Settings 设置（2）

<?xml version="1.0" encoding="UTF-8"?>

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >

<PreferenceCategory android:title="第一组">
<ListPreference
android:icon="@drawable/zjl"
android:dialogTitle="list dialog Title"
android:entries="@array/citys"
android:entryValues="@array/citys_code"
android:key="list_key"
android:summary="list 的内容"
android:title="选择  title"
/>
</PreferenceCategory>

<PreferenceCategory android:title="第二组">
<EditTextPreference
android:icon="@drawable/ic_launcher"
android:defaultValue="缺省值1"
android:key="edit_text_key_1"
android:summary="edit summary"
android:title="写什么  text 1"
/>
<CheckBoxPreference
android:icon="@drawable/ic_launcher"
android:defaultValue="true"
android:key="checkbox_key"
android:summary="checkbox summary"
android:title="勾选  title"
/>
</PreferenceCategory>

<!-- 点击将浏览和打开网页 -->
<Preference
android:icon="@drawable/csdn"
android:summary="http://blog.csdn.net/Rokends"
android:title="网页浏览">
<intent
android:action="android.intent.action.VIEW"
android:data="http://blog.csdn.net/Rokends"
/>

</Preference>

<SwitchPreference
android:icon="@drawable/wifi"
android:key="open_key"
android:summary="Chaniese_520"
android:title="WiFi" />

<!-- 此处将跳转到下一屏设置 -->
<PreferenceScreen
android:icon="@drawable/ic_launcher"
android:key="preference_screen_key_2"
android:persistent="false"
android:title="跳转到下页 "
>
<EditTextPreference
android:icon="@drawable/ic_launcher"
android:defaultValue="缺省值2"
android:key="edit_text_key_2"
android:summary="edit summary"
android:title="写什么  text 2"
/>

</PreferenceScreen>

</PreferenceScreen>

<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="citys">
<item>成都</item>
<item>北京</item>
<item>上海</item>
</string-array>

<string-array name="citys_code">
<item>028</item>
<item>010</item>
<item>021</item>
</string-array>
</resources>

package com.example.settings;

import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.Bundle;

import android.preference.EditTextPreference;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceManager;
import android.preference.PreferenceScreen;
import android.widget.Toast;

public class MainActivity extends PreferenceActivity {

private MyOnSharedPreferenceChangeListener mOnSharedPreferenceChangeListener = new MyOnSharedPreferenceChangeListener();

private EditTextPreference mEditTextPreference;
private final String A_KEY = "edit_text_key_1";

private ListPreference mListPreference;
private final String LIST_KEY = "list_key";

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.activity_main);

// 通用的读取设置某个值的方法
SharedPreferences sharedPreferences = PreferenceManager
.getDefaultSharedPreferences(this);
String s = sharedPreferences.getString(A_KEY, "暂时为空");

// 添加设置选项
addPreferencesFromResource(R.xml.preferences);

// 预读取。为PreferenceActivity中的某个设置选项初始化值
mEditTextPreference = (EditTextPreference) findPreference(A_KEY);
mEditTextPreference.setSummary(s);

// 注册添加设置的项数据发生变化时候的监听
sharedPreferences.registerOnSharedPreferenceChangeListener(mOnSharedPreferenceChangeListener);

mListPreference = (ListPreference) findPreference(LIST_KEY);
}

@Override
protected void onPause() {
super.onPause();
getPreferenceScreen().getSharedPreferences()
.unregisterOnSharedPreferenceChangeListener(
mOnSharedPreferenceChangeListener);
}

@Override
protected void onResume() {
super.onResume();
getPreferenceScreen().getSharedPreferences()
.registerOnSharedPreferenceChangeListener(
mOnSharedPreferenceChangeListener);

}

// 那一个设置选项栏被触发,回掉机制
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
Toast.makeText(getApplication(),preference.getTitle()+"->"+preference.getKey(), Toast.LENGTH_SHORT).show();

return false;
}

private class MyOnSharedPreferenceChangeListener implements
OnSharedPreferenceChangeListener {

@Override
public void onSharedPreferenceChanged(
SharedPreferences sharedPreferences, String key) {

if(key.equals(A_KEY)){
String s = sharedPreferences.getString(A_KEY, "NULL");
mEditTextPreference.setSummary(s);
}
if(key.equals(LIST_KEY)){
String e = mListPreference.getEntry()+"";
String v = mListPreference.getValue();
mListPreference.setSummary(e+":"+v);
}
Toast.makeText(getApplication(), key, Toast.LENGTH_SHORT).show();
}
}
}