参见英文答案 > Double value returns 0                                     3个
下面的函数从sharedpreferences,weight和height得到两个值,我用这些来计算BMI,
当我打印值的内容时,我得到了我在sharedprefs中输入的值(这很好)但是当我对它们运行除法运算时,我总是得到0作为结果..
错误在哪里？

public int computeBMI(){
    SharedPreferences customSharedPreference = getSharedPreferences(
            "myCustomSharedPrefs", Activity.MODE_PRIVATE);

    String Height = customSharedPreference.getString("heightpref", "");
    String Weight = customSharedPreference.getString("weightpref", "");

    int weight = Integer.parseInt(Weight);
    int height = Integer.parseInt(Height);
    Toast.makeText(CalculationsActivity.this, Height+" "+ Weight , Toast.LENGTH_LONG).show();

    int bmi = weight/(height*height);
    return bmi;

}

解决方法:

你正在进行整数除法.

你需要将一个操作数转换为double.