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本文实例为大家分享了android recyclerview使用的具体代码,供大家参考,具体内容如下
package com.itheima74.recyclerview; import android.os.bundle; import android.support.v7.app.appcompatactivity; import android.support.v7.widget.gridlayoutmanager; import android.support.v7.widget.recyclerview; import android.view.view; import android.view.viewgroup; import android.widget.imageview; import android.widget.textview; import java.util.arraylist; /** * recyclerview * 1.增强版的listview * 2.官方推荐 * 3.使用步骤: * a.build.gradle文件中添加依赖compile 'com.android.support:recyclerview-v7:25.2.0' * b.xml布局中引入,注意完整包名+类名 * c.具体见代码 */ public class mainactivity extends appcompatactivity { arraylist<fruit> mfruitlist; private recyclerview recyclerview; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); initview(); initdata(); initadapter(); } /** * 初始化数据适配器 */ private void initadapter() { recyclerview.setadapter(new fruitadapter()); } /** * 初始化控件 */ private void initview() { recyclerview = (recyclerview) findviewbyid(r.id.recyclerview); // 设置为linearlayoutmanager布局方式,线性布局 // linearlayoutmanager layoutmanager = new linearlayoutmanager(this); // 两种方式,水平或垂直排布,默认垂直排布 // layoutmanager.setorientation(linearlayoutmanager.horizontal); // recyclerview.setlayoutmanager(layoutmanager); // 设置为gridlayoutmanager布局方式,3列排布 gridlayoutmanager gridlayoutmanager = new gridlayoutmanager(this,3); recyclerview.setlayoutmanager(gridlayoutmanager); } /** * 初始化数据,水果集合 */ private void initdata() { mfruitlist = new arraylist<>(); mfruitlist.add(new fruit("apple", r.drawable.apple_pic)); mfruitlist.add(new fruit("banana", r.drawable.banana_pic)); mfruitlist.add(new fruit("cherry", r.drawable.cherry_pic)); mfruitlist.add(new fruit("grape", r.drawable.grape_pic)); mfruitlist.add(new fruit("mango", r.drawable.mango_pic)); mfruitlist.add(new fruit("orange", r.drawable.orange_pic)); mfruitlist.add(new fruit("pear", r.drawable.pear_pic)); mfruitlist.add(new fruit("pineapple", r.drawable.pineapple_pic)); mfruitlist.add(new fruit("strawberry", r.drawable.strawberry_pic)); mfruitlist.add(new fruit("watermelon", r.drawable.watermelon_pic)); } class fruitadapter extends recyclerview.adapter<viewholder> { // 返回viewholder对象 @override public viewholder oncreateviewholder(viewgroup parent, int viewtype) { return new viewholder(view.inflate(getapplicationcontext(), r.layout.listview_item, null)); } // 刷新界面,为viewholder两个属性设置内容 @override public void onbindviewholder(viewholder holder, int position) { fruit fruit = mfruitlist.get(position); holder.iv.setimageresource(fruit.imageid); holder.tv.settext(fruit.name); } @override public int getitemcount() { // fruitadapter是mainactivity的内部类,可以直接使用外部类的成员变量 return mfruitlist.size(); } } static class viewholder extends recyclerview.viewholder { imageview iv; textview tv; viewholder(view itemview) { super(itemview); iv = (imageview) itemview.findviewbyid(r.id.iv); tv = (textview) itemview.findviewbyid(r.id.tv); } } }
package com.itheima74.recyclerview; /** * created by my on 2017/3/2. */ class fruit { string name; int imageid; fruit(string name, int imageid) { this.name = name; this.imageid = imageid; } }
效果图:
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