计时器

第一种自定义一个TimeCount

 

public class TimeCount extends CountDownTimer {

    private Button button;

    //参数依次为总时长,和计时的时间间隔
    public TimeCount(Button button, long millisInFuture, long countDownInterval) {
        super(millisInFuture, countDownInterval);
        this.button = button;
    }

    //计时过程显示
    @Override
    public void onTick(long millisUntilFinished) {
        String time = "(" + millisUntilFinished / 1000 + ")秒";
        setButtonInfo(time, "#c1c1c1", false);
    }

    //计时完毕时触发
    @Override
    public void onFinish() {
        setButtonInfo("重新获取", "#f95353", true);
    }

    /**
     * 验证按钮在点击前后相关设置
     *
     * @param content 要显示的内容
     * @param color   颜色值
     * @param isClick 是否可点击
     */
    private void setButtonInfo(String content, String color, boolean isClick) {
        button.setText(content);
        button.setBackgroundColor(Color.parseColor(color));
        button.setClickable(isClick);
    }
}

 

private TimeCount timeCount;

 

@Override
protected void onResume() {
    super.onResume();
    timeCount = new TimeCount(btn1, 10000, 1000);
}

private void timer1() {
    timeCount.start();
}

@Override
protected void onDestroy() {
    super.onDestroy();
    timeCount.cancel();
    cancel();
}

 

第二种使用Handler

 

 

/**
 * 第二种方式：使用Handler
 * 

 * 静态内部类：避免内存泄漏
 */
private static class MyHandler extends Handler {

    private final WeakReference weakReference;

    public MyHandler(MainActivity activity) {
        weakReference = new WeakReference(activity);
    }

    @Override
    public void handleMessage(Message msg) {
        super.handleMessage(msg);
        MainActivity activity = weakReference.get();
        if (activity != null) {
            switch (msg.what) {
                case 0:
                    if (msg.arg1 == 0) {
                        btn2.setText("重新获取");
                        btn2.setBackgroundColor(Color.parseColor("#f95353"));
                        btn2.setClickable(true);
                    } else {
                        btn2.setText("(" + msg.arg1 + ")秒");
                        btn2.setBackgroundColor(Color.parseColor("#c1c1c1"));
                        btn2.setClickable(false);
                    }
                    break;
            }
        }
    }
}

/**
 * 监听按钮下直接调用即可
 */
private void sendMessageClick() {
    new Thread(new Runnable() {
        @Override
        public void run() {
            for (int i = 9; i >= 0; i--) {
                Message msg = myHandler.obtainMessage();
                msg.arg1 = i;
                myHandler.sendMessage(msg);
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }).start();
}

第三种使用Rxjava

 

/**
 * 每隔milliseconds毫秒后执行next操作
 *
 * @param seconds
 */
private void startCount(long seconds) {
    Observable.interval(0, seconds, TimeUnit.SECONDS)
            .map(new Function() {
                @Override
                public Long apply(Long aLong) throws Exception {
                    return 10 - aLong.longValue();
                }
            })
            .take(11)//设置循环次数
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(new Observer() {
                @Override
                public void onSubscribe(@NonNull Disposable disposable) {
                    mDisposable = disposable;
                }

                @Override
                public void onNext(@NonNull Long number) {//从0开始
                    btn3.setText("(" + number + ")秒");
                    btn3.setBackgroundColor(Color.parseColor("#c1c1c1"));
                    btn3.setClickable(false);
                }

                @Override
                public void onError(@NonNull Throwable e) {
                    cancel();
                }

                @Override
                public void onComplete() {
                    btn3.setText("重新获取");
                    btn3.setBackgroundColor(Color.parseColor("#f95353"));
                    btn3.setClickable(true);
                }
            });
}

第四种：

Flowable.intervalRange(0, remain, 0, 1, TimeUnit.SECONDS)
        .observeOn(AndroidSchedulers.mainThread())
        .doOnNext(new Consumer() {
            @Override
            public void accept(Long aLong) throws Exception {
                long left = remain - aLong;
                long hh = left / 3600;
                long mm = (left % 3600) / 60;
                long ss = (left % 3600) % 60;
                String time = topTitle + " "
                        + String.format("%02d", hh) + ":"
                        + String.format("%02d", mm) + ":"
                        + String.format("%02d", ss);
                bd.tvTimer.setText(time);
            }
        })
        .doOnComplete(new Action() {
            @Override
            public void run() throws Exception {
                //Log.d(TAG, "倒计时完毕");
            }
        })
        .subscribe();