嗨我使用游标适配器为我的listview,我的问题是当我把我的应用程序放在后台,重新调整我的屏幕是空的,在onresume我已经打开数据库并创建光标仍然我有问题,我怎么解决我的问题,请帮助我。
searchCursor= dbReaderContact.rawQuery(query, null);
startManagingCursor(searchCursor);
String[] from=new String[] {ALDbAdapter.TITLE,DbAdapter.CATID,DbAdapter.LTID,DbAdapter.RK,DbAdapter.SUBTITLE};
int [] to=new int[] {R.layout.ctllist_item};
catSearchAdapter=new CategorySearchAdapter(context, R.layout.ctllist_item, searchCursor, from, to);
//////////////Adapter calss
public class CategorySearchAdapter extends SimpleCursorAdapter implements Filterable{
private Context context;
private int layout;
private ALDbAdapter dbadapter;
/**
* @param context
* @param layout
* @param c
* @param from
* @param to
*/
public CategorySearchAdapter(Context context, int layout, Cursor c, String[] from, int[] to) {
super(context, layout, c, from, to);
this.layout=layout;
this.context=context;
dbadapter=new ALDbAdapter(context);
try {
dbadapter.openAngiesListDb();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
if (getFilterQueryProvider() != null) { return getFilterQueryProvider().runQuery(constraint); }
StringBuilder buffer = null;
String[] args = null;
if (constraint != null) {
buffer = new StringBuilder();
buffer.append("UPPER(");
buffer.append("name");
buffer.append(") GLOB ?");
args = new String[] { constraint.toString().toUpperCase() + "*" };
}
Cursor c=null;
// c=dbadapter.getPartialNamesSearch(constraint.toString());
return c;
}
@Override
public void bindView(View v, Context context, Cursor c) {
TextView subTitle=(TextView)v.findViewById(R.id.ctlName);
TextView title=(TextView)v.findViewById(R.id.cltAssocationName);
ImageView imgIcon=(ImageView)v.findViewById(R.id.ctlLogo);
int subTitInd=c.getColumnIndex(ALDbAdapter.SUBTITLE);
int titInd=c.getColumnIndex(ALDbAdapter.TITLE);
int ltId=c.getColumnIndex(ALDbAdapter.LTID);
int ltype=c.getInt(ltId);
if(!c.getString(subTitInd).equalsIgnoreCase("")){
subTitle.setText(c.getString(subTitInd));
title.setText(c.getString(titInd));
}else{
subTitle.setText(c.getString(titInd));
}
if(ltype==1){
imgIcon.setImageResource(R.drawable.logo1);
}else if(ltype==2){
imgIcon.setImageResource(R.drawable.logo2);
}else{
imgIcon.setImageResource(R.drawable.logo3);
}
}
}
//On post i closed the cursor
///On Resume
searchCursor= dbReaderContact.rawQuery(query, null);
startManagingCursor(searchCursor);
答案 0 :(得分:1)
您正在谈论ListView并使用SimpleCursorAdapter。你不认为创建自己的ArrayAdaptor不是更有效:你创建一个自己的类来保存你想要的数据从你的数据库请求(遍历你的Cursor),然后你填充该类的ArrayList。 然后将此ArrayList提供给扩展ArrayAdaptor的类。您应该将ArrayList存储在ArrayAdaptor中并覆盖contructor和public View getView(int position,View convertView,ViewGroup parent)方法来创建ListView的每个视图。
您可以谷歌自定义ListView(第一个结果:http://www.softwarepassion.com/android-series-custom-listview-items-and-adapters/)。