我使用下面的代码在AlertDialog中显示文件夹列表:
ListDialog = new AlertDialog.Builder(MyActivity.this);
ListDialog.setTitle("Folder List");
ListView folder = new ListView(MyActivity.this);
//scan folder
folder.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View v, int position, long id) {
//scan sub-folder
});
ListDialog.setPositiveButton("Save", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
//do something
}
});
ListDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface arg0, int arg1) {
//back
}
});
我想让 AlertDialog的 NegativeButton 总是显示,而当 list item 数是0时, AlertDialog的 PositiveButton
才显示。如何实现?