如何计算每日饮用水的 ProgressBar 百分比

Question

我制作了一个关于 android 饮水监测器的应用程序。但它以百分比计算错误。你认为我可能做错了什么。（当进度条100到100时，每日水计算错误）

waterml = sharedPreferences.getInt(WATER_ML, 0);
waterdata = sharedPreferences.getInt(WATER_DATA, 0);
int dailywater = 2838; // example        
ml100.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
       //scale 100 ml
        int percent = 100  * 100 / dailywater;
        ProgressBarAnimation anim = new ProgressBarAnimation(circlebar, waterdata, (waterdata + percent));
        anim.setDuration(300);
        circlebar.startAnimation(anim);
        dailywater.setText((waterml + 100) + " / " + dailywater + " ml");
        editor = sharedPreferences.edit();
        editor.putInt(WATER_DATA, (waterdata + percent));
        editor.putInt(WATER_ML, (waterml + 100));
        editor.apply();
    }
});
////
public static class ProgressBarAnimation extends Animation {
    private CircleProgressBar progressBar;
    private float from;
    private float to;
    ProgressBarAnimation(CircleProgressBar progressBar, float from, float to) {
        super();
        this.progressBar = progressBar;
        this.from = from;
        this.to = to;
    }
    @Override
    protected void applyTransformation(float interpolatedTime, Transformation t) {
        super.applyTransformation(interpolatedTime, t);
        float value = from + (to - from) * interpolatedTime;
        progressBar.setProgress((int) value);
    }
}

Answer 1

在我看来你的代码，即 editor.apply(); 的工作方式如下：

您正在尝试保存进度，有时会连续调用多次。根据 documentation，如果您要发送多个 apply() 或 commit() 命令，则只会执行最后一个命令。因此，某些点击可能不会被处理。

我建议您只需更改进度变量并稍后保存：

waterml = sharedPreferences.getInt(WATER_ML, 0);
waterdata = sharedPreferences.getInt(WATER_DATA, 0);
int dailywater = 2838; // example        
ml100.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        //scale 100 ml
        int percent = 100  * 100 / dailywater;
        ProgressBarAnimation anim = new ProgressBarAnimation(circlebar, waterdata, (waterdata + percent));
        anim.setDuration(300);
        circlebar.startAnimation(anim);
        dailywater.setText((waterml + 100) + " / " + dailywater + " ml");

        waterdata += percent;
        waterml += 100;
    }
});

然后在您的 onPause() 函数中您只需保存它们：

public void onPause() {
    editor = sharedPreferences.edit();
    editor.putInt(WATER_DATA, waterdata);
    editor.putInt(WATER_ML, waterml);
    editor.apply();
}

如果您不希望您的百分比四舍五入，您可以将 putInt 更改为 putFloat 并将 getInt 更改为 getFloat

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