Android:将字符串的第一个字母转换为小写字母

Question

我正在寻找一种方法将字符串的第一个字母转换为小写字母.我正在使用的代码从数组中提取随机字符串,在文本视图中显示字符串,然后使用它来显示图像.数组中的所有字符串的首字母大写,但存储在应用程序中的图像文件当然不能包含大写字母.

String source = "drawable/"
//monb is randomly selected from an array, not hardcoded as it is here
String monb = "Picture";

//I need code here that will take monb and convert it from "Picture" to "picture"

String uri = source + monb;
    int imageResource = getResources().getIdentifier(uri, null, getPackageName());
    ImageView imageView = (ImageView) findViewById(R.id.monpic);
    Drawable image = getResources().getDrawable(imageResource);
    imageView.setImageDrawable(image);

谢谢!

Answer 1

    if (monb.length() <= 1) {
        monb = monb.toLowerCase();
    } else {
        monb = monb.substring(0, 1).toLowerCase() + monb.substring(1);
    }

Answer 2

public static String uncapitalize(String s) {
    if (s!=null && s.length() > 0) {
        return s.substring(0, 1).toLowerCase() + s.substring(1);
    }
    else
       return s;
}