Question

您好我正在尝试实现自己的自定义适配器。

我想要的是一个包含以下项目的列表：

[图片文字]

...

我用SONGNAME1，SONGNAME2等临时项填充了一个列表。然后在这里运行代码是得到的：

它仅显示整个屏幕上列表的最后一个元素。我期待的是对每个列表行都有这种效果。

Here is what I get:

您可以在下面找到相关的代码。

这是主要活动：

...
protected void onPostExecute(String s) {
        super.onPostExecute(s);

        List<ListHolder> list = setList();
        CustomAdapter adp = new CustomAdapter(list,getApplicationContext());

        if (s == null) {
            mListView.setAdapter(adp);

        }
    }


    private List<ListHolder> setList() {
        // TODO Auto-generated method stub
        List<ListHolder> list = new ArrayList<ListHolder>();

        ListHolder l = new ListHolder();

        setContentView(R.layout.adapter);

        l.song_name = (TextView) findViewById(R.id.name);
        l.artist_name = (TextView) findViewById(R.id.dist);
        l.thumbnail = (ImageView) findViewById(R.id.img);
        for (int i = 0; i < 10; i++) {
            l.song_name.setText("SONGNAME"+i);
            l.artist_name.setText("ARTISTNAME"+i);
            l.thumbnail.setImageBitmap(getBitmapFromURL("a URL"));
            list.add(l);
        }

        return list;
    }

这是适配器：

public class CustomAdapter extends BaseAdapter{

private List<ListHolder> list;
private Context context;

public CustomAdapter(List<ListHolder> list, Context ctx) {
    //super(ctx, R.layout.adapter, list);
    this.list = list;
    this.context = ctx;
}

public View getView(int position, View convertView, ViewGroup parent) {

    View v = convertView;
    ListHolder holder = new ListHolder();
    // First let's verify the convertView is not null

    if (convertView == null) {

        // This a new view we inflate the new layout

        LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        v = inflater.inflate(R.layout.adapter, null);

        // Now we can fill the layout with the right values

        TextView tv = (TextView) v.findViewById(R.id.name);

        TextView distView = (TextView) v.findViewById(R.id.dist);

        ImageView img = (ImageView) v.findViewById(R.id.img);
        holder.song_name = tv;
        holder.artist_name = distView;
        holder.thumbnail = img;
        v.setTag(holder);
    }
    else{

        holder = (ListHolder) v.getTag();
    }

    holder.song_name.setText("song name");

    holder.artist_name.setText("artist name");
    holder.thumbnail.setImageBitmap(getBitmapFromURL("a URL"));
    //holder.img.setImageResource(p.getIdImg());


    v.setOnClickListener(new OnItemClickListener( position ));

    return v;

}

这是adapter.xml文件：

<?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="match_parent" >


<ImageView
    android:id="@+id/img"

    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_alignParentLeft="true"
    />


<TextView
    android:id="@+id/name"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignTop="@+id/img"
    android:layout_toRightOf="@+id/img"
    android:textStyle="bold" />

<TextView
    android:id="@+id/dist"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/name"
    android:layout_gravity="center"
    android:layout_marginTop="2dip"
    android:layout_toRightOf="@id/img"
    android:gravity="right"
    android:textSize="8dp"
    android:textStyle="italic" />

</RelativeLayout>

任何帮助将不胜感激！

Answer 1

imageview和relativelayout的高度应该是wrap_content。还可以在setList方法（）中删除setContentView（）函数。

自定义适配器影响整个布局而不是列表项/行

1 个答案: