我有一个显示倒计时的小部件。为了做到这一点,我使用CountDownTimer类,但问题是倒计时经常停止!我认为因为android会自动停止线程因为countdownc在很多小时内。 HOw可以解决这个问题吗?谢谢
public class TempoIndietro extends CountDownTimer{
AppWidgetManager manager;
ComponentName thisWidget;
public TempoIndietro(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
thisWidget = new ComponentName(context, widget.class);
manager = AppWidgetManager.getInstance(context);
remoteView = new RemoteViews(context.getPackageName(),R.layout.widgett);
}
@Override
public void onFinish() {
remoteView.setTextViewText(R.id.textView2, context.getResources().getString(R.string.onair_widget_countdown));
manager.updateAppWidget(thisWidget, remoteView);
}
@Override
public void onTick(long millisUntilFinished) {
SimpleTimeFormat tf = new SimpleTimeFormat("$dd$ : $HH$: $mm$: $ss$");
String risultato = tf.format(millisUntilFinished); // arg0 tempo
remoteView.setTextViewText(R.id.textView2, risultato);
manager.updateAppWidget(thisWidget, remoteView);
};
}
答案 0 :(得分:0)
记住计时器的开始时间并计算与该时间的差异。
您可以使用本地存储。
最好在Activity中的onStop()和onResume()中调用它。
保存:
SharedPreferences settings = getSharedPreferences("myappname", 0);
SharedPreferences.Editor editor = settings.edit();
editor.putLong("varname", startDate.getTime());
editor.commit();
提取:
SharedPreferences settings = getSharedPreferences("myappname", 0);
Long millis = settings.getLong("varname", null);
Date startDate = new Date(millis);