Andorid实现点击获取验证码倒计时效果

 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;
   }
 
   /**
    * 倒计时期间会调用
    * @param millisUntilFinished
    */
   @Override
   public void onTick(long millisUntilFinished) {
     mTextView.setClickable(false); //设置不可点击
     mTextView.setText(millisUntilFinished / 1000 + "秒"); //设置倒计时时间
     mTextView.setBackgroundResource(R.drawable.shape_verify_btn_press); //设置按钮为灰色，这时是不能点击的
 
     SpannableString spannableString = new SpannableString(mTextView.getText().toString()); //获取按钮上的文字
     ForegroundColorSpan span = new ForegroundColorSpan(Color.RED);
     /**
      * public void setSpan(Object what, int start, int end, int flags) {
      * 主要是start跟end，start是起始位置,无论中英文，都算一个。
      * 从0开始计算起。end是结束位置，所以处理的文字，包含开始位置，但不包含结束位置。
      */
     spannableString.setSpan(span, 0, 2, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);//将倒计时的时间设置为红色
     mTextView.setText(spannableString);
   }
 
   /**
    * 倒计时完成后调用
    */
   @Override
   public void onFinish() {
     mTextView.setText("重新获取验证码");
     mTextView.setClickable(true);//重新获得点击
     mTextView.setBackgroundResource(R.drawable.shape_verify_btn_normal); //还原背景色
   }
 } 

 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
   android:shape="rectangle" >
 
   <!-- 填充的颜色：这里设置背景透明 -->
   <solid android:color="@color/maincolor" />
   <!-- 边框的颜色 ：不能和窗口背景色一样-->
   <stroke
     android:width="1dp"
     android:color="@color/white" />
   <!-- 设置按钮的四个角为弧形 -->
   <!-- android:radius 弧形的半径 -->
   <corners android:radius="5dip" />
 
   <!-- padding：Button里面的文字与Button边界的间隔 -->
   <padding
     android:bottom="5dp"
     android:left="5dp"
     android:right="5dp"
     android:top="5dp" />
 </shape>

 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
   android:shape="rectangle" >
 
   <!-- 填充的颜色：这里设置背景透明 -->
   <solid android:color="@color/graywhite" />
   <!-- 边框的颜色 ：不能和窗口背景色一样-->
   <stroke
     android:width="1dp"
     android:color="@color/white" />
   <!-- 设置按钮的四个角为弧形 -->
   <!-- android:radius 弧形的半径 -->
   <corners android:radius="5dip" />
 
   <!-- padding：Button里面的文字与Button边界的间隔 -->
   <padding
     android:bottom="5dp"
     android:left="5dp"
     android:right="5dp"
     android:top="5dp" />
 </shape>

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:background="@drawable/login_bg">
 
   <EditText
     android:id="@+id/rst_phone_number"
     android:layout_width="match_parent"
     android:layout_height="40dp"
     android:inputType="phone"
     android:hint="@string/phone_number"
     android:textSize="16sp"
     android:textColor="@color/black"
     android:singleLine="true"
     android:background="@drawable/shape_form"
     android:textCursorDrawable="@drawable/text_cursor"
     android:layout_marginLeft="30dp"
     android:layout_marginRight="30dp"
     android:layout_marginTop="30dp"
     android:layout_gravity="center_vertical"/>
 
   <LinearLayout
     android:layout_width="match_parent"
     android:layout_height="40dp"
     android:layout_marginLeft="30dp"
     android:layout_marginRight="30dp"
     android:layout_marginTop="15dp"
     android:orientation="horizontal">
 
     <EditText
       android:id="@+id/rst_verify_code"
       android:layout_width="wrap_content"
       android:layout_height="match_parent"
       android:layout_weight="1"
       android:inputType="number"
       android:hint="@string/rst_verify_code"
       android:textSize="16sp"
       android:textColor="@color/black"
       android:singleLine="true"
       android:background="@drawable/shape_form"
       android:textCursorDrawable="@drawable/text_cursor" />
 
     <TextView
       android:id="@+id/rst_send_code"
       android:layout_width="130dp"
       android:layout_height="match_parent"
       android:text="@string/rst_send_code"
       android:textSize="13sp"
       android:textColor="@color/white"
       android:gravity="center"
       android:layout_marginLeft="10dp"
       android:background="@drawable/shape_verify_btn_normal"/>
 
   </LinearLayout>
 
   <Button
     android:id="@+id/rst_next_step"
     android:layout_width="match_parent"
     android:layout_height="40dp"
     android:layout_margin="30dp"
     android:text="@string/rst_next_step"
     android:textSize="15sp"
     android:textColor="@color/white"
     android:background="@drawable/shape_btn"/>
 
 </LinearLayout>

 // 发送成功进入倒计时
 countDownTimer = new CountDownTimerUtils(tv_send_code, 60000, 1000);
 countDownTimer.start();