为什么当我第一次点击按钮时它的跳跃2个月但是点击它后1点1然后当我点击另一个按钮时它做同样的事情。我做得不好？我粘贴所有代码，因为我不知道哪里有问题。 `
public class MainActivity extends AppCompatActivity {
static int month;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final TextView text3 = (TextView) findViewById(R.id.textView);
TextView text2 = (TextView) findViewById(R.id.textView10);
final TextView text = (TextView) findViewById(R.id.textView8);
final TextView text1 = (TextView) findViewById(R.id.textView9);
final Button button0 = (Button) findViewById(R.id.button);
final Button button1 = (Button) findViewById(R.id.button2);
final Button button2 = (Button) findViewById(R.id.button3);
final Button button3 = (Button) findViewById(R.id.button4);
final Button button4 = (Button) findViewById(R.id.button5);
final Button button5 = (Button) findViewById(R.id.button6);
final Button button6 = (Button) findViewById(R.id.button7);
final Button button7 = (Button) findViewById(R.id.button8);
final Button button8 = (Button) findViewById(R.id.button9);
final Button button9 = (Button) findViewById(R.id.button10);
final Button button10 = (Button) findViewById(R.id.button11);
final Button button11 = (Button) findViewById(R.id.button12);
final Button button12 = (Button) findViewById(R.id.button13);
final Button button13 = (Button) findViewById(R.id.button14);
final Button button14 = (Button) findViewById(R.id.button15);
final Button button15 = (Button) findViewById(R.id.button16);
final Button button16 = (Button) findViewById(R.id.button17);
final Button button17 = (Button) findViewById(R.id.button18);
final Button button18 = (Button) findViewById(R.id.button19);
final Button button19 = (Button) findViewById(R.id.button20);
final Button button20 = (Button) findViewById(R.id.button21);
final Button button21 = (Button) findViewById(R.id.button22);
final Button button22 = (Button) findViewById(R.id.button23);
final Button button23 = (Button) findViewById(R.id.button24);
final Button button24 = (Button) findViewById(R.id.button25);
final Button button25 = (Button) findViewById(R.id.button26);
final Button button26 = (Button) findViewById(R.id.button27);
final Button button27 = (Button) findViewById(R.id.button28);
final Button button28 = (Button) findViewById(R.id.button29);
final Button button29 = (Button) findViewById(R.id.button30);
final Button button30 = (Button) findViewById(R.id.button31);
final Button button31 = (Button) findViewById(R.id.button32);
final Button button32 = (Button) findViewById(R.id.button33);
final Button button33 = (Button) findViewById(R.id.button34);
final Button button34 = (Button) findViewById(R.id.button35);
final Button button35 = (Button) findViewById(R.id.button36);
final Button button36 = (Button) findViewById(R.id.button37);
Button buttonleft = (Button) findViewById(R.id.button38);
final Button buttonright = (Button) findViewById(R.id.button39);
Calendar c = Calendar.getInstance();
int Realmonth = c.get(Calendar.MONTH);
final Date date = new Date();
float jobhours = 7.5f;
float workdays = 31;
float totalhours;
final int[] realyear = {c.get(Calendar.YEAR)};
final GregorianCalendar calendar = new GregorianCalendar(realyear[0], month, 1);
int dayofweek = calendar.get(Calendar.DAY_OF_WEEK);
final int day = calendar.get(calendar.DAY_OF_WEEK);
if (Realmonth == 0) {
text.setText(getResources().getString(R.string.january));
month = 1;
}
else if (Realmonth == 1) {
text.setText(getResources().getString(R.string.February));
month = 2;
}
else if (Realmonth == 2) {
text.setText(getResources().getString(R.string.marec));
month = 3;
}
else if (Realmonth == 3) {
text.setText(getResources().getString(R.string.april));
month = 4;
}
else if (Realmonth == 4) {
text.setText(getResources().getString(R.string.may));
month = 5;
}
else if (Realmonth == 5) {
text.setText(getResources().getString(R.string.Juny));
month = 6;
}
else if (Realmonth == 6) {
text.setText(getResources().getString(R.string.jul));
month = 7;
}
else if (Realmonth == 7) {
text.setText(getResources().getString(R.string.august));
month = 8;
}
else if (Realmonth == 8) {
text.setText(getResources().getString(R.string.september));
month = 9;
}
else if (Realmonth == 9) {
text.setText(getResources().getString(R.string.oktober));
month = 10;
}
else if (Realmonth == 10) {
text.setText(getResources().getString(R.string.november));
month = 11;
}
else if (Realmonth == 11) {
text.setText(getResources().getString(R.string.december));
month = 12;
}
assert buttonleft != null;
buttonleft.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
month--;
if (month == 0) {
month = 12;
text.setText(getResources().getString(R.string.december));
realyear[0] = realyear[0] - 1;
text1.setText("" + realyear[0]);
}
else if (month == 1) {
text.setText(getResources().getString(R.string.january));
}
else if (month == 2) { text.setText(getResources().getString(R.string.February));
}
else if (month == 3) {
text.setText(getResources().getString(R.string.marec));
}
else if (month == 4) {
text.setText(getResources().getString(R.string.april));
}
else if (month == 5) {
text.setText(getResources().getString(R.string.may));
}
else if (month == 6) {
text.setText(getResources().getString(R.string.Juny));
}
else if (month == 7) {
text.setText(getResources().getString(R.string.jul));
}
else if (month == 8) {
text.setText(getResources().getString(R.string.august));
}
else if (month == 9) {
text.setText(getResources().getString(R.string.september));
}
else if (month == 10) {
text.setText(getResources().getString(R.string.oktober));
}
else if (month == 11) {
text.setText(getResources().getString(R.string.november));
}
else if (month == 12) {
text.setText(getResources().getString(R.string.december));
}
}
}
}
});
assert buttonright != null;
buttonright.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
month++;
if (month == 12) {
realyear[0] = realyear[0] + 1;
month = 0;
text.setText(getResources().getString(R.string.january));
text1.setText("" + realyear[0]);
}
else if (month == 0) {
text.setText(getResources().getString(R.string.january));
}
else if (month == 1) {
text.setText(getResources().getString(R.string.February));
}
else if (month == 2) {
text.setText(getResources().getString(R.string.marec));
}
else if (month == 3) {
text.setText(getResources().getString(R.string.april));
}
else if (month == 4) {
text.setText(getResources().getString(R.string.may));
}
else if (month == 5) {
text.setText(getResources().getString(R.string.Juny));
}
else if (month == 6) {
text.setText(getResources().getString(R.string.jul));
}
else if (month == 7) {
text.setText(getResources().getString(R.string.august));
}
else if (month == 8) {
text.setText(getResources().getString(R.string.september));
}
else if (month == 9) {
text.setText(getResources().getString(R.string.oktober));
}
else if (month == 10) {
text.setText(getResources().getString(R.string.november));
}
else if (month == 11) {
text.setText(getResources().getString(R.string.december));
}
}
});
if (month == 2)
{
if (realyear[0] % 4 == 0) {
workdays = 29;
}
workdays = 28;
totalhours = jobhours * workdays;
text2.setText("Odrobené hodiny:" + totalhours);
}
else if (month == 6) {
workdays = 30;
totalhours = jobhours * workdays;
text2.setText("Odrobené hodiny:" + totalhours);
}
else if (month == 9) {
workdays = 30;
totalhours = jobhours * workdays;
text2.setText("Odrobené hodiny:" + totalhours);
}
else if (month == 11) {
workdays = 30;
totalhours = jobhours * workdays;
text2.setText("Odrobené hodiny:" + totalhours);
}
else {
workdays = 31;
totalhours = jobhours * workdays;
text2.setText("Odrobené hodiny:" + totalhours);
}
}
}`
答案 0 :(得分：1)
这是因为“GregorianCalendar”甚至“Date”类的月份为0，而不是1。即0到11。
在您的代码中：
int Realmonth = c.get(Calendar.MONTH);
将其更改为：
int Realmonth = c.get(Calendar.MONTH)+1;
就是这样。从第一次点击开始，月份将逐一改变。
答案 1 :(得分：0)
我自己解决了Avinash有点真实我必须在0到1之间改变每一个值。