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[英]Why some of my TextViews and ImageViews not appear when executing app?
[英]The TextViews populated in my GridView appear blank
我正在使用Gridview显示技能列表。 代码运行良好,甚至可以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
为空白。
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skill_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>
数组不为空。 错误发生在这里附近
// set value into textview
textView = (TextView) gridView.findViewById(R.id.single_label);
textView.setText(skillValues[position]);
在以下条件下在文本视图中设置测试:
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);
} else {
gridView = (View) convertView;
}
textView.setText(skillValues[position]);
使用您的Adapter类来更改布局项目XML,这在我这边工作正常
它可以帮助你
<?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>
将以下行移出if-else块
textView.setText(skillValues[position]);
喜欢
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]);
我建议您阅读android ViewHolder模式。
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