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      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.Fragment;
     19 import android.app.FragmentTransaction;
     20 import android.os.Bundle;
     21 import android.support.v14.preference.PreferenceFragment;
     22 import android.support.v7.preference.Preference;
     23 import android.support.v7.preference.PreferenceScreen;
     24 import android.util.Log;
     25 import android.view.MenuItem;
     26 
     27 import com.android.settingslib.drawer.SettingsDrawerActivity;
     28 import com.android.systemui.Dependency;
     29 import com.android.systemui.R;
     30 import com.android.systemui.fragments.FragmentService;
     31 
     32 public class TunerActivity extends SettingsDrawerActivity implements
     33         PreferenceFragment.OnPreferenceStartFragmentCallback,
     34         PreferenceFragment.OnPreferenceStartScreenCallback {
     35 
     36     static final String ACTIVITY_ALIAS_NAME = "com.android.systemui.tuner.TunerSettingLink";
     37 
     38     private static final String TAG_TUNER = "tuner";
     39 
     40     protected void onCreate(Bundle savedInstanceState) {
     41         super.onCreate(savedInstanceState);
     42         Dependency.initDependencies(this);
     43 
     44         if (getFragmentManager().findFragmentByTag(TAG_TUNER) == null) {
     45             final String action = getIntent().getAction();
     46             boolean showDemoMode = action != null && action.equals(
     47                     "com.android.settings.action.DEMO_MODE");
     48             final PreferenceFragment fragment = showDemoMode ? new DemoModeFragment()
     49                     : new TunerFragment();
     50             getFragmentManager().beginTransaction().replace(R.id.content_frame,
     51                     fragment, TAG_TUNER).commit();
     52         }
     53     }
     54 
     55     @Override
     56     protected void onDestroy() {
     57         super.onDestroy();
     58         Dependency.destroy(FragmentService.class, s -> s.destroyAll());
     59         Dependency.clearDependencies();
     60     }
     61 
     62     @Override
     63     public boolean onMenuItemSelected(int featureId, MenuItem item) {
     64         if (item.getItemId() == android.R.id.home) {
     65             onBackPressed();
     66             return true;
     67         }
     68         return super.onMenuItemSelected(featureId, item);
     69     }
     70 
     71     @Override
     72     public void onBackPressed() {
     73         if (!getFragmentManager().popBackStackImmediate()) {
     74             super.onBackPressed();
     75         }
     76     }
     77 
     78     @Override
     79     public boolean onPreferenceStartFragment(PreferenceFragment caller, Preference pref) {
     80         try {
     81             Class<?> cls = Class.forName(pref.getFragment());
     82             Fragment fragment = (Fragment) cls.newInstance();
     83             final Bundle b = new Bundle(1);
     84             b.putString(PreferenceFragment.ARG_PREFERENCE_ROOT, pref.getKey());
     85             fragment.setArguments(b);
     86             FragmentTransaction transaction = getFragmentManager().beginTransaction();
     87             setTitle(pref.getTitle());
     88             transaction.replace(R.id.content_frame, fragment);
     89             transaction.addToBackStack("PreferenceFragment");
     90             transaction.commit();
     91             return true;
     92         } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
     93             Log.d("TunerActivity", "Problem launching fragment", e);
     94             return false;
     95         }
     96     }
     97 
     98     @Override
     99     public boolean onPreferenceStartScreen(PreferenceFragment caller, PreferenceScreen pref) {
    100         FragmentTransaction transaction = getFragmentManager().beginTransaction();
    101         SubSettingsFragment fragment = new SubSettingsFragment();
    102         final Bundle b = new Bundle(1);
    103         b.putString(PreferenceFragment.ARG_PREFERENCE_ROOT, pref.getKey());
    104         fragment.setArguments(b);
    105         fragment.setTargetFragment(caller, 0);
    106         transaction.replace(R.id.content_frame, fragment);
    107         transaction.addToBackStack("PreferenceFragment");
    108         transaction.commit();
    109         return true;
    110     }
    111 
    112     public static class SubSettingsFragment extends PreferenceFragment {
    113         private PreferenceScreen mParentScreen;
    114 
    115         @Override
    116         public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
    117             mParentScreen =
    118                     (PreferenceScreen) ((PreferenceFragment) getTargetFragment())
    119                             .getPreferenceScreen().findPreference(rootKey);
    120             PreferenceScreen screen =
    121                     getPreferenceManager().createPreferenceScreen(
    122                             getPreferenceManager().getContext());
    123             setPreferenceScreen(screen);
    124             // Copy all the preferences over to this screen so they go into the attached state.
    125             while (mParentScreen.getPreferenceCount() > 0) {
    126                 Preference p = mParentScreen.getPreference(0);
    127                 mParentScreen.removePreference(p);
    128                 screen.addPreference(p);
    129             }
    130         }
    131 
    132         @Override
    133         public void onDestroy() {
    134             super.onDestroy();
    135             // Copy all the preferences back so we don't lose them.
    136             PreferenceScreen screen = getPreferenceScreen();
    137             while (screen.getPreferenceCount() > 0) {
    138                 Preference p = screen.getPreference(0);
    139                 screen.removePreference(p);
    140                 mParentScreen.addPreference(p);
    141             }
    142         }
    143     }
    144 
    145 }
    146