How to disable and enable the scrolling on android

问题:

This question already has an answer here:

• Disable ScrollView Programmatically? 16 answers

I am a android developer.I also want to use a ScrollView.This ScrollView need to some time disable scrolling and Some time enable scrolling .But i can no able to disable the scrolling .How to i implement it .Please help to me.I also try to use the some code such a s

fullparentscrolling.setHorizontalFadingEdgeEnabled(false);
fullparentscrolling.setVerticalFadingEdgeEnabled(false);

or

 fullparentscrolling.setEnabled(false);

But it does not work.

回答1:

Try this way

Create Your CustomScrollview like this

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ScrollView;

public class CustomScrollView extends ScrollView {

    private boolean enableScrolling = true;

    public boolean isEnableScrolling() {
        return enableScrolling;
    }

    public void setEnableScrolling(boolean enableScrolling) {
        this.enableScrolling = enableScrolling;
    }

    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
    public boolean onInterceptTouchEvent(MotionEvent ev) {

        if (isEnableScrolling()) {
            return super.onInterceptTouchEvent(ev);
        } else {
            return false;
        }
    }
    @Override
    public boolean onTouchEvent(MotionEvent ev) {
       if (isEnableScrolling()) {
            return super.onTouchEvent(ev);
       } else {
           return false;
       }
}
}

In your xml

// "com.example.demo" replace with your packagename

<com.example.demo.CustomScrollView
        android:id="@+id/myScroll"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </com.example.demo.CustomScrollView>

In your Activity

CustomScrollView myScrollView = (CustomScrollView) findViewById(R.id.myScroll);
        myScrollView.setEnableScrolling(false); // disable scrolling
        myScrollView.setEnableScrolling(true); // enable scrolling

回答2:

I set the on touch listener for the scroll view and in the onTouch method i returend true. That did the trick for me.

mScrollView.setOnTouchListener( new OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) 
            {
                  return true;
            }
});

Best for all

回答3:

You cannot disable the scrolling of a ScrollView. You would need to extend to ScrollView and override the onTouchEvent method to return false when some condition is matched.

You could modify ScrollView as follows to disable scrolling

class LockableScrollView extends ScrollView {

    ...

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

    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);
    }

}

for furthe reference here is the complete solution on stack overflow too! Disable ScrollView Programmatically?

mark this as answer for others help..thank you

回答4:

Try this, this will disable the scroll function.

scrollview.setEnabled(false);