1 public class CountDownTimerUtils extends CountDownTimer {
 2   private TextView mTextView;
 3   
 4   /** 
 5    * @param textView     The TextView 
 6    * 
 7    * 
 8    * @param millisInFuture  The number of millis in the future from the call 
 9    *             to {@link #start()} until the countdown is done and {@link #onFinish()} 
10    *             is called. 
11    * @param countDownInterval The interval along the way to receiver 
12    *             {@link #onTick(long)} callbacks. 
13    */
14   public CountDownTimerUtils(TextView textView, long millisInFuture, long countDownInterval) { 
15     super(millisInFuture, countDownInterval); 
16     this.mTextView = textView; 
17   }
18  
19   /**
20    * 倒计时期间会调用
21    * @param millisUntilFinished
22    */
23   @Override
24   public void onTick(long millisUntilFinished) { 
25     mTextView.setClickable(false); //设置不可点击 
26     mTextView.setText(millisUntilFinished / 1000 + "秒"); //设置倒计时时间
27     mTextView.setBackgroundResource(R.drawable.shape_verify_btn_press); //设置按钮为灰色，这时是不能点击的
28   
29     SpannableString spannableString = new SpannableString(mTextView.getText().toString()); //获取按钮上的文字
30     ForegroundColorSpan span = new ForegroundColorSpan(Color.RED);
31     /** 
32      * public void setSpan(Object what, int start, int end, int flags) { 
33      * 主要是start跟end，start是起始位置,无论中英文，都算一个。 
34      * 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。 
35      */
36     spannableString.setSpan(span, 0, 2, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);//将倒计时的时间设置为红色
37     mTextView.setText(spannableString); 
38   }
39  
40   /**
41    * 倒计时完成后调用
42    */
43   @Override
44   public void onFinish() { 
45     mTextView.setText("重新获取验证码"); 
46     mTextView.setClickable(true);//重新获得点击 
47     mTextView.setBackgroundResource(R.drawable.shape_verify_btn_normal); //还原背景色
48   } 
49 } 

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <shape xmlns:android="http://schemas.android.com/apk/res/android"
 3   android:shape="rectangle" >
 4  
 5   <!-- 填充的颜色：这里设置背景透明 -->
 6   <solid android:color="@color/maincolor" />
 7   <!-- 边框的颜色 ：不能和窗口背景色一样-->
 8   <stroke
 9     android:width="1dp"
10     android:color="@color/white" />
11   <!-- 设置按钮的四个角为弧形 -->
12   <!-- android:radius 弧形的半径 -->
13   <corners android:radius="5dip" />
14  
15   <!-- padding：Button里面的文字与Button边界的间隔 -->
16   <padding
17     android:bottom="5dp"
18     android:left="5dp"
19     android:right="5dp"
20     android:top="5dp" />
21 </shape>

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <shape xmlns:android="http://schemas.android.com/apk/res/android"
 3   android:shape="rectangle" >
 4  
 5   <!-- 填充的颜色：这里设置背景透明 -->
 6   <solid android:color="@color/graywhite" />
 7   <!-- 边框的颜色 ：不能和窗口背景色一样-->
 8   <stroke
 9     android:width="1dp"
10     android:color="@color/white" />
11   <!-- 设置按钮的四个角为弧形 -->
12   <!-- android:radius 弧形的半径 -->
13   <corners android:radius="5dip" />
14  
15   <!-- padding：Button里面的文字与Button边界的间隔 -->
16   <padding
17     android:bottom="5dp"
18     android:left="5dp"
19     android:right="5dp"
20     android:top="5dp" />
21 </shape>

 1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 2   android:orientation="vertical"
 3   android:layout_width="match_parent"
 4   android:layout_height="match_parent"
 5   android:background="@drawable/login_bg">
 6  
 7   <EditText
 8     android:id="@+id/rst_phone_number"
 9     android:layout_width="match_parent"
10     android:layout_height="40dp"
11     android:inputType="phone"
12     android:hint="@string/phone_number"
13     android:textSize="16sp"
14     android:textColor="@color/black"
15     android:singleLine="true"
16     android:background="@drawable/shape_form"
17     android:textCursorDrawable="@drawable/text_cursor"
18     android:layout_marginLeft="30dp"
19     android:layout_marginRight="30dp"
20     android:layout_marginTop="30dp"
21     android:layout_gravity="center_vertical"/>
22  
23   <LinearLayout
24     android:layout_width="match_parent"
25     android:layout_height="40dp"
26     android:layout_marginLeft="30dp"
27     android:layout_marginRight="30dp"
28     android:layout_marginTop="15dp"
29     android:orientation="horizontal">
30  
31     <EditText
32       android:id="@+id/rst_verify_code"
33       android:layout_width="wrap_content"
34       android:layout_height="match_parent"
35       android:layout_weight="1"
36       android:inputType="number"
37       android:hint="@string/rst_verify_code"
38       android:textSize="16sp"
39       android:textColor="@color/black"
40       android:singleLine="true"
41       android:background="@drawable/shape_form"
42       android:textCursorDrawable="@drawable/text_cursor" />
43  
44     <TextView
45       android:id="@+id/rst_send_code"
46       android:layout_width="130dp"
47       android:layout_height="match_parent"
48       android:text="@string/rst_send_code"
49       android:textSize="13sp"
50       android:textColor="@color/white"
51       android:gravity="center"
52       android:layout_marginLeft="10dp"
53       android:background="@drawable/shape_verify_btn_normal"/>
54  
55   </LinearLayout>
56  
57   <Button
58     android:id="@+id/rst_next_step"
59     android:layout_width="match_parent"
60     android:layout_height="40dp"
61     android:layout_margin="30dp"
62     android:text="@string/rst_next_step"
63     android:textSize="15sp"
64     android:textColor="@color/white"
65     android:background="@drawable/shape_btn"/>
66  
67 </LinearLayout>

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