想在Android端短视频程序中获得验证码倒计时控件的方式有两种
第一种方式:
使用Timer和Handler的方式实现倒计时功能
1.初始化时间
/**
* 初始化时间
*/
private void initTimer() {
mAllTotalTime = mTotaltime;
mTimer = new Timer();
mTimerTask = new TimerTask() {
@Override
public void run() {
mHandler.sendEmptyMessage(COUNT_TIME);
}
};
}
2.通过handler开始时间倒计时
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case COUNT_TIME:
// 对秒数进行格式化
DecimalFormat df = new DecimalFormat("#00");
String strTotaltime = df.format(mAllTotalTime / 1000);
String runtimeText = mPrefixRuntext + strTotaltime + mSuffixRuntext;
// 对秒数进行颜色设置
Spannable spannable = new SpannableString(runtimeText);
ForegroundColorSpan redSpan = new ForegroundColorSpan(mColor);
spannable.setSpan(redSpan, mPrefixRuntext.length(), mPrefixRuntext.length() + strTotaltime.length(),
Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
CountDownTextView.this.setText(spannable);
mAllTotalTime -= mOnetime;
if (mAllTotalTime < 0) {
CountDownTextView.this.setText(mFinishtext);
isRun = false;
clearTimer();
mDownTime.onFinish();
}
break;
default:
break;
}
}
};
第二种方式:
使用Rxjava和RxBinding
添加依赖
//Rxjava
implementation 'io.reactivex.rxjava2:rxjava:2.1.1'
implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'
//Rxbinding
implementation 'com.jakewharton.rxbinding2:rxbinding:2.0.0'
implementation 'com.jakewharton.rxbinding2:rxbinding-support-v4:2.0.0'
implementation 'com.jakewharton.rxbinding2:rxbinding-appcompat-v7:2.0.0'
实现方式:
private void initTimer() {
mObservableCountTime = RxView.clicks(mTvTime).throttleFirst(1, TimeUnit.SECONDS)
.subscribeOn(AndroidSchedulers.mainThread())
.flatMap(new Function<Object, ObservableSource<Boolean>>() {
@Override
public ObservableSource<Boolean> apply(Object o) throws Exception {
if (TextUtils.isEmpty(getPhone())) {
return Observable.empty();
}
return Observable.just(true);
}
})
.flatMap(new Function<Boolean, ObservableSource<Long>>() {
@Override
public ObservableSource<Long> apply(Boolean aBoolean) throws Exception {
//更新发送按钮的状态并初始化显现倒计时文字
mTvTime.setEnabled(false);
RxView.enabled(mTvTime).accept(false);
RxTextView.text(mTvTime).accept(mPrefixRuntext + mTotaltime + mSuffixRuntext);
//在实际操作中可以在此发送获取网络的请求
mDownTime.onTimerClick();
return Observable.interval(1, TimeUnit.SECONDS, Schedulers.io())
.take(mTotaltime)
//将递增数字替换成递减的倒计时数字
.map(new Function<Long, Long>() {
@Override
public Long apply(Long aLong) throws Exception {
return mTotaltime - (aLong + 1);
}
});
}
}).observeOn(AndroidSchedulers.mainThread());
mConsumerCountTime = new Consumer<Long>() {
@Override
public void accept(Long aLong) throws Exception {
//当倒计时为 0 时,还原 btn 按钮
if (aLong == 0) {
mTvTime.setEnabled(true);
RxView.enabled(mTvTime).accept(true);
RxTextView.text(mTvTime).accept(mFinishtext);
} else {
mTvTime.setEnabled(false);
RxTextView.text(mTvTime).accept(mPrefixRuntext + aLong + mSuffixRuntext);
}
}
};
//订阅
mDisposable = mObservableCountTime.subscribe(mConsumerCountTime);
}