scrollview 实现滑动到底部再滑动加载数据的功能

思路：在滑动基础上添加scrollview到底检测事件

1.首先检测是否滑动

 

此段格式不知道怎么删除！
 

// 滑动加载
		scrollView.setOnTouchListener(new OnTouchListener() {

			@Override
			public boolean onTouch(View v, MotionEvent event) {
				// TODO Auto-generated method stub

				switch (event.getAction()) {
					case MotionEvent.ACTION_DOWN :

						break;
					case MotionEvent.ACTION_MOVE :
						//检查滑动事件
						 Log.d(TAG,"滑到底部");
						break;
					default :
						break;
				}
			}	
		});

 

2.对scrollview添加到底检测监听事件

 

但是scrollview 不能像listview那样添加onscrolllistener监听，所以需要自己检测

 

if (view.getMeasuredHeight() <= v.getScrollY() + v.getHeight()) {
        //到底部
        Log.d(TAG,"滑到底部");
}

 

 3.组合代码

 

// 滑动加载
scrollView.setOnTouchListener(new OnTouchListener() {

		@Override
		public boolean onTouch(View v, MotionEvent event) {
		// TODO Auto-generated method stub

			switch (event.getAction()) {
				case MotionEvent.ACTION_DOWN :

					break;
				case MotionEvent.ACTION_MOVE :
					View view = ((ScrollView) v).getChildAt(0);
					if (view.getMeasuredHeight() <= v.getScrollY() + v.getHeight()) {
						//加载数据代码
					}
						break;
				default :
						break;
				}
			}
		});

 4.测试的时候 发现这样会导致滑动多次触发，所以优化代码如下

 

private int index = 0;
// 滑动加载
		scrollView.setOnTouchListener(new OnTouchListener() {

			@Override
			public boolean onTouch(View v, MotionEvent event) {
				// TODO Auto-generated method stub

				switch (event.getAction()) {
					case MotionEvent.ACTION_DOWN :

						break;
					case MotionEvent.ACTION_MOVE :
						index++;
						break;
					default :
						break;
				}
				if (event.getAction() == MotionEvent.ACTION_UP &&  index > 0) {
					index = 0;
					View view = ((ScrollView) v).getChildAt(0);
					if (view.getMeasuredHeight() <= v.getScrollY() + v.getHeight()) {
						//加载数据代码
					}
				}
				return false;
			}
		});