| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package androidx.core.app; |
| |
| import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP; |
| |
| import android.app.Activity; |
| import android.os.Bundle; |
| |
| import androidx.annotation.CallSuper; |
| import androidx.annotation.Nullable; |
| import androidx.annotation.RestrictTo; |
| import androidx.collection.SimpleArrayMap; |
| import androidx.lifecycle.Lifecycle; |
| import androidx.lifecycle.LifecycleOwner; |
| import androidx.lifecycle.LifecycleRegistry; |
| import androidx.lifecycle.ReportFragment; |
| |
| /** |
| * Base class for activities that enables composition of higher level components. |
| * <p> |
| * Rather than all functionality being built directly into this class, only the minimal set of |
| * lower level building blocks are included. Higher level components can then be used as needed |
| * without enforcing a deep Activity class hierarchy or strong coupling between components. |
| * |
| * @hide |
| */ |
| @RestrictTo(LIBRARY_GROUP) |
| public class ComponentActivity extends Activity implements LifecycleOwner { |
| /** |
| * Storage for {@link ExtraData} instances. |
| * |
| * <p>Note that these objects are not retained across configuration changes</p> |
| */ |
| private SimpleArrayMap<Class<? extends ExtraData>, ExtraData> mExtraDataMap = |
| new SimpleArrayMap<>(); |
| |
| private LifecycleRegistry mLifecycleRegistry = new LifecycleRegistry(this); |
| |
| /** |
| * Store an instance of {@link ExtraData} for later retrieval by class name |
| * via {@link #getExtraData}. |
| * |
| * <p>Note that these objects are not retained across configuration changes</p> |
| * |
| * @see #getExtraData |
| * @hide |
| */ |
| @RestrictTo(LIBRARY_GROUP) |
| public void putExtraData(ExtraData extraData) { |
| mExtraDataMap.put(extraData.getClass(), extraData); |
| } |
| |
| @Override |
| @SuppressWarnings("RestrictedApi") |
| protected void onCreate(@Nullable Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| ReportFragment.injectIfNeededIn(this); |
| } |
| |
| @CallSuper |
| @Override |
| protected void onSaveInstanceState(Bundle outState) { |
| mLifecycleRegistry.markState(Lifecycle.State.CREATED); |
| super.onSaveInstanceState(outState); |
| } |
| |
| /** |
| * Retrieves a previously set {@link ExtraData} by class name. |
| * |
| * @see #putExtraData |
| * @hide |
| */ |
| @RestrictTo(LIBRARY_GROUP) |
| public <T extends ExtraData> T getExtraData(Class<T> extraDataClass) { |
| return (T) mExtraDataMap.get(extraDataClass); |
| } |
| |
| @Override |
| public Lifecycle getLifecycle() { |
| return mLifecycleRegistry; |
| } |
| |
| /** |
| * @hide |
| */ |
| @RestrictTo(LIBRARY_GROUP) |
| public static class ExtraData { |
| } |
| } |