android – 在scrollView滚动时检测

问候

import android.content.Context;
import android.os.Handler;
import android.os.message;
import android.util.AttributeSet;
import android.util.Log;
import android.widget.ScrollView;

public class MyScrollView extends ScrollView {

    private static final int what = 1;

    class MyHandler extends Handler {
        @Override
        public void handlemessage(message msg) {
            super.handlemessage(msg);
            if(!hasmessages(what)) {
                Log.i("TestScroll","Last msg!. Position from " 
                                    + msg.arg1 + " to " + msg.arg2);                
            }
        }
    }

    private Handler mHandler = new MyHandler();

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

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

    public MyScrollView(Context context,AttributeSet attrs,int defStylE) {
        super(context,attrs,defStylE);
    }

    @Override
    protected void onScrollChanged(int l,int t,int oldl,int oldt) {
        super.onScrollChanged(l,t,oldl,oldt);
        final message msg = message.obtain();
        msg.arg1 = oldt;
        msg.arg2 = t;
        msg.what = what;
        mHandler.sendmessageDelayed(msg,500);
    }

}