Android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();