如果我将这段代码写在 Activity 中但它不在 Fragment 中运行,它会完美运行。我希望它在应用程序被杀死后在后台运行。
这是我的倒计时
public void bonus(){
mEndTime = System.currentTimeMillis() + timeleftinmillis;
Log.i("timeadd", String.valueOf(mEndTime));
countDownTimer = new CountDownTimer(timeleftinmillis,1000) {
@Override
public void onTick(long l) {
timeleftinmillis=l;
updateTimer();
}
@Override
public void onFinish() {
mrunning=false;
updateButtons();
}
}.start();
mrunning=true;
bonusmoney.setText( String.valueOf(clickcount));
updateButtons();
}
这里是我把时间转换成分秒的地方
public void updateTimer (){
long min = (timeleftinmillis/1000) / 60;
long sec = (timeleftinmillis/1000) % 60;
String timeformat = String.format(Locale.getDefault(),"%02d:%02d",min,sec);
timerbonusview.setText(timeformat);
}
这是我的 OnStart() 方法
@Override
public void onStart() {
super.onStart();
SharedPreferences prefs = getContext().getSharedPreferences("prefs", MODE_PRIVATE);
timeleftinmillis = prefs.getLong("millisLeft", timeinmillis);
mrunning = prefs.getBoolean("timerRunning", false);
updateTimer();
updateButtons();
if (mrunning) {
mEndTime = prefs.getLong("endTime", 0);
Log.i("endtime", String.valueOf(mEndTime));
timeleftinmillis = mEndTime - System.currentTimeMillis();
Log.i("timeleft", String.valueOf(timeleftinmillis));
if (timeleftinmillis < 0) {
timeleftinmillis = 0;
mrunning = false;
Log.i("timebonus", "less than zero");
updateTimer();
updateButtons();
} else {
bonus();
}
}
}
这是我的 onStop() 方法
@Override
public void onStop() {
super.onStop();
SharedPreferences prefs = getContext().getSharedPreferences("prefs", MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putLong("millisLeft", timeleftinmillis);
editor.putBoolean("timerRunning", mrunning);
editor.putLong("endTime", mEndTime);
editor.apply();
if (countDownTimer != null) {
countDownTimer.cancel();
}
}
在这里更新按钮
private void updateButtons() {
if (mrunning) {
dailyearningsbtn.setVisibility(View.INVISIBLE);
}else {
dailyearningsbtn.setVisibility(View.VISIBLE);
}
}
要在应用程序被杀死后运行任务,请考虑在 android 中使用background services