Question

我制作了一个有关android饮水监控器的应用。但是，以百分比为单位的计算错误。您认为我可能做错了什么。（当进度条在100处是100时，每日水量计算是错误的）

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，您的代码editor.apply();的工作方式如下：

您试图保存进度，有时会连续多次被调用。根据{{3}}，如果您要发送多个apply()或commit()命令，则仅执行最后一个命令。因此，某些点击可能不会被处理。

我建议您仅更改变量以获取进度，然后再保存它：

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onPause()函数中保存它们：

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

如果不希望将百分比四舍五入，可以将putInt更改为putFloat，将getInt更改为getFloat

如何计算每日饮用水的ProgressBar百分比

1 个答案: