| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.android.apis.preference; |
| |
| import com.example.android.apis.R; |
| |
| import android.content.SharedPreferences; |
| import android.content.SharedPreferences.OnSharedPreferenceChangeListener; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.preference.PreferenceActivity; |
| import android.preference.CheckBoxPreference; |
| import android.widget.Toast; |
| |
| /** |
| * Example that shows finding a preference from the hierarchy and a custom preference type. |
| */ |
| public class AdvancedPreferences extends PreferenceActivity implements OnSharedPreferenceChangeListener { |
| public static final String KEY_MY_PREFERENCE = "my_preference"; |
| public static final String KEY_ADVANCED_CHECKBOX_PREFERENCE = "advanced_checkbox_preference"; |
| |
| private CheckBoxPreference mCheckBoxPreference; |
| private Handler mHandler = new Handler(); |
| |
| /** |
| * This is a simple example of controlling a preference from code. |
| */ |
| private Runnable mForceCheckBoxRunnable = new Runnable() { |
| public void run() { |
| if (mCheckBoxPreference != null) { |
| mCheckBoxPreference.setChecked(!mCheckBoxPreference.isChecked()); |
| } |
| |
| // Force toggle again in a second |
| mHandler.postDelayed(this, 1000); |
| } |
| }; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| // Load the XML preferences file |
| addPreferencesFromResource(R.xml.advanced_preferences); |
| |
| // Get a reference to the checkbox preference |
| mCheckBoxPreference = (CheckBoxPreference)getPreferenceScreen().findPreference( |
| KEY_ADVANCED_CHECKBOX_PREFERENCE); |
| } |
| |
| @Override |
| protected void onResume() { |
| super.onResume(); |
| |
| // Start the force toggle |
| mForceCheckBoxRunnable.run(); |
| |
| // Set up a listener whenever a key changes |
| getPreferenceScreen().getSharedPreferences().registerOnSharedPreferenceChangeListener(this); |
| } |
| |
| @Override |
| protected void onPause() { |
| super.onPause(); |
| |
| // Unregister the listener whenever a key changes |
| getPreferenceScreen().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this); |
| |
| mHandler.removeCallbacks(mForceCheckBoxRunnable); |
| } |
| |
| public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) { |
| // Let's do something when my counter preference value changes |
| if (key.equals(KEY_MY_PREFERENCE)) { |
| Toast.makeText(this, "Thanks! You increased my count to " |
| + sharedPreferences.getInt(key, 0), Toast.LENGTH_SHORT).show(); |
| } |
| } |
| |
| } |