Android之數據存儲共享參數實現系統設置操作功能（二）

新建工程Android_data_settings選中API11:Android3.0(HoneyComb)

在res新建文件夾xml中創建mysetting.xml文件:New Android XML File->Resource Type 中選中Preference，File命名爲mysettings.xml點擊next->finsh

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
    
      <!-- 設置的類別 -->
    <PreferenceCategory
        android:key="mylocation"
        android:summary="我的位置"
        android:title="我的位置源" >
        <CheckBoxPreference
            android:key="wireless_network"
            android:summary="使用無線網絡查看應用程序（例如Google地圖）中的位置"
            android:title="使用無線網絡" />
        <CheckBoxPreference
            android:key="gps_satellite_setting"
            android:summary="定位時，精確到街道級別（取消選擇可節約電量）"
            android:title="啓用GPS衛星設置" />
    </PreferenceCategory>
    <PreferenceCategory
        android:key="mymessage"
        android:summary="個人信息設置"
        android:title="個人信息設置" >
        <CheckBoxPreference
            android:key="yesno_save_individual_info"
            android:title="是否保存個人信息" />

        <EditTextPreference
            android:key="individual_name"
            android:summary="請輸入真實姓名"
            android:title="姓名 " />

        <ListPreference
            android:entries="@array/citys"
            android:entryValues="@array/citys"
            android:key="mycity"
            android:summary="所屬城市"
            android:title="所屬城市" />
    </PreferenceCategory>

</PreferenceScreen>

strings.xml代碼

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">Android_data_settings</string>
    <string name="hello_world">Hello world!</string>
    <string name="action_settings">Settings</string>

    <string-array name="citys">
        <item>北京</item>
        <item>上海</item>
        <item>廣州</item>
    </string-array>
    
    
</resources>

MainActivity.java代碼

package com.example.android_data_settings;

import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.EditTextPreference;
import android.preference.Preference;
import android.preference.PreferenceScreen;
import android.preference.Preference.OnPreferenceChangeListener;
import android.preference.PreferenceActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class MainActivity extends PreferenceActivity implements OnPreferenceChangeListener {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		getPreferenceManager().setSharedPreferencesName("mysettings");
		addPreferencesFromResource(R.xml.mysettings);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}

	@Override
	public boolean onPreferenceChange(Preference arg0, Object arg1) {
		// TODO Auto-generated method stub
		return false;
	}
	
	@Override
	public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen,
			Preference preference) {
		// TODO Auto-generated method stub
		if ("yesno_save_individual_info".equals(preference.getKey())) {
			Toast.makeText(MainActivity.this, "hello", 1).show();
			CheckBoxPreference checkBoxPreference = (CheckBoxPreference) findPreference("yesno_save_individual_info");
			EditTextPreference editTextPreference = (EditTextPreference) findPreference("individual_name");
			editTextPreference.setEnabled(checkBoxPreference.isChecked());
		}
		return super.onPreferenceTreeClick(preferenceScreen, preference);
	}
}

運行效果圖

當勾選了是否保存個人信息，下面的姓名一欄就可以輸入。