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我SQLite數據庫表是這樣的:如何選擇記錄一對一場的SQLite的Android隨機
_id || Column1 || Column2 ||
1 || test1 || a,b,c,d,e,f ||
2 || test2 || g,h,i,j,k,l ||
3 || test3 || m,n,o,p,q,r ||
如何選擇一個隨機列2,從這個表?
我想要的結果是這樣的:
_id || Column1 || Column2 ||
1 || test1 || d ||
2 || test2 || k ||
3 || test3 || r ||
假定d,K,R是每個記錄的列2的隨機值。
感謝
更新: 我創建CustomAdapter並添加一些景觀是這樣的:
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
Cursor c = getCursor();
final LayoutInflater inflater = LayoutInflater.from(context);
View v = inflater.inflate(layout, parent, false);
int column2Name= c.getColumnIndex(DBAdapter.COLUMN2);
String col2Name= c.getString(column2Name);
String[] temp;
Random random = new Random();
temp = col2Name.split(",");
String col2 = temp[random.nextInt(temp.length)];
TextView col2_name = (TextView) v.findViewById(R.id.column2_label);
if (col2_name != null) {
col2_name .setText(col2);
}
return v;
}
@Override
public void bindView(View v, Context context, Cursor c) {
int column2Name= c.getColumnIndex(DBAdapter.COLUMN2);
String col2Name= c.getString(column2Name);
String[] temp;
Random random = new Random();
temp = col2Name.split(",");
String col2 = temp[random.nextInt(temp.length)];
TextView col2_name = (TextView) v.findViewById(R.id.column2_label);
if (col2_name != null) {
col2_name .setText(col2);
}
}
現在,只需使用customAdapter您的活動,使COLUMN2可以顯示爲1個隨機值。
嘗試'通過隨機()LIMIT 1從表順序列;'http://stackoverflow.com/questions/1253561/sqlite-order-by-rand – 2013-04-21 01:32:50
不,我的意思是,不是所有的列顯示隨機,但只記錄Column2 – wdyz 2013-04-21 01:34:39
y y或http://stackoverflow.com/questions/4114940/select-random-rows-in-sqlite – 2013-04-21 01:35:22