我创建使用AlertDialog.Buiilder多选择DialogFragment检查的项目数
mDialog = new AlertDialog.Builder(getActivity()).setIconAttribute(mIcon).setTitle(mTitle)
.setPositiveButton(mPositiveButton, new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
mCallbacks.onPositiveClick(((AlertDialog) getDialog()).getListView().getCheckedItemPositions(), mChoices);
}
}).setNegativeButton(mNegativeButton, new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
mCallbacks.onNegativeClick(((AlertDialog) getDialog()).getListView().getCheckedItemPositions());
}
}).setMultiChoiceItems(mChoices, mCheckedItems, new OnMultiChoiceClickListener() {
@Override
public void onClick(DialogInterface dialog, int which, boolean isChecked) {
if (mIsCheckedRequired) {
AlertDialog alertDialog = ((AlertDialog) dialog);
if (alertDialog.getListView().getCheckedItemCount() == 0)
alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);
else
alertDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(true);
}
}
}).create();
我也想使禁用正面按钮时,没有检查的项目多选择对话框:
@Override
public void onStart() {
super.onStart();
if (mIsCheckedRequired && mDialog.getListView().getCheckedItemCount() == 0) {
mDialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(false);
}
}
mDialog.getListView() .getCheckedItemCount()总是在点击之前重新生成0,有没有一种方法可以在点击之前知道已检查的项目计数,除非有字段mCheckedItems数组并通过它运行?
尝试定制与自己的布局文件对话框 – MathaN