/* * Copyright (C) 2011 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 android.support.v4.app; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.graphics.Matrix; import android.graphics.RectF; import android.os.Build; import android.os.Bundle; import android.os.Parcelable; import android.support.annotation.Nullable; import android.support.v4.content.ContextCompat; import android.view.View; import java.util.List; import java.util.Map; /** * Helper for accessing features in {@link android.app.Activity} * introduced after API level 4 in a backwards compatible fashion. */ public class ActivityCompat extends ContextCompat { /** * Invalidate the activity's options menu, if able. * *

Before API level 11 (Android 3.0/Honeycomb) the lifecycle of the * options menu was controlled primarily by the user's operation of * the hardware menu key. When the user presses down on the menu key * for the first time the menu was created and prepared by calls * to {@link Activity#onCreateOptionsMenu(android.view.Menu)} and * {@link Activity#onPrepareOptionsMenu(android.view.Menu)} respectively. * Subsequent presses of the menu key kept the existing instance of the * Menu itself and called {@link Activity#onPrepareOptionsMenu(android.view.Menu)} * to give the activity an opportunity to contextually alter the menu * before the menu panel was shown.

* *

In Android 3.0+ the Action Bar forces the options menu to be built early * so that items chosen to show as actions may be displayed when the activity * first becomes visible. The Activity method invalidateOptionsMenu forces * the entire menu to be destroyed and recreated from * {@link Activity#onCreateOptionsMenu(android.view.Menu)}, offering a similar * though heavier-weight opportunity to change the menu's contents. Normally * this functionality is used to support a changing configuration of Fragments.

* *

Applications may use this support helper to signal a significant change in * activity state that should cause the options menu to be rebuilt. If the app * is running on an older platform version that does not support menu invalidation * the app will still receive {@link Activity#onPrepareOptionsMenu(android.view.Menu)} * the next time the user presses the menu key and this method will return false. * If this method returns true the options menu was successfully invalidated.

* * @param activity Invalidate the options menu of this activity * @return true if this operation was supported and it completed; false if it was not available. */ public static boolean invalidateOptionsMenu(Activity activity) { if (Build.VERSION.SDK_INT >= 11) { ActivityCompatHoneycomb.invalidateOptionsMenu(activity); return true; } return false; } /** * Start an activity with additional launch information, if able. * *

In Android 4.1+ additional options were introduced to allow for more * control on activity launch animations. Applications can use this method * along with {@link ActivityOptionsCompat} to use these animations when * available. When run on versions of the platform where this feature does * not exist the activity will be launched normally.

* * @param activity Context to launch activity from. * @param intent The description of the activity to start. * @param options Additional options for how the Activity should be started. * May be null if there are no options. See * {@link ActivityOptionsCompat} for how to build the Bundle * supplied here; there are no supported definitions for * building it manually. */ public static void startActivity(Activity activity, Intent intent, @Nullable Bundle options) { if (Build.VERSION.SDK_INT >= 16) { ActivityCompatJB.startActivity(activity, intent, options); } else { activity.startActivity(intent); } } /** * Start new activity with options, if able, for which you would like a * result when it finished. * *

In Android 4.1+ additional options were introduced to allow for more * control on activity launch animations. Applications can use this method * along with {@link ActivityOptionsCompat} to use these animations when * available. When run on versions of the platform where this feature does * not exist the activity will be launched normally.

* * @param activity Origin activity to launch from. * @param intent The description of the activity to start. * @param requestCode If >= 0, this code will be returned in * onActivityResult() when the activity exits. * @param options Additional options for how the Activity should be started. * May be null if there are no options. See * {@link ActivityOptionsCompat} for how to build the Bundle * supplied here; there are no supported definitions for * building it manually. */ public static void startActivityForResult(Activity activity, Intent intent, int requestCode, @Nullable Bundle options) { if (Build.VERSION.SDK_INT >= 16) { ActivityCompatJB.startActivityForResult(activity, intent, requestCode, options); } else { activity.startActivityForResult(intent, requestCode); } } /** * Finish this activity, and tries to finish all activities immediately below it * in the current task that have the same affinity. * *

On Android 4.1+ calling this method will call through to the native version of this * method. For other platforms {@link Activity#finish()} will be called instead.

*/ public static void finishAffinity(Activity activity) { if (Build.VERSION.SDK_INT >= 16) { ActivityCompatJB.finishAffinity(activity); } else { activity.finish(); } } /** * Reverses the Activity Scene entry Transition and triggers the calling Activity * to reverse its exit Transition. When the exit Transition completes, * {@link Activity#finish()} is called. If no entry Transition was used, finish() is called * immediately and the Activity exit Transition is run. * *

On Android 4.4 or lower, this method only finishes the Activity with no * special exit transition.

*/ public static void finishAfterTransition(Activity activity) { if (Build.VERSION.SDK_INT >= 21) { ActivityCompat21.finishAfterTransition(activity); } else { activity.finish(); } } /** * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, * android.view.View, String)} was used to start an Activity, callback * will be called to handle shared elements on the launched Activity. This requires * {@link android.view.Window#FEATURE_CONTENT_TRANSITIONS}. * * @param callback Used to manipulate shared element transitions on the launched Activity. */ public static void setEnterSharedElementCallback(Activity activity, SharedElementCallback callback) { if (Build.VERSION.SDK_INT >= 21) { ActivityCompat21.setEnterSharedElementCallback(activity, createCallback(callback)); } } /** * When {@link android.app.ActivityOptions#makeSceneTransitionAnimation(Activity, * android.view.View, String)} was used to start an Activity, callback * will be called to handle shared elements on the launching Activity. Most * calls will only come when returning from the started Activity. * This requires {@link android.view.Window#FEATURE_CONTENT_TRANSITIONS}. * * @param callback Used to manipulate shared element transitions on the launching Activity. */ public static void setExitSharedElementCallback(Activity activity, SharedElementCallback callback) { if (Build.VERSION.SDK_INT >= 21) { ActivityCompat21.setExitSharedElementCallback(activity, createCallback(callback)); } } public static void postponeEnterTransition(Activity activity) { if (Build.VERSION.SDK_INT >= 21) { ActivityCompat21.postponeEnterTransition(activity); } } public static void startPostponedEnterTransition(Activity activity) { if (Build.VERSION.SDK_INT >= 21) { ActivityCompat21.startPostponedEnterTransition(activity); } } private static ActivityCompat21.SharedElementCallback21 createCallback( SharedElementCallback callback) { ActivityCompat21.SharedElementCallback21 newCallback = null; if (callback != null) { newCallback = new ActivityCompat.SharedElementCallback21Impl(callback); } return newCallback; } private static class SharedElementCallback21Impl extends ActivityCompat21.SharedElementCallback21 { private SharedElementCallback mCallback; public SharedElementCallback21Impl(SharedElementCallback callback) { mCallback = callback; } @Override public void onSharedElementStart(List sharedElementNames, List sharedElements, List sharedElementSnapshots) { mCallback.onSharedElementStart(sharedElementNames, sharedElements, sharedElementSnapshots); } @Override public void onSharedElementEnd(List sharedElementNames, List sharedElements, List sharedElementSnapshots) { mCallback.onSharedElementEnd(sharedElementNames, sharedElements, sharedElementSnapshots); } @Override public void onRejectSharedElements(List rejectedSharedElements) { mCallback.onRejectSharedElements(rejectedSharedElements); } @Override public void onMapSharedElements(List names, Map sharedElements) { mCallback.onMapSharedElements(names, sharedElements); } @Override public Parcelable onCaptureSharedElementSnapshot(View sharedElement, Matrix viewToGlobalMatrix, RectF screenBounds) { return mCallback.onCaptureSharedElementSnapshot(sharedElement, viewToGlobalMatrix, screenBounds); } @Override public View onCreateSnapshotView(Context context, Parcelable snapshot) { return mCallback.onCreateSnapshotView(context, snapshot); } } }