Android ListView分页简单实现

public class LoadListView extends ListView implements AbsListView.OnScrollListener{  private LayoutInflater mInflater;  //判断是否滚动最后一行  private boolean isLastRow = false;  //底部View布局  private View mFooter;  //实现接口加载更多数据  public OnLoadMoreListener moreListener;  public void setLoadMoreListener(OnLoadMoreListener moreListener){    this.moreListener = moreListener;  }  public LoadListView(Context context) {    super(context);    initView();  }  public LoadListView(Context context, AttributeSet attrs) {    super(context, attrs);    initView();  }  public LoadListView(Context context, AttributeSet attrs, int defStyleAttr) {    super(context, attrs, defStyleAttr);    initView();  }  private void initView(){    mInflater = LayoutInflater.from(getContext());    mFooter = mInflater.inflate(R.layout.    listview_footer,null);    this.addFooterView(mFooter);    mFooter.setVisibility(View.GONE);    setOnScrollListener(this);  }  @Override  public void onScrollStateChanged(AbsListView absListView, int scrollState) {    //正在滚动时回调，回调2-3次，手指没抛则回调2次。scrollState = 2的这次不回调    //回调顺序如下    //第1次：scrollState = SCROLL_STATE_TOUCH_SCROLL(1) 正在滚动    //第2次：scrollState = SCROLL_STATE_FLING(2) 手指做了抛的动作（手指离开屏幕前，用力滑了一下）    //第3次：scrollState = SCROLL_STATE_IDLE(0) 停止滚动    //当屏幕停止滚动时为0；当屏幕滚动且用户使用的触碰或手指还在屏幕上时为1；    //由于用户的操作，屏幕产生惯性滑动时为2    //当滚到最后一行且停止滚动时，执行加载     if(isLastRow&&scrollState== OnScrollListener.SCROLL_STATE_IDLE){      mFooter.setVisibility(View.VISIBLE);      isLastRow = false;      if(moreListener!=null){        moreListener.loadMore();      }    }  }  @Override  public void onScroll(AbsListView absListView, int firstVisibleItem,             int visibleItemCount, int totalItemCount) {    //滚动时一直回调，直到停止滚动时才停止回调。单击时回调一次。    //firstVisibleItem：当前能看见的第一个列表项ID（从0开始）    //visibleItemCount：当前能看见的列表项个数（小半个也算）    //totalItemCount：列表项共数    //判断是否滚到最后一行    if (firstVisibleItem + visibleItemCount == totalItemCount && totalItemCount > 0) {      isLastRow = true;    }  }  public interface OnLoadMoreListener{    void loadMore();  }}

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:orientation="vertical">  <ProgressBar    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_toLeftOf="@+id/id_loadmore"    android:layout_marginRight="5dp" />  <TextView    android:id="@+id/id_loadmore"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="加载更多"    android:layout_centerHorizontal="true"    android:layout_centerVertical="true"/></RelativeLayout>

public class MainActivity extends Activity implements LoadListView.OnLoadMoreListener {  private List<News> list = new ArrayList<>() ;  private loadAdapter mAdapter;  private LoadListView mListView;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    loadMoreData();    mListView =(LoadListView) findViewById(R.id.id_list_view);    mAdapter = new loadAdapter(this,list);    mListView.setAdapter(mAdapter);    mListView.setLoadMoreListener(this);  }  private void loadMoreData(){    for(int i = 0 ; i <10;i++){      News news = new News();      news.setTitle("许巍");      news.setContent("蓝莲花");      list.add(news);    }  }  @Override  public void loadMore() {    new Handler().postDelayed(new Runnable() {      @Override      public void run() {        loadMoreData();        showLoadMore();      }    },2000);  }  private void showLoadMore(){    mAdapter.notifyDataSetChanged();  }}

public class loadAdapter extends BaseAdapter {  private List<News> list;  private Context mContext;  public loadAdapter(Context context,List<News> list){    this.list = list;    this.mContext = context;  }  @Override  public int getCount() {    return list.size();  }  @Override  public Object getItem(int position) {    return position;  }  @Override  public long getItemId(int position) {    return position;  }  @Override  public View getView(int position, View convertView, ViewGroup parent) {    ViewHolder viewHolder;    if(convertView==null){      viewHolder = new ViewHolder();      convertView = LayoutInflater.from(mContext).inflate(R.layout.item_news,null);      viewHolder.title = (TextView) convertView.findViewById(R.id.id_title);      viewHolder.content = (TextView)convertView.findViewById(R.id.id_content);      convertView.setTag(viewHolder);    }else {      viewHolder = (ViewHolder) convertView.getTag();    }    viewHolder.title.setText(list.get(position).getTitle());    viewHolder.content.setText(list.get(position).getContent());    return convertView;  }  public class ViewHolder{    private TextView title;    private TextView content;  }}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent">  <view.LoadListView    android:layout_width="match_parent"    android:layout_height="match_parent"    android:id="@+id/id_list_view"    /></LinearLayout>

<?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  android:id="@+id/id_title"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:text=""  android:gravity="center"  android:padding="5dp"/>  <TextView    android:id="@+id/id_content"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:text=""    android:gravity="center"    android:padding="5dp"/></LinearLayout>