将IF语句添加到multiselectlist首选项中的每个数组索引值中

Question

我试图为每个数组索引值放置IF语句，该值来自MultiSelectList首选项。但是我有问题，这是我的代码，请帮助我。

public void displaySelectedDoa(View view) {
mySharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
Set<String> selectionsDoa = mySharedPreferences.getStringSet("selectedDoaKey", null);
String[] selectedDoa = selectionsDoa.toArray(new String[]{});
if (selectedDoa == "0") { // if index number = 0
    //do something at here
}
if (selectedDoa == "1") { // if index nuber = 1
    //do here
}

}

这是我的MultiSelectList从偏好片段

<MultiSelectListPreference
    android:title="Select Doa"
    android:summary="select your doa"
    android:key="selectedDoaKey"
    android:entries="@array/select_doa"
    android:entryValues="@array/select_doa_value"/>

Answer 1

试试这个

CharSequence[] selectedDoa = selectionsDoa.toArray(new String[]{});
    for (int i = 0; i < selectedDoa.length; i++){
        String index = selectedDoa[i].toString();
    }
 if (index.equals("string")){
//do here
}

Answer 2

selectedDoa是一个数组，不是单个字符串值，因此您需要检查所有选定的索引试试这个

for (int i=0;i<selectedDoa.length;i++){
        String index=selectedDoa[i];
        switch (index){
            case "0":
                //do what zero does
                continue;
            case "1":
                //do what one does
                continue;
        }
    }

正如我们的朋友Vaiden所说，如果开关字符串有问题

用

代替

if(index.equals("0"){
//do what zero does
}
else if(index.equals("1"){
//do what one does
}