今天得需求是做listview+上下拉动在header和footer显示progressdialog，但不影响用户操作
直接上代码，我已经加上注释了，自己看。
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package?com.stay.main;
import?java.net.HttpURLConnection;
import?java.util.ArrayList;
import?java.util.HashMap;
import?org.json.JSONObject;
import?android.app.Activity;
import?android.app.ProgressDialog;
import?android.graphics.drawable.Drawable;
import?android.os.Bundle;
import?android.os.Handler;
import?android.os.HandlerThread;
import?android.os.Looper;
import?android.os.Message;
import?android.view.LayoutInflater;
import?android.view.View;
import?android.widget.AbsListView;
import?android.widget.AbsListView.OnScrollListener;
import?android.widget.Button;
import?android.widget.LinearLayout;
import?android.widget.ListView;
import?android.widget.RelativeLayout;
import?android.widget.TextView;
import?com.stay.wifi.R;
/**
?*?@author?Stay?
?*?动态加载listview数据，上拉?刷新，下拉?更多
?*/
public?class?ListViewActivity?extends?Activity?implements?OnScrollListener?{
????private?static?final?int?LOAD?=?0;
????private?static?final?int?ERROR?=?0;
????private?static?final?int?MEMBER?=?1;
????private?static?final?int?LOADED?=?2;
????private?static?final?int?DIALOG?=?3;
????private?static?final?int?FULL?=?4;
????private?NearbyAdapter?adapter;
????private?ListView?nearby_lv;
????private?RelativeLayout?nearby_lv_header;
????private?Button?list_bottom_btn;
????private?LinearLayout?list_bottom_linear;
????private?TextView?bottom_progress_text;
????private?RelativeLayout?nearby_lv_footer;
????private?Button?list_header_btn;
????private?LinearLayout?list_header_linear;
????private?TextView?heard_progress_text;
????private?ArrayList<JSONObject>?nearby_data?=?new?ArrayList<JSONObject>();
????private?int?lastItem;
????private?HashMap<String,?Drawable>?imageCache;
????private?com.stay.main.ListViewActivity.MyHandler?myHandler;
????private?ProgressDialog?dialog;
????private?int?curPage?=?1;
????private?boolean?isMember?=?false;
????private?int?firstItem;
????public?int?count;
????/**?Called?when?the?activity?is?first?created.?*/
[email protected]
????public?void?onCreate(Bundle?savedInstanceState)?{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.main);
????????initView();
????????myHandler.sendEmptyMessage(LOAD);
????}
[email protected]
????public?void?onScrollStateChanged(AbsListView?view,?int?scrollState)?{
????????DebugUtil.debug("onScrollStateChanged");
????????//当滚动停止且滚动的总数等于数据的总数，去加载
????????if?(lastItem?==?count?&&?scrollState?==?SCROLL_STATE_IDLE)?{
????????????DebugUtil.debug("onScrollStateChanged--------next");
????????????if?(curPage?==?4?&&?!isMember)?{
????????????????DebugUtil.show(this,?"您不是正式会员，请申请正式会员，");
????????????????list_bottom_linear.setVisibility(View.GONE);
????????????}?else?{
????????????????//加载数据
????????????????myHandler.sendEmptyMessage(LOAD);
????????????}
????????????return;
????????}
????????//当往上拉时更新数据，将data清空然后去重新加载
????????if?(firstItem?==?0?&&?scrollState?==?SCROLL_STATE_IDLE)?{
????????????DebugUtil.debug("onScrollStateChanged--------refresh");
????????????curPage?=?0;
????????????myHandler.sendEmptyMessage(LOAD);
????????}
????}
[email protected]
????public?void?onScroll(AbsListView?view,?int?firstVisibleItem,?int?visibleItemCount,?int?totalItemCount)?{
????????DebugUtil.debug("firstVisibleItem="?+?firstVisibleItem);
????????DebugUtil.debug("visibleItemCount="?+?visibleItemCount);
????????DebugUtil.debug("totalItemCount="?+?totalItemCount);
????????//这里要减二，因为我加了header?footer
????????lastItem?=?firstVisibleItem?+?visibleItemCount?-?2;
????????firstItem?=?firstVisibleItem;
????}
????public?int?getData()?{
????????try?{
????????????HttpURLConnection?conn?=?DownloadUtil.download("http://zdevl.mapi.jjdd.com/nearby/lbs?page="?+?curPage);
????????????ArrayList<JSONObject>?temp?=?JSONUtil.streamToJsonList(conn.getInputStream());
????????????if?(curPage?==?0?&&?nearby_data.size()?>?0)?{
????????????????nearby_data.clear();
????????????????count?=?0;
????????????}
????????????if?(temp?!=?null?&&?temp.size()?>?0)?{
????????????????count?+=?temp.size();
????????????????nearby_data.addAll(temp);
????????????????DebugUtil.debug("nearby_data.size()="+nearby_data.size());
????????????}?else?{
????????????????return?FULL;
????????????}
????????????return?LOADED;
????????}?catch?(Exception?e)?{
????????????return?ERROR;
????????}
????}
????private?Handler?handler?=?new?Handler()?{
[email protected]
????????public?void?handleMessage(Message?msg)?{
????????????super.handleMessage(msg);
????????????switch?(msg.what)?{
????????????case?DIALOG:
????????????????list_bottom_linear.setVisibility(View.VISIBLE);
????????????????list_header_linear.setVisibility(View.VISIBLE);
????????????????break;
????????????case?LOADED:
????????????????list_bottom_linear.setVisibility(View.GONE);
????????????????list_header_linear.setVisibility(View.GONE);
????????????????curPage++;
????????????????adapter.notifyDataSetChanged();
????????????????break;
????????????case?ERROR:
????????????????DebugUtil.debug("error,missing?data");
????????????????break;
????????????case?MEMBER:
????????????????DebugUtil.debug("you?must?regist?formal?member");
????????????????break;
????????????default:
????????????????break;
????????????}
????????}
????};
//创建子线程加载数据，然后更新
????private?class?MyHandler?extends?Handler?{
????????private?int?status;
????????public?MyHandler(Looper?looper)?{
????????????super(looper);
????????}
[email protected]
????????public?void?handleMessage(Message?msg)?{
????????????synchronized?(this)?{
????????????????switch?(msg.what)?{
????????????????case?LOAD://?get?data?from?server
????????????????????handler.sendEmptyMessage(DIALOG);//显示等待框
????????????????????status?=?getData();
????????????????????handler.sendEmptyMessageDelayed(status,?1000);
????????????????????break;
????????????????default:
????????????????????break;
????????????????}
????????????}
????????}
????}
????public?void?initView()?{
????????imageCache?=?new?HashMap<String,?Drawable>();
????????HandlerThread?handlerThread?=?new?HandlerThread("nearby");
????????//?在使用HandlerThread的getLooper()方法之前，必须先调用该类的start();
????????handlerThread.start();
????????myHandler?=?new?MyHandler(handlerThread.getLooper());
????????nearby_lv?=?(ListView)?findViewById(R.id.nearby_lv);
????????nearby_lv_footer?=?(RelativeLayout)?LayoutInflater.from(ListViewActivity.this).inflate(R.layout.nearby_lv_header,?null);
????????list_bottom_btn?=?(Button)?nearby_lv_footer.findViewById(R.id.list_bottom_btn);
????????list_bottom_linear?=?(LinearLayout)?nearby_lv_footer.findViewById(R.id.list_bottom_linear);
????????bottom_progress_text?=?(TextView)?nearby_lv_footer.findViewById(R.id.progress_text);
????????nearby_lv_header?=?(RelativeLayout)?LayoutInflater.from(ListViewActivity.this).inflate(R.layout.nearby_lv_header,?null);
????????list_header_btn?=?(Button)?nearby_lv_header.findViewById(R.id.list_bottom_btn);
????????list_header_linear?=?(LinearLayout)?nearby_lv_header.findViewById(R.id.list_bottom_linear);
????????heard_progress_text?=?(TextView)?nearby_lv_header.findViewById(R.id.progress_text);
????????list_header_btn.setText("刷新");
????????list_bottom_btn.setText("更多");
????????list_header_linear.setVisibility(View.GONE);
????????nearby_lv.addHeaderView(nearby_lv_header);
????????nearby_lv.addFooterView(nearby_lv_footer);
????????//?list_header_btn.setOnClickListener(header_click);
????????adapter?=?new?NearbyAdapter(ListViewActivity.this,?nearby_data);
????????nearby_lv.setAdapter(adapter);
????????nearby_lv.setOnScrollListener(ListViewActivity.this);
????}
}
import?java.net.HttpURLConnection;
import?java.util.ArrayList;
import?java.util.HashMap;
import?org.json.JSONObject;
import?android.app.Activity;
import?android.app.ProgressDialog;
import?android.graphics.drawable.Drawable;
import?android.os.Bundle;
import?android.os.Handler;
import?android.os.HandlerThread;
import?android.os.Looper;
import?android.os.Message;
import?android.view.LayoutInflater;
import?android.view.View;
import?android.widget.AbsListView;
import?android.widget.AbsListView.OnScrollListener;
import?android.widget.Button;
import?android.widget.LinearLayout;
import?android.widget.ListView;
import?android.widget.RelativeLayout;
import?android.widget.TextView;
import?com.stay.wifi.R;
/**
?*?@author?Stay?
?*?动态加载listview数据，上拉?刷新，下拉?更多
?*/
public?class?ListViewActivity?extends?Activity?implements?OnScrollListener?{
????private?static?final?int?LOAD?=?0;
????private?static?final?int?ERROR?=?0;
????private?static?final?int?MEMBER?=?1;
????private?static?final?int?LOADED?=?2;
????private?static?final?int?DIALOG?=?3;
????private?static?final?int?FULL?=?4;
????private?NearbyAdapter?adapter;
????private?ListView?nearby_lv;
????private?RelativeLayout?nearby_lv_header;
????private?Button?list_bottom_btn;
????private?LinearLayout?list_bottom_linear;
????private?TextView?bottom_progress_text;
????private?RelativeLayout?nearby_lv_footer;
????private?Button?list_header_btn;
????private?LinearLayout?list_header_linear;
????private?TextView?heard_progress_text;
????private?ArrayList<JSONObject>?nearby_data?=?new?ArrayList<JSONObject>();
????private?int?lastItem;
????private?HashMap<String,?Drawable>?imageCache;
????private?com.stay.main.ListViewActivity.MyHandler?myHandler;
????private?ProgressDialog?dialog;
????private?int?curPage?=?1;
????private?boolean?isMember?=?false;
????private?int?firstItem;
????public?int?count;
????/**?Called?when?the?activity?is?first?created.?*/
[email protected]
????public?void?onCreate(Bundle?savedInstanceState)?{
????????super.onCreate(savedInstanceState);
????????setContentView(R.layout.main);
????????initView();
????????myHandler.sendEmptyMessage(LOAD);
????}
[email protected]
????public?void?onScrollStateChanged(AbsListView?view,?int?scrollState)?{
????????DebugUtil.debug("onScrollStateChanged");
????????//当滚动停止且滚动的总数等于数据的总数，去加载
????????if?(lastItem?==?count?&&?scrollState?==?SCROLL_STATE_IDLE)?{
????????????DebugUtil.debug("onScrollStateChanged--------next");
????????????if?(curPage?==?4?&&?!isMember)?{
????????????????DebugUtil.show(this,?"您不是正式会员，请申请正式会员，");
????????????????list_bottom_linear.setVisibility(View.GONE);
????????????}?else?{
????????????????//加载数据
????????????????myHandler.sendEmptyMessage(LOAD);
????????????}
????????????return;
????????}
????????//当往上拉时更新数据，将data清空然后去重新加载
????????if?(firstItem?==?0?&&?scrollState?==?SCROLL_STATE_IDLE)?{
????????????DebugUtil.debug("onScrollStateChanged--------refresh");
????????????curPage?=?0;
????????????myHandler.sendEmptyMessage(LOAD);
????????}
????}
[email protected]
????public?void?onScroll(AbsListView?view,?int?firstVisibleItem,?int?visibleItemCount,?int?totalItemCount)?{
????????DebugUtil.debug("firstVisibleItem="?+?firstVisibleItem);
????????DebugUtil.debug("visibleItemCount="?+?visibleItemCount);
????????DebugUtil.debug("totalItemCount="?+?totalItemCount);
????????//这里要减二，因为我加了header?footer
????????lastItem?=?firstVisibleItem?+?visibleItemCount?-?2;
????????firstItem?=?firstVisibleItem;
????}
????public?int?getData()?{
????????try?{
????????????HttpURLConnection?conn?=?DownloadUtil.download("http://zdevl.mapi.jjdd.com/nearby/lbs?page="?+?curPage);
????????????ArrayList<JSONObject>?temp?=?JSONUtil.streamToJsonList(conn.getInputStream());
????????????if?(curPage?==?0?&&?nearby_data.size()?>?0)?{
????????????????nearby_data.clear();
????????????????count?=?0;
????????????}
????????????if?(temp?!=?null?&&?temp.size()?>?0)?{
????????????????count?+=?temp.size();
????????????????nearby_data.addAll(temp);
????????????????DebugUtil.debug("nearby_data.size()="+nearby_data.size());
????????????}?else?{
????????????????return?FULL;
????????????}
????????????return?LOADED;
????????}?catch?(Exception?e)?{
????????????return?ERROR;
????????}
????}
????private?Handler?handler?=?new?Handler()?{
[email protected]
????????public?void?handleMessage(Message?msg)?{
????????????super.handleMessage(msg);
????????????switch?(msg.what)?{
????????????case?DIALOG:
????????????????list_bottom_linear.setVisibility(View.VISIBLE);
????????????????list_header_linear.setVisibility(View.VISIBLE);
????????????????break;
????????????case?LOADED:
????????????????list_bottom_linear.setVisibility(View.GONE);
????????????????list_header_linear.setVisibility(View.GONE);
????????????????curPage++;
????????????????adapter.notifyDataSetChanged();
????????????????break;
????????????case?ERROR:
????????????????DebugUtil.debug("error,missing?data");
????????????????break;
????????????case?MEMBER:
????????????????DebugUtil.debug("you?must?regist?formal?member");
????????????????break;
????????????default:
????????????????break;
????????????}
????????}
????};
//创建子线程加载数据，然后更新
????private?class?MyHandler?extends?Handler?{
????????private?int?status;
????????public?MyHandler(Looper?looper)?{
????????????super(looper);
????????}
[email protected]
????????public?void?handleMessage(Message?msg)?{
????????????synchronized?(this)?{
????????????????switch?(msg.what)?{
????????????????case?LOAD://?get?data?from?server
????????????????????handler.sendEmptyMessage(DIALOG);//显示等待框
????????????????????status?=?getData();
????????????????????handler.sendEmptyMessageDelayed(status,?1000);
????????????????????break;
????????????????default:
????????????????????break;
????????????????}
????????????}
????????}
????}
????public?void?initView()?{
????????imageCache?=?new?HashMap<String,?Drawable>();
????????HandlerThread?handlerThread?=?new?HandlerThread("nearby");
????????//?在使用HandlerThread的getLooper()方法之前，必须先调用该类的start();
????????handlerThread.start();
????????myHandler?=?new?MyHandler(handlerThread.getLooper());
????????nearby_lv?=?(ListView)?findViewById(R.id.nearby_lv);
????????nearby_lv_footer?=?(RelativeLayout)?LayoutInflater.from(ListViewActivity.this).inflate(R.layout.nearby_lv_header,?null);
????????list_bottom_btn?=?(Button)?nearby_lv_footer.findViewById(R.id.list_bottom_btn);
????????list_bottom_linear?=?(LinearLayout)?nearby_lv_footer.findViewById(R.id.list_bottom_linear);
????????bottom_progress_text?=?(TextView)?nearby_lv_footer.findViewById(R.id.progress_text);
????????nearby_lv_header?=?(RelativeLayout)?LayoutInflater.from(ListViewActivity.this).inflate(R.layout.nearby_lv_header,?null);
????????list_header_btn?=?(Button)?nearby_lv_header.findViewById(R.id.list_bottom_btn);
????????list_header_linear?=?(LinearLayout)?nearby_lv_header.findViewById(R.id.list_bottom_linear);
????????heard_progress_text?=?(TextView)?nearby_lv_header.findViewById(R.id.progress_text);
????????list_header_btn.setText("刷新");
????????list_bottom_btn.setText("更多");
????????list_header_linear.setVisibility(View.GONE);
????????nearby_lv.addHeaderView(nearby_lv_header);
????????nearby_lv.addFooterView(nearby_lv_footer);
????????//?list_header_btn.setOnClickListener(header_click);
????????adapter?=?new?NearbyAdapter(ListViewActivity.this,?nearby_data);
????????nearby_lv.setAdapter(adapter);
????????nearby_lv.setOnScrollListener(ListViewActivity.this);
????}
}
?
核心部分就是这了，其他adapter，downloadUtil,debugUtil都在以前的帖子里，就不发了。
有问题的可以直接留言，或者加qq或加群:19370204
?
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1 楼 sipeng 2011-12-05
您好,最近也在开发类似的功能,能不能麻烦您发下demo，感谢,[email protected]
2 楼 yzx503319102 2012-01-06
最恶心的代码 敢不敢弄出一个demo来 这样让人怎么用 怎么改