listview分页

来源：互联网发布：mysql 5.7数据库迁移编辑：程序博客网时间：2024/05/16 17:27

package com.ishow.kinmet.ui;

import java.util.List;
import android.content.Intent;
import android.os.AsyncTask.Status;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

import com.ishow.kinmet.bean.AgencyApproval;
import com.ishow.kinmet.comm.BaseResult;
import com.ishow.kinmet.data.DataCenter;
import com.ishow.kinmet.task.AgencyApprovalDetailTask;
import com.ishow.kinmet.task.SimpleDialogProgress;
import com.ishow.kinmet.task.TaskHost;
import com.ishow.kinmet.ui.adapter.SimpleListViewAdapter;
import com.ishow.kinmet.ui.adapter.viewholder.AgencyApprovalReportTitleViewHolder;
import com.ishow.util.ui.BaseActivity;

public class HomeActivity extends BaseActivity {

private TextView currentUserTextView;
private Button newReportButton;
private Button agencyTransactionButton;
private Button messageButton;
private Button officialDocumentButton;
private Button prePageBtn;
private Button nextPageBtn;
private AgencyApprovalDetailTask approvalTask;
private ListView listView;
private SimpleListViewAdapter<AgencyApproval, AgencyApprovalReportTitleViewHolder> adapter;
private int viewCount = 10; //10 record a page
private int pageIndex=0;
@Override
protected void initUI() {
  super.initUI();
  setContentView(R.layout.main);
     initListView();
  currentUserTextView = (TextView) findViewById(R.id.wellcom_user);
  if (DataCenter.getCurrentUser() != null) {
   currentUserTextView
     .setText(DataCenter.getCurrentUser().getEmName());
  }

  newReportButton = (Button) findViewById(R.id.new_report);
  newReportButton.setOnClickListener(new OnClickListener() {
   public void onClick(View v) {
    //TODO sth here executeLoginTask();
   }

  });

  agencyTransactionButton = (Button) findViewById(R.id.my_agency_transaction);
  agencyTransactionButton.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
   }
  });

  messageButton = (Button) findViewById(R.id.my_message);
  messageButton.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
             //TODO sth here
   }
  });

  officialDocumentButton = (Button) findViewById(R.id.my_official_document);
  officialDocumentButton.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {
    Intent intent = new Intent();
    intent.setClass(HomeActivity.this, ReportCenterActivity.class);
    startActivity(intent);

   }
  });

  prePageBtn=(Button)findViewById(R.id.pre_page_btn);
  prePageBtn.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
     to_Forward();
   }
  });

    nextPageBtn=(Button)findViewById(R.id.next_page_btn);
       nextPageBtn.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    to_Backward();}
  });


}

/**
   * 上一页
   */
private void to_Forward() {
   pageIndex-- ;
   updataPage();
}

/**
   * 下一页
   */
private void to_Backward() {
   pageIndex ++ ;
   updataPage();
}

private void initListView() {
        listView =(ListView) findViewById(R.id.agency_approval_title_listview);
        adapter = new SimpleListViewAdapter<AgencyApproval, AgencyApprovalReportTitleViewHolder>(
    this, R.layout.viewholder_agency_approval_report_title,
    AgencyApprovalReportTitleViewHolder.class);

  listView.setAdapter(adapter);
  executeTask();
}

private void executeTask() {
  if(approvalTask!=null && approvalTask.getStatus() != Status.RUNNING){
   return ;
  }
  approvalTask = new AgencyApprovalDetailTask(DataCenter.getCurrentUser().getEmId(),0,30,0);
  approvalTask.setTaskHost(approvalTaskHost);
  approvalTask.setProgress(new SimpleDialogProgress(this, "",
    getString(R.string.get_data)));
  approvalTask.execute();

}

private TaskHost approvalTaskHost = new TaskHost() {
public void onPostExecute(int requestCode, BaseResult result) {
adapter.setList(DataCenter.getCurrentApproval());

}
};

private void checkButton(int size){
if(pageIndex<= 0){
       prePageBtn.setEnabled(false);
   }else if(size-pageIndex*viewCount<=viewCount){
    nextPageBtn.setEnabled(false);
      }else{
       prePageBtn.setEnabled(true);
    nextPageBtn.setEnabled(true);
   }
}

private void updataPage()
    {
      List<AgencyApproval> list=DataCenter.getCurrentApproval();
   int size=list.size();
   adapter.setList(list.subList(pageIndex*viewCount,pageIndex*viewCount+viewCount));
   adapter.notifyDataSetChanged();
   checkButton(size);
    }

}

package com.ishow.kinmet.ui.adapter;

import java.util.List;

public abstract class SimpleListAdapter<T> extends BaseAdapter {

protected List<T> list;

public SimpleListAdapter() {
super();
}

public SimpleListAdapter(List<T> list) {
super();
this.list = list;
}

@Override
public int getCount() {
  if (list == null) {
   return 0;
  }
    return 10;//就是一页要显示的记录条数
}

@Override
public T getItem(int position) {
  if (list == null || position < 0 || position >= list.size()) {
   return null;
  }
  return list.get(position);
}

public int getPosition(T item) {
return list.indexOf(item);
}

@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}

public List<T> getList() {
return list;
}

public void remove(T obj){
  list.remove(obj);
  notifyDataSetChanged();
}

public void setList(List<T> list) {
  this.list = list;
  notifyDataSetChanged();
}

}

下面是main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
style="@style/default_width_height_fill_white_background"
android:orientation="vertical" >