package com.roboo.qiushibaike.fragment;
import java.io.IOException;
import java.net.SocketTimeoutException;
import java.util.LinkedList;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.AsyncTask.Status;
import android.os.Bundle;
import android.os.Looper;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;
import com.roboo.qiushibaike.R;
import com.roboo.qiushibaike.WebViewActivity;
import com.roboo.qiushibaike.adapter.BaseListAdapter;
import com.roboo.qiushibaike.model.KJFMItem;
import com.roboo.qiushibaike.ptr.PullToRefreshBase;
import com.roboo.qiushibaike.ptr.PullToRefreshBase.OnRefreshListener2;
import com.roboo.qiushibaike.ptr.PullToRefreshListView;
import com.roboo.qiushibaike.utils.KJFMUtils;
import com.roboo.qiushibaike.view.RoundProgressBar;
public class KJFMFragment extends Fragment
{
private PullToRefreshListView mPTRListView;
private RoundProgressBar mRoundProgressBar;
private TextView mTextView;
private LinkedList<KJFMItem> mData;
private ProgressBar mProgressBar;
private BaseListAdapter<KJFMItem> mAdapter;
private static final String PREF_UPDATE_TIME_FLAG = "csdn";// csdn android
private int mCurrentPageNo = 1;
private GetDataTask mGetDataTask = new GetDataTask();
private static final int ONE_MINUTE = 60 * 1000;
public static KJFMFragment newInstance()
{
KJFMFragment kjfmFragment = new KJFMFragment();
return kjfmFragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
View view = inflater.inflate(R.layout.ptr_listview, null);
view.setPadding(0, 0, 0, 0);
mPTRListView = (PullToRefreshListView) view.findViewById(R.id.ptr_listview);
mTextView = (TextView) view.findViewById(R.id.tv_text);
mRoundProgressBar = (RoundProgressBar) view.findViewById(R.id.roundProgressBar);
mProgressBar = (ProgressBar) view.findViewById(R.id.pb_progress);
mRoundProgressBar.setVisibility(View.INVISIBLE);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState)
{
super.onActivityCreated(savedInstanceState);
setListener();
SharedPreferences preferences = getActivity().getSharedPreferences(getActivity().getPackageName(), Context.MODE_PRIVATE);
if (mData == null)
{
mProgressBar.setVisibility(View.VISIBLE);
}
// 每隔60秒去获取一次数据
if (mData == null || (System.currentTimeMillis() - preferences.getLong(PREF_UPDATE_TIME_FLAG, System.currentTimeMillis()) == 0)
|| (System.currentTimeMillis() - preferences.getLong(PREF_UPDATE_TIME_FLAG, System.currentTimeMillis()) > ONE_MINUTE))
{
// 自动刷新
mPTRListView.setRefreshing(); // 去执行onPullDownToRefresh
preferences.edit().putLong(PREF_UPDATE_TIME_FLAG, System.currentTimeMillis()).commit();
mPTRListView.setShowViewWhileRefreshing(true);
System.out.println("应该去获取数据了 " + mGetDataTask.getStatus());
if (mGetDataTask.getStatus() == Status.PENDING)
{
System.out.println("上一个任务已经执行完毕");
String[] params = new String[] { "" + mCurrentPageNo };
mGetDataTask = new GetDataTask();
mGetDataTask.execute(params);
}
}
}
@Override
public void onPause()
{
if (mGetDataTask.getStatus() == Status.RUNNING)
{
mGetDataTask.cancel(true);
// Toast.makeText(getActivity(), "Fragment发生切换,当前任务应该取消",
// Toast.LENGTH_SHORT).show());
System.out.println("Fragment发生切换,当前任务应该取消");
}
super.onPause();
}
private void setListener()
{
this.mPTRListView.setOnRefreshListener(new OnRefreshListener2<ListView>()
{
@Override
public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView)
{
mCurrentPageNo = 1;
String[] params = new String[] { "" + mCurrentPageNo };
if (mPTRListView.isRefreshing())
{
mGetDataTask = new GetDataTask();
mGetDataTask.execute(params);
Toast.makeText(getActivity(), "正在下拉刷新中……", Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getActivity(), "已经开始下拉刷新中……", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView)
{
mCurrentPageNo += 1;
String[] params = new String[] { "" + mCurrentPageNo };
if (mPTRListView.isRefreshing())
{
mGetDataTask = new GetDataTask();
mGetDataTask.execute(params);
Toast.makeText(getActivity(), "正在努力加载中……", Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getActivity(), "已经开始努力加载中……", Toast.LENGTH_SHORT).show();
}
}
});
this.mPTRListView.getRefreshableView().setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
KJFMItem item = (KJFMItem) parent.getAdapter().getItem(position);
Intent intent = new Intent(getActivity(), WebViewActivity.class);
intent.putExtra("item", item);
startActivity(intent);
}
});
}
public class GetDataTask extends AsyncTask<String, Float, LinkedList<KJFMItem>>
{
@Override
protected LinkedList<KJFMItem> doInBackground(String... params)
{
System.out.println("mCurrentPageNo = " + mCurrentPageNo);
LinkedList<KJFMItem> data = null;
try
{
data = KJFMUtils.handleKJFMItems(params[0]);
}
catch (SocketTimeoutException e)
{
e.printStackTrace();
Looper.prepare();
Toast.makeText(getActivity(), "连接超时异常", Toast.LENGTH_SHORT).show();
Looper.loop();
}
catch (IOException e)
{
e.printStackTrace();
Looper.prepare();
Toast.makeText(getActivity(), "发生I/O异常", Toast.LENGTH_SHORT).show();
Looper.loop();
}
catch (Exception e)
{
e.printStackTrace();
Looper.prepare();
Toast.makeText(getActivity(), "发生异常", Toast.LENGTH_SHORT).show();
Looper.loop();
}
return data;
}
@Override
protected void onCancelled()
{
mPTRListView.onRefreshComplete();
System.out.println("onCancelled 执行");
}
@Override
protected void onProgressUpdate(Float... values)
{
super.onProgressUpdate(values);
if (mData == null && mCurrentPageNo == 1)
{
mRoundProgressBar.setProgress(values[0].intValue());
if (values[0] > 99)
{
mTextView.setVisibility(View.GONE);
mRoundProgressBar.setVisibility(View.GONE);
}
}
}
@Override
protected void onPostExecute(LinkedList<KJFMItem> result)
{
super.onPostExecute(result);
mPTRListView.onRefreshComplete();
mProgressBar.setVisibility(View.GONE);
mTextView.setVisibility(View.GONE);
if (result != null)
{
if (mCurrentPageNo == 1)
{
mData = null;
}
if (null == mData)// 第一次肯定为空
{
mData = new LinkedList<KJFMItem>();
mData.addAll(result);
mAdapter = new BaseListAdapter<KJFMItem>(getActivity(), mData);
mPTRListView.setAdapter(mAdapter);
}
else
{
if (mCurrentPageNo == 1)// 下拉刷新有数据应该放在最前面
{
for (KJFMItem item : result)
{
if (!mData.contains(item))
{
mData.addLast(item);
}
}
}
else
{
for (KJFMItem item : result)
{
if (!mData.contains(item))
{
mData.addLast(item);
}
}
}
mAdapter.notifyDataSetChanged();
}
}
else
{
if (mCurrentPageNo > 1)
{
mCurrentPageNo -= 1;
}
}
}
}
}