<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical" >  <TextView  style="@style/TitleStyle"   android:text="黑名單管理"    />  <FrameLayout     android:layout_width="match_parent"   android:layout_height="match_parent"   android:layout_weight="11"    >    <LinearLayout       android:id="@+id/ll_pb"      android:layout_width="match_parent"    android:layout_height="wrap_content"    android:gravity="center"    android:visibility="invisible"    android:orientation="vertical"    >    <ProgressBar      android:layout_width="wrap_content"    android:layout_height="wrap_content"      />    <TextView       android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="玩命加載中..."      />    </LinearLayout>   <include      android:id="@+id/list_view_callsafe"     layout="@layout/list_view_callsafe"/>  </FrameLayout>  <LinearLayout     android:layout_width="match_parent"   android:layout_height="wrap_content"   android:orientation="horizontal"    >    <Button       android:onClick="prePage"      android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="上一頁"    android:layout_weight="1"      /> <Button       android:onClick="nextPage"      android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="下一頁"    android:layout_weight="1"      />  <Button       android:onClick="jump"      android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="跳轉"    android:layout_weight="1"      />      <EditText       android:id="@+id/et_page_number"      android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_weight="1"       />     <TextView       android:id="@+id/tv_page_number"      android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="0/12"    android:textSize="20sp"    android:layout_weight="1"       />           </LinearLayout></LinearLayout>

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<BlackNumberInfo> blackNumberInfos; private LinearLayout ll_pb; private BlackNumberDao dao; private TextView tv_page_number; private int pageNumber; private int mPageSize = 20;//每一頁顯示多少數據 private int mCurrentPageNumber = 0;//當前頁面 private int totalPage; private CallSafeAdapter adapter; @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_call_safe);    initUi();    initData(); } //初始化數據 private Handler handler = new Handler(){ @Override    public void handleMessage(Message msg) {  //通過總數，和每頁顯示多少條顯示有多少條數據  tv_page_number.setText(mCurrentPageNumber + "/" + totalPage);  //數據初始化結束，關閉家在全的展示  ll_pb.setVisibility(View.INVISIBLE);  adapter = new CallSafeAdapter(blackNumberInfos, CallSafeActivity.this);  //配置適配器  list_view_callsafe.setAdapter(adapter); } }; private EditText et_page_number; //初始化數據 private void initData() { //防止阻塞主線程，在子線程中初始化數據（后期數據會很多） new Thread(){  @Override  public void run(){  dao = new BlackNumberDao(CallSafeActivity.this);  //獲取到總條數和頁數  totalPage = dao.getTotalNumber() / mPageSize;  //獲取到表的所有數據  //blackNumberInfos = dao.findAll();  //分頁顯示數據  blackNumberInfos = dao.findPar(mCurrentPageNumber, mPageSize);  handler.sendEmptyMessage(0);  } }.start(); } //初始化UI private void initUi() { ll_pb = (LinearLayout) findViewById(R.id.ll_pb);    //初始化的時候展示加載的圓圈    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); } //對代碼進行優化，繼承自定義MyBaseAdapter，MyBaseAdapter繼承自BaseAdapter封裝一些常用的方法 private class CallSafeAdapter extends MyBaseAdapter<BlackNumberInfo>{ private CallSafeAdapter(List lists, Context mContext){  super(lists, mContext); } @Override public View getView(int position, View convertView, ViewGroup parent) {  //谷歌推出的優化方案  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("電話和短信攔截");  }else if(mode.equals("2")){  holder.tv_mode.setText("電話攔截");  }else if(mode.equals("3")){  holder.tv_mode.setText("短信攔截");  }  final BlackNumberInfo info = lists.get(position);  //監聽刪除數據按鈕，刪除數據  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, "刪除成功", Toast.LENGTH_SHORT).show();   lists.remove(info);   //更新ListView   adapter.notifyDataSetChanged();   }else{   Toast.makeText(CallSafeActivity.this, "刪除失敗", Toast.LENGTH_SHORT).show();   }  }  });  return convertView;  /*  //谷歌推出的優化方案  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("電話和短信攔截");  }else if(mode.equals("2")){  holder.tv_mode.setText("電話攔截");  }else if(mode.equals("3")){  holder.tv_mode.setText("短信攔截");  }  return convertView;  */  /*初步的優化  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("電話和短信攔截");  }else if(mode.equals("2")){  tv_mode.setText("電話攔截");  }else if(mode.equals("3")){  tv_mode.setText("短信攔截");  }  return convertView;  */  /*傳統的方式  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("電話和短信攔截");  }else if(mode.equals("2")){  tv_mode.setText("電話攔截");  }else if(mode.equals("3")){  tv_mode.setText("短信攔截");  }  return view;  */ }  } static class ViewHolder{ TextView tv_number; TextView tv_mode; ImageView iv_delete; } /* * 上一頁 */ public void prePage(View v){ //頁碼不能超過范圍 if(mCurrentPageNumber <= 0){  Toast.makeText(this, "這已經是第一頁", Toast.LENGTH_SHORT).show();  return; } mCurrentPageNumber --; initData(); } /* * 下一頁 */ public void nextPage(View v){ //頁碼不能超過范圍 if(mCurrentPageNumber >= totalPage - 1){  Toast.makeText(this, "這已經是最后一頁", Toast.LENGTH_SHORT).show();  return; } mCurrentPageNumber ++; initData(); } /* * 跳轉頁面 */ public void jump(View v){ String jump_page = et_page_number.getText().toString(); if(TextUtils.isEmpty(jump_page)){  Toast.makeText(this, "請輸入正確的頁碼", Toast.LENGTH_SHORT).show(); }else{  //讀取的字符串轉換成int  int pageNumber = Integer.parseInt(jump_page);  if(pageNumber >=0 && pageNumber<= totalPage - 1){  mCurrentPageNumber = pageNumber;  initData();  }else{  Toast.makeText(this, "請輸入正確的頁碼", Toast.LENGTH_SHORT).show();  } } }}