我有等待“syncingIntervalsInt”时间的函数,然后执行代码。我怎样才能创建倒计时?例如,当syncingIntervalsInt设置为10秒时,我想将一个TextView设置为此倒计时10,9,8等。
这是我的功能:
public void refreshRecycler()
{
countingTillSync = syncingIntervalsInt;
timerHandler = new Handler();
timerRunnable = new Runnable() {
@Override
public void run() {
//some code here
countingTillSync--;
}
timerHandler.postDelayed(this, syncingIntervalsInt*1000); //run every second
}
timerHandler.postDelayed(timerRunnable, syncingIntervalsInt*1000); //Start timer after 1 sec
}
以上代码仅在syncingIntervalsInt * 1000时间后递减,这不是我所期望的。
答案 0 :(得分:2)
你可以试试这个。
1.添加CountDownTimerUtils
public class CountDownTimerUtils extends CountDownTimer {
private TextView mTextView;
/**
* @param textView The TextView
* @param millisInFuture The number of millis in the future from the call
* to {@link #start()} until the countdown is done and {@link #onFinish()}
* is called.
* @param countDownInterval The interval along the way to receiver
* {@link #onTick(long)} callbacks.
*/
public CountDownTimerUtils(TextView textView, long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
this.mTextView = textView;
}
@Override
public void onTick(long millisUntilFinished) {
mTextView.setText(millisUntilFinished / 1000 + "sec");
mTextView.setClickable(false);
}
@Override
public void onFinish() {
mTextView.setText("retry");
mTextView.setClickable(true);
mTextView.setFocusable(true);
}
}
2.在此代码中设置。
// 1 param yourTextView was TextView you want to set
// 2 param 10 * 1000 was the number of millis in the future from the call
// 3 param 1000 was the interval along the way to receiver
CountDownTimerUtils mTimerUtils = new CountDownTimerUtils(yourTextView, 10 * 1000, 1000);
mTimerUtils.start();