Android Accessibility dispatch gesture not working

gistfile1.txt

@TargetApi(24)
    private void pressLocation(Point position){
        GestureDescription.Builder builder = new GestureDescription.Builder();
        Path p = new Path();
        p.lineTo(position.x, position.y);
        p.lineTo(position.x+10, position.y+10);
        builder.addStroke(new GestureDescription.StrokeDescription(p, 10L, 200L));
        GestureDescription gesture = builder.build();
        boolean isDispatched = dispatchGesture(gesture, new GestureResultCallback() {
            @Override
            public void onCompleted(GestureDescription gestureDescription) {
                super.onCompleted(gestureDescription);
            }

            @Override
            public void onCancelled(GestureDescription gestureDescription) {
                super.onCancelled(gestureDescription);
            }
        }, null);

        Toast.makeText(FingerprintService.this, "Was it dispatched? " + isDispatched, Toast.LENGTH_SHORT).show();
    }

hello，are u solve this problem？i hava same question