NestedScrollview won't start from top

Solution 1:

I had the same problem, and I fixed it the following way.

Add android:descendantFocusability="blocksDescendants" to the Linear Layout which is the only child of the Nested Scroll View.

This allows the Nested Scroll View to start from the top with minimal change to code.

Solution 2:

It is a problem about focus. Try :

findViewById(R.id.recycler_view).setFocusable(false);
findViewById(R.id.temp).requestFocus();

<?xml version="1.0" encoding="utf-8"?>
    <android.support.v4.widget.NestedScrollView
    android:id="@+id/scrollView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/home_layout_background">

    <LinearLayout
        android:id="@+id/temp"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="horizontal">

            <com.daimajia.slider.library.SliderLayout
                android:id="@+id/image_slider"
                android:layout_width="match_parent"
                android:layout_height="@dimen/image_slider_height"
                android:layout_marginTop="@dimen/image_slider_top_margin" />
        </LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="@dimen/popular_fragment_side_padding"
            android:layout_marginRight="@dimen/popular_fragment_side_padding"
            android:layout_marginTop="@dimen/popular_fragment_side_padding"
            android:orientation="horizontal"
            android:weightSum="4">

            <RelativeLayout
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1">

                <RelativeLayout
                    android:id="@+id/free_delivery"
                    android:layout_width="76dp"
                    android:layout_height="76dp"
                    android:layout_centerInParent="true"
                    android:background="@color/white">

                    <RelativeLayout
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_centerInParent="true">

                        <ImageView
                            android:id="@+id/btnImageViewFreeDelivery"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_centerHorizontal="true"
                            android:background="@drawable/icon_free_delivery" />

                        <TextView
                            android:id="@+id/btnTextFreeDelivery"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_below="@+id/btnImageViewFreeDelivery"
                            android:layout_centerHorizontal="true"
                            android:layout_marginTop="2dp"
                            android:text="@string/free_delivery_txt"
                            android:textColor="@color/popular_fragment_four_btn_txt"
                            android:textSize="@dimen/popular_fragment_four_btn_txt_size" />
                    </RelativeLayout>

                </RelativeLayout>

            </RelativeLayout>

            <RelativeLayout
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1">

                <RelativeLayout
                    android:id="@+id/flash_deals"
                    android:layout_width="76dp"
                    android:layout_height="76dp"
                    android:layout_centerInParent="true"
                    android:background="@color/white">


                    <RelativeLayout
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_centerInParent="true">

                        <ImageView
                            android:id="@+id/btnImageViewFlashDeals"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_centerHorizontal="true"
                            android:background="@drawable/icon_flash_deals" />

                        <TextView
                            android:id="@+id/btnTextFlashDeals"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_below="@+id/btnImageViewFlashDeals"
                            android:layout_centerHorizontal="true"
                            android:layout_marginTop="2dp"
                            android:text="@string/flash_deals_txt"
                            android:textColor="@color/popular_fragment_four_btn_txt"
                            android:textSize="@dimen/popular_fragment_four_btn_txt_size" />
                    </RelativeLayout>

                </RelativeLayout>

            </RelativeLayout>

            <RelativeLayout
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1">

                <RelativeLayout
                    android:id="@+id/for_you"
                    android:layout_width="76dp"
                    android:layout_height="76dp"
                    android:layout_centerInParent="true"
                    android:background="@color/white">

                    <RelativeLayout
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_centerInParent="true">

                        <ImageView
                            android:id="@+id/btnImageViewForYou"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_centerHorizontal="true"
                            android:background="@drawable/icon_for_you" />

                        <TextView
                            android:id="@+id/btnTextForYou"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_below="@+id/btnImageViewForYou"
                            android:layout_centerHorizontal="true"
                            android:layout_marginTop="2dp"
                            android:text="@string/for_you_txt"
                            android:textColor="@color/popular_fragment_four_btn_txt"
                            android:textSize="@dimen/popular_fragment_four_btn_txt_size" />
                    </RelativeLayout>


                </RelativeLayout>
            </RelativeLayout>

            <RelativeLayout
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1">

                <RelativeLayout
                    android:id="@+id/shake_deals"
                    android:layout_width="76dp"
                    android:layout_height="76dp"
                    android:layout_centerInParent="true"
                    android:background="@color/white">

                    <RelativeLayout
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_centerInParent="true">

                        <ImageView
                            android:id="@+id/btnImageViewShakeDeals"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_centerHorizontal="true"
                            android:background="@drawable/icon_shake_deals" />

                        <TextView
                            android:id="@+id/btnTextShakeDeals"
                            android:layout_width="wrap_content"
                            android:layout_height="wrap_content"
                            android:layout_below="@+id/btnImageViewShakeDeals"
                            android:layout_centerHorizontal="true"
                            android:layout_marginTop="2dp"
                            android:text="@string/shake_deals"
                            android:textColor="@color/popular_fragment_four_btn_txt"
                            android:textSize="@dimen/popular_fragment_four_btn_txt_size" />
                    </RelativeLayout>

                </RelativeLayout>
            </RelativeLayout>
        </LinearLayout>

        <android.support.v7.widget.RecyclerView
            android:id="@+id/recycler_view"
            android:focusable="false"
            android:focusableInTouchMode="false"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginLeft="@dimen/popular_fragment_side_padding"
            android:layout_marginRight="@dimen/popular_fragment_side_padding"
            android:layout_marginTop="18dp"
            android:scrollbars="none" />

    </LinearLayout>

    </android.support.v4.widget.NestedScrollView>

Solution 3:

Just add this line to child of NestedScrollView in xml:

android:focusableInTouchMode="true"

Solution 4:

<android.support.v4.widget.NestedScrollView
            android:id="@+id/nested_scrool_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:descendantFocusability="beforeDescendants"
            android:focusableInTouchMode="true"
            android:fitsSystemWindows="false"
            >

   </android.support.v4.widget.NestedScrollView>


NestedScrollView nested_scrool_view;
nested_scrool_view = mView.findViewById(R.id.nested_scrool_view);
nested_scrool_view.smoothScrollTo(0,0); //set it on top