Hinting RemoteViewsAdapter as to which views are visible (b967392e) · Commits · e / os / android_frameworks_base

core/java/android/widget/AbsListView.java

+10 −0

Original line number	Diff line number	Diff line
		@@ -5571,6 +5571,16 @@ public abstract class AbsListView extends AdapterView<ListAdapter> implements Te
		// items from the Adapter.
		}

		/**
		* Hints the RemoteViewsAdapter, if it exists, about which views are currently
		* being displayed by the AbsListView.
		*/
		void setVisibleRangeHint(int start, int end) {
		if (mRemoteAdapter != null) {
		mRemoteAdapter.setVisibleRangeHint(start, end);
		}
		}

		/**
		* Sets the recycler listener to be notified whenever a View is set aside in
		* the recycler for later reuse. This listener can be used to free resources

core/java/android/widget/AdapterViewAnimator.java

+3 −0

Original line number	Diff line number	Diff line
		@@ -555,6 +555,9 @@ public abstract class AdapterViewAnimator extends AdapterView<Adapter>
		mCurrentWindowStart = newWindowStart;
		mCurrentWindowEnd = newWindowEnd;
		mCurrentWindowStartUnbounded = newWindowStartUnbounded;
		if (mRemoteViewsAdapter != null) {
		mRemoteViewsAdapter.setVisibleRangeHint(mCurrentWindowStart, mCurrentWindowEnd);
		}
		}
		requestLayout();
		invalidate();

core/java/android/widget/GridView.java

+2 −0

Original line number	Diff line number	Diff line
		@@ -290,6 +290,7 @@ public class GridView extends AbsListView {
		pos += mNumColumns;
		}

		setVisibleRangeHint(mFirstPosition, mFirstPosition + getChildCount() - 1);
		return selectedView;
		}

		@@ -382,6 +383,7 @@ public class GridView extends AbsListView {
		mFirstPosition = Math.max(0, pos + 1);
		}

		setVisibleRangeHint(mFirstPosition, mFirstPosition + getChildCount() - 1);
		return selectedView;
		}

core/java/android/widget/ListView.java

+2 −1

Original line number	Diff line number	Diff line
		@@ -678,6 +678,7 @@ public class ListView extends AbsListView {
		pos++;
		}

		setVisibleRangeHint(mFirstPosition, mFirstPosition + getChildCount() - 1);
		return selectedView;
		}

		@@ -711,7 +712,7 @@ public class ListView extends AbsListView {
		}

		mFirstPosition = pos + 1;

		setVisibleRangeHint(mFirstPosition, mFirstPosition + getChildCount() - 1);
		return selectedView;
		}

core/java/android/widget/RemoteViewsAdapter.java

+30 −9

Original line number	Diff line number	Diff line
		@@ -68,6 +68,8 @@ public class RemoteViewsAdapter extends BaseAdapter implements Handler.Callback
		private RemoteViewsAdapterServiceConnection mServiceConnection;
		private WeakReference<RemoteAdapterConnectionCallback> mCallback;
		private FixedSizeRemoteViewsCache mCache;
		private int mVisibleWindowLowerBound;
		private int mVisibleWindowUpperBound;

		// A flag to determine whether we should notify data set changed after we connect
		private boolean mNotifyDataSetChangedAfterOnServiceConnected = false;
		@@ -765,7 +767,7 @@ public class RemoteViewsAdapter extends BaseAdapter implements Handler.Callback
		}
		if (position > -1) {
		// Load the item, and notify any existing RemoteViewsFrameLayouts
		updateRemoteViews(position, isRequested);
		updateRemoteViews(position, isRequested, true);

		// Queue up for the next one to load
		loadNextIndexInBackground();
		@@ -827,8 +829,8 @@ public class RemoteViewsAdapter extends BaseAdapter implements Handler.Callback
		}
		}

		private void updateRemoteViews(final int position, boolean isRequested) {
		if (!mServiceConnection.isConnected()) return;
		private void updateRemoteViews(final int position, boolean isRequested, boolean
		notifyWhenLoaded) {
		IRemoteViewsFactory factory = mServiceConnection.getRemoteViewsFactory();

		// Load the item information from the remote service
		@@ -864,6 +866,7 @@ public class RemoteViewsAdapter extends BaseAdapter implements Handler.Callback
		// there is new data for it.
		final RemoteViews rv = remoteViews;
		final int typeId = mCache.getMetaDataAt(position).typeId;
		if (notifyWhenLoaded) {
		mMainQueue.post(new Runnable() {
		@Override
		public void run() {
		@@ -872,6 +875,7 @@ public class RemoteViewsAdapter extends BaseAdapter implements Handler.Callback
		});
		}
		}
		}

		public Intent getRemoteViewsServiceIntent() {
		return mIntent;
		@@ -929,6 +933,16 @@ public class RemoteViewsAdapter extends BaseAdapter implements Handler.Callback
		return typeId;
		}

		/**
		* This method allows an AdapterView using this Adapter to provide information about which
		* views are currently being displayed. This allows for certain optimizations and preloading
		* which wouldn't otherwise be possible.
		*/
		public void setVisibleRangeHint(int lowerBound, int upperBound) {
		mVisibleWindowLowerBound = lowerBound;
		mVisibleWindowUpperBound = upperBound;
		}

		public View getView(int position, View convertView, ViewGroup parent) {
		// "Request" an index so that we can queue it for loading, initiate subsequent
		// preloading, etc.
		@@ -1059,6 +1073,13 @@ public class RemoteViewsAdapter extends BaseAdapter implements Handler.Callback
		// Re-request the new metadata (only after the notification to the factory)
		updateTemporaryMetaData();

		// Pre-load (our best guess of) the views which are currently visible in the AdapterView.
		// This mitigates flashing and flickering of loading views when a widget notifies that
		// its data has changed.
		for (int i = mVisibleWindowLowerBound; i <= mVisibleWindowUpperBound; i++) {
		updateRemoteViews(i, false, false);
		}

		// Propagate the notification back to the base adapter
		mMainQueue.post(new Runnable() {
		@Override