DefaultAppPreferenceController.java revision a278962dbc545f69ca3712159d438f2e50dab0a5 
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
17package com.android.settings.applications.defaultapps;
18
19import android.content.Context;
20import android.content.Intent;
21import android.os.UserHandle;
22import android.os.UserManager;
23import android.support.v7.preference.Preference;
24import android.text.TextUtils;
25import android.util.Log;
26
27import com.android.settings.R;
28import com.android.settings.applications.PackageManagerWrapper;
29import com.android.settings.applications.PackageManagerWrapperImpl;
30import com.android.settings.core.PreferenceController;
31import com.android.settings.widget.GearPreference;
32
33public 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 = null;
53        if (app != null) {
54            defaultAppLabel = app.loadLabel();
55        }
56        if (!TextUtils.isEmpty(defaultAppLabel)) {
57            preference.setSummary(defaultAppLabel);
58        } else {
59            Log.d(TAG, "No default app");
60            preference.setSummary(R.string.app_list_preference_none);
61        }
62        mayUpdateGearIcon(app, preference);
63    }
64
65    private void mayUpdateGearIcon(DefaultAppInfo app, Preference preference) {
66        if (!(preference instanceof GearPreference)) {
67            return;
68        }
69        final Intent settingIntent = getSettingIntent(app);
70        if (settingIntent != null) {
71            ((GearPreference) preference).setOnGearClickListener(
72                    p -> mContext.startActivity(settingIntent));
73        } else {
74            ((GearPreference) preference).setOnGearClickListener(null);
75        }
76    }
77
78    protected abstract DefaultAppInfo getDefaultAppInfo();
79
80    /**
81     * Returns an optional intent that will be launched when clicking "gear" icon.
82     */
83    protected Intent getSettingIntent(DefaultAppInfo info) {
84        //By default return null. It's up to subclasses to provide logic.
85        return null;
86    }
87}
88