我有一个带有两个开关的列表视图。我希望功能一次只能运行一个开关。
- 更新
我的适配器:
public class NotificationsAdapter extends ArrayAdapter<String> {
private Context context;
private String mTitle[];
private boolean onOff[];
public NotificationsAdapter(Context c, String mTitle[], boolean onOff[]) {
super(c, R.layout.adapter_notifications_layout, R.id.notificationsListTv, mTitle);
this.context = c;
this.mTitle = mTitle;
this.onOff = onOff;
}
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
LayoutInflater layoutInflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(R.layout.adapter_notifications_layout, parent, false);
Switch notificationSwitch = view.findViewById(R.id.switchNotificationsDaily);
TextView myTitle = view.findViewById(R.id.notificationsListTv);
myTitle.setText(mTitle[position]);
notificationSwitch.setChecked(onOff[position]);
view.setClickable(true);
view.setFocusable(true);
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int size = onOff.length;
for (int i = 0; i < size; i++) {
if (i == position) {
break;
}
onOff[i] = false;
}
if (onOff[position]) {
notificationSwitch.setChecked(false);
onOff[position] = false;
} else {
onOff[position] = true;
notificationSwitch.setChecked(true);
}
}
});
return view;
}
我的课:
private String[] mTitle = new String[]{"Once Daily", "Twice Daily"};
private Switch notificationSwitch;
private boolean[] onOff = new boolean[] {false, false};
NotificationsAdapter notificationsAdapter = new NotificationsAdapter(getActivity(), mTitle, onOff);
listView = view.findViewById(R.id.notificationsListView);
listView.setAdapter(notificationsAdapter);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setItemsCanFocus(true);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
}
});
}
目前,使用此代码,我可以选择两个开关同时处于活动状态。当我选择多个开关时,我希望另一个开关停用。任何帮助使此功能正常工作的帮助将不胜感激。
最佳答案
在您的活动中:-
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
resetValues(position);
if (onOff[position]) {
onOff[position] = false;
} else {
onOff[position] = true;
}
notifyDataSetChanged();
}
}
private void resetValues(int selectedPosition){
int size = onOff.length;
for(int i=0; i < size; i++){
if(i == selectedPosition){
continue;
}
onOff[i] = false;
}
}
并在您的适配器中:
notificationSwitch.setChecked(onOff[position]);
另外,从适配器中删除您的点击监听器。
逻辑是:-使除选定项目以外的所有其他值均为false,然后根据其先前状态更改选定项目的状态。
关于java - 带开关按钮的Android ListView-一次仅激活一个开关,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/62374220/