listview的写法

标签：

编写listView最重要的就是编写适配器Adapter,

adapter要完成以下几个工作

　　1,决定使用listview的子view

　　2,使用给listView显示数据的list

　　3,重写getView方法,为子view的控件设置内容

另外还要准备编写子view以及显示数据的类,比如listview显示的是水果的信息,那就编写一个水果类,图片名字等,定义setter getter

在Activity中初始化几个水果的类,并都装入到一个list中,然后使用adapter即可

代码如下:

我要编写的是一个用来显示奖项的listview,每个子view里面有奖项名,导演名以及这个导演的作品个数

首先编写好这个item view 定义四个textView

show_bonus_item.xml

<?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="horizontal">
<TextView
android:id="@+id/bonus_category_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/director_name"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="作品数:"/>
<TextView
android:id="@+id/bonus_count"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>

然后编写三个textview显示名字的类,第三个textview因为是固定显示"作品数"的所以不用再另外处理

public class ShowBonus {
    private String bonusCatrgory;
    private String directorName;
    private int moviesCount;

    public String getBonusCatrgory() {
        return bonusCatrgory;
    }

    public void setBonusCatrgory(String bonusCatrgory) {
        this.bonusCatrgory = bonusCatrgory;
    }

    public String getDirectorName() {
        return directorName;
    }

    public void setDirectorName(String directorName) {
        this.directorName = directorName;
    }

    public int getMoviesCount() {
        return moviesCount;
    }

    public void setMoviesCount(int moviesCount) {
        this.moviesCount = moviesCount;
    }
}

再编写一个adapter,重写getview方法

public class ShowBonusAdapter extends ArrayAdapter<ShowBonus>{
    private int resourceID;
    public ShowBonusAdapter(Context context, int resource, int textViewResourceId, List<ShowBonus> objects) {
        super(context, resource, textViewResourceId, objects);
        resourceID = textViewResourceId ;
    }
    //重写getView方法

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        //获取当前的ShowBonus实例
        ShowBonus showBonus = getItem(position);
        //为子view的各个控件设置内容
        View view = LayoutInflater.from(getContext()).inflate(resourceID,null);
        TextView bonusCatrgory = (TextView) view.findViewById(R.id.bonus_category_text);
        bonusCatrgory.setText(showBonus.getBonusCatrgory());
        TextView directorName = (TextView) view.findViewById(R.id.director_name);
        directorName.setText(showBonus.getDirectorName());
        TextView bonusCount = (TextView) view.findViewById(R.id.bonus_count);
        bonusCount.setText(""+showBonus.getMoviesCount());
        return view;
    }
}
然后就是在Activity里面初始化几个ShowBonus实例,将他们都装入到一个list中,再使用适配器即可,因为我用的是fragment,与Activity写法基本一致,只是findviewbyid的时候多用了一个view.findViewById

public class FragmentShowBonus extends Fragment {
    private Context context;
    private List<ShowBonus> listShowBonus = new ArrayList<ShowBonus>();
    private ListView showBonusListView;
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstancestate) {
        View view = inflater.inflate(R.layout.show_bonus_layout, container, false);
        initBonus();
        ShowBonusAdapter showBonusAdapter = new ShowBonusAdapter
                (this.getActivity(), R.layout.show_bous_item, listShowBonus);
        showBonusListView = (ListView) view.findViewById(R.id.bonus_listview);
        showBonusListView.setAdapter(showBonusAdapter);
        return view;
    }

    //实例化几个ShowBonus对象
    private void initBonus() {
        ShowBonus showBonus1 = new ShowBonus("1,最佳微电影导演奖", "李安", 20);
        ShowBonus showBonus2 = new ShowBonus("2,最佳栏目剧导演奖", "张艺谋", 16);
        ShowBonus showBonus3 = new ShowBonus("3,最佳纪录片导演奖", "贾樟柯", 19);
        ShowBonus showBonus4 = new ShowBonus("4,最佳儿童剧导演奖", "冯小刚", 13);
        ShowBonus showBonus5 = new ShowBonus("5,最佳电视剧导演奖", "陈凯歌", 23);
        ShowBonus showBonus6 = new ShowBonus("6,最佳企宣片导演奖", "王家卫", 25);
        ShowBonus showBonus7 = new ShowBonus("7,最佳产品片导演奖", "李安", 20);
        ShowBonus showBonus8 = new ShowBonus("7,最佳晚会导演奖", "斯皮尔伯格", 13);
        listShowBonus.add(showBonus1);
        listShowBonus.add(showBonus2);
        listShowBonus.add(showBonus3);
        listShowBonus.add(showBonus4);
        listShowBonus.add(showBonus5);
        listShowBonus.add(showBonus6);
        listShowBonus.add(showBonus7);
        listShowBonus.add(showBonus8);

    }
}

listview的写法

标签：

原文地址：http://www.cnblogs.com/qiaofei/p/4710116.html