android使用Rxjava实现倒计时功能

 /**
 * 点击获取验证码，10S倒计时，利用Rxjava进行线程切换
 * @param view
 */
 public void getSureCode(View view) {
  Observable.create(new ObservableOnSubscribe<Integer>() {
   @Override
   public void subscribe(ObservableEmitter<Integer> emitter) throws Exception {
    int i = 10;
    while (i >= 0) {
     try {
      Thread.sleep(1000);
      emitter.onNext(i);
     } catch (InterruptedException e) {
      e.printStackTrace();
     }
     i--;
    }
    emitter.onComplete();
   }
  }).subscribeOn(Schedulers.io())// 此方法为上面发出事件设置线程为IO线程
    .observeOn(AndroidSchedulers.mainThread())// 为消耗事件设置线程为UI线程
    .subscribe(new Consumer<Integer>() {
     @Override
     public void accept(Integer integer) throws Exception {
      bindingView.countDownTv.setClickable(integer > 0 ? false : true);
      bindingView.countDownTv.setBackground(integer > 0 ? getResources().getDrawable(R.drawable.rectangle_gray_bg) : getResources().getDrawable(R.drawable.rectangle_red_bg));
      if(integer > 0) {
       String content = integer + "秒后可重新发送";
       SpannableString span = new SpannableString(content);
       int index = content.indexOf("后");
       span.setSpan(new ForegroundColorSpan(getResources().getColor(R.color.colorTheme)), 0, index, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); //设置前景色为红色
       bindingView.countDownTv.setText(span);
      } else {
       bindingView.countDownTv.setText(getString(R.string.get_check_code));
      }
     }
    });
 }

<layout  ns:android="http://schemas.android.com/apk/res/android">

 <LinearLayout  ns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical"
  tools:context="com.smilexie.countdownwithrxjava.MainActivity">

  <TextView
   android:id="@+id/count_down_tv"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_margin="10dp"
   android:gravity="center"
   android:layout_gravity="center_vertical"
   android:padding="8dp"
   android:background="@drawable/rectangle_red_bg"
   android:text="@string/get_check_code"
   android:textSize="14sp"
   android:textColor="@color/white"
   android: ="getSureCode"/>

 </LinearLayout>
</layout>

<?  version="1.0" encoding="utf-8"?>
<shape  ns:android="http://schemas.android.com/apk/res/android"
 android:shape="rectangle">
 <!-- 填充颜色 -->
 <solid android:color="@color/colorLineItem"></solid>
 <!-- 线的宽度，颜色灰色 -->
 <stroke android:width="1dp" android:color="@color/colorLineItem"></stroke>
 <!-- 矩形的圆角半径 -->
 <corners android:radius="5dp" />
</shape>

<?  version="1.0" encoding="utf-8"?>
<shape  ns:android="http://schemas.android.com/apk/res/android"
 android:shape="rectangle">
 <!-- 填充颜色 -->
 <solid android:color="@color/colorTheme"></solid>
 <!-- 线的宽度，颜色灰色 -->
 <stroke android:width="1dp" android:color="@color/colorTheme"></stroke>
 <!-- 矩形的圆角半径 -->
 <corners android:radius="5dp" />
</shape>

<color name="colorLineItem">#FFDDDDDD</color>
<color name="colorTheme">#f64a33</color>