Android进度条倒计时

Question

我正在为 Android 进行测验，我想要在有限的时间内回答每个问题。所以我想在答案下显示一个进度条，从 5 到 0（秒）倒计时。当它达到零时我想做一些事情。我有测验并且一切正常，我只想添加进度栏。

提前致谢！

Answer 1

您可以在 Android 中使用倒计时器。

这是一个您可以参考的示例单击此处

您可以在您的 Activity 中使用下面的 ProgressBar。

   <ProgressBar 
    android:id="@+id/progressbar"
    style="@android:style/Widget.ProgressBar.Horizontal"
    android:max="100"
    android:progress="0"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_above="@+id/bottom_header_relativelayout"
    />

在您的活动中使用

CountDownTimer

就像下面的代码。

ProgressBar mProgressBar;
CountDownTimer mCountDownTimer;
int i=0;

mProgressBar=(ProgressBar)findViewById(R.id.progressbar);
mProgressBar.setProgress(i);
   mCountDownTimer=new CountDownTimer(5000,1000) {

        @Override
        public void onTick(long millisUntilFinished) {
            Log.v("Log_tag", "Tick of Progress"+ i+ millisUntilFinished);
            i++;
            mProgressBar.setProgress((int)i*100/(5000/1000));

        }

        @Override
        public void onFinish() {
        //Do what you want 
            i++;
            mProgressBar.setProgress(100);
        }
    };
    mCountDownTimer.start();

Answer 2

您可以使用

ObjectAnimator

来动画化

ProgressBar

的进度：

ObjectAnimator animation = ObjectAnimator.ofInt(pb, "progress", 0, 100);
animation.setDuration(5000);
animation.setInterpolator(new DecelerateInterpolator());
animation.addListener(new Animator.AnimatorListener() {
    @Override
    public void onAnimationStart(Animator animator) { }

    @Override
    public void onAnimationEnd(Animator animator) {
        //do something when the countdown is complete
    }

    @Override
    public void onAnimationCancel(Animator animator) { }

    @Override
    public void onAnimationRepeat(Animator animator) { }
});
animation.start();

Answer 3

无需 XML 声明

ProgressDialog TempDialog;
CountDownTimer CDT;
int i =5;

TempDialog = new ProgressDialog(Your_Class_Name.this);
TempDialog.setMessage("Please wait...");
TempDialog.setCancelable(false);
TempDialog.setProgress(i);
TempDialog.show();

CDT = new CountDownTimer(5000, 1000)
{
    public void onTick(long millisUntilFinished)
    {
        TempDialog.setMessage("Please wait.." + i + " sec");
        i--;
    }

    public void onFinish()
    {
        TempDialog.dismiss();
        //Your Code ...
    }
}.start();

Answer 4

你可以尝试一下这个例子，它是从100到0倒计时并显示在ProgressBar中。

val maxSecond = 60L
val timerBar = viewForm.findViewById<ProgressBar>(R.id.pb_timer)
timerBar.max = 100
timerBar.progress = 100
var distinct = 0.0f
object : CountDownTimer(1000 * maxSecond, 1000) {
  override fun onTick(millisUntilFinished: Long) {
    val second = (millisUntilFinished / 1000.0f).roundToInt()
    val unit = (second.toFloat() / 100f)
    if(distinct == 0f){
      distinct = 100f / unit
    }
    val cal = unit * distinct
    timerBar.progress = cal.toInt()
  }
  override fun onFinish() {
    Log.d("check", "done!")
  }
}.start()