1.实现分页最主要的就是封装分页代码，然后在按钮里实现相关的操作
/**
* 分页工具
*
* @Project App_Page
* @Package com.android.dividepage
* @author chenlin
* @version 1.0
* @Date 2012年6月2日
* @Note TODO
* @param <T>
*/
public class PageHelper<T> {
private List<T> allData; // 所有数据
private int perPage = 10; // 每页条目
private int currentPage = 1;// 当前页
private int pageNum = 1; // 页码
private List<T> childData;// 子数据
private int allNum;// 总共条目
public PageHelper(List<T> datas, int perPage) {
this.allData = datas;
if (perPage > 0)
this.perPage = perPage;
// 如果数据大于10条
if (allData != null && allData.size() > perPage) {
childData = allData.subList(0, perPage - 1);
}
allNum = allData.size();
// 如果总数能除断perPage，页数就是余数，否则+1
pageNum = allNum % perPage == 0 ? (allNum / perPage) : (allNum / perPage + 1);
}
public int getCount() {
return this.allNum;
}
public int getCurrentPage() {
return this.currentPage;
}
public int getPageNum() {
return this.pageNum;
}
public int getPerPage() {
return this.perPage;
}
public void gotoPage(int n) { // 页面跳转
currentPage = n > pageNum ? pageNum : (n < 1 ? 1 : n);
}
public boolean hasNextPage() {// 是否有下一页
return currentPage < pageNum;
}
public boolean hasPrePage() {// 是否有前一页
return currentPage > 1;
}
public void headPage() {// 第一页
currentPage = 1;
}
public void lastPage() {// 最后一页
currentPage = pageNum;
}
public void nextPage() {// 下一页
currentPage = hasNextPage() ? currentPage + 1 : pageNum;
}
public void prePage() {// 前一页
currentPage = hasPrePage() ? currentPage - 1 : 1;
}
public void setPerPage(int perPage) {// 设置上一页面
this.perPage = perPage;
}
/**
* 获得当前数据
* @return
*/
public List<T> currentList() {
if (currentPage == 1) {
childData = allData.subList(0, perPage);
} else if (currentPage == pageNum) {
childData = allData.subList(perPage * (pageNum - 1), allNum);
} else {
childData = allData.subList(perPage * (currentPage - 1), perPage * currentPage);
}
return childData;
}
public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}
}2、主页里我根据tab标签把按钮设置进去，然后在click里方法读取，最后根据tag标签就可判断是哪个按钮点击了
/**
* 分页主页
* @Project App_Page
* @Package com.android.dividepage
* @author chenlin
* @version 1.0
* @Date 2012年6月2日
* @Note TODO
*/
public class MainActivity extends Activity implements OnClickListener {
private ListView mListView;
//分页按钮
private Button mBtnPrePage, mBtnNextPage, mBtnPreItem, mBtnNextItem;
//显示分页信息
private TextView mTvPageNo;
//数据实现
private PageHelper<String> mPageDaoImpl;
private DataAdapter mAdapter;
private List<String> mDatas;
//被选着的索引
private int selectIndex = 0;
private static final int PREPAGE = 0;
private static final int NEXTPAGE = 1;
private static final int PREITEM = 2;
private static final int NEXTITEM = 3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initViews();
initDatas();
}
private void initDatas() {
//从资源文件里读数据
mDatas = Arrays.asList(getResources().getStringArray(R.array.channellist));
//每次读8条数据
mPageDaoImpl = new PageHelper<String>(mDatas, 8);
mAdapter = new DataAdapter(this, mPageDaoImpl.currentList());
mListView.setAdapter(mAdapter);
//设置当前页码与总页码
mTvPageNo.setText(mPageDaoImpl.getCurrentPage() + " / " + mPageDaoImpl.getPageNum());
}
private void initViews() {
mListView = (ListView) findViewById(R.id.page_list);
mBtnPrePage = (Button) findViewById(R.id.pre_page);
mBtnPrePage.setTag(PREPAGE);
mBtnPrePage.setOnClickListener(this);
mBtnNextPage = (Button) findViewById(R.id.next_page);
mBtnNextPage.setTag(NEXTPAGE);
mBtnNextPage.setOnClickListener(this);
mBtnPreItem = (Button) findViewById(R.id.pre_item);
mBtnPreItem.setTag(PREITEM);
mBtnPreItem.setOnClickListener(this);
mBtnNextItem = (Button) findViewById(R.id.next_item);
mBtnNextItem.setTag(NEXTITEM);
mBtnNextItem.setOnClickListener(this);
mTvPageNo = (TextView) findViewById(R.id.pagenum);
}
@Override
public void onClick(View v) {
final int flag = (Integer) v.getTag();
switch (flag) {
case PREPAGE:// 首页
headPage();
break;
case NEXTPAGE:// 尾页
lastPage();
break;
case PREITEM:// 上一条
prePage();
break;
case NEXTITEM:// 下一条
nextPage();
break;
}
}
private void prePage() {
if (selectIndex == 0) {
if (mPageDaoImpl.getCurrentPage() >= 1) {
mPageDaoImpl.prePage();
}
mAdapter.setData(mPageDaoImpl.currentList());
mListView.setSelection(mAdapter.getCount() - 1);
mTvPageNo.setText(mPageDaoImpl.getCurrentPage() + " / " + mPageDaoImpl.getPageNum());
} else {
return;
}
}
private void nextPage() {
if (mPageDaoImpl.getCurrentPage() <= mPageDaoImpl.getPageNum()) {
mPageDaoImpl.nextPage();
}
mAdapter.setData(mPageDaoImpl.currentList());
mListView.setSelection(0);
mTvPageNo.setText(mPageDaoImpl.getCurrentPage() + " / " + mPageDaoImpl.getPageNum());
}
private void lastPage() {
if (mPageDaoImpl.getCurrentPage() != mPageDaoImpl.getPageNum()) {
mPageDaoImpl.lastPage();
}
mAdapter.setData(mPageDaoImpl.currentList());
mTvPageNo.setText(mPageDaoImpl.getCurrentPage() + " / " + mPageDaoImpl.getPageNum());
}
private void headPage() {
if (mPageDaoImpl.getCurrentPage() != 1) {
mPageDaoImpl.headPage();
}
mAdapter.setData(mPageDaoImpl.currentList());
mTvPageNo.setText(mPageDaoImpl.getCurrentPage() + " / " + mPageDaoImpl.getPageNum());
}
}3、适配器代码，太简单了，我就不说了
public class DataAdapter extends BaseAdapter {
private Context mContext;
private List<String> mDatas;
public DataAdapter(Context context, List<String> datas) {
this.mContext = context;
this.mDatas = datas;
}
@Override
public int getCount() {
return mDatas == null ? 0 : mDatas.size();
}
@Override
public Object getItem(int position) {
return mDatas == null ? null : mDatas.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder mHolder;
if (convertView == null) {
convertView = LayoutInflater.from(mContext).inflate(R.layout.channel_item, parent, false);
mHolder = new ViewHolder();
mHolder.nameView = (TextView) convertView.findViewById(R.id.channel_name);
convertView.setTag(mHolder);
}
mHolder = (ViewHolder) convertView.getTag();
mHolder.nameView.setText(mDatas.get(position));
return convertView;
}
static class ViewHolder {
public TextView nameView;
}
public void setData(List<String> datas) {
mDatas = datas;
notifyDataSetChanged();
}
}4、代码下载
链接：http://pan.baidu.com/s/1kVuAUKf 密码：lgg6
