Question

我使用Gridview显示技能列表。代码运行正常，甚至根据我的数组填充确切数量的项目。但是，应显示项目名称的 TextView 为空。

这是我的gridview适配器的代码

SkillsAdapter.java

public class SkillsAdapter extends BaseAdapter {

        private Context context;
        private final String[] skillValues;

        public SkillsAdapter(Context context, String[] skillValues) {
            this.context = context;
            this.skillValues = skillValues;
        }

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

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

            View gridView;

            if (convertView == null) {

                // get layout from mobile.xml
                gridView = inflater.inflate(R.layout.skills_single_item, null);

                // set value into textview
                textView = (TextView) gridView.findViewById(R.id.single_label);
                textView.setText(skillValues[position]);


            } else {
                gridView = (View) convertView;
            }

            return gridView;
        }

        @Override
        public int getCount() {
            return skillValues.length;
        }

        @Override
        public Object getItem(int position) {
            return null;
        }

        @Override
        public long getItemId(int position) {
            return 0;
        }

    }

这是我的布局文件 skills_single_item.xml

的代码

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:padding="5dp"
    android:background="@drawable/rounded_corners">

    <TextView
        android:id="@+id/single_label"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_gravity="center"/>

</RelativeLayout>

数组不为null。错误发生在这附近

// set value into textview
textView = (TextView) gridView.findViewById(R.id.single_label);
textView.setText(skillValues[position]);

Answer 1

在文本视图中设置测试，如果条件如下：

<script src="../js/services.js"></script>

Answer 2

更改你的布局项目XML你用我的Adapter类在我身边正常工作

它可以帮到你

<?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="wrap_content"
    android:background="#FFFFFF"
    android:orientation="horizontal"
    android:padding="5dp">

    <TextView
        android:id="@+id/single_label"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginLeft="8dp"
        android:textColor="#000000" />
</RelativeLayout>

Answer 3

将以下行移出if-else块

textView.setText(skillValues[position]);

像

  if (convertView == null) {
     // get layout from mobile.xml
     gridView = inflater.inflate(R.layout.skills_single_item, null); 
     textView = (TextView) gridView.findViewById(R.id.single_label);
  } else {
       gridView = (View) convertView;
  }

  // set value into textview
  textView.setText(skillValues[position]);

我建议你阅读android ViewHolder模式。

我的GridView中填充的TextViews显示为空白

3 个答案: