我有一个自定义对话框包含一个复选框。当我检查 CheckBox 时，会创建新视图并将其添加到对话框中。如果我取消选中复选框，它将使添加的视图消失并将其更改回以前的视图。
这是它的样子。左侧图片为检查前，左侧为检查后。
选中对话框后，对话框布局将变大，如上图所示。
我的问题是如何使对话框布局逐渐变大而不是立即变大。像动画这样的东西，使布局逐渐扩展。
这是我迄今为止的工作。
public class CreateRoomDialogFragment extends DialogFragment {
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the Builder class for convenient dialog construction
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
//Get layout inflater
LayoutInflater inflater = getActivity().getLayoutInflater();
//R.layout.add_player2 is the layout shows on dialog message
view = inflater.inflate(R.layout.createroom_dialog_fragment, null);
roomName = (EditText)view.findViewById(R.id.createroom_dialog_roomname);
roomKey = (EditText)view.findViewById(R.id.createroom_dialog_key);
keyLayout = (LinearLayout)view.findViewById(R.id.keyLayout);
checkBoxLayout1 = (RelativeLayout)view.findViewById(R.id.createroom_dialog_layout1);
checkBoxLayout2 = (RelativeLayout)view.findViewById(R.id.createroom_dialog_layout2);
// lock the room with key
checkBox1 = (CheckBox)view.findViewById(R.id.createroom_dialog_checkbox1);
// show the key
checkBox2 = (CheckBox)view.findViewById(R.id.createroom_dialog_checkbox2);
checkBox1.setOnCheckedChangeListener(new CreateRoomCheckBoxListener());
checkBox2.setOnCheckedChangeListener(new CreateRoomCheckBoxListener());
}
private class CreateRoomCheckBoxListener implements OnCheckedChangeListener{
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if(buttonView == checkBox1){
// lock the room with key
if(isChecked){
roomKey.setVisibility(View.VISIBLE);
checkBoxLayout2.setVisibility(View.VISIBLE);
}else{
roomKey.setVisibility(View.GONE);
checkBoxLayout2.setVisibility(View.GONE);
}
}
}
}
}