我已经创建了 3 个不同的数字选择器，我正在使用选择的 3 个不同的数字进行计算，但不知道为什么它不会在 totalP textView 中显示总和。这2行是错的吗？"sum =(a*4)+(b*4)+(c*9); "和 "totalP.setText(sum+" cal");"
public TextView carb;
public TextView protein;
public TextView fat;
public TextView totalP;
int carbNum,proteinNum,fatNum,cpv,ppv,fpv;
int sum,a,b,c;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_adjust_macronutrients);
Bundle extras = getIntent().getExtras();
carb = (TextView) findViewById(R.id.carbsNum);
carbNum = extras.getInt("Carb");
carb.setText(carbNum+" g");
protein = (TextView) findViewById(R.id.proteinNum);
proteinNum = extras.getInt("Protein");
protein.setText(proteinNum+" g");
fat = (TextView) findViewById(R.id.fatNum);
fatNum = extras.getInt("Fat");
fat.setText(fatNum+" g");
cpv=extras.getInt("carbP");
ppv=extras.getInt("proteinP");
fpv=extras.getInt("fatP");
totalP=(TextView) findViewById(R.id.totalPercentage);
final NumberPicker np1 = (NumberPicker) findViewById(R.id.carbPercentage);
final NumberPicker np2 = (NumberPicker) findViewById(R.id.proteinPercentage);
final NumberPicker np3 = (NumberPicker) findViewById(R.id.fatPercentage);
np1.setMaxValue(1000);
np1.setMinValue(0);
np1.setValue(carbNum);
np1.setWrapSelectorWheel(true);
np1.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
a =np1.getValue();;
carb.setText(a + " g");
}
});
np2.setMaxValue(1000);
np2.setMinValue(0);
np2.setValue(proteinNum);
np2.setWrapSelectorWheel(true);
np2.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
b = np2.getValue();
protein.setText(b + " g");
}
});
np3.setMaxValue(1000);
np3.setMinValue(0);
np3.setValue(fatNum);
np3.setWrapSelectorWheel(true);
np3.setOnValueChangedListener(new NumberPicker.OnValueChangeListener() {
@Override
public void onValueChange(NumberPicker picker, int oldVal, int newVal) {
c = np3.getValue();
fat.setText(c + " g");
}
});
sum =(a*4)+(b*4)+(c*9);
// this line cant work, is because the a,b,c ??
totalP.setText(sum+" cal");
// this line cant work ??
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
}
}