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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.defaultapps;
     18 
     19 import android.content.Context;
     20 import android.content.Intent;
     21 import android.os.UserHandle;
     22 import android.os.UserManager;
     23 import android.support.v7.preference.Preference;
     24 import android.text.TextUtils;
     25 import android.util.Log;
     26 
     27 import com.android.settings.R;
     28 import com.android.settings.applications.PackageManagerWrapper;
     29 import com.android.settings.applications.PackageManagerWrapperImpl;
     30 import com.android.settings.core.PreferenceController;
     31 import com.android.settings.widget.GearPreference;
     32 
     33 public abstract class DefaultAppPreferenceController extends PreferenceController {
     34 
     35     private static final String TAG = "DefaultAppPrefControl";
     36 
     37     protected final PackageManagerWrapper mPackageManager;
     38     protected final UserManager mUserManager;
     39 
     40     protected int mUserId;
     41 
     42     public DefaultAppPreferenceController(Context context) {
     43         super(context);
     44         mPackageManager = new PackageManagerWrapperImpl(context.getPackageManager());
     45         mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
     46         mUserId = UserHandle.myUserId();
     47     }
     48 
     49     @Override
     50     public void updateState(Preference preference) {
     51         final DefaultAppInfo app = getDefaultAppInfo();
     52         CharSequence defaultAppLabel = getDefaultAppLabel();
     53         if (!TextUtils.isEmpty(defaultAppLabel)) {
     54             preference.setSummary(defaultAppLabel);
     55         } else {
     56             Log.d(TAG, "No default app");
     57             preference.setSummary(R.string.app_list_preference_none);
     58         }
     59         mayUpdateGearIcon(app, preference);
     60     }
     61 
     62     private void mayUpdateGearIcon(DefaultAppInfo app, Preference preference) {
     63         if (!(preference instanceof GearPreference)) {
     64             return;
     65         }
     66         final Intent settingIntent = getSettingIntent(app);
     67         if (settingIntent != null) {
     68             ((GearPreference) preference).setOnGearClickListener(
     69                     p -> mContext.startActivity(settingIntent));
     70         } else {
     71             ((GearPreference) preference).setOnGearClickListener(null);
     72         }
     73     }
     74 
     75     protected abstract DefaultAppInfo getDefaultAppInfo();
     76 
     77     /**
     78      * Returns an optional intent that will be launched when clicking "gear" icon.
     79      */
     80     protected Intent getSettingIntent(DefaultAppInfo info) {
     81         //By default return null. It's up to subclasses to provide logic.
     82         return null;
     83     }
     84 
     85     public CharSequence getDefaultAppLabel() {
     86         if (!isAvailable()) {
     87             return null;
     88         }
     89         final DefaultAppInfo app = getDefaultAppInfo();
     90         if (app != null) {
     91             return app.loadLabel();
     92         }
     93         return null;
     94     }
     95 }
     96