Manage accessibility focus during PhoneWindow save and restore (ec6cf184) · Commits · e / os / android_frameworks_base

core/java/com/android/internal/policy/PhoneWindow.java

+59 −11

Original line number	Diff line number	Diff line
		@@ -115,6 +115,8 @@ import android.util.SparseArray;
		import android.util.TypedValue;
		import android.view.accessibility.AccessibilityEvent;
		import android.view.accessibility.AccessibilityManager;
		import android.view.accessibility.AccessibilityNodeInfo;
		import android.view.accessibility.AccessibilityNodeProvider;
		import android.view.animation.Animation;
		import android.view.animation.AnimationUtils;
		import android.view.animation.Interpolator;
		@@ -2000,6 +2002,9 @@ public class PhoneWindow extends Window implements MenuBuilder.Callback {
		}

		static private final String FOCUSED_ID_TAG = "android:focusedViewId";
		static private final String ACCESSIBILITY_FOCUSED_ID_TAG = "android:accessibilityFocusedViewId";
		static private final String ACCESSIBILITY_FOCUSED_VIRTUAL_ID_TAG =
		"android:accessibilityFocusedVirtualViewId";
		static private final String VIEWS_TAG = "android:views";
		static private final String PANELS_TAG = "android:Panels";
		static private final String ACTION_BAR_TAG = "android:ActionBar";
		@@ -2016,16 +2021,25 @@ public class PhoneWindow extends Window implements MenuBuilder.Callback {
		mContentParent.saveHierarchyState(states);
		outState.putSparseParcelableArray(VIEWS_TAG, states);

		// save the focused view id
		View focusedView = mContentParent.findFocus();
		if (focusedView != null) {
		if (focusedView.getId() != View.NO_ID) {
		// Save the focused view ID.
		final View focusedView = mContentParent.findFocus();
		if (focusedView != null && focusedView.getId() != View.NO_ID) {
		outState.putInt(FOCUSED_ID_TAG, focusedView.getId());
		} else {
		if (false) {
		Log.d(TAG, "couldn't save which view has focus because the focused view "
		+ focusedView + " has no id.");
		}

		// Save the accessibility focused view ID.
		final ViewRootImpl viewRootImpl = mContentParent.getViewRootImpl();
		final View accessFocusHost = viewRootImpl.getAccessibilityFocusedHost();
		if (accessFocusHost != null && accessFocusHost.getId() != View.NO_ID) {
		outState.putInt(ACCESSIBILITY_FOCUSED_ID_TAG, accessFocusHost.getId());

		// If we have a focused virtual node ID, save that too.
		final AccessibilityNodeInfo accessFocusedNode =
		viewRootImpl.getAccessibilityFocusedVirtualView();
		if (accessFocusedNode != null) {
		final int virtualNodeId = AccessibilityNodeInfo.getVirtualDescendantId(
		accessFocusedNode.getSourceNodeId());
		outState.putInt(ACCESSIBILITY_FOCUSED_VIRTUAL_ID_TAG, virtualNodeId);
		}
		}

		@@ -2071,7 +2085,14 @@ public class PhoneWindow extends Window implements MenuBuilder.Callback {
		}
		}

		// restore the panels
		// Restore the accessibility focused view.
		final int accessFocusHostViewId = savedInstanceState.getInt(
		ACCESSIBILITY_FOCUSED_ID_TAG, View.NO_ID);
		final int accessFocusVirtualViewId = savedInstanceState.getInt(
		ACCESSIBILITY_FOCUSED_VIRTUAL_ID_TAG, AccessibilityNodeInfo.UNDEFINED_ITEM_ID);
		tryRestoreAccessibilityFocus(accessFocusHostViewId, accessFocusVirtualViewId);

		// Restore the panels.
		SparseArray<Parcelable> panelStates = savedInstanceState.getSparseParcelableArray(PANELS_TAG);
		if (panelStates != null) {
		restorePanelState(panelStates);
		@@ -2090,6 +2111,33 @@ public class PhoneWindow extends Window implements MenuBuilder.Callback {
		}
		}

		private void tryRestoreAccessibilityFocus(int hostViewId, int virtualViewId) {
		if (hostViewId != View.NO_ID) {
		final View needsAccessFocus = mContentParent.findViewById(hostViewId);
		if (needsAccessFocus != null) {
		if (!tryFocusingVirtualView(needsAccessFocus, virtualViewId)
		&& !needsAccessFocus.requestAccessibilityFocus()) {
		Log.w(TAG, "Failed to restore focus to previously accessibility"
		+ " focused view with id " + hostViewId);
		}
		} else {
		Log.w(TAG, "Previously accessibility focused view reported id " + hostViewId
		+ " during save, but can't be found during restore.");
		}
		}
		}

		private boolean tryFocusingVirtualView(View host, int virtualViewId) {
		if (virtualViewId != AccessibilityNodeInfo.UNDEFINED_ITEM_ID) {
		final AccessibilityNodeProvider nodeProvider = host.getAccessibilityNodeProvider();
		if (nodeProvider != null) {
		return nodeProvider.performAction(virtualViewId,
		AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS, null);
		}
		}
		return false;
		}

		/**
		* Invoked when the panels should freeze their state.
		*