在 Android 中允许按钮在一定时间内给予积分

发布于 2024-12-12 01:47:40 字数 354 浏览 0 评论 0原文

我只看到有关如何在一定时间后执行某些操作的文章，但我想知道如何在 Android 中执行特定时间的某些操作。

    public void buttonClick(View v) {

        currentUser.changeScore(10);

        TextView tv = (TextView) findViewById(R.id.score);
        tv.setText("Score: " + currentUser.getScore());

    }

我希望用户能够在事件发生后 10 秒内按下按钮并获得积分。在那 10 秒之后，如果按下按钮，我希望用户失去 10 分。

原文

I am only seeing articles on how to do something after a certain amount of time, but I want to know how to do something FOR a certain amount of time in Android.

    public void buttonClick(View v) {

        currentUser.changeScore(10);

        TextView tv = (TextView) findViewById(R.id.score);
        tv.setText("Score: " + currentUser.getScore());

    }

I want to the user to be able to press the button and gain points for 10 seconds after an Event has occured. After those 10 seconds, I want the user to lose 10 points if the button is pressed.

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刘备忘录 2024-12-19 01:47:40

这很简单。每次事件发生时，设置一个变量，如下所示：

long positivePointEndTime = 0;

// In your event handler...
positivePointEndTime = System.currentTimeMillis() + 10000;

// Then in the button click handler
int scoreChange = System.currentTimeMillis() < positivePointEndTime ? 10 : -10;
currentUser.changeScore(scoreChange);

您并不是真的希望在该时间间隔内定期更改任何内容 - 事件只是设置一个新的时间点，如下所示何时“可以”单击按钮的边界。不需要计时器或类似的东西。

（为了可测试性，您可能需要依赖注入的 Clock 类型或类似的类型来提供“当前时间”功能，但基本原理是相同的。）

It's simple. Every time your event happens, set a variable, like this:

long positivePointEndTime = 0;

// In your event handler...
positivePointEndTime = System.currentTimeMillis() + 10000;

// Then in the button click handler
int scoreChange = System.currentTimeMillis() < positivePointEndTime ? 10 : -10;
currentUser.changeScore(scoreChange);

It's not like you're really wanting anything to change on a regular basis during that interval - the event is just setting a new point in time as the boundary of when it's "good" to click the button. No need for a timer or anything like that.

(For testability you may want to have a dependency-injected Clock type or something similar to provide the "current time" functionality, but the basic principle is the same.)

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南风起 2024-12-19 01:47:40

您可以使用计时器：

timerIsOn = true; // timerIsOn is boolean variable, must be visible for button click handler
TimerTask task = new TimerTask() {
    @Override
    public void run() {
        timerIsOn = false;
    }
};
Timer timer = new Timer();
timer.schedule(task, 10000);

然后按钮单击处理程序将是：

public void buttonClick(View v) {
    if (timerIsOn) {
        currentUser.changeScore(10);
    } else {
        // reduce score
    }
    TextView tv = (TextView) findViewById(R.id.score);
    tv.setText("Score: " + currentUser.getScore());
}

You may use Timer:

timerIsOn = true; // timerIsOn is boolean variable, must be visible for button click handler
TimerTask task = new TimerTask() {
    @Override
    public void run() {
        timerIsOn = false;
    }
};
Timer timer = new Timer();
timer.schedule(task, 10000);

Then button click handler will be:

public void buttonClick(View v) {
    if (timerIsOn) {
        currentUser.changeScore(10);
    } else {
        // reduce score
    }
    TextView tv = (TextView) findViewById(R.id.score);
    tv.setText("Score: " + currentUser.getScore());
}

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