diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecoration.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecoration.java
index 733f6b7d5dbf7..9a9dca05eb335 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecoration.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/CaptionWindowDecoration.java
@@ -28,6 +28,7 @@ import android.os.Handler;
 import android.view.Choreographer;
 import android.view.SurfaceControl;
 import android.view.View;
+import android.view.ViewConfiguration;
 import android.window.WindowContainerTransaction;
 
 import com.android.wm.shell.R;
@@ -55,6 +56,7 @@ public class CaptionWindowDecoration extends WindowDecoration<WindowDecorLinearL
     // Height of button (32dp)  + 2 * margin (5dp each)
     private static final int DECOR_CAPTION_HEIGHT_IN_DIP = 42;
     private static final int RESIZE_HANDLE_IN_DIP = 30;
+    private static final int RESIZE_CORNER_IN_DIP = 44;
 
     private static final Rect EMPTY_OUTSET = new Rect();
     private static final Rect RESIZE_HANDLE_OUTSET = new Rect(
@@ -145,16 +147,19 @@ public class CaptionWindowDecoration extends WindowDecoration<WindowDecorLinearL
         if (oldDecorationSurface != mDecorationContainerSurface || mDragResizeListener == null) {
             closeDragResizeListener();
             mDragResizeListener = new DragResizeInputListener(
-                    mContext,
-                    mHandler,
-                    mChoreographer,
-                    mDisplay.getDisplayId(),
-                    mDecorationContainerSurface,
-                    mDragResizeCallback);
+                        mContext,
+                        mHandler,
+                        mChoreographer,
+                        mDisplay.getDisplayId(),
+                        mDecorationContainerSurface,
+                        mDragResizeCallback);
         }
 
+        int touchSlop = ViewConfiguration.get(mResult.mRootView.getContext()).getScaledTouchSlop();
+
         mDragResizeListener.setGeometry(
-                mResult.mWidth, mResult.mHeight, (int) (mResult.mDensity * RESIZE_HANDLE_IN_DIP));
+                mResult.mWidth, mResult.mHeight, (int) (mResult.mDensity * RESIZE_HANDLE_IN_DIP),
+                (int) (mResult.mDensity * RESIZE_CORNER_IN_DIP), touchSlop);
     }
 
     /**
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DragResizeInputListener.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DragResizeInputListener.java
index 3d014959a952a..b9f16b63de48c 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DragResizeInputListener.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/DragResizeInputListener.java
@@ -16,11 +16,13 @@
 
 package com.android.wm.shell.windowdecor;
 
+import static android.view.InputDevice.SOURCE_TOUCHSCREEN;
 import static android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_TRUSTED_OVERLAY;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION;
 
 import android.content.Context;
+import android.graphics.PointF;
 import android.graphics.Rect;
 import android.graphics.Region;
 import android.hardware.input.InputManager;
@@ -42,8 +44,11 @@ import com.android.internal.view.BaseIWindow;
 
 /**
  * An input event listener registered to InputDispatcher to receive input events on task edges and
- * convert them to drag resize requests.
+ * and corners. Converts them to drag resize requests.
+ * Task edges are for resizing with a mouse.
+ * Task corners are for resizing with touch input.
  */
+// TODO(b/251270585): investigate how to pass taps in corners to the tasks
 class DragResizeInputListener implements AutoCloseable {
     private static final String TAG = "DragResizeInputListener";
 
@@ -63,8 +68,15 @@ class DragResizeInputListener implements AutoCloseable {
     private int mWidth;
     private int mHeight;
     private int mResizeHandleThickness;
+    private int mCornerSize;
+
+    private Rect mLeftTopCornerBounds;
+    private Rect mRightTopCornerBounds;
+    private Rect mLeftBottomCornerBounds;
+    private Rect mRightBottomCornerBounds;
 
     private int mDragPointerId = -1;
+    private int mTouchSlop;
 
     DragResizeInputListener(
             Context context,
@@ -118,16 +130,23 @@ class DragResizeInputListener implements AutoCloseable {
      * @param height The height of the drag resize handler in pixels, including resize handle
      *               thickness. That is task height + 2 * resize handle thickness.
      * @param resizeHandleThickness The thickness of the resize handle in pixels.
+     * @param cornerSize The size of the resize handle centered in each corner.
+     * @param touchSlop The distance in pixels user has to drag with touch for it to register as
+     *                  a resize action.
      */
-    void setGeometry(int width, int height, int resizeHandleThickness) {
+    void setGeometry(int width, int height, int resizeHandleThickness, int cornerSize,
+            int touchSlop) {
         if (mWidth == width && mHeight == height
-                && mResizeHandleThickness == resizeHandleThickness) {
+                && mResizeHandleThickness == resizeHandleThickness
+                && mCornerSize == cornerSize) {
             return;
         }
 
         mWidth = width;
         mHeight = height;
         mResizeHandleThickness = resizeHandleThickness;
+        mCornerSize = cornerSize;
+        mTouchSlop = touchSlop;
 
         Region touchRegion = new Region();
         final Rect topInputBounds = new Rect(0, 0, mWidth, mResizeHandleThickness);
@@ -146,6 +165,40 @@ class DragResizeInputListener implements AutoCloseable {
                 mWidth, mHeight);
         touchRegion.union(bottomInputBounds);
 
+        // Set up touch areas in each corner.
+        int cornerRadius = mCornerSize / 2;
+        mLeftTopCornerBounds = new Rect(
+                mResizeHandleThickness - cornerRadius,
+                mResizeHandleThickness - cornerRadius,
+                mResizeHandleThickness + cornerRadius,
+                mResizeHandleThickness + cornerRadius
+        );
+        touchRegion.union(mLeftTopCornerBounds);
+
+        mRightTopCornerBounds = new Rect(
+                mWidth - mResizeHandleThickness - cornerRadius,
+                mResizeHandleThickness - cornerRadius,
+                mWidth - mResizeHandleThickness + cornerRadius,
+                mResizeHandleThickness + cornerRadius
+        );
+        touchRegion.union(mRightTopCornerBounds);
+
+        mLeftBottomCornerBounds = new Rect(
+                mResizeHandleThickness - cornerRadius,
+                mHeight - mResizeHandleThickness - cornerRadius,
+                mResizeHandleThickness + cornerRadius,
+                mHeight - mResizeHandleThickness + cornerRadius
+        );
+        touchRegion.union(mLeftBottomCornerBounds);
+
+        mRightBottomCornerBounds = new Rect(
+                mWidth - mResizeHandleThickness - cornerRadius,
+                mHeight - mResizeHandleThickness - cornerRadius,
+                mWidth - mResizeHandleThickness + cornerRadius,
+                mHeight - mResizeHandleThickness + cornerRadius
+        );
+        touchRegion.union(mRightBottomCornerBounds);
+
         try {
             mWindowSession.updateInputChannel(
                     mInputChannel.getToken(),
@@ -173,6 +226,9 @@ class DragResizeInputListener implements AutoCloseable {
         private final Choreographer mChoreographer;
         private final Runnable mConsumeBatchEventRunnable;
         private boolean mConsumeBatchEventScheduled;
+        private boolean mShouldHandleEvents;
+        private boolean mDragging;
+        private final PointF mActionDownPoint = new PointF();
 
         private TaskResizeInputEventReceiver(
                 InputChannel inputChannel, Handler handler, Choreographer choreographer) {
@@ -216,41 +272,101 @@ class DragResizeInputListener implements AutoCloseable {
             }
 
             MotionEvent e = (MotionEvent) inputEvent;
+            boolean result = false;
+            // Check if this is a touch event vs mouse event.
+            // Touch events are tracked in four corners. Other events are tracked in resize edges.
+            boolean isTouch = (e.getSource() & SOURCE_TOUCHSCREEN) == SOURCE_TOUCHSCREEN;
+
             switch (e.getActionMasked()) {
                 case MotionEvent.ACTION_DOWN: {
-                    mDragPointerId = e.getPointerId(0);
-                    mCallback.onDragResizeStart(
-                            calculateCtrlType(e.getX(0), e.getY(0)), e.getRawX(0), e.getRawY(0));
+                    float x = e.getX(0);
+                    float y = e.getY(0);
+                    if (isTouch) {
+                        mShouldHandleEvents = isInCornerBounds(x, y);
+                    } else {
+                        mShouldHandleEvents = isInResizeHandleBounds(x, y);
+                    }
+                    if (mShouldHandleEvents) {
+                        mDragPointerId = e.getPointerId(0);
+                        float rawX = e.getRawX(0);
+                        float rawY = e.getRawY(0);
+                        mActionDownPoint.set(rawX, rawY);
+                        int ctrlType = calculateCtrlType(isTouch, x, y);
+                        mCallback.onDragResizeStart(ctrlType, rawX, rawY);
+                        result = true;
+                    }
                     break;
                 }
                 case MotionEvent.ACTION_MOVE: {
+                    if (!mShouldHandleEvents) {
+                        break;
+                    }
                     int dragPointerIndex = e.findPointerIndex(mDragPointerId);
-                    mCallback.onDragResizeMove(
-                            e.getRawX(dragPointerIndex), e.getRawY(dragPointerIndex));
+                    float rawX = e.getRawX(dragPointerIndex);
+                    float rawY = e.getRawY(dragPointerIndex);
+                    if (isTouch) {
+                        // Check for touch slop for touch events
+                        float dx = rawX - mActionDownPoint.x;
+                        float dy = rawY - mActionDownPoint.y;
+                        if (!mDragging && Math.hypot(dx, dy) > mTouchSlop) {
+                            mDragging = true;
+                        }
+                    } else {
+                        // For all other types allow immediate dragging.
+                        mDragging = true;
+                    }
+                    if (mDragging) {
+                        mCallback.onDragResizeMove(rawX, rawY);
+                        result = true;
+                    }
                     break;
                 }
                 case MotionEvent.ACTION_UP:
                 case MotionEvent.ACTION_CANCEL: {
-                    int dragPointerIndex = e.findPointerIndex(mDragPointerId);
-                    mCallback.onDragResizeEnd(
-                            e.getRawX(dragPointerIndex), e.getRawY(dragPointerIndex));
+                    if (mDragging) {
+                        int dragPointerIndex = e.findPointerIndex(mDragPointerId);
+                        mCallback.onDragResizeEnd(
+                                e.getRawX(dragPointerIndex), e.getRawY(dragPointerIndex));
+                    }
+                    mDragging = false;
+                    mShouldHandleEvents = false;
+                    mActionDownPoint.set(0, 0);
                     mDragPointerId = -1;
+                    result = true;
                     break;
                 }
                 case MotionEvent.ACTION_HOVER_ENTER:
                 case MotionEvent.ACTION_HOVER_MOVE: {
                     updateCursorType(e.getXCursorPosition(), e.getYCursorPosition());
+                    result = true;
                     break;
                 }
                 case MotionEvent.ACTION_HOVER_EXIT:
                     mInputManager.setPointerIconType(PointerIcon.TYPE_DEFAULT);
+                    result = true;
                     break;
             }
-            return true;
+            return result;
+        }
+
+        private boolean isInCornerBounds(float xf, float yf) {
+            return calculateCornersCtrlType(xf, yf) != 0;
+        }
+
+        private boolean isInResizeHandleBounds(float x, float y) {
+            return calculateResizeHandlesCtrlType(x, y) != 0;
         }
 
         @TaskPositioner.CtrlType
-        private int calculateCtrlType(float x, float y) {
+        private int calculateCtrlType(boolean isTouch, float x, float y) {
+            if (isTouch) {
+                return calculateCornersCtrlType(x, y);
+            }
+            return calculateResizeHandlesCtrlType(x, y);
+        }
+
+        @TaskPositioner.CtrlType
+        private int calculateResizeHandlesCtrlType(float x, float y) {
             int ctrlType = 0;
             if (x < mResizeHandleThickness) {
                 ctrlType |= TaskPositioner.CTRL_TYPE_LEFT;
@@ -267,8 +383,27 @@ class DragResizeInputListener implements AutoCloseable {
             return ctrlType;
         }
 
+        @TaskPositioner.CtrlType
+        private int calculateCornersCtrlType(float x, float y) {
+            int xi = (int) x;
+            int yi = (int) y;
+            if (mLeftTopCornerBounds.contains(xi, yi)) {
+                return TaskPositioner.CTRL_TYPE_LEFT | TaskPositioner.CTRL_TYPE_TOP;
+            }
+            if (mLeftBottomCornerBounds.contains(xi, yi)) {
+                return TaskPositioner.CTRL_TYPE_LEFT | TaskPositioner.CTRL_TYPE_BOTTOM;
+            }
+            if (mRightTopCornerBounds.contains(xi, yi)) {
+                return TaskPositioner.CTRL_TYPE_RIGHT | TaskPositioner.CTRL_TYPE_TOP;
+            }
+            if (mRightBottomCornerBounds.contains(xi, yi)) {
+                return TaskPositioner.CTRL_TYPE_RIGHT | TaskPositioner.CTRL_TYPE_BOTTOM;
+            }
+            return 0;
+        }
+
         private void updateCursorType(float x, float y) {
-            @TaskPositioner.CtrlType int ctrlType = calculateCtrlType(x, y);
+            @TaskPositioner.CtrlType int ctrlType = calculateResizeHandlesCtrlType(x, y);
 
             int cursorType = PointerIcon.TYPE_DEFAULT;
             switch (ctrlType) {
@@ -292,4 +427,4 @@ class DragResizeInputListener implements AutoCloseable {
             mInputManager.setPointerIconType(cursorType);
         }
     }
-}
+}
\ No newline at end of file
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/TaskPositioner.java b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/TaskPositioner.java
index 280569b05d870..27c10114ac0ec 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/TaskPositioner.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/windowdecor/TaskPositioner.java
@@ -25,9 +25,10 @@ import com.android.wm.shell.ShellTaskOrganizer;
 
 class TaskPositioner implements DragResizeCallback {
 
-    @IntDef({CTRL_TYPE_LEFT, CTRL_TYPE_RIGHT, CTRL_TYPE_TOP, CTRL_TYPE_BOTTOM})
+    @IntDef({CTRL_TYPE_UNDEFINED, CTRL_TYPE_LEFT, CTRL_TYPE_RIGHT, CTRL_TYPE_TOP, CTRL_TYPE_BOTTOM})
     @interface CtrlType {}
 
+    static final int CTRL_TYPE_UNDEFINED = 0;
     static final int CTRL_TYPE_LEFT = 1;
     static final int CTRL_TYPE_RIGHT = 2;
     static final int CTRL_TYPE_TOP = 4;