Android ListView下拉刷新，androidlistview
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Android ListView下拉刷新，androidlistview
<无详细内容>1.[Java]代码
package com.stay.main;
002
003 import java.net.HttpURLConnection;
004 import java.util.ArrayList;
005 import java.util.HashMap;
006
007 import org.json.JSONObject;
008
009 import android.app.Activity;
010 import android.app.ProgressDialog;
011 import android.graphics.drawable.Drawable;
012 import android.os.Bundle;
013 import android.os.Handler;
014 import android.os.HandlerThread;
015 import android.os.Looper;
016 import android.os.Message;
017 import android.view.LayoutInflater;
018 import android.view.View;
019 import android.widget.AbsListView;
020 import android.widget.AbsListView.OnScrollListener;
021 import android.widget.Button;
022 import android.widget.LinearLayout;
023 import android.widget.ListView;
024 import android.widget.RelativeLayout;
025 import android.widget.TextView;
026
027 import com.stay.wifi.R;
028
029 /**
030 * @author Stay
031 * 动态加载listview数据，上拉 刷新，下拉 更多
032 */
033 public class ListViewActivity extends Activity implements OnScrollListener {
034 private static final int LOAD = 0;
035 private static final int ERROR = 0;
036 private static final int MEMBER = 1;
037 private static final int LOADED = 2;
038 private static final int DIALOG = 3;
039 private static final int FULL = 4;
040 private NearbyAdapter adapter;
041 private ListView nearby_lv;
042 private RelativeLayout nearby_lv_header;
043 private Button list_bottom_btn;
044 private LinearLayout list_bottom_linear;
045 private TextView bottom_progress_text;
046 private RelativeLayout nearby_lv_footer;
047 private Button list_header_btn;
048 private LinearLayout list_header_linear;
049 private TextView heard_progress_text;
050 private ArrayList<JSONObject> nearby_data = new ArrayList<JSONObject>();
051 private int lastItem;
052 private HashMap<String, Drawable> imageCache;
053 private com.stay.main.ListViewActivity.MyHandler myHandler;
054 private ProgressDialog dialog;
055 private int curPage = 1;
056 private boolean isMember = false;
057 private int firstItem;
058 public int count;
059
060 /** Called when the activity is first created. */
061 @Override
062 public void onCreate(Bundle savedInstanceState) {
063 super.onCreate(savedInstanceState);
064 setContentView(R.layout.main);
065 initView();
066 myHandler.sendEmptyMessage(LOAD);
067 }
068
069 @Override
070 public void onScrollStateChanged(AbsListView view, int scrollState) {
071 DebugUtil.debug("onScrollStateChanged");
072 //当滚动停止且滚动的总数等于数据的总数，去加载
073 if (lastItem == count && scrollState == SCROLL_STATE_IDLE) {
074 DebugUtil.debug("onScrollStateChanged--------next");
075 if (curPage == 4 && !isMember) {
076 DebugUtil.show(this, "您不是正式会员，请申请正式会员，");
077 list_bottom_linear.setVisibility(View.GONE);
078 } else {
079 //加载数据
080 myHandler.sendEmptyMessage(LOAD);
081 }
082 return;
083 }
084 //当往上拉时更新数据，将data清空然后去重新加载
085 if (firstItem == 0 && scrollState == SCROLL_STATE_IDLE) {
086 DebugUtil.debug("onScrollStateChanged--------refresh");
087 curPage = 0;
088 myHandler.sendEmptyMessage(LOAD);
089 }
090 }
091
092 @Override
093 public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
094 DebugUtil.debug("firstVisibleItem=" + firstVisibleItem);
095 DebugUtil.debug("visibleItemCount=" + visibleItemCount);
096 DebugUtil.debug("totalItemCount=" + totalItemCount);
097 //这里要减二，因为我加了header footer
098 lastItem = firstVisibleItem + visibleItemCount - 2;
099 firstItem = firstVisibleItem;
100 }
101
102 public int getData() {
103 try {
104 HttpURLConnection conn = DownloadUtil.download("http://zdevl.mapi.jjdd.com/nearby/lbs?page=" + curPage);
105 ArrayList<JSONObject> temp = JSONUtil.streamToJsonList(conn.getInputStream());
106 if (curPage == 0 && nearby_data.size() > 0) {
107 nearby_data.clear();
108 count = 0;
109 }
110 if (temp != null && temp.size() > 0) {
111 count += temp.size();
112 nearby_data.addAll(temp);
113 DebugUtil.debug("nearby_data.size()="+nearby_data.size());
114 } else {
115 return FULL;
116 }
117 return LOADED;
118 } catch (Exception e) {
119 return ERROR;
120 }
121 }
122
123 private Handler handler = new Handler() {
124 @Override
125 public void handleMessage(Message msg) {
126 super.handleMessage(msg);
127 switch (msg.what) {
128 case DIALOG:
129 list_bottom_linear.setVisibility(View.VISIBLE);
130 list_header_linear.setVisibility(View.VISIBLE);
131 break;
132 case LOADED:
133 list_bottom_linear.setVisibility(View.GONE);
134 list_header_linear.setVisibility(View.GONE);
135 curPage++;
136 adapter.notifyDataSetChanged();
137 break;
138 case ERROR:
139 DebugUtil.debug("error,missing data");
140 break;
141 case MEMBER:
142 DebugUtil.debug("you must regist formal member");
143 break;
144 default:
145 break;
146 }
147 }
148 };
149 //创建子线程加载数据，然后更新
150 private class MyHandler extends Handler {
151 private int status;
152
153 public MyHandler(Looper looper) {
154 super(looper);
155 }
156
157 @Override
158 public void handleMessage(Message msg) {
159 synchronized (this) {
160 switch (msg.what) {
161 case LOAD:// get data from server
162 handler.sendEmptyMessage(DIALOG);//显示等待框
163 status = getData();
164 handler.sendEmptyMessageDelayed(status, 1000);
165 break;
166 default:
167 break;
168 }
169 }
170 }
171 }
172
173 public void initView() {
174 imageCache = new HashMap<String, Drawable>();
175 HandlerThread handlerThread = new HandlerThread("nearby");
176 // 在使用HandlerThread的getLooper()方法之前，必须先调用该类的start();
177 handlerThread.start();
178 myHandler = new MyHandler(handlerThread.getLooper());
179 nearby_lv = (ListView) findViewById(R.id.nearby_lv);
180 nearby_lv_footer = (RelativeLayout) LayoutInflater.from(ListViewActivity.this).inflate(R.layout.nearby_lv_header, null);
181 list_bottom_btn = (Button) nearby_lv_footer.findViewById(R.id.list_bottom_btn);
182 list_bottom_linear = (LinearLayout) nearby_lv_footer.findViewById(R.id.list_bottom_linear);
183 bottom_progress_text = (TextView) nearby_lv_footer.findViewById(R.id.progress_text);
184 nearby_lv_header = (RelativeLayout) LayoutInflater.from(ListViewActivity.this).inflate(R.layout.nearby_lv_header, null);
185 list_header_btn = (Button) nearby_lv_header.findViewById(R.id.list_bottom_btn);
186 list_header_linear = (LinearLayout) nearby_lv_header.findViewById(R.id.list_bottom_linear);
187 heard_progress_text = (TextView) nearby_lv_header.findViewById(R.id.progress_text);
188 list_header_btn.setText("刷新");
189 list_bottom_btn.setText("更多");
190 list_header_linear.setVisibility(View.GONE);
191 nearby_lv.addHeaderView(nearby_lv_header);
192 nearby_lv.addFooterView(nearby_lv_footer);
193 // list_header_btn.setOnClickListener(header_click);
194 adapter = new NearbyAdapter(ListViewActivity.this, nearby_data);
195 nearby_lv.setAdapter(adapter);
196 nearby_lv.setOnScrollListener(ListViewActivity.this);
197 }
198 }
2.[Java]代码
package com.stay.main;
002
003 import java.net.HttpURLConnection;
004 import java.util.ArrayList;
005 import java.util.HashMap;
006
007 import org.json.JSONObject;
008
009 import android.app.Activity;
010 import android.app.ProgressDialog;
011 import android.graphics.drawable.Drawable;
012 import android.os.Bundle;
013 import android.os.Handler;
014 import android.os.HandlerThread;
015 import android.os.Looper;
016 import android.os.Message;
017 import android.view.LayoutInflater;
018 import android.view.View;
019 import android.widget.AbsListView;
020 import android.widget.AbsListView.OnScrollListener;
021 import android.widget.Button;
022 import android.widget.LinearLayout;
023 import android.widget.ListView;
024 import android.widget.RelativeLayout;
025 import android.widget.TextView;
026
027 import com.stay.wifi.R;
028
029 /**
030 * @author Stay
031 * 动态加载listview数据，上拉 刷新，下拉 更多
032 */
033 public class ListViewActivity extends Activity implements OnScrollListener {
034 private static final int LOAD = 0;
035 private static final int ERROR = 0;
036 private static final int MEMBER = 1;
037 private static final int LOADED = 2;
038 private static final int DIALOG = 3;
039 private static final int FULL = 4;
040 private NearbyAdapter adapter;
041 private ListView nearby_lv;
042 private RelativeLayout nearby_lv_header;
043 private Button list_bottom_btn;
044 private LinearLayout list_bottom_linear;
045 private TextView bottom_progress_text;
046 private RelativeLayout nearby_lv_footer;
047 private Button list_header_btn;
048 private LinearLayout list_header_linear;
049 private TextView heard_progress_text;
050 private ArrayList<JSONObject> nearby_data = new ArrayList<JSONObject>();
051 private int lastItem;
052 private HashMap<String, Drawable> imageCache;
053 private com.stay.main.ListViewActivity.MyHandler myHandler;
054 private ProgressDialog dialog;
055 private int curPage = 1;
056 private boolean isMember = false;
057 private int firstItem;
058 public int count;
059
060 /** Called when the activity is first created. */
061 @Override
062 public void onCreate(Bundle savedInstanceState) {
063 super.onCreate(savedInstanceState);
064 setContentView(R.layout.main);
065 initView();
066 myHandler.sendEmptyMessage(LOAD);
067 }
068
069 @Override
070 public void onScrollStateChanged(AbsListView view, int scrollState) {
071 DebugUtil.debug("onScrollStateChanged");
072 //当滚动停止且滚动的总数等于数据的总数，去加载
073 if (lastItem == count && scrollState == SCROLL_STATE_IDLE) {
074 DebugUtil.debug("onScrollStateChanged--------next");
075 if (curPage == 4 && !isMember) {
076 DebugUtil.show(this, "您不是正式会员，请申请正式会员，");
077 list_bottom_linear.setVisibility(View.GONE);
078 } else {
079 //加载数据
080 myHandler.sendEmptyMessage(LOAD);
081 }
082 return;
083 }
084 //当往上拉时更新数据，将data清空然后去重新加载
085 if (firstItem == 0 && scrollState == SCROLL_STATE_IDLE) {
086 DebugUtil.debug("onScrollStateChanged--------refresh");
087 curPage = 0;
088 myHandler.sendEmptyMessage(LOAD);
089 }
090 }
091
092 @Override
093 public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
094 DebugUtil.debug("firstVisibleItem=" + firstVisibleItem);
095 DebugUtil.debug("visibleItemCount=" + visibleItemCount);
096 DebugUtil.debug("totalItemCount=" + totalItemCount);
097 //这里要减二，因为我加了header footer
098 lastItem = firstVisibleItem + visibleItemCount - 2;
099 firstItem = firstVisibleItem;
100 }
101
102 public int getData() {
103 try {
104 HttpURLConnection conn = DownloadUtil.download("http://zdevl.mapi.jjdd.com/nearby/lbs?page=" + curPage);
105 ArrayList<JSONObject> temp = JSONUtil.streamToJsonList(conn.getInputStream());
106 if (curPage == 0 && nearby_data.size() > 0) {
107 nearby_data.clear();
108 count = 0;
109 }
110 if (temp != null && temp.size() > 0) {
111 count += temp.size();
112 nearby_data.addAll(temp);
113 DebugUtil.debug("nearby_data.size()="+nearby_data.size());
114 } else {
115 return FULL;
116 }
117 return LOADED;
118 } catch (Exception e) {
119 return ERROR;
120 }
121 }
122
123 private Handler handler = new Handler() {
124 @Override
125 public void handleMessage(Message msg) {
126 super.handleMessage(msg);
127 switch (msg.what) {
128 case DIALOG:
129 list_bottom_linear.setVisibility(View.VISIBLE);
130 list_header_linear.setVisibility(View.VISIBLE);
131 break;
132 case LOADED:
133 list_bottom_linear.setVisibility(View.GONE);
134 list_header_linear.setVisibility(View.GONE);
135 curPage++;
136 adapter.notifyDataSetChanged();
137 break;
138 case ERROR:
139 DebugUtil.debug("error,missing data");
140 break;
141 case MEMBER:
142 DebugUtil.debug("you must regist formal member");
143 break;
144 default:
145 break;
146 }
147 }
148 };
149 //创建子线程加载数据，然后更新
150 private class MyHandler extends Handler {
151 private int status;
152
153 public MyHandler(Looper looper) {
154 super(looper);
155 }
156
157 @Override
158 public void handleMessage(Message msg) {
159 synchronized (this) {
160 switch (msg.what) {
161 case LOAD:// get data from server
162 handler.sendEmptyMessage(DIALOG);//显示等待框
163 status = getData();
164 handler.sendEmptyMessageDelayed(status, 1000);
165 break;
166 default:
167 break;
168 }
169 }
170 }
171 }
172
173 public void initView() {
174 imageCache = new HashMap<String, Drawable>();
175 HandlerThread handlerThread = new HandlerThread("nearby");
176 // 在使用HandlerThread的getLooper()方法之前，必须先调用该类的start();
177 handlerThread.start();
178 myHandler = new MyHandler(handlerThread.getLooper());
179 nearby_lv = (ListView) findViewById(R.id.nearby_lv);
180 nearby_lv_footer = (RelativeLayout) LayoutInflater.from(ListViewActivity.this).inflate(R.layout.nearby_lv_header, null);
181 list_bottom_btn = (Button) nearby_lv_footer.findViewById(R.id.list_bottom_btn);
182 list_bottom_linear = (LinearLayout) nearby_lv_footer.findViewById(R.id.list_bottom_linear);
183 bottom_progress_text = (TextView) nearby_lv_footer.findViewById(R.id.progress_text);
184 nearby_lv_header = (RelativeLayout) LayoutInflater.from(ListViewActivity.this).inflate(R.layout.nearby_lv_header, null);
185 list_header_btn = (Button) nearby_lv_header.findViewById(R.id.list_bottom_btn);
186 list_header_linear = (LinearLayout) nearby_lv_header.findViewById(R.id.list_bottom_linear);
187 heard_progress_text = (TextView) nearby_lv_header.findViewById(R.id.progress_text);
188 list_header_btn.setText("刷新");
189 list_bottom_btn.setText("更多");
190 list_header_linear.setVisibility(View.GONE);
191 nearby_lv.addHeaderView(nearby_lv_header);
192 nearby_lv.addFooterView(nearby_lv_footer);
193 // list_header_btn.setOnClickListener(header_click);
194 adapter = new NearbyAdapter(ListViewActivity.this, nearby_data);
195 nearby_lv.setAdapter(adapter);
196 nearby_lv.setOnScrollListener(ListViewActivity.this);
197 }
198 }
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