importjava.util.Formatter;
import java.util.Locale;

public class Utils {
    private StringBuilder mFormatBuilder;
    private Formatter mFormatter;
    public Utils(){
        //轉換成字串的時間
mFormatBuilder = new StringBuilder();
        mFormatter = new Formatter(mFormatBuilder, Locale.getDefault());
    }

    /**
 
     * 把毫秒轉換成：1：20：30這樣的形式
* @param timeMs
* @return
*/
public String stringForTime(int timeMs){
        int totalSeconds = timeMs/1000;
        int seconds = totalSeconds % 60;
        int minutes = (totalSeconds/60)%60;
        int hours = totalSeconds/3600;
        mFormatBuilder.setLength(0);
        if(hours>0
 
){
            return mFormatter.format("%d:%02d:%02d",hours,minutes,seconds).toString();
        } else {
            return mFormatter.format("%02d:%02d",minutes,seconds).toString();
        }
    }
}