1

当我向下滚动,如果我在列表中上升,适配器仅加载图标和文本。如果我没有在适配器中设置可绘制,则 texview 可以正常绘制,但我想务实地更改我的图标。我可以看到android dev将在 api 级别 17 中得到支持,但现在我无法在我的适配器中使用它,有没有办法解决这个问题?

这是我的xml:

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/item"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:layout_gravity="center_vertical"
android:padding="4dp"
android:drawablePadding="4dp"
android:drawableLeft="@drawable/file"
PROBLEM -> android:drawableEnd="@drawable/next" >
</TextView>

和我的适配器代码:

public class MyAdapter extends ArrayAdapter<String> {
Context context; 
int layout_resourceId;
ArrayList<String> list_text;

public MyAdapter(Context context, int layout_resourceId, ArrayList<String> list_text) {
    super(context, layout_resourceId, list_text);
    this.context = context;
    this.layout_resourceId = layout_resourceId;
    this.list_text = list_text;
}

@Override
public View getView(int position, View convert_view, ViewGroup parent) {
    View row = convert_view;
    MyItemHolder holder = null;

    if(row == null) {
        LayoutInflater inflater = ((Activity)context).getLayoutInflater();
        row = inflater.inflate(layout_resourceId, parent, false);

        holder = new MyItemHolder();
        holder.text_view = (TextView)row.findViewById(R.id.item);
        holder.icon_view = (TextView)row.findViewById(R.id.item);

        row.setTag(holder);
    }
    else {
        holder = (MyItemHolder)row.getTag();
    }

    //text
    String string_item = list_text.get(position);
    holder.text_view.setText(string_item);

    //icon
    MyExtension.myExtension(string_item);
    int drawable = MyExtension.file_icon_is;
    holder.icon_view.setCompoundDrawablesWithIntrinsicBounds(drawable, 0, 0, 0);

    return row;
}
public static class MyItemHolder {
    TextView icon_view;
    TextView text_view;
}
}
4

2 回答 2

1

新的 api lv 17 有这方面的工作方法。将 TextView 分离到 TextView 和 ImageView 对我来说在旧的 api 上有用

于 2013-03-06T01:03:14.470 回答
0

This won't work in every circumstance, but try using android:width="wrap_content" with drawableLeft and drawableRight.

MyExtension.myExtension(string_item);
holder.text_view.setDrawableRight(MyExtension.file_icon_is);
于 2012-11-13T19:46:23.233 回答