Question

我想创建一个ToDo-List应用，我需要一个自定义ArrayAdapter<OwnClass>来显示用户输入。

我用来存储用户输入的类是：

public class ListElement {

private String title;
private String description;
private PriorityEnum priority;

ListElement (String title, String description, PriorityEnum pe) {
    this.title = title;
    this.description = description;
    this.priority = pe;
}

public String getDescription() {return description;}

public String getTitle() {return title;}

public PriorityEnum getPriority() {return priority;}

}

PriorityEnum可以高，中或低。

我在tutorial的帮助下制作了当前的工作 ListAdapter。这是我正在使用的修改版本：

public class ListElementArrayAdapter extends ArrayAdapter<ListElement> {

// declaring our ArrayList of items
private ArrayList<ListElement> objects;

/* here we must override the constructor for ArrayAdapter
* the only variable we care about now is ArrayList<Item> objects,
* because it is the list of objects we want to display.
*/
public ListElementArrayAdapter(Context context, int textViewResourceId, ArrayList<ListElement> objects) {
    super(context, textViewResourceId, objects);
    this.objects = objects;
}

/*
 * we are overriding the getView method here - this is what defines how each
 * list item will look.
 */
public View getView(int position, View convertView, ViewGroup parent){

    // assign the view we are converting to a local variable
    View v = convertView;

    // first check to see if the view is null. if so, we have to inflate it.
    // to inflate it basically means to render, or show, the view.
    if (v == null) {
        LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = inflater.inflate(R.layout.list_item, null);
    }

    /*
     * Recall that the variable position is sent in as an argument to this method.
     * The variable simply refers to the position of the current object in the list. (The ArrayAdapter
     * iterates through the list we sent it)
     *
     * Therefore, it refers to the current Item object.
     */
    ListElement i = objects.get(position);

    if (i != null) {

        // This is how you obtain a reference to the TextViews.
        // These TextViews are created in the XML files we defined.

        TextView tt = (TextView) v.findViewById(R.id.toptext);
        TextView ttd = (TextView) v.findViewById(R.id.toptextdata);
        TextView bt = (TextView) v.findViewById(R.id.bottomtext);
        TextView btd = (TextView) v.findViewById(R.id.desctext);

        // check to see if each individual textview is null.
        // if not, assign some text!
        if (tt != null){
            tt.setText("Title: ");
        }
        if (ttd != null){
            ttd.setText(i.getTitle());
        }
        if (bt != null){
            bt.setText("Description: ");
        }
        if (btd != null){
            btd.setText(i.getDescription());
        }
    }

    // the view must be returned to our activity
    return v;
}
}

（评论来自教程）

它正确描绘了List，但文本大小太小。

我已经尝试过了：

创建自定义xml文件 - ＆GT;问题：我的教授希望用户能够改变大小
在互联网上搜索，发现getView()返回TextView元素 - ＆GT;问题：我不知道如何将其应用于工作ArrayAdapter，而且我自己写一篇新文章太糟糕了。

提前谢谢！

如何在android中添加textSize修改到自定义ArrayAdapter <ownclass>？

0 个答案: