application android:icon ="@drawable/icon" android:label ="@string/app_name" > <activity android:name =".ConfigChangedTesting" android:label ="@string/app_name" android:configChanges ="keyboardHidden|orientation" > <intent-filter[b]> [/b] <action android:name ="android.intent.action.MAIN" /> <category android:name ="android.intent.category.LAUNCHER" /> </intent-filter[b]> [/b] </activity[b]> [/b] </application[b]> [/b] </manifest[b]> [/b]

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

<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/pick" android:layout_width ="fill_parent" android:layout_height ="wrap_content" android:text ="Pick" /> <Button android:id ="@+id/view" android:layout_width ="fill_parent" android:layout_height ="wrap_content" android:text ="View" /> </LinearLayout[b]> [/b]

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。



项目的Java源代码：

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. @Override

16. 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. @Override

33. protected void onActivityResult(int requestCode, int resultCode,
Intent data) {

34. // TODO Auto-generated method stub

35. //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 stub

59.

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.}

from：http://www.hiapk.com/bbs/thread-6199-1-1.html