android上拉下拉加载更多数据-CFANZ编程社区

效果图

下拉刷新：

android上拉下拉加载更多数据_android

加载更多：

android上拉下拉加载更多数据_java_02

CustomListView.java

[java] view plain copy

package
import
import
import
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/**
* ListView下拉刷新
*
*/
public class CustomListView extends ListView implements
private final static int RELEASE_To_REFRESH = 0;
private final static int PULL_To_REFRESH = 1;
private final static int REFRESHING = 2;
private final static int DONE = 3;
private final static int LOADING = 4;
// 实际的padding的距离与界面上偏移距离的比例
private final static int RATIO = 3;
private
private
private
private
private
private
private
private
// 用于保证startY的值在一个完整的touch事件中只被记录一次
private boolean
private int
private int
private int
private int
private int
private boolean
private
private
private boolean
private
private
private
public
super(context);
init(context);
}
public
super(context, attrs);
init(context);
}
private void
setCacheColorHint(context.getResources().getColor(R.color.transparent));
inflater = LayoutInflater.from(context);
null);
arrowImageView = (ImageView) headView.findViewById(R.id.head_arrowImageView);
70);
50);
progressBar = (ProgressBar) headView.findViewById(R.id.head_progressBar);
tipsTextview = (TextView) headView.findViewById(R.id.head_tipsTextView);
lastUpdatedTextView = (TextView) headView.findViewById(R.id.head_lastUpdatedTextView);
measureView(headView);
headContentHeight = headView.getMeasuredHeight();
headContentWidth = headView.getMeasuredWidth();
0, -1 * headContentHeight, 0, 0);
headView.invalidate();
"size", "width:" + headContentWidth + " height:"
null, false);
this);
new RotateAnimation(0, -180, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);
new
250);
true);
new RotateAnimation(-180, 0, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);
new
200);
true);
state = DONE;
false;
null);
moreView.setVisibility(View.VISIBLE);
moreProgressBar = (ProgressBar) moreView.findViewById(R.id.pull_to_refresh_progress);
loadMoreView = (TextView) moreView.findViewById(R.id.load_more);
new
@Override
public void
onLoad();
}
});
addFooterView(moreView);
}
public void onScroll(AbsListView arg0, int firstVisiableItem, int arg2, int
firstItemIndex = firstVisiableItem;
}
public void onScrollStateChanged(AbsListView arg0, int
}
public boolean
if
switch
case
if (firstItemIndex == 0
true;
int) event.getY();
}
break;
case
if
if
}
if
state = DONE;
changeHeaderViewByState();
}
if
state = REFRESHING;
changeHeaderViewByState();
onRefresh();
}
}
false;
false;
break;
case
int tempY = (int) event.getY();
if (!isRecored && firstItemIndex == 0) {
true;
startY = tempY;
}
if
// 保证在设置padding的过程中，当前的位置一直是在head，否则如果当列表超出屏幕的话，当在上推的时候，列表会同时进行滚动
// 可以松手去刷新了
if
0);
// 往上推了，推到了屏幕足够掩盖head的程度，但是还没有推到全部掩盖的地步
if (((tempY - startY) / RATIO < headContentHeight) && (tempY - startY) > 0) {
state = PULL_To_REFRESH;
changeHeaderViewByState();
}
// 一下子推到顶了
else if (tempY - startY <= 0) {
state = DONE;
changeHeaderViewByState();
}
// 往下拉了，或者还没有上推到屏幕顶部掩盖head的地步
}
// 还没有到达显示松开刷新的时候,DONE或者是PULL_To_REFRESH状态
if
0);
// 下拉到可以进入RELEASE_TO_REFRESH的状态
if
state = RELEASE_To_REFRESH;
true;
changeHeaderViewByState();
}
else if (tempY - startY <= 0) {
state = DONE;
changeHeaderViewByState();
}
}
if
if (tempY - startY > 0) {
state = PULL_To_REFRESH;
changeHeaderViewByState();
}
}
if
0, -1 * headContentHeight + (tempY - startY) / RATIO, 0, 0);
}
if
0, (tempY - startY) / RATIO - headContentHeight, 0, 0);
}
}
break;
}
}
return super.onTouchEvent(event);
}
// 当状态改变时候，调用该方法，以更新界面
private void
switch
case
arrowImageView.setVisibility(View.VISIBLE);
progressBar.setVisibility(View.GONE);
tipsTextview.setVisibility(View.VISIBLE);
lastUpdatedTextView.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.startAnimation(animation);
"松开刷新");
break;
case
progressBar.setVisibility(View.GONE);
tipsTextview.setVisibility(View.VISIBLE);
lastUpdatedTextView.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.VISIBLE);
// 是由RELEASE_To_REFRESH状态转变来的
if
false;
arrowImageView.clearAnimation();
arrowImageView.startAnimation(reverseAnimation);
"下拉刷新");
else
"下拉刷新");
}
break;
case
0, 0, 0, 0);
progressBar.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.GONE);
"正在刷新...");
lastUpdatedTextView.setVisibility(View.VISIBLE);
break;
case
0, -1 * headContentHeight, 0, 0);
progressBar.setVisibility(View.GONE);
arrowImageView.clearAnimation();
arrowImageView.setImageResource(R.drawable.arrow);
"下拉刷新");
lastUpdatedTextView.setVisibility(View.VISIBLE);
break;
}
}
public void
this.refreshListener = refreshListener;
true;
}
public void
this.loadListener = loadListener;
}
public interface
public void
}
public interface
public void
}
@SuppressWarnings("deprecation")
public void
state = DONE;
"最近更新:" + new
changeHeaderViewByState();
}
private void
if (loadListener != null) {
moreProgressBar.setVisibility(View.VISIBLE);
loadMoreView.setText(getContext().getString(R.string.load_more));
loadListener.onLoad();
}
}
public void
// moreView.setVisibility(View.GONE);
moreProgressBar.setVisibility(View.GONE);
loadMoreView.setText(getContext().getString(R.string.more_data));
}
private void
if (refreshListener != null) {
refreshListener.onRefresh();
}
}
private void
ViewGroup.LayoutParams p = child.getLayoutParams();
if (p == null) {
new
}
int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0, p.width);
int
int
if (lpHeight > 0) {
childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY);
else
0, MeasureSpec.UNSPECIFIED);
}
child.measure(childWidthSpec, childHeightSpec);
}
@SuppressWarnings("deprecation")
public void
"最近更新:" + new
super.setAdapter(adapter);
}
}

在 CustomListView 中有2个回调接口，OnRefreshListener 和 OnLoadListener ，分别对应下拉和点击加载更多时候的回调函数。在下拉刷新完成之后要调用 mListView.onRefreshComplete(); 来隐藏掉头部，调用 mListView.onLoadComplete(); 隐藏掉底部的加载view。

header.xml

[html] view plain copy