Get attribute name from string array

问题

I have string array that looks like this:

<string-array name="USA">
    <item name="NY">001</item>
    <item name="LA">002</item>
    <item name="WA">003</item>
</string-array>

I can get those numbers by:

Resources res = getResources();
int arryid = res.getIdentifier("USA", "array", getPackageName());
String[] numbers = res.getStringArray(arryid);

But how can I also get the names (NY,LA,WA)? Note that I have a lot of counties... Maybe use different approach?

回答1:

In the documentation there is no name attribute for an <item>.

So I don't think there will be any way to get those keys.

However, if you want to get name of string or string-array, you can get it programmatically but not for the <item>.

回答2:

As "001" is just the index, why not simply use that?

<string-array name="USA">
    <item>NY</item>
    <item>LA</item>
</string-array>

Then just use index + 1 for the position:

String[] usaStates = getResources().getStringArray(R.array.USA);

int index = 0;

String firstStateName = usaStates[index];
int firstStatePosition = (index + 1);

That aside, you can use two arrays and merge them into a HashMap:

<string-array name="USA">
    <item>NY</item>
    <item>LA</item>
</string-array>

<string-array name="USA_pos">
    <item>001</item>
    <item>002</item>
</string-array>

String[] usaStates = getResources().getStringArray(R.array.USA);
String[] usaStatePositions = getResources().getStringArray(R.array.USA_pos);

Map <String, String> map = new HashMap<>(usaStates.length);

for (int i = 0; i < usaStates.length; i++) {
    map.put(usaStates[i], usaStatePositions[i]);
}

回答3:

String[] numbers = getResources().getStringArray(R.array.USA);

to get data from array use.

numbers[id]

add array like this.

<string-array name="USA">
    <item>NY</item>
    <item>LA</item>
    <item>WA</item>
</string-array>

来源：https://stackoverflow.com/questions/34450730/get-attribute-name-from-string-array

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android

android-xml