我正在使用具有 EditText 字段的警报对话框来提醒用户。
AlertDialog.Builder alert = new AlertDialog.Builder(this);
db.open();
Cursor f = db.getTitle(position + 1);
alert.setTitle("Age");
alert.setMessage("New age?");
// Set an EditText view to get user input
final EditText input = new EditText(this);
alert.setView(input);
input.setText(f.getString(3));
db.close();
alert.setPositiveButton("Change",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
String age = input.getText().toString();
db.open();
Cursor ff = db.getTitle(position + 1);
db.updateTitle(ff.getLong(0), ff.getString(1),
ff.getString(2), age, ff.getString(4),
ff.getString(5));
db.close();
details();
age();
}
});
alert.setNegativeButton("Keep", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
// do nothing
}
});
alert.show();
有没有办法只允许用户输入两位数(没有字母、符号等)?