How to check if scroll view is scroll to bottom android studio

Question

I have Scrollview cover many element inside. And I want to check if scrollview is scroll to the bottom of scrool. How to implement that. please any one recomment me. Thanks.

<ScrollView
    android:id="@+id/scrollview"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true" >

        <LinearLayout
            android:id="@+id/layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:showDividers="end|middle" >
                <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="
                 text.......
               " />
               <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="
                  text.......
              " />
        </LinearLayout>
    </ScrollView>

Answer 1

Create a custom scrollview as follow:

public class CustomScrollView extends ScrollView { OnBottomReachedListener mListener;

    public CustomScrollView(Context context, AttributeSet attrs,
                        int defStyle) {
    super(context, attrs, defStyle);
    }

    public CustomScrollView(Context context, AttributeSet attrs) {
    super(context, attrs);
    }

    public CustomScrollView(Context context) {
    super(context);
    }

    @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
    View view = getChildAt(getChildCount() - 1);
    int diff = (view.getBottom() - (getHeight() + getScrollY())) -  view.getPaddingBottom();

    if (diff <= 0 && mListener != null) {
        mListener.onBottomReached();
    }

    super.onScrollChanged(l, t, oldl, oldt);
    }

    // Getters & Setters

    public OnBottomReachedListener getOnBottomReachedListener() {
    return mListener;
    }

    public void setOnBottomReachedListener(
        OnBottomReachedListener onBottomReachedListener) {
    mListener = onBottomReachedListener;
    }

    //Event listener.

    public interface OnBottomReachedListener {
    public void onBottomReached();
    }
}

In your main activity:

CustomScrollView scrollView = (CustomScrollView) findViewById(R.id.scrollView);

scrollView.setOnBottomReachedListener(new CustomScrollView.OnBottomReachedListener() {

        @Override
        public void onBottomReached() {
            // ScrollView Reached bottom
        }
    });

In your xml file:

    <CustomScrollView 
        android:id="@+id/scrollView" 
        android:layout_width="match_parent" 
        android:layout_height="wrap_content" >

    </CustomScrollView>