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/**
* 事件列表
*
* @author 技术作坊
* @version 1.0
*/
public class RemindListViewActivity extends Activity {
private RemindListAdapter listItemAdapter = new RemindListAdapter();// 适配器
private String jsonResult;// 从PHP返回的JSON
private List<JSONObject> jsonData;// JSON集合
private ImageView refreshImageView;// 刷新
private ProgressBar progressBar;// 圆形进度
private ListView listView;// 列表
private View footView;// 底部布局
private Button viewMoreButton;// 底部查看更多按钮
LinearLayout footerProgressBarLayout;// 底部圆形进度
private Handler handler;
private GetDetailThread thread;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.remind_listview);
listView = (ListView) findViewById(R.id.remind_ListView);
refreshImageView = (ImageView) findViewById(R.id.refresh_ImageView);
progressBar = (ProgressBar) findViewById(R.id.pb);
// 向列表添加一个页脚
LayoutInflater inflater = LayoutInflater.from(this);
footView = inflater.inflate(R.layout.load_more, null);
viewMoreButton = (Button) footView.findViewById(R.id.viewmorebutton);
footerProgressBarLayout = (LinearLayout) footView
.findViewById(R.id.linearlayout);
listView.addFooterView(footView);
/******当submintData()返回true时获取数据并显示查看更多数据的按钮，否则隐藏并提示程序错误******/
if (submintData(0) == true) {
progressBar.setVisibility(View.GONE);
footerProgressBarLayout.setVisibility(View.GONE);
handler = new DealHandler();
thread = new GetDetailThread();
thread.start();// 开启一个线程获取数据
// refreshImageView.setOnClickListener(new
// refreshImageViewClick());// 刷新
viewMoreButton.setOnClickListener(new ViewMoreClickListener());// 查看更多
} else {
handler = new DealHandler();
progressBar.setVisibility(View.GONE);
footerProgressBarLayout.setVisibility(View.GONE);
Toast.makeText(getApplicationContext(), "程序错误", Toast.LENGTH_SHORT)
.show();
}
refreshImageView.setOnClickListener(new refreshImageViewClick());// 刷新
}
/**
* 查看更多
*
* @author Guozhilong
*
*/
class ViewMoreClickListener implements OnClickListener {
@Override
public void onClick(View v) {
footerProgressBarLayout.setVisibility(View.VISIBLE);// 显示
viewMoreButton.setVisibility(View.GONE);// 隐藏
handler.postDelayed(new Runnable() {
@Override
public void run() {
int count = listItemAdapter.getCount();
count += 10;// 在原有的基础上再加10
submintData(count);
// 当返回的JSON为空时做如下判断
if (jsonResult.equals("null")) {
footerProgressBarLayout.setVisibility(View.GONE);// 隐藏
viewMoreButton.setVisibility(View.VISIBLE);// 显示
Toast.makeText(getApplicationContext(),
"数据全部加载完成，没有更多数据", Toast.LENGTH_SHORT).show();
} else {
footerProgressBarLayout.setVisibility(View.GONE);// 隐藏
viewMoreButton.setVisibility(View.VISIBLE);// 显示
try {
JSONArray jsonArray = new JSONArray(jsonResult);
System.out.print(jsonArray.length());
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject json = jsonArray.getJSONObject(i);
listItemAdapter.addNewsItem(json);
}
listItemAdapter.notifyDataSetChanged();
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}, 2000);
}
}
/**
* 提交数据
*
* @param beginNumStr
* @return
*/
public Boolean submintData(int beginNumStr) {
Map<String, String> map = new HashMap<String, String>();
map.put("beginNum", String.valueOf(beginNumStr));
boolean result = false;
try {
result = submintDataByHttpClientDoPost(map,
"http://192.168.1.116/DataInteraction/responsefenye.php");
} catch (Exception e) {
e.printStackTrace();
}
if (result) {
return true;
} else {
return false;
}
}
/**
* 以HttpClient的DoPost方式提交数据到服务器
*
* @param map
* 传递进来的数据，以map的形式进行了封装
* @param path
* 要求服务器PHP的地址 返回的boolean类型的参数
* @throws Exception
*/
public Boolean submintDataByHttpClientDoPost(Map<String, String> map,
String path) throws Exception {
// 1. 获得一个相当于浏览器对象HttpClient，使用这个接口的实现类来创建对象，DefaultHttpClient
HttpClient hc = new DefaultHttpClient();
// DoPost方式请求的时候设置请求，关键是路径
HttpPost request = new HttpPost(path);
// 2. 为请求设置请求参数，也即是将要上传到web服务器上的参数
List<NameValuePair> parameters = new ArrayList<NameValuePair>();
for (Map.Entry<String, String> entry : map.entrySet()) {
NameValuePair nameValuePairs = new BasicNameValuePair(
entry.getKey(), entry.getValue());
parameters.add(nameValuePairs);
}
// 请求实体HttpEntity也是一个接口，我们用它的实现类UrlEncodedFormEntity来创建对象，注意后面一个String类型的参数是用来指定编码的
HttpEntity entity = new UrlEncodedFormEntity(parameters, "gbk");
request.setEntity(entity);
// 3. 执行请求
HttpResponse response = hc.execute(request);
// 4. 通过返回码来判断请求成功与否
if (response.getStatusLine().getStatusCode() == HttpURLConnection.HTTP_OK) {
jsonResult = EntityUtils.toString(response.getEntity());// 获取PHP端的echo
return true;
}
return false;
}
/**
* 获取JSON
*
* @param result
* @return
*/
public List<JSONObject> getData(String result) {
// String url = "http://192.168.1.116/DataInteraction/responsejson.php";
// String result = HttpConn.getResult(url);
jsonData = new ArrayList<JSONObject>();
try {
JSONArray jsonArray = new JSONArray(result);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject json = jsonArray.getJSONObject(i);
jsonData.add(json);
}
} catch (JSONException e) {
e.printStackTrace();
}
return jsonData;
}
// 开启线程获取数据
class GetDetailThread extends Thread {
public void run() {
jsonData = getData(jsonResult);
Message msg = handler.obtainMessage();
handler.sendMessage(msg);
}
}
class DealHandler extends Handler {
public void handleMessage(Message msg) {
listItemAdapter.setContext(RemindListViewActivity.this);
listItemAdapter.setList(jsonData);
listView.setAdapter(listItemAdapter);
}
}
/**
* 刷新
*
* @author Guozhilong
*
*/
class refreshImageViewClick implements OnClickListener {
@Override
public void onClick(View v) {
refreshImageView.setVisibility(View.GONE);
progressBar.setVisibility(View.VISIBLE);
footerProgressBarLayout.setVisibility(View.GONE);
handler.postDelayed(new Runnable() {
@Override
public void run() {
if (submintData(0) == true) {
thread = new GetDetailThread();
thread.start();// 开启一个线程获取数据
refreshImageView.setVisibility(View.VISIBLE);
progressBar.setVisibility(View.GONE);
footerProgressBarLayout.setVisibility(View.VISIBLE);
} else {
refreshImageView.setVisibility(View.VISIBLE);
progressBar.setVisibility(View.GONE);
footerProgressBarLayout.setVisibility(View.GONE);
Toast.makeText(getApplicationContext(), "程序错误",
Toast.LENGTH_SHORT).show();
}
}
}, 2000);
}
}
}
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