从游标

Question

以下是我正在使用的代码段：

...
final String[] PROJECTION = new String[] {
    People._ID, People.NAME
};
preparePeople();
final Cursor c = mContext.getContentResolver().query(People.CONTENT_URI, PROJECTION, null, null, null);
android.util.Log.i("TAG","Rowcount =" + **c.getCount()**);
c.moveToFirst();
String s = **c.getString(0)**;
...
private void preparePeople() {
    final ContentResolver mResolver = mContext.getContentResolver();
    mResolver.delete(People.CONTENT_URI, null, null);
    final ContentValues valuse = new ContentValues();
    valuse.put(People._ID, "1");
    valuse.put(People.NAME, "name");
    Uri uri = mResolver.insert(People.CONTENT_URI, valuse);
}
...

这里的问题是它在日志中返回 Rowcount = 0 并给出以下异常：

android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0

请帮我解决这个问题，为什么它没有显示行？