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();