Android自定义控件实现验证码倒计时

<com.landptf.view.countdownm
 android:id="@+id/cdm_identifying_code"
 android:layout_width="wrap_content"
 android:layout_height="50dp"
 android:layout_alignparentright="true"
 android:text="获取验证码"
 landptf:backcolor="@color/colorprimary"
 landptf:countdownseconds="10"/>

countdownm cdmidentifyingcode = (countdownm) findviewbyid(r.id.cdm_identifying_code);
if (cdmidentifyingcode != null) {
 cdmidentifyingcode.setonclicklistener(new countdownm.onclicklistener() {
  @override
  public void onclick(view v) {
   toast.maketext(countdownmtestactivity.this, "验证码发送成功", toast.length_short).show();
  }
 });
}

/**
 * created by landptf on 2017/03/15.
 * 获取验证码倒计时控件
 */
public class countdownm extends buttonm {

 private onclicklistener onclicklistener = null;
 private countdowntimer countdowntimer;
 /**
  * 倒计时总时长
  */
 private int countdownseconds = 60;
 /**
  * 按钮的背景色
  */
 private int backcolor = 0;

 public interface onclicklistener{
  void onclick(view v);
 }

 public countdownm(context context) {
  this(context, null);
 }

 public countdownm(context context, attributeset attrs) {
  this(context, attrs, 0);
 }

 public countdownm(context context, attributeset attrs, int defstyle) {
  super(context, attrs, defstyle);
  typedarray a = context.obtainstyledattributes(attrs, r.styleable.countdownm, defstyle, 0);
  if (a != null) {
   //设置背景色
   colorstatelist colorlist = a.getcolorstatelist(r.styleable.countdownm_backcolor);
   if (colorlist != null) {
    backcolor = colorlist.getcolorforstate(getdrawablestate(), 0);
    if (backcolor != 0) {
     setbackcolor(backcolor);
    }
   } else {
    setbackcolor(getresources().getcolor(r.color.maincolor));
   }
   //获取倒计时总时长
   int countdownseconds = a.getinteger(r.styleable.countdownm_countdownseconds, 60);
   setcountdownseconds(countdownseconds);
   a.recycle();
  }
  //设置文字颜色
  settextcolor(getresources().getcolor(android.r.color.white));
  //设置位置相关属性
  setgravity(gravity.center);
  setpadding(convertm.dp2px(context, 8), 0, convertm.dp2px(context, 8), 0);
  setonclicklistener(new view.onclicklistener() {
   @override
   public void onclick(view v) {
    if (onclicklistener != null) {
     onclicklistener.onclick(v);
    }
    //点击后开始计时
    start();
   }
  });
 }

 /**
  * 设置倒计时总时长
  * @param countdownseconds
  */
 public void setcountdownseconds(int countdownseconds){
  this.countdownseconds = countdownseconds;
 }

 /**
  * 设置背景色
  * @param backcolor
  */
 @override
 public void setbackcolor(int backcolor) {
  this.backcolor = backcolor;
  super.setbackcolor(backcolor);
 }

 /**
  * 停止倒计时
  */
 public void stop(){
  countdowntimer.cancel();
  resetbutton();
 }

 public void setonclicklistener(onclicklistener l){
  this.onclicklistener = l;
 }

 private void start(){
  setenabled(false);//设置不能点击
  countdowntimer = new countdowntimer(countdownseconds * 1000, 1000) {
   @override
   public void ontick(long millisuntilfinished) {
    settext(millisuntilfinished / 1000 + getresources().getstring(r.string.count_down_m_recapture_after));//设置倒计时时间
    //设置按钮为灰色，这时是不能点击的
    countdownm.super.setbackcolor(color.gray);
    spannable span = new spannablestring(gettext().tostring());//获取按钮的文字
    span.setspan(new foregroundcolorspan(color.red), 0, 2, spannable.span_inclusive_exclusive);//讲倒计时时间显示为红色
    settext(span);
   }

   @override
   public void onfinish() {
    resetbutton();
   }
  };
  countdowntimer.start();
 }

 private void resetbutton(){
  settext(getresources().getstring(r.string.count_down_m_recapture));
  setenabled(true);//重新获得点击
  if (backcolor != 0) {
   setbackcolor(backcolor);//还原背景色
  } else {
   setbackcolor(getresources().getcolor(r.color.maincolor));//还原背景色
  }
 }
}