我使用下面的代码列出数组中的一些项目，而滚动 ListView 项目是在数组中追加更多相同的数据退出我不知道我犯了什么错误。
有人指出我哪里出错了。
private static String array_spinner_subcategories[];
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
setContentView(R.layout.sub_categories);
setSubCat();
ListView sub_categories=(ListView)findViewById(R.id.sub_catlist);
sub_categories.setAdapter(new EfficientAdapter(this));
sub_categories.setAdapter(adapter);
sub_categories.setOnItemClickListener(subcatlistener);
cr=getContentResolver();
}
public String[] setSubCat(){
recordDB=new Viddatabase(this);
db=recordDB.getWritableDatabase();
array_spinner_subcategories=recordDB.subcategoriesList(db);
recordDB.close();
return array_spinner_subcategories;
}
private OnItemClickListener subcatlistener = new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v, int position,
long id) {
System.gc();
Toast.makeText(SubCategories.this,array_spinner_subcategories[position],
Toast.LENGTH_LONG).show();
}
};
private static class EfficientAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public EfficientAdapter(Context context) {
mInflater = LayoutInflater.from(context);
}
public int getCount() {
return array_spinner_subcategories.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
System.gc();
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.albumlist, null);
holder = new ViewHolder();
holder.subCategories = (TextView) convertView.findViewById(R.id.albumDetails);
holder.subCategories.setText(array_spinner_subcategories[position]);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
return convertView;
}
static class ViewHolder {
TextView subCategories;
}
}
最佳答案
将 holder.subCategories.setText(array_spinner_subcategories[position]); 行移动到 else block 下方的 getView() 方法中
关于android - ListView 项目在 android 中重复？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5500325/