正如我在标题中所说,我想将光标的值保存到字符串数组中。我将在ArrayAdapter中使用此数组并调用setLineAdapter(ArrayAdapter)..我有这些代码,但LogCat在 arr [i] = crr.getString(i)行有问题...可以来人帮帮我?
DBAdapter db;
String arr[];
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
db = new DBAdapter(this);
db.open();
ArrayAdapter<String> AA = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, arr);
try {
Cursor crr = db.getRecord(4);
crr.moveToFirst();
for (int i = 0; i <= cr.getCount(); i++){
arr[i] = cr.getString(i);
crr.moveToNext();
}}
catch (IOException e) {e.printStackTrace();}
setListAdapter(AA);
db.close();
答案 0 :(得分:1)
将代码更改为使用do-while并使用ArrayList
代替从光标填充动态值的Array:
ArrayList<String> arrcurval=new ArrayList<String>();
if (crr.moveToFirst()) {
do {
arrcurval.add(crr.getString(0)); //<< pass column index here instead of i
} while (crr.moveToNext());
}
答案 1 :(得分:0)
你必须分配数组,因此:
Cursor crr = db.getRecord(4);
int n = crr.count();
arr = new int[n];