Merge "Fade to empty view when no tasks for Recents Go" into ub-launcher3-master (65b1cdbd) · Commits · e / os / BlissLauncher3

go/quickstep/res/layout/icon_recents_root_view.xml

+11 −1

Original line number	Diff line number	Diff line
		@@ -24,5 +24,15 @@
		android:id="@+id/recent_task_recycler_view"
		android:layout_width="match_parent"
		android:layout_height="match_parent"
		android:scrollbars="none"/>
		android:scrollbars="none"
		android:visibility="gone"/>
		<TextView
		android:id="@+id/recent_task_empty_view"
		android:layout_width="match_parent"
		android:layout_height="match_parent"
		android:gravity="center"
		android:text="@string/recents_empty_message"
		android:textColor="@android:color/white"
		android:textSize="25sp"
		android:visibility="gone"/>
		</com.android.quickstep.views.IconRecentsView>
		No newline at end of file

go/quickstep/src/com/android/quickstep/views/IconRecentsView.java

+59 −1

Original line number	Diff line number	Diff line
		@@ -17,15 +17,19 @@ package com.android.quickstep.views;

		import static androidx.recyclerview.widget.LinearLayoutManager.VERTICAL;

		import android.animation.Animator;
		import android.animation.AnimatorListenerAdapter;
		import android.content.Context;
		import android.util.AttributeSet;
		import android.util.FloatProperty;
		import android.view.View;
		import android.view.ViewDebug;
		import android.widget.FrameLayout;

		import androidx.recyclerview.widget.ItemTouchHelper;
		import androidx.recyclerview.widget.LinearLayoutManager;
		import androidx.recyclerview.widget.RecyclerView;
		import androidx.recyclerview.widget.RecyclerView.AdapterDataObserver;

		import com.android.launcher3.R;
		import com.android.quickstep.TaskAdapter;
		@@ -70,6 +74,7 @@ public final class IconRecentsView extends FrameLayout {
		return ALPHA.get(view);
		}
		};
		private static final long CROSSFADE_DURATION = 300;

		/**
		* A ratio representing the view's relative placement within its padded space. For example, 0
		@@ -84,7 +89,7 @@ public final class IconRecentsView extends FrameLayout {

		private float mTranslationYFactor;
		private RecyclerView mTaskRecyclerView;

		private View mEmptyView;

		public IconRecentsView(Context context, AttributeSet attrs) {
		super(context, attrs);
		@@ -106,6 +111,19 @@ public final class IconRecentsView extends FrameLayout {
		ItemTouchHelper helper = new ItemTouchHelper(
		new TaskSwipeCallback(mTaskInputController));
		helper.attachToRecyclerView(mTaskRecyclerView);

		mEmptyView = findViewById(R.id.recent_task_empty_view);
		mTaskAdapter.registerAdapterDataObserver(new AdapterDataObserver() {
		@Override
		public void onChanged() {
		updateContentViewVisibility();
		}

		@Override
		public void onItemRangeRemoved(int positionStart, int itemCount) {
		updateContentViewVisibility();
		}
		});
		}
		}

		@@ -133,4 +151,44 @@ public final class IconRecentsView extends FrameLayout {
		private float computeTranslationYForFactor(float translationYFactor) {
		return translationYFactor * (getPaddingBottom() - getPaddingTop());
		}

		/**
		* Update the content view so that the appropriate view is shown based off the current list
		* of tasks.
		*/
		private void updateContentViewVisibility() {
		int taskListSize = mTaskLoader.getCurrentTaskList().size();
		if (mEmptyView.getVisibility() != VISIBLE && taskListSize == 0) {
		crossfadeViews(mEmptyView, mTaskRecyclerView);
		// TODO: Go to home.
		}
		if (mTaskRecyclerView.getVisibility() != VISIBLE && taskListSize > 0) {
		crossfadeViews(mTaskRecyclerView, mEmptyView);
		}
		}

		/**
		* Animate views so that one view fades in while the other fades out.
		*
		* @param fadeInView view that should fade in
		* @param fadeOutView view that should fade out
		*/
		private void crossfadeViews(View fadeInView, View fadeOutView) {
		fadeInView.setVisibility(VISIBLE);
		fadeInView.setAlpha(0f);
		fadeInView.animate()
		.alpha(1f)
		.setDuration(CROSSFADE_DURATION)
		.setListener(null);

		fadeOutView.animate()
		.alpha(0f)
		.setDuration(CROSSFADE_DURATION)
		.setListener(new AnimatorListenerAdapter() {
		@Override
		public void onAnimationEnd(Animator animation) {
		fadeOutView.setVisibility(GONE);
		}
		});
		}
		}