1 /*
2  * Copyright (C) 2015 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.systemui.tuner;
17 
18 import android.app.Activity;
19 import android.app.Fragment;
20 import android.app.FragmentTransaction;
21 import android.os.Bundle;
22 import android.util.Log;
23 import android.view.MenuItem;
24 import android.view.Window;
25 import android.view.WindowManager;
26 import android.widget.Toolbar;
27 
28 import androidx.preference.Preference;
29 import androidx.preference.PreferenceFragment;
30 import androidx.preference.PreferenceScreen;
31 
32 import com.android.systemui.Dependency;
33 import com.android.systemui.R;
34 import com.android.systemui.SystemUIFactory;
35 import com.android.systemui.fragments.FragmentService;
36 
37 public class TunerActivity extends Activity implements
38         PreferenceFragment.OnPreferenceStartFragmentCallback,
39         PreferenceFragment.OnPreferenceStartScreenCallback {
40 
41     private static final String TAG_TUNER = "tuner";
42 
onCreate(Bundle savedInstanceState)43     protected void onCreate(Bundle savedInstanceState) {
44         super.onCreate(savedInstanceState);
45 
46         getWindow().addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
47         requestWindowFeature(Window.FEATURE_NO_TITLE);
48         setContentView(R.layout.tuner_activity);
49         Toolbar toolbar = findViewById(R.id.action_bar);
50         if (toolbar != null) {
51             setActionBar(toolbar);
52         }
53 
54         Dependency.initDependencies(SystemUIFactory.getInstance().getRootComponent());
55 
56         if (getFragmentManager().findFragmentByTag(TAG_TUNER) == null) {
57             final String action = getIntent().getAction();
58             boolean showDemoMode = action != null && action.equals(
59                     "com.android.settings.action.DEMO_MODE");
60             final PreferenceFragment fragment = showDemoMode ? new DemoModeFragment()
61                     : new TunerFragment();
62             getFragmentManager().beginTransaction().replace(R.id.content_frame,
63                     fragment, TAG_TUNER).commit();
64         }
65     }
66 
67     @Override
onDestroy()68     protected void onDestroy() {
69         super.onDestroy();
70         Dependency.destroy(FragmentService.class, s -> s.destroyAll());
71         Dependency.clearDependencies();
72     }
73 
74     @Override
onMenuItemSelected(int featureId, MenuItem item)75     public boolean onMenuItemSelected(int featureId, MenuItem item) {
76         if (item.getItemId() == android.R.id.home) {
77             onBackPressed();
78             return true;
79         }
80         return super.onMenuItemSelected(featureId, item);
81     }
82 
83     @Override
onBackPressed()84     public void onBackPressed() {
85         if (!getFragmentManager().popBackStackImmediate()) {
86             super.onBackPressed();
87         }
88     }
89 
90     @Override
onPreferenceStartFragment(PreferenceFragment caller, Preference pref)91     public boolean onPreferenceStartFragment(PreferenceFragment caller, Preference pref) {
92         try {
93             Class<?> cls = Class.forName(pref.getFragment());
94             Fragment fragment = (Fragment) cls.newInstance();
95             final Bundle b = new Bundle(1);
96             b.putString(PreferenceFragment.ARG_PREFERENCE_ROOT, pref.getKey());
97             fragment.setArguments(b);
98             FragmentTransaction transaction = getFragmentManager().beginTransaction();
99             setTitle(pref.getTitle());
100             transaction.replace(R.id.content_frame, fragment);
101             transaction.addToBackStack("PreferenceFragment");
102             transaction.commit();
103             return true;
104         } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
105             Log.d("TunerActivity", "Problem launching fragment", e);
106             return false;
107         }
108     }
109 
110     @Override
onPreferenceStartScreen(PreferenceFragment caller, PreferenceScreen pref)111     public boolean onPreferenceStartScreen(PreferenceFragment caller, PreferenceScreen pref) {
112         FragmentTransaction transaction = getFragmentManager().beginTransaction();
113         SubSettingsFragment fragment = new SubSettingsFragment();
114         final Bundle b = new Bundle(1);
115         b.putString(PreferenceFragment.ARG_PREFERENCE_ROOT, pref.getKey());
116         fragment.setArguments(b);
117         fragment.setTargetFragment(caller, 0);
118         transaction.replace(R.id.content_frame, fragment);
119         transaction.addToBackStack("PreferenceFragment");
120         transaction.commit();
121         return true;
122     }
123 
124     public static class SubSettingsFragment extends PreferenceFragment {
125         private PreferenceScreen mParentScreen;
126 
127         @Override
onCreatePreferences(Bundle savedInstanceState, String rootKey)128         public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
129             mParentScreen =
130                     (PreferenceScreen) ((PreferenceFragment) getTargetFragment())
131                             .getPreferenceScreen().findPreference(rootKey);
132             PreferenceScreen screen =
133                     getPreferenceManager().createPreferenceScreen(
134                             getPreferenceManager().getContext());
135             setPreferenceScreen(screen);
136             // Copy all the preferences over to this screen so they go into the attached state.
137             while (mParentScreen.getPreferenceCount() > 0) {
138                 Preference p = mParentScreen.getPreference(0);
139                 mParentScreen.removePreference(p);
140                 screen.addPreference(p);
141             }
142         }
143 
144         @Override
onDestroy()145         public void onDestroy() {
146             super.onDestroy();
147             // Copy all the preferences back so we don't lose them.
148             PreferenceScreen screen = getPreferenceScreen();
149             while (screen.getPreferenceCount() > 0) {
150                 Preference p = screen.getPreference(0);
151                 screen.removePreference(p);
152                 mParentScreen.addPreference(p);
153             }
154         }
155     }
156 
157 }
158