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      1 /*
      2  * Copyright (C) 2015 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.accessibility;
     18 
     19 import android.accessibilityservice.AccessibilityServiceInfo;
     20 import android.content.ComponentName;
     21 import android.content.ContentResolver;
     22 import android.content.Context;
     23 import android.content.pm.ServiceInfo;
     24 import android.os.Bundle;
     25 import android.provider.Settings;
     26 import android.support.v7.preference.Preference;
     27 import android.text.TextUtils;
     28 import android.view.accessibility.AccessibilityManager;
     29 
     30 import com.android.internal.logging.MetricsProto.MetricsEvent;
     31 import com.android.settings.DialogCreatable;
     32 import com.android.settings.R;
     33 import com.android.settings.SettingsPreferenceFragment;
     34 
     35 import java.util.List;
     36 
     37 /**
     38  * Activity with the accessibility settings specific to Setup Wizard.
     39  */
     40 public class AccessibilitySettingsForSetupWizard extends SettingsPreferenceFragment
     41         implements DialogCreatable, Preference.OnPreferenceChangeListener {
     42 
     43     private static final String TAG = AccessibilitySettingsForSetupWizard.class.getSimpleName();
     44 
     45     // Preferences.
     46     private static final String DISPLAY_MAGNIFICATION_PREFERENCE =
     47             "screen_magnification_preference";
     48     private static final String SCREEN_READER_PREFERENCE = "screen_reader_preference";
     49     private static final String FONT_SIZE_PREFERENCE = "font_size_preference";
     50 
     51     // Preference controls.
     52     private Preference mDisplayMagnificationPreference;
     53     private Preference mScreenReaderPreference;
     54 
     55     @Override
     56     protected int getMetricsCategory() {
     57         return MetricsEvent.SUW_ACCESSIBILITY;
     58     }
     59 
     60     @Override
     61     public void onCreate(Bundle icicle) {
     62         super.onCreate(icicle);
     63         addPreferencesFromResource(R.xml.accessibility_settings_for_setup_wizard);
     64 
     65         mDisplayMagnificationPreference = findPreference(DISPLAY_MAGNIFICATION_PREFERENCE);
     66         mScreenReaderPreference = findPreference(SCREEN_READER_PREFERENCE);
     67     }
     68 
     69     @Override
     70     public void onResume() {
     71         super.onResume();
     72         updateScreenReaderPreference();
     73     }
     74 
     75     @Override
     76     public void onActivityCreated(Bundle savedInstanceState) {
     77         super.onActivityCreated(savedInstanceState);
     78         setHasOptionsMenu(false);
     79     }
     80 
     81     @Override
     82     public boolean onPreferenceChange(Preference preference, Object newValue) {
     83         return false;
     84     }
     85 
     86     @Override
     87     public boolean onPreferenceTreeClick(Preference preference) {
     88         if (mDisplayMagnificationPreference == preference) {
     89             Bundle extras = mDisplayMagnificationPreference.getExtras();
     90             extras.putString(AccessibilitySettings.EXTRA_TITLE,
     91                     getString(R.string.accessibility_screen_magnification_title));
     92             extras.putCharSequence(AccessibilitySettings.EXTRA_SUMMARY,
     93                     getText(R.string.accessibility_screen_magnification_summary));
     94             extras.putBoolean(AccessibilitySettings.EXTRA_CHECKED,
     95                     Settings.Secure.getInt(getContentResolver(),
     96                     Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED, 0) == 1);
     97         }
     98 
     99         return super.onPreferenceTreeClick(preference);
    100     }
    101 
    102     private AccessibilityServiceInfo findFirstServiceWithSpokenFeedback() {
    103         final AccessibilityManager manager =
    104                 getActivity().getSystemService(AccessibilityManager.class);
    105         final List<AccessibilityServiceInfo> accessibilityServices =
    106                 manager.getInstalledAccessibilityServiceList();
    107         for (AccessibilityServiceInfo info : accessibilityServices) {
    108             if ((info.feedbackType & AccessibilityServiceInfo.FEEDBACK_SPOKEN) != 0) {
    109                 return info;
    110             }
    111         }
    112 
    113         return null;
    114     }
    115 
    116     private void updateScreenReaderPreference() {
    117         // Find a screen reader.
    118         AccessibilityServiceInfo info = findFirstServiceWithSpokenFeedback();
    119         if (info == null) {
    120             mScreenReaderPreference.setEnabled(false);
    121         } else {
    122             mScreenReaderPreference.setEnabled(true);
    123         }
    124 
    125         ServiceInfo serviceInfo = info.getResolveInfo().serviceInfo;
    126         String title = info.getResolveInfo().loadLabel(getPackageManager()).toString();
    127         mScreenReaderPreference.setTitle(title);
    128 
    129         ComponentName componentName = new ComponentName(serviceInfo.packageName, serviceInfo.name);
    130         mScreenReaderPreference.setKey(componentName.flattenToString());
    131 
    132         // Update the extras.
    133         Bundle extras = mScreenReaderPreference.getExtras();
    134         extras.putParcelable(AccessibilitySettings.EXTRA_COMPONENT_NAME, componentName);
    135 
    136         extras.putString(AccessibilitySettings.EXTRA_PREFERENCE_KEY,
    137                 mScreenReaderPreference.getKey());
    138         extras.putString(AccessibilitySettings.EXTRA_TITLE, title);
    139 
    140         String description = info.loadDescription(getPackageManager());
    141         if (TextUtils.isEmpty(description)) {
    142             description = getString(R.string.accessibility_service_default_description);
    143         }
    144         extras.putString(AccessibilitySettings.EXTRA_SUMMARY, description);
    145     }
    146 }
    147