android - 计时器格式更改为 0 :0 to 00:00?

Question

我想要这样的天文台星，如果它在 0:5 (M:S) 我想要这样的 00:05这是我正在使用的代码:

stopWatch = (Chronometer) findViewById(R.id.chrono);
    stopWatch.setOnChronometerTickListener(new OnChronometerTickListener(){
        @Override
        public void onChronometerTick(Chronometer arg0) {
            countUp = (SystemClock.elapsedRealtime() - arg0.getBase()) / 1000;
            String asText = (countUp / 60) + ":" + (countUp % 60); 
            time_view.setText("Time : " +asText);
        }
    });
    stopWatch.start();

我必须为该修改更改的地方..

Answer 1

你可以使用 NumberFormatter

NumberFormat formatter = new DecimalFormat("00");
stopWatch = (Chronometer) findViewById(R.id.chrono);
stopWatch.setOnChronometerTickListener(new OnChronometerTickListener(){
    @Override
    public void onChronometerTick(Chronometer arg0) {
        countUp = (SystemClock.elapsedRealtime() - arg0.getBase()) / 1000;
        String asText = formatter.format(countUp / 60) + ":" + formatter.format(countUp % 60); 
        time_view.setText("Time : " +asText);
    }
});
stopWatch.start();

Some more number format examples