我在我的 Android 应用程序中遇到了问题。问题是由于某种原因,我无法从我的 preferences.xml
文件中检索 ListPreference
的字符串。这是我试过的代码:
private void showUserSettings() {
SharedPreferences sharedPrefs = PreferenceManager
.getDefaultSharedPreferences(this);
try {
String feet = sharedPrefs.getString("feet", "NULL");
int intfeet = Integer.parseInt(feet);
int intinches = Integer.parseInt(sharedPrefs.getString("feet", "NULL").trim());
int weight = Integer.parseInt(sharedPrefs.getString("weight", "NULL").trim());
int age = Integer.parseInt(sharedPrefs.getString("age", "NULL").trim());
double calories;
double inches = ((intfeet * 12) + intinches);
if (gender.equals("Female")) {
//BMR = 655 + ( 4.35 x weight in pounds ) + ( 4.7 x height in inches ) - ( 4.7 x age in years )
calories = 655 + (4.35 * weight) + (4.7 * inches) - (4.7 * age);
}
else {
//66 + ( 6.23 x weight in pounds ) + ( 12.7 x height in inches ) - ( 6.8 x age in years )
calories = 66.5 + (6.23 * weight) + (12.7 * inches) - (6.8 * age);
}
//ListPreference listPreference = (ListPreference) findPreference("exercise");
//CharSequence currText = listPreference.getEntry();
String exercise = sharedPrefs.getString("exercise", "NULL").toString();
if (exercise.equals("Sedentary")) {
double sedentary = calories * 1.2;
Toast.makeText(getApplicationContext(), sedentary + "", Toast.LENGTH_LONG).show();
}
if (exercise.equals("Light")){
double light = calories * 1.375;
Toast.makeText(getApplicationContext(), light + "", Toast.LENGTH_LONG).show();
}
if (exercise.equals("Moderate")){
double moderate = calories * 1.55;
Toast.makeText(getApplicationContext(), moderate + "", Toast.LENGTH_LONG).show();
}
if (exercise.equals("Very active")) {
double veryactive = calories * 1.725;
Toast.makeText(getApplicationContext(), veryactive + "", Toast.LENGTH_LONG).show();
}
if (exercise.equals("Extra active")) {
double extraactive = calories * 1.9;
Toast.makeText(getApplicationContext(), extraactive + "", Toast.LENGTH_LONG).show();
}
else {
Toast.makeText(getApplicationContext(), "Uh oh", Toast.LENGTH_SHORT).show();
}
}catch (Exception e) {
e.printStackTrace();
}
}
每当它到达第二个 if/else 语句时,它直接转到 else 语句。我不知道为什么要这样做。我已经搜索过 SO 和谷歌,但无济于事。我基本上撞到了砖墙。非常感谢有关此问题的任何帮助。
最佳答案
您所有的练习条件都是独立的,else 仅与最后一个 if 语句相关联。使用 else if
以我相信您想要的方式将它们全部绑定(bind)在一起。
关于java - 无法从首选项(设置)中检索字符串,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/20863806/