1 /* 2 * Copyright (C) 2017 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.app; 18 19 import android.content.Context; 20 import android.os.Bundle; 21 import android.os.Parcel; 22 import android.os.Parcelable; 23 import android.util.Log; 24 25 final class FragmentState implements Parcelable { 26 final String mClassName; 27 final int mIndex; 28 final boolean mFromLayout; 29 final int mFragmentId; 30 final int mContainerId; 31 final String mTag; 32 final boolean mRetainInstance; 33 final boolean mDetached; 34 final Bundle mArguments; 35 final boolean mHidden; 36 37 Bundle mSavedFragmentState; 38 39 Fragment mInstance; 40 FragmentState(Fragment frag)41 FragmentState(Fragment frag) { 42 mClassName = frag.getClass().getName(); 43 mIndex = frag.mIndex; 44 mFromLayout = frag.mFromLayout; 45 mFragmentId = frag.mFragmentId; 46 mContainerId = frag.mContainerId; 47 mTag = frag.mTag; 48 mRetainInstance = frag.mRetainInstance; 49 mDetached = frag.mDetached; 50 mArguments = frag.mArguments; 51 mHidden = frag.mHidden; 52 } 53 FragmentState(Parcel in)54 FragmentState(Parcel in) { 55 mClassName = in.readString(); 56 mIndex = in.readInt(); 57 mFromLayout = in.readInt() != 0; 58 mFragmentId = in.readInt(); 59 mContainerId = in.readInt(); 60 mTag = in.readString(); 61 mRetainInstance = in.readInt() != 0; 62 mDetached = in.readInt() != 0; 63 mArguments = in.readBundle(); 64 mHidden = in.readInt() != 0; 65 mSavedFragmentState = in.readBundle(); 66 } 67 instantiate(FragmentHostCallback host, FragmentContainer container, Fragment parent, FragmentManagerNonConfig childNonConfig)68 public Fragment instantiate(FragmentHostCallback host, FragmentContainer container, 69 Fragment parent, FragmentManagerNonConfig childNonConfig) { 70 if (mInstance == null) { 71 final Context context = host.getContext(); 72 if (mArguments != null) { 73 mArguments.setClassLoader(context.getClassLoader()); 74 } 75 76 if (container != null) { 77 mInstance = container.instantiate(context, mClassName, mArguments); 78 } else { 79 mInstance = Fragment.instantiate(context, mClassName, mArguments); 80 } 81 82 if (mSavedFragmentState != null) { 83 mSavedFragmentState.setClassLoader(context.getClassLoader()); 84 mInstance.mSavedFragmentState = mSavedFragmentState; 85 } 86 mInstance.setIndex(mIndex, parent); 87 mInstance.mFromLayout = mFromLayout; 88 mInstance.mRestored = true; 89 mInstance.mFragmentId = mFragmentId; 90 mInstance.mContainerId = mContainerId; 91 mInstance.mTag = mTag; 92 mInstance.mRetainInstance = mRetainInstance; 93 mInstance.mDetached = mDetached; 94 mInstance.mHidden = mHidden; 95 mInstance.mFragmentManager = host.mFragmentManager; 96 97 if (FragmentManagerImpl.DEBUG) { 98 Log.v(FragmentManagerImpl.TAG, "Instantiated fragment " + mInstance); 99 } 100 } 101 mInstance.mChildNonConfig = childNonConfig; 102 return mInstance; 103 } 104 105 @Override describeContents()106 public int describeContents() { 107 return 0; 108 } 109 110 @Override writeToParcel(Parcel dest, int flags)111 public void writeToParcel(Parcel dest, int flags) { 112 dest.writeString(mClassName); 113 dest.writeInt(mIndex); 114 dest.writeInt(mFromLayout ? 1 : 0); 115 dest.writeInt(mFragmentId); 116 dest.writeInt(mContainerId); 117 dest.writeString(mTag); 118 dest.writeInt(mRetainInstance ? 1 : 0); 119 dest.writeInt(mDetached ? 1 : 0); 120 dest.writeBundle(mArguments); 121 dest.writeInt(mHidden ? 1 : 0); 122 dest.writeBundle(mSavedFragmentState); 123 } 124 125 public static final @android.annotation.NonNull Parcelable.Creator<FragmentState> CREATOR = 126 new Parcelable.Creator<FragmentState>() { 127 @Override 128 public FragmentState createFromParcel(Parcel in) { 129 return new FragmentState(in); 130 } 131 132 @Override 133 public FragmentState[] newArray(int size) { 134 return new FragmentState[size]; 135 } 136 }; 137 }