AppInfoPreferenceControllerBase.java revision 6eb88778484fde825092e8b880dda7948fbdb042 
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.appinfo;
18
19import android.app.slice.Slice;
20import android.content.Context;
21import android.support.v7.preference.Preference;
22import android.support.v7.preference.PreferenceScreen;
23import android.text.TextUtils;
24
25import com.android.settings.SettingsPreferenceFragment;
26import com.android.settings.applications.AppInfoDashboardFragment;
27import com.android.settings.core.BasePreferenceController;
28
29/*
30 * Abstract base controller for the app detail preferences that refresh the state when the app state
31 * changes and launch a specific detail fragment when the preference is clicked.
32 */
33public abstract class AppInfoPreferenceControllerBase extends BasePreferenceController
34        implements AppInfoDashboardFragment.Callback {
35
36    protected final AppInfoDashboardFragment mParent;
37    private final Class<? extends SettingsPreferenceFragment> mDetailFragmenClass;
38
39    protected Preference mPreference;
40
41    public AppInfoPreferenceControllerBase(Context context, AppInfoDashboardFragment parent,
42            String preferenceKey) {
43        super(context, preferenceKey);
44        mParent = parent;
45        mDetailFragmenClass = getDetailFragmentClass();
46    }
47
48    @Override
49    public int getAvailabilityStatus() {
50        return AVAILABLE;
51    }
52
53    @Override
54    public Slice getSettingSlice() {
55        return null;
56    }
57
58    @Override
59    public void displayPreference(PreferenceScreen screen) {
60        super.displayPreference(screen);
61        mPreference = screen.findPreference(getPreferenceKey());
62    }
63
64    @Override
65    public boolean handlePreferenceTreeClick(Preference preference) {
66        if (TextUtils.equals(preference.getKey(), mPreferenceKey) && mDetailFragmenClass != null) {
67            AppInfoDashboardFragment.startAppInfoFragment(
68                    mDetailFragmenClass, -1, mParent, mParent.getAppEntry());
69            return true;
70        }
71        return false;
72    }
73
74    @Override
75    public void refreshUi() {
76        updateState(mPreference);
77    }
78
79    /**
80     * Gets the fragment class to be launched when the preference is clicked.
81     * @return the fragment to launch
82     */
83    protected Class<? extends SettingsPreferenceFragment> getDetailFragmentClass() {
84        return null;
85    }
86
87}
88