Android自定义Chronometer实现短信验证码秒表倒计时功能

概述本文实例为大家分享了Chronometer实现倒计时功能，Android提供了实现按照秒计时的API，供大家参考，具体内容如下

本文实例为大家分享了Chronometer实现倒计时功能，AndroID提供了实现按照秒计时的API，供大家参考，具体内容如下

一、自定义ChronometerVIEw 继续自TextVIEw

主要原理：先设置一个基准倒计时时间mBaseSeconds，内置handler 每隔1s发送一个空消息，mRemainSeconds--，同时刷新界面视图，回调给外部调用者，只到为零。外部调用者可通过start()/pause()/stop()来控制计时器的工作状态。
可以app中发送短信验证码的场景为例，做了一个很粗糙的界面，但功能都实现了。

/**  * @name 倒计时器（类似妙表倒数计时，支持暂停、停止、重新开始）  * @author Fanjb  * @date 2015年11月6日  */ public class ChronometerVIEw extends TextVIEw {   /**  * A callback that notifIEs when the chronometer has decremented on its own.  *  * @author Fanjb  */  public interface OnTickchangelistener {   /**   * remain seconds changed   *   * @param vIEw   * @param remainSeconds   */  public voID onTickChanged(ChronometerVIEw vIEw,long remainSeconds);  }   private long mBase;  private long mRemainSeconds;  private boolean mStarted;  private boolean mReStart;  private boolean mVisible;  private boolean mIsEnable;   private OnTickchangelistener mTickListener;   public ChronometerVIEw(Context context) {  this(context,null);  }   public ChronometerVIEw(Context context,AttributeSet attrs) {  super(context,attrs,0);  }   public ChronometerVIEw(Context context,AttributeSet attrs,int defStyleAttr) {  super(context,defStyleAttr);  updateText(mRemainSeconds);  }   @OverrIDe  protected voID onWindowVisibilityChanged(int visibility) {  super.onWindowVisibilityChanged(visibility);  mVisible = visibility == VISIBLE;  updateStatus();  }   @OverrIDe  protected voID onDetachedFromWindow() {  super.onDetachedFromWindow();  mVisible = false;  updateStatus();  }   /**  * 启动计时器  */  public voID start() {  if (mReStart && !mStarted) {   mRemainSeconds = mBase;  }  mStarted = true;  updateStatus();  }   /**  * 暂停计时器  */  public voID pause() {  if (mStarted) {   mStarted = mReStart = false;   updateStatus();  }  }   /**  * 停止计时器，再次调用 start()重新启动  */  public voID stop() {  mStarted = false;  mReStart = true;  updateStatus();  updateText(mRemainSeconds = 0);  dispatchTickListener();  }   /**  * 刷新内部状态  */  private voID updateStatus() {  boolean isEnable = mVisible && mStarted;  if (mIsEnable != isEnable) {   if (isEnable) {   mHandler.sendMessage(Message.obtain(mHandler,TICK_WHAT));   } else {   mHandler.removeMessages(TICK_WHAT);   }   mIsEnable = isEnable;  }  }   private static final int TICK_WHAT = 1;   private Handler mHandler = new Handler() {  public voID handleMessage(androID.os.Message msg) {   if (mRemainSeconds > 0) {   updateText(--mRemainSeconds);   dispatchTickListener();   sendMessageDelayed(Message.obtain(this,TICK_WHAT),1000);   }  }  };   private voID updateText(long Now) {  String text = DateUtils.formatelapsedtime(Now);  setText(text);  }   /**  * 在未启动状态下设置开始倒计时时间  *  * @param baseSeconds  */  public voID setBaseSeconds(long baseSeconds) {  if (baseSeconds > 0 && baseSeconds != mBase && !mStarted) {   mBase = mRemainSeconds = baseSeconds;   updateText(mRemainSeconds);  }  }   /**  * 剩余时间  *  * @return  */  public long getRemainSeconds() {  return mRemainSeconds;  }   public voID setonTickchangelistener(OnTickchangelistener Listener) {  mTickListener = Listener;  }   public OnTickchangelistener getTickListener() {  return mTickListener;  }   private voID dispatchTickListener() {  if (mTickListener != null) {   mTickListener.onTickChanged(this,getRemainSeconds());  }  }   @OverrIDe  public voID onInitializeAccessibilityEvent(AccessibilityEvent event) {  super.onInitializeAccessibilityEvent(event);  event.setClassname(ChronometerVIEw.class.getname());  }   @OverrIDe  public voID onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {  super.onInitializeAccessibilityNodeInfo(info);  info.setClassname(Chronometer.class.getname());  } }

 二、xml 中没有加入自定义的控件属性，同TextVIEw

<linearLayout  androID:layout_wIDth="wrap_content"  androID:layout_height="wrap_content"  androID:orIEntation="horizontal" >   <com.freedoman.Widgets.calendar.ChronometerVIEw   androID:ID="@+ID/chronometer_vIEw"   androID:layout_wIDth="wrap_content"   androID:layout_height="wrap_content"   androID:layout_marginleft="5dp"   androID:background="@drawable/chronometer_vIEw_bg"   androID:enabled="true"   androID:text="00:00" />   <button   androID:ID="@+ID/start_chronometer_vIEw_btn"   androID:layout_wIDth="wrap_content"   androID:layout_height="wrap_content"   androID:layout_marginleft="5dp"   androID:text="Start" />   <button   androID:ID="@+ID/pause_chronometer_vIEw_btn"   androID:layout_wIDth="wrap_content"   androID:layout_height="wrap_content"   androID:layout_marginleft="5dp"   androID:text="Pause" />   <button   androID:ID="@+ID/stop_chronometer_vIEw_btn"   androID:layout_wIDth="wrap_content"   androID:layout_height="wrap_content"   androID:layout_marginleft="5dp"   androID:text="Stop" />  </linearLayout> 

三、在Activity中做一个简单的测试（可以发送短信验证码的实际应用场景为例）

public class Chronometeractivity extends Activity {   private ChronometerVIEw mChronometerVIEw;   @OverrIDe  protected voID onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentVIEw(R.layout.activity_clock);   // 自定义计时器  if (mChronometerVIEw == null) {   mChronometerVIEw = (ChronometerVIEw) findVIEwByID(R.ID.chronometer_vIEw);   mChronometerVIEw.setBaseSeconds(60);   mChronometerVIEw.setonTickchangelistener(new OnTickchangelistener() {   @OverrIDe   public voID onTickChanged(ChronometerVIEw vIEw,long curTimeMills) {    System.out.println(curTimeMills);    vIEw.setEnabled(curTimeMills == 0 || curTimeMills == 60);    if (curTimeMills == 0) {    mChronometerVIEw.setText("重新发送");    }   }   });   mChronometerVIEw.setText("点击发送验证码");  }  findVIEwByID(R.ID.start_chronometer_vIEw_btn).setonClickListener(mClickListener);  findVIEwByID(R.ID.pause_chronometer_vIEw_btn).setonClickListener(mClickListener);  findVIEwByID(R.ID.stop_chronometer_vIEw_btn).setonClickListener(mClickListener);  }   private VIEw.OnClickListener mClickListener = new OnClickListener() {   @OverrIDe  public voID onClick(VIEw v) {   switch (v.getID()) {    case R.ID.start_chronometer_vIEw_btn:   if (mChronometerVIEw != null) {    mChronometerVIEw.start();   }   break;    case R.ID.pause_chronometer_vIEw_btn:   if (mChronometerVIEw != null) {    mChronometerVIEw.pause();   }   break;    case R.ID.stop_chronometer_vIEw_btn:   if (mChronometerVIEw != null) {    mChronometerVIEw.stop();   }   break;   }  }  }; } 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程小技巧。

总结

以上是内存溢出为你收集整理的Android自定义Chronometer实现短信验证码秒表倒计时功能全部内容，希望文章能够帮你解决Android自定义Chronometer实现短信验证码秒表倒计时功能所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。