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.annotation.DrawableRes;
20 import android.annotation.NonNull;
21 import android.annotation.Nullable;
22 import android.app.Activity;
23 import android.app.admin.DevicePolicyManager;
24 import android.content.Context;
25 import android.content.pm.ApplicationInfo;
26 import android.content.pm.PackageManager;
27 import android.content.pm.ServiceInfo;
28 import android.content.res.Configuration;
29 import android.graphics.Color;
30 import android.graphics.drawable.ColorDrawable;
31 import android.graphics.drawable.Drawable;
32 import android.os.Bundle;
33 import android.support.v7.preference.PreferenceScreen;
34 import android.view.inputmethod.InputMethodInfo;
35 import android.view.inputmethod.InputMethodManager;
36 import com.android.internal.logging.MetricsProto.MetricsEvent;
37 import com.android.settings.R;
38 import com.android.settings.SettingsPreferenceFragment;
39 
40 import java.text.Collator;
41 import java.util.ArrayList;
42 import java.util.Collections;
43 import java.util.Comparator;
44 import java.util.List;
45 
46 public final class AvailableVirtualKeyboardFragment extends SettingsPreferenceFragment
47         implements InputMethodPreference.OnSavePreferenceListener {
48 
49     private final ArrayList<InputMethodPreference> mInputMethodPreferenceList = new ArrayList<>();
50     private InputMethodSettingValuesWrapper mInputMethodSettingValues;
51     private InputMethodManager mImm;
52     private DevicePolicyManager mDpm;
53 
54     @Override
onCreatePreferences(Bundle bundle, String s)55     public void onCreatePreferences(Bundle bundle, String s) {
56         Activity activity = getActivity();
57         PreferenceScreen screen = getPreferenceManager().createPreferenceScreen(activity);
58         screen.setTitle(activity.getString(R.string.available_virtual_keyboard_category));
59         setPreferenceScreen(screen);
60         mInputMethodSettingValues = InputMethodSettingValuesWrapper.getInstance(activity);
61         mImm = activity.getSystemService(InputMethodManager.class);
62         mDpm = activity.getSystemService(DevicePolicyManager.class);
63     }
64 
65     @Override
onResume()66     public void onResume() {
67         super.onResume();
68         // Refresh internal states in mInputMethodSettingValues to keep the latest
69         // "InputMethodInfo"s and "InputMethodSubtype"s
70         mInputMethodSettingValues.refreshAllInputMethodAndSubtypes();
71         updateInputMethodPreferenceViews();
72     }
73 
74     @Override
onSaveInputMethodPreference(final InputMethodPreference pref)75     public void onSaveInputMethodPreference(final InputMethodPreference pref) {
76         final boolean hasHardwareKeyboard = getResources().getConfiguration().keyboard
77                 == Configuration.KEYBOARD_QWERTY;
78         InputMethodAndSubtypeUtil.saveInputMethodSubtypeList(this, getContentResolver(),
79                 mImm.getInputMethodList(), hasHardwareKeyboard);
80         // Update input method settings and preference list.
81         mInputMethodSettingValues.refreshAllInputMethodAndSubtypes();
82         for (final InputMethodPreference p : mInputMethodPreferenceList) {
83             p.updatePreferenceViews();
84         }
85     }
86 
87     @Override
getMetricsCategory()88     protected int getMetricsCategory() {
89         return MetricsEvent.ENABLE_VIRTUAL_KEYBOARDS;
90     }
91 
92     @Nullable
loadDrawable(@onNull final PackageManager packageManager, @NonNull final String packageName, @DrawableRes final int resId, @NonNull final ApplicationInfo applicationInfo)93     private static Drawable loadDrawable(@NonNull final PackageManager packageManager,
94             @NonNull final String packageName, @DrawableRes final int resId,
95             @NonNull final ApplicationInfo applicationInfo) {
96         if (resId == 0) {
97             return null;
98         }
99         try {
100             return packageManager.getDrawable(packageName, resId, applicationInfo);
101         } catch (Exception e){
102             return null;
103         }
104     }
105 
106     @NonNull
getInputMethodIcon(@onNull final PackageManager packageManager, @NonNull final InputMethodInfo imi)107     private static Drawable getInputMethodIcon(@NonNull final PackageManager packageManager,
108             @NonNull final InputMethodInfo imi) {
109         final ServiceInfo si = imi.getServiceInfo();
110         final ApplicationInfo ai = si.applicationInfo;
111         final String packageName = imi.getPackageName();
112         if (si == null || ai == null || packageName == null) {
113             return new ColorDrawable(Color.TRANSPARENT);
114         }
115         // We do not use ServiceInfo#loadLogo() and ServiceInfo#loadIcon here since those methods
116         // internally have some fallback rules, which we want to do manually.
117         Drawable drawable = loadDrawable(packageManager, packageName, si.logo, ai);
118         if (drawable != null) {
119             return drawable;
120         }
121         drawable = loadDrawable(packageManager, packageName, si.icon, ai);
122         if (drawable != null) {
123             return drawable;
124         }
125         // We do not use ApplicationInfo#loadLogo() and ApplicationInfo#loadIcon here since those
126         // methods internally have some fallback rules, which we want to do manually.
127         drawable = loadDrawable(packageManager, packageName, ai.logo, ai);
128         if (drawable != null) {
129             return drawable;
130         }
131         drawable = loadDrawable(packageManager, packageName, ai.icon, ai);
132         if (drawable != null) {
133             return drawable;
134         }
135         return new ColorDrawable(Color.TRANSPARENT);
136     }
137 
updateInputMethodPreferenceViews()138     private void updateInputMethodPreferenceViews() {
139         mInputMethodSettingValues.refreshAllInputMethodAndSubtypes();
140         // Clear existing "InputMethodPreference"s
141         mInputMethodPreferenceList.clear();
142         List<String> permittedList = mDpm.getPermittedInputMethodsForCurrentUser();
143         final Context context = getPrefContext();
144         final PackageManager packageManager = getActivity().getPackageManager();
145         final List<InputMethodInfo> imis = mInputMethodSettingValues.getInputMethodList();
146         final int N = (imis == null ? 0 : imis.size());
147         for (int i = 0; i < N; ++i) {
148             final InputMethodInfo imi = imis.get(i);
149             final boolean isAllowedByOrganization = permittedList == null
150                     || permittedList.contains(imi.getPackageName());
151             final InputMethodPreference pref = new InputMethodPreference(
152                     context, imi, true, isAllowedByOrganization, this);
153             pref.setIcon(getInputMethodIcon(packageManager, imi));
154             mInputMethodPreferenceList.add(pref);
155         }
156         final Collator collator = Collator.getInstance();
157         Collections.sort(mInputMethodPreferenceList, new Comparator<InputMethodPreference>() {
158             @Override
159             public int compare(InputMethodPreference lhs, InputMethodPreference rhs) {
160                 return lhs.compareTo(rhs, collator);
161             }
162         });
163         getPreferenceScreen().removeAll();
164         for (int i = 0; i < N; ++i) {
165             final InputMethodPreference pref = mInputMethodPreferenceList.get(i);
166             pref.setOrder(i);
167             getPreferenceScreen().addPreference(pref);
168             InputMethodAndSubtypeUtil.removeUnnecessaryNonPersistentPreference(pref);
169             pref.updatePreferenceViews();
170         }
171     }
172 }
173