如何从字符串中获取Android中的资源

Question

I have a json file which contains name of resource that I want to use in my code, but i do not know how? Json file

{
file1: "file1.xml",
file2: "file2.xml"
...
}

I need to do somethin like this

InputStream f1 = this.getResources().openRawResource(R.raw.file1);
InputStream f2 = this.getResources().openRawResource(R.raw.file2);
InputStream f3 = this.getResources().openRawResource(R.raw.file3);

Than use this in my code further

Answer 1

Try with this:

String rawFileName = "file1.xml"
int resId = context.getResources().getIdentifier(rawFileName, "raw", context.getPackageName());
InputStream f1 = this.getResources().openRawResource(resId);`

Answer 2

Give the Resources#getIndentifier() method a try, though you'll probably need to strip out the file extension:

public static int getIdentifierForRawXmlFileName(Context context, String fileName) {
    final Resources res = context.getResources();
    final String packageName = context.getPackageName();
    if (fileName.endsWith(".xml") {
        fileName = fileName.subString(0, fileName.lastIndexOf(".xml"));
    }
    return res.getIdentifier(fileName, "raw", packageName);
 }

Which you could use as:

final int rawId = getIndetifierForRawXmlFileName(this, "file1.xml");
final InputStream is = getResources().openRawResource(rawId);