1 /* 2 * Copyright (C) 2012 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.settings.inputmethod; 18 19 import com.android.settings.R; 20 import com.android.settings.SettingsPreferenceFragment; 21 22 import android.content.Context; 23 import android.hardware.input.InputDeviceIdentifier; 24 import android.hardware.input.InputManager; 25 import android.hardware.input.InputManager.InputDeviceListener; 26 import android.hardware.input.KeyboardLayout; 27 import android.os.Bundle; 28 import android.preference.CheckBoxPreference; 29 import android.preference.Preference; 30 import android.preference.PreferenceScreen; 31 import android.view.InputDevice; 32 33 import java.util.Arrays; 34 import java.util.HashMap; 35 import java.util.Map; 36 37 public class KeyboardLayoutPickerFragment extends SettingsPreferenceFragment 38 implements InputDeviceListener { 39 private InputDeviceIdentifier mInputDeviceIdentifier; 40 private int mInputDeviceId = -1; 41 private InputManager mIm; 42 private KeyboardLayout[] mKeyboardLayouts; 43 private HashMap<CheckBoxPreference, KeyboardLayout> mPreferenceMap = 44 new HashMap<CheckBoxPreference, KeyboardLayout>(); 45 46 /** 47 * Intent extra: The input device descriptor of the keyboard whose keyboard 48 * layout is to be changed. 49 */ 50 public static final String EXTRA_INPUT_DEVICE_IDENTIFIER = "input_device_identifier"; 51 52 @Override onCreate(Bundle icicle)53 public void onCreate(Bundle icicle) { 54 super.onCreate(icicle); 55 56 mInputDeviceIdentifier = getActivity().getIntent().getParcelableExtra( 57 EXTRA_INPUT_DEVICE_IDENTIFIER); 58 if (mInputDeviceIdentifier == null) { 59 getActivity().finish(); 60 } 61 62 mIm = (InputManager)getSystemService(Context.INPUT_SERVICE); 63 mKeyboardLayouts = mIm.getKeyboardLayouts(); 64 Arrays.sort(mKeyboardLayouts); 65 setPreferenceScreen(createPreferenceHierarchy()); 66 } 67 68 @Override onResume()69 public void onResume() { 70 super.onResume(); 71 72 mIm.registerInputDeviceListener(this, null); 73 74 InputDevice inputDevice = 75 mIm.getInputDeviceByDescriptor(mInputDeviceIdentifier.getDescriptor()); 76 if (inputDevice == null) { 77 getActivity().finish(); 78 return; 79 } 80 mInputDeviceId = inputDevice.getId(); 81 82 updateCheckedState(); 83 } 84 85 @Override onPause()86 public void onPause() { 87 mIm.unregisterInputDeviceListener(this); 88 mInputDeviceId = -1; 89 90 super.onPause(); 91 } 92 93 @Override onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference)94 public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, 95 Preference preference) { 96 if (preference instanceof CheckBoxPreference) { 97 CheckBoxPreference checkboxPref = (CheckBoxPreference)preference; 98 KeyboardLayout layout = mPreferenceMap.get(checkboxPref); 99 if (layout != null) { 100 boolean checked = checkboxPref.isChecked(); 101 if (checked) { 102 mIm.addKeyboardLayoutForInputDevice(mInputDeviceIdentifier, 103 layout.getDescriptor()); 104 } else { 105 mIm.removeKeyboardLayoutForInputDevice(mInputDeviceIdentifier, 106 layout.getDescriptor()); 107 } 108 return true; 109 } 110 } 111 return super.onPreferenceTreeClick(preferenceScreen, preference); 112 } 113 114 @Override onInputDeviceAdded(int deviceId)115 public void onInputDeviceAdded(int deviceId) { 116 } 117 118 @Override onInputDeviceChanged(int deviceId)119 public void onInputDeviceChanged(int deviceId) { 120 if (mInputDeviceId >= 0 && deviceId == mInputDeviceId) { 121 updateCheckedState(); 122 } 123 } 124 125 @Override onInputDeviceRemoved(int deviceId)126 public void onInputDeviceRemoved(int deviceId) { 127 if (mInputDeviceId >= 0 && deviceId == mInputDeviceId) { 128 getActivity().finish(); 129 } 130 } 131 createPreferenceHierarchy()132 private PreferenceScreen createPreferenceHierarchy() { 133 PreferenceScreen root = getPreferenceManager().createPreferenceScreen(getActivity()); 134 Context context = getActivity(); 135 136 for (KeyboardLayout layout : mKeyboardLayouts) { 137 CheckBoxPreference pref = new CheckBoxPreference(context); 138 pref.setTitle(layout.getLabel()); 139 pref.setSummary(layout.getCollection()); 140 root.addPreference(pref); 141 mPreferenceMap.put(pref, layout); 142 } 143 return root; 144 } 145 updateCheckedState()146 private void updateCheckedState() { 147 String[] enabledKeyboardLayouts = mIm.getKeyboardLayoutsForInputDevice( 148 mInputDeviceIdentifier); 149 Arrays.sort(enabledKeyboardLayouts); 150 151 for (Map.Entry<CheckBoxPreference, KeyboardLayout> entry : mPreferenceMap.entrySet()) { 152 entry.getKey().setChecked(Arrays.binarySearch(enabledKeyboardLayouts, 153 entry.getValue().getDescriptor()) >= 0); 154 } 155 } 156 } 157