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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.settings.applications.assist;
     18 
     19 import android.content.ComponentName;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.pm.PackageManager;
     23 import android.content.pm.ResolveInfo;
     24 import android.service.voice.VoiceInteractionService;
     25 import android.service.voice.VoiceInteractionServiceInfo;
     26 import android.support.annotation.VisibleForTesting;
     27 
     28 import com.android.internal.app.AssistUtils;
     29 import com.android.settings.R;
     30 import com.android.settings.applications.defaultapps.DefaultAppPreferenceController;
     31 import com.android.settingslib.applications.DefaultAppInfo;
     32 
     33 import java.util.List;
     34 
     35 public class DefaultAssistPreferenceController extends DefaultAppPreferenceController {
     36 
     37     private final AssistUtils mAssistUtils;
     38     private final boolean mShowSetting;
     39     private final String mPrefKey;
     40 
     41     public DefaultAssistPreferenceController(Context context, String prefKey,
     42             boolean showSetting) {
     43         super(context);
     44         mPrefKey = prefKey;
     45         mShowSetting = showSetting;
     46         mAssistUtils = new AssistUtils(context);
     47     }
     48 
     49     @Override
     50     protected Intent getSettingIntent(DefaultAppInfo info) {
     51         if (!mShowSetting) {
     52             return null;
     53         }
     54         final ComponentName cn = mAssistUtils.getAssistComponentForUser(mUserId);
     55         if (cn == null) {
     56             return null;
     57         }
     58         final Intent probe = new Intent(VoiceInteractionService.SERVICE_INTERFACE)
     59                 .setPackage(cn.getPackageName());
     60 
     61         final PackageManager pm = mPackageManager.getPackageManager();
     62         final List<ResolveInfo> services = pm.queryIntentServices(probe, PackageManager
     63                 .GET_META_DATA);
     64         if (services == null || services.isEmpty()) {
     65             return null;
     66         }
     67         final String activity = getAssistSettingsActivity(cn, services.get(0), pm);
     68         if (activity == null) {
     69             return null;
     70         }
     71         return new Intent(Intent.ACTION_MAIN)
     72                 .setComponent(new ComponentName(cn.getPackageName(), activity));
     73     }
     74 
     75     @Override
     76     public boolean isAvailable() {
     77         return mContext.getResources().getBoolean(R.bool.config_show_assist_and_voice_input);
     78     }
     79 
     80     @Override
     81     public String getPreferenceKey() {
     82         return mPrefKey;
     83     }
     84 
     85     @Override
     86     protected DefaultAppInfo getDefaultAppInfo() {
     87         final ComponentName cn = mAssistUtils.getAssistComponentForUser(mUserId);
     88         if (cn == null) {
     89             return null;
     90         }
     91         return new DefaultAppInfo(mContext, mPackageManager, mUserId, cn);
     92     }
     93 
     94     @VisibleForTesting
     95     String getAssistSettingsActivity(ComponentName cn, ResolveInfo resolveInfo, PackageManager pm) {
     96         final VoiceInteractionServiceInfo voiceInfo =
     97             new VoiceInteractionServiceInfo(pm, resolveInfo.serviceInfo);
     98         if (!voiceInfo.getSupportsAssist()) {
     99             return null;
    100         }
    101         return voiceInfo.getSettingsActivity();
    102     }
    103 }
    104