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      1 /*
      2  * Copyright (C) 2009 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.inputmethod.pinyin;
     18 
     19 import java.util.List;
     20 
     21 import android.os.Bundle;
     22 import android.preference.CheckBoxPreference;
     23 import android.preference.Preference;
     24 import android.preference.PreferenceActivity;
     25 import android.preference.PreferenceGroup;
     26 import android.preference.PreferenceManager;
     27 import android.preference.PreferenceScreen;
     28 import com.android.inputmethod.pinyin.Settings;
     29 import android.content.Intent;
     30 import android.content.pm.PackageManager;
     31 import android.content.pm.ResolveInfo;
     32 
     33 /**
     34  * Setting activity of Pinyin IME.
     35  */
     36 public class SettingsActivity extends PreferenceActivity implements
     37         Preference.OnPreferenceChangeListener {
     38 
     39     private static String TAG = "SettingsActivity";
     40 
     41     private CheckBoxPreference mKeySoundPref;
     42     private CheckBoxPreference mVibratePref;
     43     private CheckBoxPreference mPredictionPref;
     44 
     45     @Override
     46     protected void onCreate(Bundle savedInstanceState) {
     47         super.onCreate(savedInstanceState);
     48         addPreferencesFromResource(R.xml.settings);
     49 
     50         PreferenceScreen prefSet = getPreferenceScreen();
     51 
     52         mKeySoundPref = (CheckBoxPreference) prefSet
     53                 .findPreference(getString(R.string.setting_sound_key));
     54         mVibratePref = (CheckBoxPreference) prefSet
     55                 .findPreference(getString(R.string.setting_vibrate_key));
     56         mPredictionPref = (CheckBoxPreference) prefSet
     57                 .findPreference(getString(R.string.setting_prediction_key));
     58 
     59         prefSet.setOnPreferenceChangeListener(this);
     60 
     61         Settings.getInstance(PreferenceManager
     62                 .getDefaultSharedPreferences(getApplicationContext()));
     63 
     64         updatePreference(prefSet, getString(R.string.setting_advanced_key));
     65 
     66         updateWidgets();
     67     }
     68 
     69     @Override
     70     protected void onResume() {
     71         super.onResume();
     72         updateWidgets();
     73     }
     74 
     75     @Override
     76     protected void onDestroy() {
     77         Settings.releaseInstance();
     78         super.onDestroy();
     79     }
     80 
     81     @Override
     82     protected void onPause() {
     83         super.onPause();
     84         Settings.setKeySound(mKeySoundPref.isChecked());
     85         Settings.setVibrate(mVibratePref.isChecked());
     86         Settings.setPrediction(mPredictionPref.isChecked());
     87 
     88         Settings.writeBack();
     89     }
     90 
     91     public boolean onPreferenceChange(Preference preference, Object newValue) {
     92         return true;
     93     }
     94 
     95     private void updateWidgets() {
     96         mKeySoundPref.setChecked(Settings.getKeySound());
     97         mVibratePref.setChecked(Settings.getVibrate());
     98         mPredictionPref.setChecked(Settings.getPrediction());
     99     }
    100 
    101     public void updatePreference(PreferenceGroup parentPref, String prefKey) {
    102         Preference preference = parentPref.findPreference(prefKey);
    103         if (preference == null) {
    104             return;
    105         }
    106         Intent intent = preference.getIntent();
    107         if (intent != null) {
    108             PackageManager pm = getPackageManager();
    109             List<ResolveInfo> list = pm.queryIntentActivities(intent, 0);
    110             int listSize = list.size();
    111             if (listSize == 0)
    112                 parentPref.removePreference(preference);
    113         }
    114     }
    115 }
    116