I want to implement an activity that contains a vertical ScrollView that has several horizontal RecyceViews as children!
but sometimes I faced to a strange touch interrupts from inner RecycleViews, when I try to scroll in the vertical direction and my start point of touch is in inside of an item( of RecycleView) scrolling of ScrollView doesn't work correctly and it doesn't scroll in Y direction!
I try to implement my own ScrollView and RecycleView To handle touch actions but the problem still exists!
you can watch what really happens in this video: video of my applications problem
MyScrollView:
public class MyScrollView extends ScrollView {
private GestureDetector mGestureDetector;
public MyScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
mGestureDetector = new GestureDetector(context, new YScrollDetector());
setFadingEdgeLength(0);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
return super.onInterceptTouchEvent(ev) && mGestureDetector.onTouchEvent(ev);
}
@Override
public boolean canScrollVertically(int direction) {
return true;
}
@Override
public boolean canScrollHorizontally(int direction) {
return false;
}
// Return false if we're scrolling in the x direction
class YScrollDetector extends GestureDetector.SimpleOnGestureListener {
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
boolean result=Math.abs(distanceY) > Math.abs(distanceX);
Log.d("ADAPTER MYSCR G = ",result+"");
return result;
}
}
}
MyRecycleView:
public class MyRecycleView extends RecyclerView {
private GestureDetector mGestureDetector;
public MyRecycleView(Context context) {
super(context);
mGestureDetector = new GestureDetector(context, new MyRecycleView.XScrollDetector());
}
public MyRecycleView(Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
mGestureDetector = new GestureDetector(context, new MyRecycleView.XScrollDetector());
}
public MyRecycleView(Context context, @Nullable AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mGestureDetector = new GestureDetector(context, new MyRecycleView.XScrollDetector());
}
@Override
public boolean onInterceptTouchEvent(MotionEvent e) {
boolean result=super.onInterceptTouchEvent(e) && mGestureDetector.onTouchEvent(e);
if(!result) {
Log.d("ADAPTER MYREC G = ",result+"");
View parent=((View) getParent());
while (parent!=null){
if(parent.getClass().getName().equals("class com.android.internal.policy.DecorView"))
break;
if(parent instanceof MyScrollView) {
Log.d("MY SCROLL VIEW","FOUND AS PARENT!");
((MyScrollView) parent).requestDisallowInterceptTouchEvent(false);
break;
}
parent= (View) parent.getParent();
}
this.stopScroll();
}
return result;
}
@Override
public boolean canScrollHorizontally(int direction) {
return true;
}
@Override
public boolean canScrollVertically(int direction) {
return false;
}
// Return false if we're scrolling in the y direction
class XScrollDetector extends GestureDetector.SimpleOnGestureListener {
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
boolean result=Math.abs(distanceY) < Math.abs(distanceX);
return result;
}
}
}
and here is my RecycleView items adapter xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/lib/io.github.makbn.graphics"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_margin="2dp"
android:background="@android:color/transparent"
android:gravity="center"
android:orientation="vertical">
<android.support.v7.widget.CardView
android:id="@+id/graphics_card_container"
android:layout_width="115dp"
android:layout_height="180dp"
android:layout_marginBottom="3dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:layout_marginTop="1dp"
android:foreground="?android:attr/selectableItemBackground"
app:cardBackgroundColor="#fff"
android:clickable="true"
android:focusableInTouchMode="false"
android:filterTouchesWhenObscured="true"
android:focusable="false"
app:cardElevation="2dp"
app:cardPreventCornerOverlap="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">
<RelativeLayout
android:id="@+id/layout_foodview_container"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="@+id/graphics_img_icon"
android:layout_width="match_parent"
android:layout_height="80dp"
android:layout_gravity="center"
android:background="#00000000"
android:scaleType="centerCrop" />
<RatingBar
style="@style/MyRatingBar_Style"
android:id="@+id/rating"
android:layout_width="match_parent"
android:layout_height="20dp"
android:layout_alignBottom="@+id/graphics_img_icon"
android:layout_centerInParent="true"
android:layout_gravity="center_horizontal"
android:isIndicator="true"
android:background="@color/white_overlay"
android:numStars="5" />
</RelativeLayout>
<TextView
android:id="@+id/txt_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/img_logo"
android:layout_gravity="center"
android:layout_margin="3dp"
android:ellipsize="end"
android:gravity="center"
android:lines="2"
android:maxLines="2"
android:padding="2dp"
android:text="نام محصول"
android:textSize="12sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"></LinearLayout>
<TextView
android:id="@+id/txt_price"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:background="@color/colorAccent"
android:gravity="center_horizontal"
android:padding="3dp"
android:text="۷۵۰۰ ت"
android:textColor="#fff"
android:textSize="12sp" />
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
And in my activty I find my MyScrollView and create several instance of MyRecycleView and add to it!
