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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 
     26 import com.android.settingslib.drawer.SettingsDrawerActivity;
     27 import com.android.systemui.R;
     28 
     29 public class TunerActivity extends SettingsDrawerActivity implements
     30         PreferenceFragment.OnPreferenceStartFragmentCallback,
     31         PreferenceFragment.OnPreferenceStartScreenCallback {
     32 
     33     private static final String TAG_TUNER = "tuner";
     34 
     35     protected void onCreate(Bundle savedInstanceState) {
     36         super.onCreate(savedInstanceState);
     37 
     38         if (getFragmentManager().findFragmentByTag(TAG_TUNER) == null) {
     39             final String action = getIntent().getAction();
     40             boolean showDemoMode = action != null && action.equals(
     41                     "com.android.settings.action.DEMO_MODE");
     42             final PreferenceFragment fragment = showDemoMode ? new DemoModeFragment()
     43                     : new TunerFragment();
     44             getFragmentManager().beginTransaction().replace(R.id.content_frame,
     45                     fragment, TAG_TUNER).commit();
     46         }
     47     }
     48 
     49     @Override
     50     public void onBackPressed() {
     51         if (!getFragmentManager().popBackStackImmediate()) {
     52             super.onBackPressed();
     53         }
     54     }
     55 
     56     @Override
     57     public boolean onPreferenceStartFragment(PreferenceFragment caller, Preference pref) {
     58         try {
     59             Class<?> cls = Class.forName(pref.getFragment());
     60             Fragment fragment = (Fragment) cls.newInstance();
     61             FragmentTransaction transaction = getFragmentManager().beginTransaction();
     62             setTitle(pref.getTitle());
     63             transaction.replace(R.id.content_frame, fragment);
     64             transaction.addToBackStack("PreferenceFragment");
     65             transaction.commit();
     66             return true;
     67         } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
     68             Log.d("TunerActivity", "Problem launching fragment", e);
     69             return false;
     70         }
     71     }
     72 
     73     @Override
     74     public boolean onPreferenceStartScreen(PreferenceFragment caller, PreferenceScreen pref) {
     75         FragmentTransaction transaction = getFragmentManager().beginTransaction();
     76         SubSettingsFragment fragment = new SubSettingsFragment();
     77         final Bundle b = new Bundle(1);
     78         b.putString(PreferenceFragment.ARG_PREFERENCE_ROOT, pref.getKey());
     79         fragment.setArguments(b);
     80         fragment.setTargetFragment(caller, 0);
     81         transaction.replace(R.id.content_frame, fragment);
     82         transaction.addToBackStack("PreferenceFragment");
     83         transaction.commit();
     84         return true;
     85     }
     86 
     87     public static class SubSettingsFragment extends PreferenceFragment {
     88         @Override
     89         public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
     90             setPreferenceScreen((PreferenceScreen) ((PreferenceFragment) getTargetFragment())
     91                     .getPreferenceScreen().findPreference(rootKey));
     92         }
     93     }
     94 
     95 }
     96