Android编程实现带有图标的ListView并带有长按菜单效果示例

本文实例讲述了android编程实现带有图标的listview并带有长按菜单效果。分享给大家供大家参考，具体如下：

mainactivity.java

package com.zxl;
import java.util.arraylist;
import java.util.list;
import org.w3c.dom.ls.lsexception;
import android.app.activity;
import android.os.bundle;
import android.view.contextmenu;
import android.view.contextmenu.contextmenuinfo;
import android.view.menuitem;
import android.view.view;
import android.widget.adapterview;
import android.widget.adapterview.adaptercontextmenuinfo;
import android.widget.listview;
import android.widget.adapterview.onitemclicklistener;
import android.widget.toast;
public class mainactivity extends activity implements onitemclicklistener {
  /** called when the activity is first created. */
  listview lv;
  list<listviewitem> items;
  customlistviewadapter adapter;
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.main);
    lv=(listview)findviewbyid(r.id.listview1);
    items=new arraylist<mainactivity.listviewitem>();
    items.add(new listviewitem(){{
      thumbnailresource=r.drawable.ic_launcher;
      title="item1";
      subtitle="item1 description";
    }});
    items.add(new listviewitem(){{
      thumbnailresource=r.drawable.ic_launcher;
      title="item2";
      subtitle="item2 description";
    }});
    items.add(new listviewitem(){{
      thumbnailresource=r.drawable.ic_launcher;
      title="item3";
      subtitle="item3 description";
    }});
    items.add(new listviewitem(){{
      thumbnailresource=r.drawable.ic_launcher;
      title="item4";
      subtitle="item4 description";
    }});
    adapter=new customlistviewadapter(this, items);
    lv.setadapter(adapter);
    registerforcontextmenu(lv);
    lv.setonitemclicklistener(this);
  }
  class listviewitem{
    public int thumbnailresource;
    public string title;
    public string subtitle;
  }
  public void onitemclick(adapterview<?> parent, view view, int position, long id) {
    // todo auto-generated method stub
/*   listviewitem item=items.get(position); //删除
    items.remove(item);
    adapter=new customlistviewadapter(this, items);
    lv.setadapter(adapter);*/
    listviewitem item=items.get(position);
    toast.maketext(mainactivity.this, "this is :"+item, toast.length_long).show();
  }
  @override
  public void oncreatecontextmenu(contextmenu menu, view v, contextmenuinfo menuinfo) {
    // todo auto-generated method stub
    super.oncreatecontextmenu(menu, v, menuinfo);
    menu.add("add");
    menu.add("update");
    menu.add("delete");
  }
  @override
  public boolean oncontextitemselected(menuitem item) {
    // todo auto-generated method stub
    super.oncontextitemselected(item);
    if(item.gettitle()=="add"){
      toast.maketext(mainactivity.this, "add", toast.length_long).show();
      items.add(new listviewitem(){{
        thumbnailresource=r.drawable.ic_launcher;
        title="item new";
        subtitle="item new description";
      }});
      adapter=new customlistviewadapter(this, items);
      lv.setadapter(adapter);
    }
    else if(item.gettitle()=="update"){
      //do somthing
    }
    else if(item.gettitle()=="delete"){
      contextmenuinfo info = item.getmenuinfo();
      adapterview.adaptercontextmenuinfo contextmenuinfo = (adaptercontextmenuinfo) info;
       // 获取选中行位置
      int position = contextmenuinfo.position;
      listviewitem itema=items.get(position);
      items.remove(itema);
      adapter=new customlistviewadapter(this, items);
      lv.setadapter(adapter);
    }
    return true;
  }
}

customlistviewadapter.java

package com.zxl;
import java.util.list;
import com.zxl.mainactivity.listviewitem;
import android.app.activity;
import android.content.context;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import android.widget.baseadapter;
import android.widget.imageview;
import android.widget.listview;
import android.widget.textview;
public class customlistviewadapter extends baseadapter
{
  layoutinflater inflater;
  list<listviewitem> items;
  public customlistviewadapter(activity context, list<listviewitem> items) {
    super();
    this.items = items;
    this.inflater = (layoutinflater)context.getsystemservice(context.layout_inflater_service);
  }
  public int getcount() {
    // todo auto-generated method stub
    return items.size();
  }
  public object getitem(int position) {
    // todo auto-generated method stub
    return null;
  }
  public long getitemid(int position) {
    // todo auto-generated method stub
    return 0;
  }
  public view getview(final int position, view convertview, viewgroup parent) {
    // todo auto-generated method stub
    //items
    listviewitem item=items.get(position);
    view vi=convertview;
    if(convertview==null)
      vi = inflater.inflate(r.layout.item_row, null);
    imageview imgthumbnail=(imageview) vi.findviewbyid(r.id.imgthumbnail);
    textview txttitle =(textview) vi.findviewbyid(r.id.txttitle);
    textview txtsubtitle=(textview) vi.findviewbyid(r.id.txtsubtitle);
    imgthumbnail.setimageresource(item.thumbnailresource);
    txttitle.settext(item.title);
    txtsubtitle.settext(item.subtitle);
    return vi;
  }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical" >
  <textview
    android:id="@+id/textview1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello" />
  <listview
    android:id="@+id/listview1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignparentleft="true"
    android:layout_below="@+id/textview1"
    android:layout_alignparenttop="true" >
  </listview>
</relativelayout>

item_row.xml

<?xml version="1.0" encoding="utf-8"?>
<relativelayout
  android:id="@+id/relativelayout1"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:padding="5dip">
  <imageview
    android:layout_width="78dip"
    android:layout_height="78dip"
    android:id="@+id/imgthumbnail"
    android:layout_alignparentleft="true"
    android:layout_centerinparent="true"
    android:layout_marginleft="-3dip"
    android:scaletype="centerinside">
  </imageview>
  <textview
    android:textappearance="?android:attr/textappearancelarge"
    android:layout_height="wrap_content"
    android:text="textview"
    android:layout_width="wrap_content"
    android:id="@+id/txttitle"
    android:layout_torightof="@+id/imgthumbnail"
    android:layout_margintop="6dip"
    android:layout_marginleft="6dip">
  </textview>
  <textview
    android:layout_height="wrap_content"
    android:text="textview"
    android:layout_width="wrap_content"
    android:id="@+id/txtsubtitle"
    android:layout_torightof="@+id/imgthumbnail"
    android:layout_below="@+id/txttitle"
    android:layout_margintop="3dip"
    android:layout_marginleft="6dip">
  </textview>
</relativelayout>

文件结构：

更多关于android相关内容感兴趣的读者可查看本站专题：《android开发入门与进阶教程》、《android布局layout技巧总结》、《android视图view技巧总结》、《android编程之activity操作技巧总结》、《android操作json格式数据技巧总结》、《android资源操作技巧汇总》及《android控件用法总结》

希望本文所述对大家android程序设计有所帮助。