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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 
     17 package com.android.tv.settings;
     18 
     19 import android.app.Fragment;
     20 import android.support.annotation.NonNull;
     21 import android.support.v14.preference.PreferenceDialogFragment;
     22 import android.support.v14.preference.PreferenceFragment;
     23 import android.support.v17.preference.LeanbackSettingsFragment;
     24 import android.support.v7.preference.Preference;
     25 import android.support.v7.preference.PreferenceScreen;
     26 
     27 import com.android.tv.settings.system.LeanbackPickerDialogFragment;
     28 import com.android.tv.settings.system.LeanbackPickerDialogPreference;
     29 
     30 /**
     31  * Base class for settings fragments. Handles launching fragments and dialogs in a reasonably
     32  * generic way. Subclasses should only override onPreferenceStartInitialScreen.
     33  */
     34 
     35 public abstract class BaseSettingsFragment extends LeanbackSettingsFragment {
     36     @Override
     37     public final boolean onPreferenceStartFragment(PreferenceFragment caller, Preference pref) {
     38         final Fragment f =
     39                 Fragment.instantiate(getActivity(), pref.getFragment(), pref.getExtras());
     40         f.setTargetFragment(caller, 0);
     41         if (f instanceof PreferenceFragment || f instanceof PreferenceDialogFragment) {
     42             startPreferenceFragment(f);
     43         } else {
     44             startImmersiveFragment(f);
     45         }
     46         return true;
     47     }
     48 
     49     @Override
     50     public final boolean onPreferenceStartScreen(PreferenceFragment caller, PreferenceScreen pref) {
     51         return false;
     52     }
     53 
     54     @Override
     55     public boolean onPreferenceDisplayDialog(@NonNull PreferenceFragment caller, Preference pref) {
     56         final Fragment f;
     57         if (pref instanceof LeanbackPickerDialogPreference) {
     58             final LeanbackPickerDialogPreference dialogPreference = (LeanbackPickerDialogPreference)
     59                     pref;
     60             f = dialogPreference.getType().equals("date")
     61                     ? LeanbackPickerDialogFragment.newDatePickerInstance(pref.getKey())
     62                     : LeanbackPickerDialogFragment.newTimePickerInstance(pref.getKey());
     63             f.setTargetFragment(caller, 0);
     64             startPreferenceFragment(f);
     65             return true;
     66         } else {
     67             return super.onPreferenceDisplayDialog(caller, pref);
     68         }
     69     }
     70 }
     71