<?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" >  <RelativeLayout     android:layout_width="match_parent"   android:layout_height="wrap_content"    >    <TextView  style="@style/TitleStyle"   android:text="黑名單管理"    />    <Button       android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_alignParentRight="true"    android:text="添加"      />  </RelativeLayout>  <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>邏輯文件，實現(xiàn)頁面的分頁顯示，監(jiān)聽ListView的滑動事件，滑動的時候就更新數(shù)據(jù)

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.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.AbsListView.OnScrollListener;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 CallSafeAdapter adapter; private int totalNumber;//總的條數(shù) private int mStartIndex = 0;//開始加載的位置 private int maxCount = 20;//每頁加載多少數(shù)據(jù) @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_call_safe2);    initUi();    initData(); } //初始化數(shù)據(jù) private Handler handler = new Handler(){ @Override    public void handleMessage(Message msg) {  //數(shù)據(jù)初始化結(jié)束，關(guān)閉家在全的展示  ll_pb.setVisibility(View.INVISIBLE);  //防止適配器一直刷新  if(adapter == null){  adapter = new CallSafeAdapter(blackNumberInfos, CallSafeActivity.this);  //配置適配器  list_view_callsafe.setAdapter(adapter);  }else{   adapter.notifyDataSetChanged();  } } }; private EditText et_page_number; //初始化數(shù)據(jù) private void initData() { //防止阻塞主線程，在子線程中初始化數(shù)據(jù)（后期數(shù)據(jù)會很多） new Thread(){  @Override  public void run(){  dao = new BlackNumberDao(CallSafeActivity.this);   //一共有多少條數(shù)據(jù)     totalNumber = dao.getTotalNumber();  //分批加載數(shù)據(jù)     if(blackNumberInfos == null){      //第一次加載      blackNumberInfos = dao.findPar2(mStartIndex, maxCount);     }else{      //把后面的數(shù)據(jù)。追加到blackNumberInfos集合里面。防止黑名單被覆蓋      blackNumberInfos.addAll(dao.findPar2(mStartIndex, maxCount));     }  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); //設(shè)置listView的滾動監(jiān)聽器 list_view_callsafe.setOnScrollListener(new OnScrollListener(){      //狀態(tài)改變時候回調(diào)的方法      /*       * @param scrollState 表示滾動的狀態(tài)       *AbsListView.OnScrollListener.SCROLL_STATE_IDLE 閑置狀態(tài)       *AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL 手指觸摸的時候的狀態(tài)       *AbsListView.OnScrollListener.SCROLL_STATE_FLING 慣性       */  @Override  public void onScrollStateChanged(AbsListView view, int scrollState) {        switch (scrollState) {        case AbsListView.OnScrollListener.SCROLL_STATE_IDLE:          //獲取到最后一條顯示的數(shù)據(jù)條數(shù)          int lastVisiblePosition = list_view_callsafe.getLastVisiblePosition();          System.out.println("lastVisiblePosition==========" + lastVisiblePosition);            if(lastVisiblePosition == blackNumberInfos.size() - 1){//判斷最后一個數(shù)據(jù)是不是每頁顯示的數(shù)據(jù)-1              // 加載更多的數(shù)據(jù)。 更改加載數(shù)據(jù)的開始位置              mStartIndex += maxCount;              if (mStartIndex >= totalNumber) {                Toast.makeText(getApplicationContext(),                    "沒有更多的數(shù)據(jù)了。", Toast.LENGTH_SHORT).show();                return;              }              initData();            }          break;      }  }  //listview滾動的時候調(diào)用的方法      //時時調(diào)用。當我們的手指觸摸的屏幕的時候就調(diào)用  @Override  public void onScroll(AbsListView view, int firstVisibleItem,   int visibleItemCount, int totalItemCount) {  // TODO Auto-generated method stub  } }); } //對代碼進行優(yōu)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(yōu)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(jiān)聽刪除數(shù)據(jù)按鈕，刪除數(shù)據(jù)  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(yōu)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(yōu)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(tǒng)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; }}