專案需要實現GridView橫向迴圈自動滾動

1、先看佈局

<HorizontalScrollView
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:scrollbars="none"
            android:id="@+id/horizontalscrollview">

            <LinearLayout
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal" >

                <GridView
                    android:id="@+id/gridview_ad"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    android:horizontalSpacing="3dip"
                    android:listSelector="@color/white"
                    android:numColumns="6"
                    android:padding="5dip"
                    android:scrollbars="none"
                    android:verticalSpacing="5dip" />
            </LinearLayout>
        </HorizontalScrollView>
 

看怎麼迴圈自動

	Handler Timerhandler = new Handler();
	Runnable runnable = new Runnable() {
		@Override
		public void run() {
			int off = horizontalscrollview.getScrollX()
					- horizontalscrollview.getMeasuredWidth(); // 計算移動量
			if (off <= 0) {
				horizontalscrollview.smoothScrollTo(
						horizontalscrollview.getMeasuredWidth() * 2, 0);
			} else {
				horizontalscrollview.smoothScrollTo(0, 0);
			}
			Timerhandler.postDelayed(this, 5000);

		}

	};
 

horizontalscrollview.smoothScrollTo(0, 0);