Android--开发--ListView上下翻页效果.rar

package com.test; import java.util.ArrayList; import android.app.Activity; import android.graphics.Color; import android.os.Bundle; import android.view.View; import android.view.ViewGroup; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.BaseAdapter; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import android.widget.AdapterView.OnItemClickListener; import android.widget.AdapterView.OnItemLongClickListener; import android.widget.CompoundButton.OnCheckedChangeListener; public class Main extends Activity { private ListView listView; private TextView preTextView, nextTextView, total, current; //定义点击事件 private OnClickListener cl; //定义适配器 private ListAdapter listadpter; //定义每一页显示行数 private int VIEW_COUNT = 5; //定义的页数 private int index = 0; //泛型集合ArrayList private ArrayList<Students> arrayList = new ArrayList<Students>(); //数据操作的dao类 StudentsDAO dao = new StudentsDAO(Main.this); //实体bean Students students = new Students(); // 标记：上次的ID int last = 0; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //初始化界面 initView(); //调用dao里面的insert()方法 dao.insert(); //调用dao里面的selectAll()方法 arrayList = dao.selectAll(); //实例化适配器 listadpter = new ListAdapter(Main.this); //填充适配器 listView.setAdapter(listadpter); //监听机制 cl = new TextView.OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { //如果是上一页textview的时候，调用上一页的方法 case R.id.txPreview: preView(); break; case R.id.txNext: nextView(); break; default: break; } } }; //Item点击事件 listView.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // TODO Auto-generated method stub // 重置上次颜色为Color.WHITE setLastColorBlack(); LinearLayout lLayout = (LinearLayout) view; TextView lText = (TextView) lLayout.getChildAt(1); lText.setTextColor(Color.RED); // 保存最新的上次ID last = position; final int pos = position; Toast.makeText( Main.this, "This is " + index + " page,is the " + String.valueOf(pos + 1) + " row,current date is " + arrayList.get(pos + index * VIEW_COUNT).getName(), Toast.LENGTH_SHORT) .show(); } }); //Item长按事件 listView.setOnItemLongClickListener(new OnItemLongClickListener() { public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { // TODO Auto-generated method stub // 重置上次颜色为Color.WHITE setLastColorBlack(); LinearLayout lLayout = (LinearLayout) view; TextView lText = (TextView) lLayout.getChildAt(1); lText.setTextColor(Color.GREEN); // 保存最新的上次ID last = position; final int pos = position; Toast.makeText( Main.this, "This is " + index + " page,is the " + String.valueOf(pos + 1) + " row,current date is " + arrayList.get(pos + index * VIEW_COUNT).getName(), Toast.LENGTH_SHORT) .show(); return false; } }); preTextView.setOnClickListener(cl); nextTextView.setOnClickListener(cl); //总页数 total.setText("total:" + String.valueOf(arrayList.size())); //当前页数 current.setText("current:" + String.valueOf(index)); checkView(); } //初始化界面方法 private void initView() { // TODO Auto-generated method stub listView = (ListView) findViewById(R.id.list); preTextView = (TextView) findViewById(R.id.txPreview); nextTextView = (TextView) findViewById(R.id.txNext); total = (TextView) findViewById(R.id.total); current = (TextView) findViewById(R.id.current); } public void setLastColorBlack() { //选中之后的颜色变成白色 LinearLayout lastLayout = (LinearLayout) listView.getChildAt(last); TextView lastText = (TextView) lastLayout.getChildAt(1); lastText.setTextColor(Color.WHITE); } //上一页的方法 private void preView() { // TODO Auto-generated method stub index--; current.setText("current:" + String.valueOf(index)); //重新更新数据 listadpter.notifyDataSetChanged(); checkView(); } //下一页的方法 private void nextView() { // TODO Auto-generated method stub index++; current.setText("current:" + String.valueOf(index)); //重新更新数据 listadpter.notifyDataSetChanged(); checkView(); } //检测是否到了第一页和最后一页 public void checkView() { if (index <= 0) { //如果页数小于0就让preTextView不可见 preTextView.setEnabled(false); if (arrayList.size() <= VIEW_COUNT) { //如果总长度小于VIEW_COUNT就让nextTextView不可见 nextTextView.setEnabled(false); } } else if (arrayList.size() - index * VIEW_COUNT <= VIEW_COUNT) { //当当前数据前进到最后一页的时候就让nextTextView不可见 nextTextView.setEnabled(false); } else { preTextView.setEnabled(true); nextTextView.setEnabled(true); } } //自定义适配器 class ListAdapter extends BaseAdapter { Activity activity; public ListAdapter(Activity activity) { this.activity = activity; } public void notifyDataSetChanged() { // TODO Auto-generated method stub //每次清空数据，重新填充 arrayList.clear(); arrayList = dao.selectAll(); super.notifyDataSetChanged(); } public int getCount() { // TODO Auto-generated method stub if (arrayList.size() - VIEW_COUNT * index < VIEW_COUNT) { return arrayList.size() - VIEW_COUNT * index; } else { return VIEW_COUNT; } } public Object getItem(int position) { // TODO Auto-generated method stub return position; } public long getItemId(int position) { // TODO Auto-generated method stub return position; } public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub ViewHolder holder; if (arrayList != null) { //根据位置来获取数据 students = arrayList.get(position + index * VIEW_COUNT); } if (convertView == null) { convertView = getLayoutInflater().inflate(R.layout.list_item, null); holder = new ViewHolder(); holder.img=(TextView) convertView.findViewById(R.id.img); holder.text = (TextView) convertView.findViewById(R.id.tv); holder.ck = (CheckBox) convertView.findViewById(R.id.ck); //设置标志符 convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } holder.img.setText("ID: "+students.getId()); holder.text.setText("Name: "+students.getName()+"——"+"Age:"+students.getAge()); final int pos = position; //设置TextView点击事件 holder.text.setOnClickListener(new OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub Toast.makeText( Main.this, "This is " + index + " page,is the " + String.valueOf(pos + 1) + " row,current date is " + arrayList.get(pos + index * VIEW_COUNT).getName(), Toast.LENGTH_SHORT) .show(); } }); //设置CheckBox点击事件 holder.ck.setOnCheckedChangeListener(new OnCheckedChangeListener() { public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { // TODO Auto-generated method stub if (isChecked) { Toast.makeText( Main.this, "This is " + index + " page,is the " + String.valueOf(pos + 1) + " row,current date is " + arrayList.get(pos + index * VIEW_COUNT).getName(), Toast.LENGTH_SHORT).show(); } } }); return convertView; } } final class ViewHolder { Te