1 /* 2 * Copyright (C) 2014 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.dialog; 18 19 import android.app.Activity; 20 import android.app.DialogFragment; 21 22 /** 23 * Provides the safe dismiss feature regardless of the DialogFragment's life cycle. 24 */ 25 public class SafeDismissDialogFragment extends DialogFragment { 26 private boolean mAttached = false; 27 private boolean mDismissPending = false; 28 29 @Override 30 public void onAttach(Activity activity) { 31 super.onAttach(activity); 32 mAttached = true; 33 if (mDismissPending) { 34 mDismissPending = false; 35 dismiss(); 36 return; 37 } 38 } 39 40 @Override 41 public void onDetach() { 42 mAttached = false; 43 super.onDetach(); 44 } 45 46 /** 47 * Dismiss safely regardless of the DialogFragment's life cycle. 48 */ 49 @Override 50 public void dismiss() { 51 if (!mAttached) { 52 // dismiss() before getFragmentManager() is set cause NPE in dismissInternal(). 53 // FragmentMananager is set when a fragment is used in a trasaction, 54 // so wait here until we can dismiss safely. 55 mDismissPending = true; 56 } else { 57 super.dismiss(); 58 } 59 } 60 } 61
