宜宾网站建设公司

如何将Android应用中导航栏在分页中显示

今天就跟大家聊聊有关如何将Android应用中导航栏在分页中显示，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。

创新互联企业建站,10余年网站建设经验，专注于网站建设技术，精于网页设计，有多年建站和网站代运营经验，设计师为客户打造网络企业风格，提供周到的建站售前咨询和贴心的售后服务。对于网站设计制作、网站设计中不同领域进行深入了解和探索，创新互联在网站建设中充分了解客户行业的需求，以灵动的思维在网页中充分展现，通过对客户行业精准市场调研，为客户提供的解决方案。

当页面条目过多的时候需要分页，要在布局中显示出分页的相关布局，使用android:layout_weight="11"

activity_call_safe.xml

<?xml version="1.0" encoding="utf-8"?>

逻辑文件，实现分页显示，页面的跳转，页数的显示，数据的删除同时更新ListView

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();
  }
 }
 }
}

看完上述内容，你们对如何将Android应用中导航栏在分页中显示有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注创新互联行业资讯频道，感谢大家的支持。


当前题目：如何将Android应用中导航栏在分页中显示
转载来于：http://ybzwz.com/article/jopcjg.html

其他资讯