Android自定义ListView实现分页加载

来源：互联网发布：网络分析软件编辑：程序博客网时间：2024/06/05 07:59

用到分页加载一般在ListView滑动中，思路如下：
1.自定义ListView,并实现OnScrollListener接口

public void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {//当第一个可见Item的位置 + 可见Item的数量 == 所有Item数量时  if(firstVisibleItem + visibleItemCount == totalItemCount){       //1.显示footerView       //2.调用接口通知Activity加载数据  }}

2.在构造函数中，listview添加footerView,绑定滚动监听

public LoadListView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        initView(context);    }    private void initView(Context context) {        footerView = LayoutInflater.from(context).inflate(                R.layout.listview_footer, null);        footerView.findViewById(R.id.load_layout).setVisibility(View.INVISIBLE);        this.addFooterView(footerView);        this.setOnScrollListener(this);        this.setDividerHeight(dividerHeight);    }

3.设一个回调接口，到时候让Activity实现这个接口

// 接口回调    public interface ListViewOnLoaderListener {        void onLoad();    }    public void setListViewOnLoaderListener(            ListViewOnLoaderListener loaderListener) {        this.loaderListener = loaderListener;    }

4.设置一个公共方法，表示完成了加载，让footerView不可见

/**     * 加载完毕     */    public void loadComplete() {        isLoad = false;        footerView.findViewById(R.id.load_layout).setVisibility(View.INVISIBLE);    }

具体的完整的自定义ListView代码在下面

package com.king.mircosoftband.view;import com.king.mircosoftband.R;import com.king.mircosoftband.util.DisplayUtil;import android.content.Context;import android.graphics.Color;import android.graphics.drawable.Drawable;import android.util.AttributeSet;import android.view.LayoutInflater;import android.view.View;import android.widget.AbsListView;import android.widget.AbsListView.OnScrollListener;import android.widget.ListView;public class LoadListView extends ListView implements OnScrollListener {    private boolean isLoad = false;    private ListViewOnLoaderListener loaderListener;    private View footerView;    private int totalItemCount;// 总数量；    private int lastVisibleItem;// 最后一个可见的item；    private int dividerHeight = DisplayUtil.dip2px(getContext(), 8);    public LoadListView(Context context) {        this(context, null);    }    public LoadListView(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public LoadListView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        initView(context);    }    private void initView(Context context) {        footerView = LayoutInflater.from(context).inflate(                R.layout.listview_footer, null);        footerView.findViewById(R.id.load_layout).setVisibility(View.INVISIBLE);        this.addFooterView(footerView);        this.setOnScrollListener(this);        this.setDividerHeight(dividerHeight);    }    @Override    public void onScroll(AbsListView view, int firstVisibleItem,            int visibleItemCount, int totalItemCount) {        this.lastVisibleItem = firstVisibleItem + visibleItemCount;        this.totalItemCount = totalItemCount;    }    @Override    public void onScrollStateChanged(AbsListView view, int scrollState) {        if (lastVisibleItem == totalItemCount) {               if(!isLoad && loaderListener != null ){                   isLoad = true;                   footerView.findViewById(R.id.load_layout).setVisibility(View.VISIBLE);                   loaderListener.onLoad();               }        }    }    /**     * 加载完毕     */    public void loadComplete() {        isLoad = false;        footerView.findViewById(R.id.load_layout).setVisibility(View.INVISIBLE);    }    // 接口回调    public interface ListViewOnLoaderListener {        void onLoad();    }    public void setListViewOnLoaderListener(            ListViewOnLoaderListener loaderListener) {        this.loaderListener = loaderListener;    }}

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