Question

我想在通知中显示此功能的结果。

public class TimerService extends Service {
    public String timeString;
... // service methodd
public class CountingDownTimer extends CountDownTimer{
             public CountingDownTimer(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
        }

        @Override
        public void onTick(long leftTimeInMilliseconds) {

            timeString = String.format("%02d", 5000/ 60)
                    + ":" + String.format("%02d", 5000% 60);
                ...
        }
...// at the end of TimerService class
                    notification = new NotificationCompat.Builder(this)
                    .setContentText(timeString).build();

但遗憾的是，通知中没有显示任何内容（null）。我能做什么？如何将String值转换为char序列？

Answer 1

之前我遇到过类似的问题。你应该创建新方法并在其中放置通知。

private void setupNotification(String s) {}

最重要的是，您应该从timestring向CountingDownTimer发送setupNotification。所以这样做：

public class CountingDownTimer extends CountDownTimer{
    public String timeString=null;

         public CountingDownTimer(long millisInFuture, long countDownInterval) {
        super(millisInFuture, countDownInterval);
    }

    @Override
    public void onTick(long leftTimeInMilliseconds) {
        timeString = String.format("%02d", 5000/ 60)
                + ":" + String.format("%02d", 5000% 60);
       setupNotification(timeString);

    }

private void setupNotification(String s) {
    notification = new NotificationCompat.Builder(this)
                .setContentText(s)
}

我希望它有效！

Answer 2

String s="STR";
CharSequence cs = s;  // String is already a CharSequence

所以你只需将timeString传递给setContentText

修改

似乎你在CountingDownTimerstarts之前调用了notification.setContentText（）。

致电notification 在OnFinish()
内
public CountingDownTimer(long millisInFuture, long countDownInterval) { @Override public void onTick(long l) { timeString = String.format("%02d", l / 60) + ":" + String.format("%02d", l % 60); // Add Here notification = new NotificationCompat.Builder(this) .setContentText(timeString).build(); } @Override public void onFinish() { } }.start();

此处倒数计时器完成后的通知设置

将字符串值转换为charsequence并在android中的通知中显示它

2 个答案: