问题
I have a short question:
How is it possible to convert a String, containing the Id of a Drawable, which is
String idString = "R.drawable.bubblegum";
to an Integer,
idInt
so that I can use that ID for the reference of an image (, which is used in a SimpleAdapter)
So, to make an example, I can't do that:
bubble.setImageDrawable(this.getResources().getDrawable(idString));
//not possible, cause idString is a String an not an Id/Int
So, I have the String that's containing the id, but unfortunately as a String.
Thanks!
回答1:
Although this question is rather old already, the thing you're missing is that "id" and "drawable" are different resource types. So instead of
getResources().getIdentifier(stringId, "id", "my.Package");
it's
getResources().getIdentifier(stringId, "drawable", "my.Package");
You can also get package name with the activity context like activityContext.getPackageName()
/**
* Returns Identifier of String into it's ID as defined in R.java file.
* @param pContext
* @param pString defnied in Strings.xml resource name e.g: action_item_help
* @return
*/
public static int getStringIdentifier(Context pContext, String pString){
return pContext.getResources().getIdentifier(pString, "string", pContext.getPackageName());
}
回答2:
Call getIdentifier()
on the Resources
object you get via getResources()
, as seen in these StackOverflow questions:
- Is possible in Android to findView by String id?
- Android findViewbyId with a variant string
- How to access R.string.xxx resources from a method by passing string 'xxx' as parameter to that method?
- Dynamically build a resource Identifier
- How to access the values from strings.xml dynamically?
- Drawable resource using a variable
among others.
回答3:
You could try the following
int id = getResources().getIdentifier("arr_name"+positionSelected,
"array", rootview.getContext().getPackageName());
I use in spinner dropdown, get array string follow parent spinner may help you!
回答4:
int idInt = R.drawable.bubblegum;
Unless there's something I'm missing here.
回答5:
if your idString
is constant, i.e. it's doesn't change during runtime, follow DeeV's answer.
If it changes, you can take a look at getIdentifier method.
回答6:
At least, I couldn't get a solution for this problem. It seems that there's no way to convert a String "R.id.mytext" into an integer like R.id.mytext that can be used in findViewById(R.id.myText).
来源:https://stackoverflow.com/questions/8038004/convert-string-containing-an-id-into-an-integer-id