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      1 /*
      2  * Copyright (C) 2017 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.tv.settings.accessibility;
     18 
     19 import android.accessibilityservice.AccessibilityServiceInfo;
     20 import android.app.Fragment;
     21 import android.content.ComponentName;
     22 import android.content.Context;
     23 import android.content.pm.PackageManager;
     24 import android.os.Bundle;
     25 import android.provider.Settings;
     26 import android.support.annotation.Keep;
     27 import android.support.v17.preference.LeanbackPreferenceFragment;
     28 import android.support.v17.preference.LeanbackSettingsFragment;
     29 import android.support.v7.preference.Preference;
     30 import android.support.v7.preference.PreferenceScreen;
     31 import android.text.TextUtils;
     32 import android.view.accessibility.AccessibilityManager;
     33 
     34 import com.android.tv.settings.R;
     35 import com.android.tv.settings.RadioPreference;
     36 
     37 import java.util.List;
     38 
     39 /**
     40  * Fragment imitating a single-selection list for picking the accessibility shortcut service
     41  */
     42 @Keep
     43 public class AccessibilityShortcutServiceFragment extends LeanbackPreferenceFragment implements
     44         AccessibilityServiceConfirmationFragment.OnAccessibilityServiceConfirmedListener {
     45     private static final String SERVICE_RADIO_GROUP = "service_group";
     46 
     47     private final Preference.OnPreferenceChangeListener mPreferenceChangeListener =
     48             (preference, newValue) -> {
     49                 final String newCompString = preference.getKey();
     50                 final String currentService =
     51                         AccessibilityShortcutFragment.getCurrentService(getContext());
     52                 if ((Boolean) newValue && !TextUtils.equals(newCompString, currentService)) {
     53                     final ComponentName cn = ComponentName.unflattenFromString(newCompString);
     54                     final CharSequence label = preference.getTitle();
     55                     final Fragment confirmFragment =
     56                             AccessibilityServiceConfirmationFragment.newInstance(cn, label, true);
     57                     confirmFragment.setTargetFragment(AccessibilityShortcutServiceFragment.this, 0);
     58 
     59                     final Fragment settingsFragment = getCallbackFragment();
     60                     if (settingsFragment instanceof LeanbackSettingsFragment) {
     61                         ((LeanbackSettingsFragment) settingsFragment)
     62                                 .startImmersiveFragment(confirmFragment);
     63                     } else {
     64                         throw new IllegalStateException("Not attached to settings fragment??");
     65                     }
     66                 }
     67                 return false;
     68             };
     69 
     70     @Override
     71     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
     72         setPreferencesFromResource(R.xml.accessibility_shortcut_service, null);
     73 
     74         final PreferenceScreen screen = getPreferenceScreen();
     75         final Context themedContext = getPreferenceManager().getContext();
     76 
     77         final List<AccessibilityServiceInfo> installedServices = getContext()
     78                 .getSystemService(AccessibilityManager.class)
     79                 .getInstalledAccessibilityServiceList();
     80         final PackageManager packageManager = getContext().getPackageManager();
     81         final String currentService = AccessibilityShortcutFragment.getCurrentService(getContext());
     82         for (AccessibilityServiceInfo service : installedServices) {
     83             final RadioPreference preference = new RadioPreference(themedContext);
     84             preference.setPersistent(false);
     85             preference.setRadioGroup(SERVICE_RADIO_GROUP);
     86             preference.setOnPreferenceChangeListener(mPreferenceChangeListener);
     87 
     88             final String serviceString = service.getComponentName().flattenToString();
     89             if (TextUtils.equals(currentService, serviceString)) {
     90                 preference.setChecked(true);
     91             }
     92             preference.setKey(serviceString);
     93             preference.setTitle(service.getResolveInfo().loadLabel(packageManager));
     94 
     95             screen.addPreference(preference);
     96         }
     97     }
     98 
     99     @Override
    100     public void onAccessibilityServiceConfirmed(ComponentName componentName, boolean enabling) {
    101         final String componentString = componentName.flattenToString();
    102         Settings.Secure.putString(getContext().getContentResolver(),
    103                 Settings.Secure.ACCESSIBILITY_SHORTCUT_TARGET_SERVICE,
    104                 componentString);
    105         getFragmentManager().popBackStack();
    106     }
    107 }
    108