ScrollView 设置滚动是否可用

extends：http://stackoverflow.com/questions/5763304/disable-scrollview-programmatically , http://stackoverflow.com/questions/18893198/how-to-disable-and-enable-the-scrolling-on-android-scrollview

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

public class LockableScrollView extends ScrollView {

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

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

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

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

    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);
    }

}

// "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