Android分页中显示出下面翻页的导航栏的布局实例代码

 package com.ldw.safe.Activity; import java.util.List; import android.app.Activity; import android.content.Context; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.text.TextUtils; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Adapter; import android.widget.EditText; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import com.ldw.safe.R; import com.ldw.safe.adapter.MyBaseAdapter; import com.ldw.safe.bean.BlackNumberInfo; import com.ldw.safe.db.dao.BlackNumberDao; public class CallSafeActivity extends Activity { private ListView list_view_callsafe; private List blackNumberInfos; private LinearLayout ll_pb; private BlackNumberDao dao; private TextView tv_page_number; private int pageNumber; private int mPageSize = 20;//每一页显示多少数据 private int mCurrentPageNumber = 0;//当前页面 private int totalPage; private CallSafeAdapter adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_call_safe); initUi(); initData(); } //初始化数据 private Handler handler = new Handler(){ @Override public void handleMessage(Message msg) { //通过总数，和每页显示多少条显示有多少条数据 tv_page_number.setText(mCurrentPageNumber + "/" + totalPage); //数据初始化结束，关闭家在全的展示 ll_pb.setVisibility(View.INVISIBLE); adapter = new CallSafeAdapter(blackNumberInfos, CallSafeActivity.this); //配置适配器 list_view_callsafe.setAdapter(adapter); } }; private EditText et_page_number; //初始化数据 private void initData() { //防止阻塞主线程，在子线程中初始化数据（后期数据会很多） new Thread(){ @Override public void run(){ dao = new BlackNumberDao(CallSafeActivity.this); //获取到总条数和页数 totalPage = dao.getTotalNumber() / mPageSize; //获取到表的所有数据 //blackNumberInfos = dao.findAll(); //分页显示数据 blackNumberInfos = dao.findPar(mCurrentPageNumber, mPageSize); handler.sendEmptyMessage(0); } }.start(); } //初始化UI private void initUi() { ll_pb = (LinearLayout) findViewById(R.id.ll_pb); //初始化的时候展示加载的圆圈 ll_pb.setVisibility(View.VISIBLE); list_view_callsafe = (ListView) findViewById(R.id.list_view_callsafe); tv_page_number = (TextView) findViewById(R.id.tv_page_number); et_page_number = (EditText) findViewById(R.id.et_page_number); } //对代码进行优化，继承自定义MyBaseAdapter，MyBaseAdapter继承自BaseAdapter封装一些常用的方法 private class CallSafeAdapter extends MyBaseAdapter{ private CallSafeAdapter(List lists, Context mContext){ super(lists, mContext); } @Override public View getView(int position, View convertView, ViewGroup parent) { //谷歌推出的优化方案 ViewHolder holder; if(convertView == null){ convertView = View.inflate(CallSafeActivity.this, R.layout.item_call_safe, null); holder = new ViewHolder(); holder.tv_number = (TextView) convertView.findViewById(R.id.tv_number); holder.tv_mode = (TextView) convertView.findViewById(R.id.tv_mode); holder.iv_delete = (ImageView) convertView.findViewById(R.id.iv_delete); convertView.setTag(holder); }else{ holder = (ViewHolder) convertView.getTag(); } holder.tv_number.setText(lists.get(position).getNumber()); String mode = lists.get(position).getMode(); if(mode.equals("1")){ holder.tv_mode.setText("电话和短信拦截"); }else if(mode.equals("2")){ holder.tv_mode.setText("电话拦截"); }else if(mode.equals("3")){ holder.tv_mode.setText("短信拦截"); } final BlackNumberInfo info = lists.get(position); //监听删除数据按钮，删除数据 holder.iv_delete.setOnClickListener(new OnClickListener(){ @Override public void onClick(View v) { String number = info.getNumber(); boolean result = dao.delete(number); if(result){ Toast.makeText(CallSafeActivity.this, "删除成功", Toast.LENGTH_SHORT).show(); lists.remove(info); //更新ListView adapter.notifyDataSetChanged(); }else{ Toast.makeText(CallSafeActivity.this, "删除失败", Toast.LENGTH_SHORT).show(); } } }); return convertView; /* //谷歌推出的优化方案 ViewHolder holder; if(convertView == null){ convertView = View.inflate(CallSafeActivity.this, R.layout.item_call_safe, null); holder = new ViewHolder(); holder.tv_number = (TextView) convertView.findViewById(R.id.tv_number); holder.tv_mode = (TextView) convertView.findViewById(R.id.tv_mode); convertView.setTag(holder); }else{ holder = (ViewHolder) convertView.getTag(); } holder.tv_number.setText(blackNumberInfos.get(position).getNumber()); String mode = blackNumberInfos.get(position).getMode(); if(mode.equals("1")){ holder.tv_mode.setText("电话和短信拦截"); }else if(mode.equals("2")){ holder.tv_mode.setText("电话拦截"); }else if(mode.equals("3")){ holder.tv_mode.setText("短信拦截"); } return convertView; */ /*初步的优化 convertView = View.inflate(CallSafeActivity.this, R.layout.item_call_safe, null); TextView tv_number = (TextView) convertView.findViewById(R.id.tv_number); TextView tv_mode = (TextView) convertView.findViewById(R.id.tv_mode); tv_number.setText(blackNumberInfos.get(position).getNumber()); String mode = blackNumberInfos.get(position).getMode(); if(mode.equals("1")){ tv_mode.setText("电话和短信拦截"); }else if(mode.equals("2")){ tv_mode.setText("电话拦截"); }else if(mode.equals("3")){ tv_mode.setText("短信拦截"); } return convertView; */ /*传统的方式 View view = View.inflate(CallSafeActivity.this, R.layout.item_call_safe, null); TextView tv_number = (TextView) view.findViewById(R.id.tv_number); TextView tv_mode = (TextView) view.findViewById(R.id.tv_mode); tv_number.setText(blackNumberInfos.get(position).getNumber()); String mode = blackNumberInfos.get(position).getMode(); if(mode.equals("1")){ tv_mode.setText("电话和短信拦截"); }else if(mode.equals("2")){ tv_mode.setText("电话拦截"); }else if(mode.equals("3")){ tv_mode.setText("短信拦截"); } return view; */ } } static class ViewHolder{ TextView tv_number; TextView tv_mode; ImageView iv_delete; } /* * 上一页 */ public void prePage(View v){ //页码不能超过范围 if(mCurrentPageNumber <= 0){ Toast.makeText(this, "这已经是第一页", Toast.LENGTH_SHORT).show(); return; } mCurrentPageNumber --; initData(); } /* * 下一页 */ public void nextPage(View v){ //页码不能超过范围 if(mCurrentPageNumber >= totalPage - 1){ Toast.makeText(this, "这已经是最后一页", Toast.LENGTH_SHORT).show(); return; } mCurrentPageNumber ++; initData(); } /* * 跳转页面 */ public void jump(View v){ String jump_page = et_page_number.getText().toString(); if(TextUtils.isEmpty(jump_page)){ Toast.makeText(this, "请输入正确的页码", Toast.LENGTH_SHORT).show(); }else{ //读取的字符串转换成int int pageNumber = Integer.parseInt(jump_page); if(pageNumber >=0 && pageNumber<= totalPage - 1){ mCurrentPageNumber = pageNumber; initData(); }else{ Toast.makeText(this, "请输入正确的页码", Toast.LENGTH_SHORT).show(); } } } }