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:
- <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>
- <action android:name="android.intent.action.MAIN" />
- <category android:name="android.intent.category.LAUNCHER" />
- </intent-filter>
- </activity>
- </application>
- </manifest>
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- <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>
- <action android:name="android.intent.action.MAIN" />
- <category android:name="android.intent.category.LAUNCHER" />
- </intent-filter>
- </activity>
- </application>
- </manifest>
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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:
- <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>
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- <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>
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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。
<ignore_js_op>
项目的Java源代码:
- import android.app.Activity;
- import android.content.Intent;
- import android.content.res.Configuration;
- import android.net.Uri;
- import android.os.Bundle;
- import android.provider.Contacts.People;
- import android.view.View;
- import android.widget.Button;
- public class ConfigChangedTesting extends Activity {
- /** Called when the activity is first created. */
- static final int PICK_REQUEST = 1337;
- Button viewButton=null;
- Uri contact = null;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- //setContentView(R.layout.main);
- setupViews();
- }
- public void onConfigurationChanged(Configuration newConfig) {
- super.onConfigurationChanged(newConfig);
- setupViews();
- }
- /* (non-Javadoc)
- * @see android.app.Activity#onActivityResult(int, int, android.content.Intent)
- */
- @Override
- protected void onActivityResult(int requestCode, int resultCode, Intent data) {
- // TODO Auto-generated method stub
- //super.onActivityResult(requestCode, resultCode, data);
- if(requestCode == PICK_REQUEST){
- if(resultCode==RESULT_OK){
- contact = data.getData();
- viewButton.setEnabled(true);
- }
- }
- }
- private void setupViews(){
- setContentView(R.layout.main);
- Button pickBtn = (Button)findViewById(R.id.pick);
- pickBtn.setOnClickListener(new View.OnClickListener(){
- public void onClick(View v) {
- // TODO Auto-generated method stub
- Intent i=new Intent(Intent.ACTION_PICK,People.CONTENT_URI);
- startActivityForResult(i,PICK_REQUEST);
- }
- });
- viewButton =(Button)findViewById(R.id.view);
- viewButton.setOnClickListener(new View.OnClickListener() {
- public void onClick(View view) {
- startActivity(new Intent(Intent.ACTION_VIEW, contact));
- }
- });
- viewButton.setEnabled(contact!=null);
- }
- }
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