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 21 import androidx.annotation.NonNull; 22 import androidx.leanback.preference.LeanbackSettingsFragment; 23 import androidx.preference.Preference; 24 import androidx.preference.PreferenceDialogFragment; 25 import androidx.preference.PreferenceFragment; 26 import androidx.preference.PreferenceScreen; 27 28 import com.android.tv.settings.system.LeanbackPickerDialogFragment; 29 import com.android.tv.settings.system.LeanbackPickerDialogPreference; 30 31 /** 32 * Base class for settings fragments. Handles launching fragments and dialogs in a reasonably 33 * generic way. Subclasses should only override onPreferenceStartInitialScreen. 34 */ 35 36 public abstract class BaseSettingsFragment extends LeanbackSettingsFragment { 37 @Override onPreferenceStartFragment(PreferenceFragment caller, Preference pref)38 public final boolean onPreferenceStartFragment(PreferenceFragment caller, Preference pref) { 39 final Fragment f = 40 Fragment.instantiate(getActivity(), pref.getFragment(), pref.getExtras()); 41 f.setTargetFragment(caller, 0); 42 if (f instanceof PreferenceFragment || f instanceof PreferenceDialogFragment) { 43 startPreferenceFragment(f); 44 } else { 45 startImmersiveFragment(f); 46 } 47 return true; 48 } 49 50 @Override onPreferenceStartScreen(PreferenceFragment caller, PreferenceScreen pref)51 public final boolean onPreferenceStartScreen(PreferenceFragment caller, PreferenceScreen pref) { 52 return false; 53 } 54 55 @Override onPreferenceDisplayDialog(@onNull PreferenceFragment caller, Preference pref)56 public boolean onPreferenceDisplayDialog(@NonNull PreferenceFragment caller, Preference pref) { 57 final Fragment f; 58 if (pref instanceof LeanbackPickerDialogPreference) { 59 final LeanbackPickerDialogPreference dialogPreference = (LeanbackPickerDialogPreference) 60 pref; 61 f = dialogPreference.getType().equals("date") 62 ? LeanbackPickerDialogFragment.newDatePickerInstance(pref.getKey()) 63 : LeanbackPickerDialogFragment.newTimePickerInstance(pref.getKey()); 64 f.setTargetFragment(caller, 0); 65 startPreferenceFragment(f); 66 return true; 67 } else { 68 return super.onPreferenceDisplayDialog(caller, pref); 69 } 70 } 71 } 72