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 android.support.v17.preference; 18 19 import android.app.Fragment; 20 import android.os.Build; 21 import android.os.Bundle; 22 import android.support.v7.preference.DialogPreference; 23 24 public class LeanbackPreferenceDialogFragment extends Fragment { 25 26 public static final String ARG_KEY = "key"; 27 28 private DialogPreference mPreference; 29 LeanbackPreferenceDialogFragment()30 public LeanbackPreferenceDialogFragment() { 31 if (Build.VERSION.SDK_INT >= 21) { 32 LeanbackPreferenceFragmentTransitionHelperApi21.addTransitions(this); 33 } 34 } 35 36 @Override onCreate(Bundle savedInstanceState)37 public void onCreate(Bundle savedInstanceState) { 38 super.onCreate(savedInstanceState); 39 40 final Fragment rawFragment = getTargetFragment(); 41 if (!(rawFragment instanceof DialogPreference.TargetFragment)) { 42 throw new IllegalStateException("Target fragment " + rawFragment 43 + " must implement TargetFragment interface"); 44 } 45 } 46 getPreference()47 public DialogPreference getPreference() { 48 if (mPreference == null) { 49 final String key = getArguments().getString(ARG_KEY); 50 final DialogPreference.TargetFragment fragment = 51 (DialogPreference.TargetFragment) getTargetFragment(); 52 mPreference = (DialogPreference) fragment.findPreference(key); 53 } 54 return mPreference; 55 } 56 } 57