嘿家伙我的问题是一个字的第一个字母不显示在我的ListView
,但它显示一个空白。我怎样才能解决这个问题 。我相信我的问题是在charAt
.Sorry我是新手charAt在java不工作,字的第一个字母不显示
这里是我的代码
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
LayoutInflater vi = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = vi.inflate(R.layout.listview_item, null);
holder = new ViewHolder();
holder.imageView = (ImageView)convertView.findViewById(R.id.image_View);
holder.SubjectName = (TextView) convertView.findViewById(R.id.textView1);
holder.SubjectFullForm = (TextView) convertView.findViewById(R.id.textviewFullForm);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
PlacesList subject = SubjectListTemp.get(position);
holder.SubjectName.setText(subject.getSubName());
holder.SubjectFullForm.setText(subject.getSubFullForm());
String firstLetter = String.valueOf(getItem(position).charAt(0));
ColorGenerator generator = ColorGenerator.MATERIAL; // or use DEFAULT
// generate random color
int color = generator.getColor(getItem(position));
TextDrawable drawable = TextDrawable.builder()
.buildRound(firstLetter, color); // radius in px
holder.imageView.setImageDrawable(drawable);
return convertView;
}
,这是我PlacesList.java
public class PlacesList {
String SubName = null;
String SubFullForm = null;
public PlacesList(String Sname, String SFullForm) {
super();
this.SubName = Sname;
this.SubFullForm = SFullForm;
}
public String getSubName() {
return SubName;
}
public void setSubName(String code) {
this.SubName = code;
}
public String getSubFullForm() {
return SubFullForm;
}
public void setSubFullForm(String name) {
this.SubFullForm = name;
}
@Override
public String toString() {
return SubName + " " + SubFullForm ;
}
public char[] charAt(int i) {
return new char[0];
}
}
它是一个unicode字符串吗?你是否也有其他角色的问题(比如'charat(2)')? –
即时通讯在我的listview textdrawable https://github.com/amulyakhare/TextDrawable中使用这个libray,但我的问题即时通讯不使用因此,charat功能不能很好地工作,它显示在我的列表视图而不是字母空白。即时通讯使用而不是 –
是'PlacesList'自定义类型?如果是的话,定义一个方法返回特定索引处的字符,就像你想要的那样。 –