?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 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
xmlns:android="apk/res/android"
? ?? ?package="com.androidres.ConfigChangedTesting"
? ?? ?android:versionCode="1"
? ?? ?android:versionName="1.0.0">
? ? android:icon="@drawable/icon" android:label="@string/app_name">
? ?? ??? android:name=".ConfigChangedTesting"
? ?? ?? ?? ?? ?? ?android:label="@string/app_name"
? ?? ?? ?? ?? ?? ?android:configChanges="keyboardHidden|orientation">
? ?? ?? ?? ?>
? ?? ?? ?? ?? ? android:name="android.intent.action.MAIN" />
? ?? ?? ?? ?? ? android:name="android.intent.category.LAUNCHER" />
? ?? ?? ?? ?>
? ?? ???>
? ? >
>
|
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
xmlns:android="apk/res/android"
? ? android:orientation="vertical"
? ? android:layout_width="fill_parent"
? ? android:layout_height="fill_parent"
? ? >
? ? ? ? android:id="@+id/pick"
? ? android:layout_width="fill_parent"
? ? android:layout_height="wrap_content"
? ? android:text="Pick"
? ? />
? ? ? ? android:id="@+id/view"
? ? android:layout_width="fill_parent"
? ? android:layout_height="wrap_content"
? ? android:text="View"
? ? />
>
|
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.}
