20.11.2016 Views

Android App Development ฉบับสมบูรณ์

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7. เมื่อรันแอพพลิเคชันจะได้ผลลัพธ์ดังนี้<br />

8. แก้ไขโค้ด Java ในไฟล์ MyPreferencesScreenActivity.java เพื่อนำค่าจาก Preference มาใช้งาน<br />

และเพิ่มเหตุการณ์เมื่อคลิกปุ่ม Custom Preference ดังนี้<br />

package com.viewgroup.mypref;<br />

import android.app.Activity;<br />

import android.content.SharedPreferences;<br />

import android.os.Bundle;<br />

import android.preference.Preference;<br />

import android.preference.Preference.OnPreferenceClickListener;<br />

import android.preference.PreferenceActivity;<br />

import android.preference.PreferenceManager;<br />

import android.widget.Toast;<br />

public class MyPreferencesScreenActivity extends PreferenceActivity {<br />

boolean CheckboxPreference;<br />

String ListPreference;<br />

String editTextPreference;<br />

String ringtonePreference;<br />

String customPref;<br />

/** Called when the activity is first created. */<br />

@Override<br />

public void onCreate(Bundle savedInstanceState) {<br />

super.onCreate(savedInstanceState);<br />

addPreferencesFromResource(R.xml.mypref);<br />

Preference customPref = (Preference) findPreference("customPref");<br />

customPref<br />

.setOnPreferenceClickListener(new OnPreferenceClickListener() {<br />

public boolean onPreferenceClick(Preference preference) {<br />

getPrefValue();<br />

Toast.makeText(<br />

148<br />

<strong>Android</strong> <strong>App</strong> <strong>Development</strong> <strong>ฉบับสมบูรณ์</strong>

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