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问题描述
我想将CountDown Ttimer值保存到一个变量中，以便下次用户启动Countdowntimer Activity时，它将在剩余的确切经过时间重新加载。
这是我的代码，我不明白为什么它不起作用。 （它显示我的时间文本框为空）
I want to save the CountDown Ttimer value into a variable so that next time the user start the Countdowntimer Activity, it to reload at the exact elapsed time as it remained.Here is my code and I don't understand why it doesn't works. (it shows my time Textbox empty)
prefs = PreferenceManager.getDefaultSharedPreferences(this);
long timer = prefs.getLong("TIME", 86400000);
new CountDownTimer(timer, 1000) {
public void onTick(long elapsed) {
System.out.print(elapsed);
long timer2=elapsed;
long hours = timer2 / hours_in_millies;
timer2 %= hours_in_millies;
long minutes = timer2 / minutes_in_millies;
timer2 %= minutes_in_millies;
long seconds = timer2 / seconds_in_millies;
time.setText(hours + ":" + minutes + ":" + seconds);
SharedPreferences.Editor editor = prefs.edit();
editor.putLong("TIME",elapsed);
editor.commit();
}
推荐答案
已解决：
prefs = PreferenceManager.getDefaultSharedPreferences(this);
xtime = System.currentTimeMillis()-prefs.getLong("TIME",System.currentTimeMillis());
long timer=86400000-(xtime+prefs.getLong("TIME2",0));
final SharedPreferences.Editor editor = prefs.edit();
editor.putLong("TIME2",xtime+prefs.getLong("TIME2",0));
editor.commit();
new CountDownTimer(timer, 1000) {
public void onTick(long elapsed) {
Log.d(TAG, "TIMER" + System.currentTimeMillis());
long timer2=elapsed;
long hours = timer2 / hours_in_millies;
timer2 %= hours_in_millies;
long minutes = timer2 / minutes_in_millies;
timer2 %= minutes_in_millies;
long seconds = timer2 / seconds_in_millies;
time.setText(hours + ":" + minutes + ":" + seconds);
}
public void onFinish()
{ Intent intent = new Intent(Hug.this, Hug_Accepted.class);
startActivity(intent);
}
}
.start();
xtime=System.currentTimeMillis();
SharedPreferences.Editor editor2 = prefs.edit();
editor2.putLong("TIME",xtime);
editor2.commit();
}
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