Stop ScrollView from auto-scrolling to an EditText

Question

Seems to be a common problem without a great solution that I have found. Goal is to stop a ScrollView from auto-scrolling to an EditText (or any vi

Answer 1

thomas88wp answer, https://stackoverflow.com/a/6486348/528746 worked for me. But I had two problems: 1. When scrolling, I wanted to hide the keyboard
2. I had lots of EditText views and didn't want to write it for each one of them
(I do getActivity() since I'm writing this inside a Fragment and not an activity)

    ScrollView scroll = (ScrollView)view.findViewById(R.id.layout_scroll);
    scroll.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            // Check if the view with focus is EditText
            if (getActivity().getCurrentFocus() instanceof EditText)
            {
                EditText ed = (EditText)getActivity().getCurrentFocus();
                if (ed.hasFocus()) {

                    // Hide the keyboard
                    InputMethodManager inputManager = (InputMethodManager)
                            getActivity().getSystemService(Context.INPUT_METHOD_SERVICE); 
                    inputManager.hideSoftInputFromWindow(getActivity().getCurrentFocus().getWindowToken(),
                            InputMethodManager.HIDE_NOT_ALWAYS);
                    // Clear the focus
                    ed.clearFocus();
                }
            }
            return false;
        }

    });

Answer 2

Just create an empty view at the top of linearlayout

<View android:layout_width="fill_parent" android:id="@+id/focus_view" android:layout_height="0dp" android:focusable="true" android:focusableInTouchMode="true"><requestFocus/></View>

Single line solves the problem

Answer 3

I had the same problem. There's one trick that I'm using to deal with this problem:

public void onClick(View v) {
    button.requestFocusFromTouch(); //prevents from loosing focus and scrolling view down
    ....
}

Answer 4

Create a custom ScrollView (create a class and have it extend HorizontalScrollView) and make a getter setter for scrollable. Then override computeScrollDeltaToGetChildRectOnScreen.

How it works: Every time android has an edit text or something in focus that is off screen it calls method computeScrollDeltaToGetChildRectOnScreen to bring it into view. If you Override it and return 0 when it is disabled than it will not scroll...

So you will have A custom scroll view like this:

    public class TrackableHorizontalScrollView extends HorizontalScrollView {


    // true if we can scroll (not locked)
    // false if we cannot scroll (locked)
    private boolean mScrollable = true;

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

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

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

    public void setScrollingEnabled(boolean enabled) {
        mScrollable = enabled;
    }

    public boolean isScrollable() {
        return mScrollable;
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                // if we can scroll pass the event to the superclass
                if (mScrollable) return super.onTouchEvent(ev);
                // only continue to handle the touch event if scrolling enabled
                return mScrollable; // mScrollable is always false at this point
            default:
                return super.onTouchEvent(ev);
        }
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        // Don't do anything with intercepted touch events if
        // we are not scrollable
        if (!mScrollable) return false;
        else return super.onInterceptTouchEvent(ev);
    }

    @Override
    public void scrollTo(int x, int y){
        if (!mScrollable) return;
        super.scrollTo(x, y);
    }


    //Custom smooth scroll method since norm is final and cannot be overridden
    public final void smooothScrollToIfEnabled(int x, int y){
         if (!mScrollable) return;
         smoothScrollTo(x, y);
    }

    @Override
    protected int computeScrollDeltaToGetChildRectOnScreen(android.graphics.Rect rect){
        if (!mScrollable) return 0;
        return super.computeScrollDeltaToGetChildRectOnScreen(rect);
    }


}

You can use this inside your XML like this:

<com.your.package.ui.widget.TrackableHorizontalScrollView
            android:id="@+id/wi_et_credit_scroller"
            android:layout_toRightOf="@id/wi_et_credit_iv"
            android:layout_width="fill_parent"
            android:scrollbars="none"
            android:layout_height="wrap_content"
            android:paddingRight="5dp"
            android:layout_gravity="center_vertical">

<!--Whatever you have inside the scrollview-->

</com.your.package.ui.widget.TrackableHorizontalScrollView>

Answer 5

The best Solution is to add focus options for the child of your scrollview :

android:descendantFocusability="beforeDescendants"
android:focusable="true"
android:focusableInTouchMode="true"

Then your xml file will look like :

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/scrollView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginRight="50dp"
        android:descendantFocusability="beforeDescendants"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:orientation="vertical" >

        <EditText
            android:id="@+id/editText_one"
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="TestApp 1" />

        <EditText
            android:id="@+id/editText_two"
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="TestApp 2" />

       <EditText
            android:id="@+id/editText_three"
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:text="TestApp 3" />


    </LinearLayout>

</ScrollView>

Answer 6

I often has this problem when my apps handle orientation change.

In that case I use the following kind of code:

@Override
protected void onCreate(Bundle savedInstanceState) {
    ...
    // to avoid the scrollview to scroll to this element automatically
    mEditTextSearch.setFocusable(false);
    // Get the saved scroll position
    final int scrolly = savedInstanceState.getInt("scrolly");
    mScrollView.post(new Runnable() {
        @Override
        public void run() {
            mScrollView.scrollTo(0, scrolly);
            // Restore the initial state of the EditText
            mEditTextSearch.setFocusable(true);
            mEditTextSearch.setFocusableInTouchMode(true);
            mEditTextSearch.setClickable(true);
        }
    });
    ...
}