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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 package com.android.settings.accessibility;
     17 
     18 import static android.content.DialogInterface.BUTTON_POSITIVE;
     19 
     20 import android.accessibilityservice.AccessibilityServiceInfo;
     21 import android.app.Activity;
     22 import android.app.Dialog;
     23 import android.app.DialogFragment;
     24 import android.app.Fragment;
     25 import android.content.ComponentName;
     26 import android.content.DialogInterface;
     27 import android.os.Binder;
     28 import android.os.Bundle;
     29 import android.os.IBinder;
     30 import android.os.UserHandle;
     31 import android.provider.Settings;
     32 import android.text.TextUtils;
     33 import android.view.accessibility.AccessibilityManager;
     34 
     35 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
     36 import com.android.settings.applications.defaultapps.DefaultAppInfo;
     37 import com.android.settings.applications.defaultapps.DefaultAppPickerFragment;
     38 import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
     39 import com.android.settings.widget.RadioButtonPreference;
     40 import com.android.settingslib.accessibility.AccessibilityUtils;
     41 
     42 import java.util.ArrayList;
     43 import java.util.List;
     44 
     45 /**
     46  * Fragment for picking accessibility shortcut service
     47  */
     48 public class ShortcutServicePickerFragment extends DefaultAppPickerFragment {
     49 
     50     @Override
     51     public int getMetricsCategory() {
     52         return MetricsEvent.ACCESSIBILITY_TOGGLE_GLOBAL_GESTURE;
     53     }
     54 
     55     @Override
     56     protected List<? extends DefaultAppInfo> getCandidates() {
     57         final AccessibilityManager accessibilityManager = getContext()
     58                 .getSystemService(AccessibilityManager.class);
     59         final List<AccessibilityServiceInfo> installedServices =
     60                 accessibilityManager.getInstalledAccessibilityServiceList();
     61         final int numInstalledServices = installedServices.size();
     62 
     63         List<DefaultAppInfo> candidates = new ArrayList<>(numInstalledServices);
     64         for (int i = 0; i < numInstalledServices; i++) {
     65             AccessibilityServiceInfo installedServiceInfo = installedServices.get(i);
     66             candidates.add(new DefaultAppInfo(mPm,
     67                     UserHandle.myUserId(),
     68                     installedServiceInfo.getComponentName(),
     69                     (String) installedServiceInfo.loadSummary(mPm.getPackageManager()),
     70                     true /* enabled */));
     71         }
     72 
     73         return candidates;
     74     }
     75 
     76     @Override
     77     protected String getDefaultKey() {
     78         String shortcutServiceString = AccessibilityUtils
     79                 .getShortcutTargetServiceComponentNameString(getContext(), UserHandle.myUserId());
     80         if (shortcutServiceString != null) {
     81             ComponentName shortcutName = ComponentName.unflattenFromString(shortcutServiceString);
     82             if (shortcutName != null) {
     83                 return shortcutName.flattenToString();
     84             }
     85         }
     86         return null;
     87     }
     88 
     89     @Override
     90     protected boolean setDefaultKey(String key) {
     91         Settings.Secure.putString(getContext().getContentResolver(),
     92                 Settings.Secure.ACCESSIBILITY_SHORTCUT_TARGET_SERVICE, key);
     93         return true;
     94     }
     95 
     96     @Override
     97     public void onRadioButtonClicked(RadioButtonPreference selected) {
     98         final String selectedKey = selected.getKey();
     99 
    100         final Activity activity = getActivity();
    101         if (TextUtils.isEmpty(selectedKey)) {
    102             super.onRadioButtonClicked(selected);
    103         } else if (activity != null) {
    104             final DialogFragment fragment = ConfirmationDialogFragment.newInstance(
    105                     this, selectedKey);
    106             fragment.show(activity.getFragmentManager(), ConfirmationDialogFragment.TAG);
    107         }
    108     }
    109 
    110     private void onServiceConfirmed(String serviceKey) {
    111         onRadioButtonConfirmed(serviceKey);
    112     }
    113 
    114     public static class ConfirmationDialogFragment extends InstrumentedDialogFragment
    115             implements DialogInterface.OnClickListener {
    116         private static final String EXTRA_KEY = "extra_key";
    117         private static final String TAG = "ConfirmationDialogFragment";
    118         private IBinder mToken;
    119 
    120         public static ConfirmationDialogFragment newInstance(ShortcutServicePickerFragment parent,
    121                 String key) {
    122             final ConfirmationDialogFragment fragment = new ConfirmationDialogFragment();
    123             final Bundle argument = new Bundle();
    124             argument.putString(EXTRA_KEY, key);
    125             fragment.setArguments(argument);
    126             fragment.setTargetFragment(parent, 0);
    127             fragment.mToken = new Binder();
    128             return fragment;
    129         }
    130 
    131         @Override
    132         public int getMetricsCategory() {
    133             return MetricsEvent.ACCESSIBILITY_TOGGLE_GLOBAL_GESTURE;
    134         }
    135 
    136         @Override
    137         public Dialog onCreateDialog(Bundle savedInstanceState) {
    138             final Bundle bundle = getArguments();
    139             final String key = bundle.getString(EXTRA_KEY);
    140             final ComponentName serviceComponentName = ComponentName.unflattenFromString(key);
    141             final AccessibilityManager accessibilityManager = getActivity()
    142                     .getSystemService(AccessibilityManager.class);
    143             AccessibilityServiceInfo info = accessibilityManager
    144                     .getInstalledServiceInfoWithComponentName(serviceComponentName);
    145             return AccessibilityServiceWarning.createCapabilitiesDialog(getActivity(), info, this);
    146         }
    147 
    148         @Override
    149         public void onClick(DialogInterface dialog, int which) {
    150             final Fragment fragment = getTargetFragment();
    151             if ((which == BUTTON_POSITIVE) && (fragment instanceof DefaultAppPickerFragment)) {
    152                 final Bundle bundle = getArguments();
    153                 ((ShortcutServicePickerFragment) fragment).onServiceConfirmed(
    154                         bundle.getString(EXTRA_KEY));
    155             }
    156         }
    157     }
    158 }
    159