Android 简单封装获取验证码倒计时功能

<resources> <declare-styleable name="CountDownButton">  <attr name="millisinfuture" format="integer"/>  <attr name="countdowninterva" format="integer"/>  <attr name="normalColor" format="color"/>  <attr name="countDownColor" format="color"/> </declare-styleable></resources>

/** * Created by xiaolong on 2018/1/12. */@SuppressLint("AppCompatCustomView")public class CountDownButton extends Button{ //总时长 private long millisinfuture; //间隔时长 private long countdowninterva; //默认背景颜色 private int normalColor; //android/233299.html">倒计时 背景颜色 private int countDownColor; //是否结束 private boolean isFinish; //定时器 private CountDownTimer countDownTimer; public CountDownButton(Context context) {  this(context,null); } public CountDownButton(Context context, AttributeSet attrs) {  this(context, attrs,0); } public CountDownButton(Context context, AttributeSet attrs, int defStyleAttr) {  super(context, attrs, defStyleAttr);  TypedArray typedArray = context.getTheme().obtainStyledAttributes(attrs, R.styleable.CountDownButton,defStyleAttr,0);  //设置默认时长  millisinfuture = (long) typedArray.getInt(R.styleable.CountDownButton_millisinfuture,60000);  //设置默认间隔时长  countdowninterva = (long)typedArray.getInt(R.styleable.CountDownButton_countdowninterva,1000);  //设置默认背景色  normalColor = typedArray.getColor(R.styleable.CountDownButton_normalColor,android.R.color.holo_blue_light);  //设置默认倒计时 背景色  countDownColor = typedArray.getColor(R.styleable.CountDownButton_countDownColor,android.R.color.darker_gray);  typedArray.recycle();  //默认为已结束状态  isFinish = true;  //字体居中  setGravity(Gravity.CENTER);  //默认文字和背景色  normalBackground();  //设置定时器  countDownTimer = new CountDownTimer(millisinfuture, countdowninterva) {   @Override   public void onTick(long millisUntilFinished) {    //未结束    isFinish = false;    setText((Math.round((double) millisUntilFinished / 1000) - 1) + "秒");    setBackgroundResource(countDownColor);   }   @Override   public void onFinish() {    //结束    isFinish = true;    normalBackground();   }  }; } private void normalBackground(){  setText("获取验证码");  setBackgroundResource(normalColor); } public boolean isFinish() {  return isFinish; } public void cancel(){  countDownTimer.cancel(); } public void start(){  countDownTimer.start(); }}

public class MainActivity extends AppCompatActivity { private CountDownButton countDownButton; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  countDownButton = ((CountDownButton) findViewById(R.id.countDownButton));  countDownButton.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View view) {    //这里判断是否倒计时结束，避免在倒计时时多次点击导致重复请求接口    if (countDownButton.isFinish()) {     //发送验证码请求成功后调用     countDownButton.start();    }   }  }); } @Override protected void onDestroy() {  super.onDestroy();  if (!countDownButton.isFinish()) {   countDownButton.cancel();  } }}