我創建了我自己的類,它擴展了ScrollView,但滾動條消失了。當我滾動頁面時如何顯示滾動條。這是我的代碼類:ScrollView和丟失滾動條
package se.nindev.restaurant.views;
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ScrollView;
public class ScrollViewer extends ScrollView {
private float mLastX;
private float mLastY;
private float mDiffX;
private float mDiffY;
public ScrollViewer(Context context) {
this(context, null);
}
public ScrollViewer(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public ScrollViewer(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
// @Override
// public boolean dispatchTouchEvent(MotionEvent ev){
// return super.dispatchTouchEvent(ev);
// }
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
// reset difference values
mDiffX = 0;
mDiffY = 0;
mLastX = ev.getX();
mLastY = ev.getY();
break;
case MotionEvent.ACTION_MOVE:
final float curX = ev.getX();
final float curY = ev.getY();
mDiffX += Math.abs(curX - mLastX);
mDiffY += Math.abs(curY - mLastY);
mLastX = curX;
mLastY = curY;
// don't intercept event, when user tries to scroll horizontally
if (mDiffX > mDiffY) {
return false;
}
}
return super.onInterceptTouchEvent(ev);
}
}
更比別人當我在頁面滾動型中間滾動元件disaper喜歡在頁面的頂端底部GRAFIC的影響,但在我的課我沒有說效果。我如何將正常滾動視圖中的所有效果添加到我的課程中?
編輯:好,我添加滾動條:android:scrollbars="vertical"
,但仍然不知道如何添加此GRAFIC效果
竇已一個佈局xml文件?你可以發佈嗎? – Christine