1 /* 2 * Copyright (C) 2016 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 android.app.Activity; 20 import android.app.admin.DevicePolicyManager; 21 import android.content.Context; 22 import android.graphics.Color; 23 import android.graphics.drawable.ColorDrawable; 24 import android.graphics.drawable.Drawable; 25 import android.os.Bundle; 26 import android.support.v7.preference.Preference; 27 import android.view.inputmethod.InputMethodInfo; 28 import android.view.inputmethod.InputMethodManager; 29 import com.android.internal.logging.MetricsProto.MetricsEvent; 30 import com.android.internal.util.Preconditions; 31 import com.android.settings.R; 32 import com.android.settings.SettingsPreferenceFragment; 33 34 import java.text.Collator; 35 import java.util.ArrayList; 36 import java.util.Collections; 37 import java.util.Comparator; 38 import java.util.List; 39 40 public final class VirtualKeyboardFragment extends SettingsPreferenceFragment { 41 42 private static final String ADD_VIRTUAL_KEYBOARD_SCREEN = "add_virtual_keyboard_screen"; 43 private static final Drawable NO_ICON = new ColorDrawable(Color.TRANSPARENT); 44 45 private final ArrayList<InputMethodPreference> mInputMethodPreferenceList = new ArrayList<>(); 46 private InputMethodManager mImm; 47 private DevicePolicyManager mDpm; 48 private Preference mAddVirtualKeyboardScreen; 49 50 @Override onCreatePreferences(Bundle bundle, String s)51 public void onCreatePreferences(Bundle bundle, String s) { 52 Activity activity = Preconditions.checkNotNull(getActivity()); 53 addPreferencesFromResource(R.xml.virtual_keyboard_settings); 54 mImm = Preconditions.checkNotNull(activity.getSystemService(InputMethodManager.class)); 55 mDpm = Preconditions.checkNotNull(activity.getSystemService(DevicePolicyManager.class)); 56 mAddVirtualKeyboardScreen = Preconditions.checkNotNull( 57 findPreference(ADD_VIRTUAL_KEYBOARD_SCREEN)); 58 } 59 60 @Override onResume()61 public void onResume() { 62 super.onResume(); 63 // Refresh internal states in mInputMethodSettingValues to keep the latest 64 // "InputMethodInfo"s and "InputMethodSubtype"s 65 updateInputMethodPreferenceViews(); 66 } 67 68 @Override getMetricsCategory()69 protected int getMetricsCategory() { 70 return MetricsEvent.VIRTUAL_KEYBOARDS; 71 } 72 updateInputMethodPreferenceViews()73 private void updateInputMethodPreferenceViews() { 74 // Clear existing "InputMethodPreference"s 75 mInputMethodPreferenceList.clear(); 76 List<String> permittedList = mDpm.getPermittedInputMethodsForCurrentUser(); 77 final Context context = getPrefContext(); 78 final List<InputMethodInfo> imis = mImm.getEnabledInputMethodList(); 79 final int N = (imis == null ? 0 : imis.size()); 80 for (int i = 0; i < N; ++i) { 81 final InputMethodInfo imi = imis.get(i); 82 final boolean isAllowedByOrganization = permittedList == null 83 || permittedList.contains(imi.getPackageName()); 84 Drawable icon; 85 try { 86 // TODO: Consider other ways to retrieve an icon to show here. 87 icon = getActivity().getPackageManager().getApplicationIcon(imi.getPackageName()); 88 } catch (Exception e) { 89 // TODO: Consider handling the error differently perhaps by showing default icons. 90 icon = NO_ICON; 91 } 92 final InputMethodPreference pref = new InputMethodPreference( 93 context, 94 imi, 95 false, /* isImeEnabler */ 96 isAllowedByOrganization, 97 null /* this can be null since isImeEnabler is false */); 98 pref.setIcon(icon); 99 mInputMethodPreferenceList.add(pref); 100 } 101 final Collator collator = Collator.getInstance(); 102 Collections.sort(mInputMethodPreferenceList, new Comparator<InputMethodPreference>() { 103 @Override 104 public int compare(InputMethodPreference lhs, InputMethodPreference rhs) { 105 return lhs.compareTo(rhs, collator); 106 } 107 }); 108 getPreferenceScreen().removeAll(); 109 for (int i = 0; i < N; ++i) { 110 final InputMethodPreference pref = mInputMethodPreferenceList.get(i); 111 pref.setOrder(i); 112 getPreferenceScreen().addPreference(pref); 113 InputMethodAndSubtypeUtil.removeUnnecessaryNonPersistentPreference(pref); 114 pref.updatePreferenceViews(); 115 } 116 mAddVirtualKeyboardScreen.setIcon(R.drawable.ic_add_24dp); 117 mAddVirtualKeyboardScreen.setOrder(N); 118 getPreferenceScreen().addPreference(mAddVirtualKeyboardScreen); 119 } 120 } 121