我已经构建了一个应用程序，当我点击TextView时，我会在TextView中获得天数差异。我通过搜索谷歌这样做了。但现在我希望结果应该自动显示在TextView中。我已将TextView的ID设为自动显示结果，ID为 no_of_days 。
我的代码是：
public class Leave extends AppCompatActivity {
TextView date;
private DatePickerDialog datePickerDialog;
//TextView date2;
//TextView setDay;
private DatePickerDialog datePickerDialog2;
TextView no_of_days;
String date1 = "", date2 = "";
private TextView strdate2;
private TextView strdate;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_leave);
strdate = (TextView) findViewById(R.id.date);
strdate2 = (TextView) findViewById(R.id.date2);
//setDay = (TextView) findViewById(R.id.setDay);
no_of_days = (TextView) findViewById(R.id.no_of_days);
final RadioButton radio_full = (RadioButton) findViewById(R.id.radio_full);
final RadioButton radio_Half = (RadioButton) findViewById(R.id.radio_Half);
RadioGroup radioGroup = (RadioGroup) findViewById(R.id.radioleave);
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
int buttonId = radioGroup.getCheckedRadioButtonId();
switch (buttonId) {
case R.id.radio_full:
Toast.makeText(getApplicationContext(), "You have selected Full Day Leave", Toast.LENGTH_SHORT).show();
break;
case R.id.radio_Half:
Toast.makeText(getApplicationContext(), "You have selected Half Day Leave", Toast.LENGTH_SHORT).show();
break;
}
}
});
// initially hide the radio buttons
radio_full.setVisibility(View.GONE);
radio_Half.setVisibility(View.GONE);
// initiate the date picker and a button
strdate= (TextView) findViewById(R.id.date);
// perform click event on edit text
strdate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// calender class's instance and get current date , month and year from calender
final Calendar c = Calendar.getInstance();
int mYear = c.get(Calendar.YEAR); // current year
int mMonth = c.get(Calendar.MONTH); // current month
int mDay = c.get(Calendar.DAY_OF_MONTH); // current day
// date picker dialog
datePickerDialog = new DatePickerDialog(Leave.this,
new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year,
int monthOfYear, int dayOfMonth) {
// set day of month , month and year value in the edit text
// assign the value to date1
date1 = dayOfMonth + "/"
+ (monthOfYear + 1) + "/" + year;
strdate.setText(dayOfMonth + "/"
+ (monthOfYear + 1) + "/" + year);
// check if date2 has been set and compare it with date1
if (!TextUtils.isEmpty(date2)) {
// get difference
getDifferenceDays(date, date2 );
if(date1.equals(date2)) {
// pop up radio button
radio_full.setVisibility(View.VISIBLE);
radio_Half.setVisibility(View.VISIBLE);
} else {
// hide radio buttons
radio_full.setVisibility(View.GONE);
radio_Half.setVisibility(View.GONE);
}
}
}
}, mYear, mMonth, mDay);
datePickerDialog.show();
}
});
// initiate the date picker and a button
strdate2 = (TextView) findViewById(R.id.date2);
// perform click event on edit text
strdate2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// calender class's instance and get current date , month and year from calender
final Calendar c = Calendar.getInstance();
int mYear = c.get(Calendar.YEAR); // current year
int mMonth = c.get(Calendar.MONTH); // current month
int mDay = c.get(Calendar.DAY_OF_MONTH); // current day
// date picker dialog
datePickerDialog2 = new DatePickerDialog(Leave.this,
new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year,
int monthOfYear, int dayOfMonth) {
// set day of month , month and year value in the edit text
// assign the value to date2
date2 = dayOfMonth + "/"
+ (monthOfYear + 1) + "/" + year;
strdate2.setText(dayOfMonth + "/"
+ (monthOfYear + 1) + "/" + year);
// check if date2 has been set and compare it with date1
if (!TextUtils.isEmpty(date1)) {
// get difference
getDifferenceDays(date, date2);
if(date1.equals(date2)) {
// pop up radio button
radio_full.setVisibility(View.VISIBLE);
radio_Half.setVisibility(View.VISIBLE);
} else {
// hide radio buttons
radio_full.setVisibility(View.GONE);
radio_Half.setVisibility(View.GONE);
}
}
}
}, mYear, mMonth, mDay);
datePickerDialog2.show();
}
});
no_of_days.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SimpleDateFormat format = new SimpleDateFormat("dd/mm/yyyy");
String date01 = strdate.getText().toString();
String date02 = strdate2.getText().toString();
try {
Date d = format.parse(date01);
Date d1 = format.parse(date02);
getDifferenceDays(d, d1);
} catch (ParseException e) {
e.printStackTrace();
}
}
});
}
private void getDifferenceDays(TextView d, String d1) {
}
public void getDifferenceDays(Date d1, Date d2) {
int daysdiff = 0;
long diff = d2.getTime() - d1.getTime();
long diffDays = diff / (24 * 60 * 60 * 1000) + 1;
daysdiff = (int) diffDays;
no_of_days.setText(Integer.toString(daysdiff));
System.out.println("day count=>" + daysdiff);
}
}
答案 0 :(得分：0)
在日期选择器功能
中使用以下代码SimpleDateFormat format = new SimpleDateFormat("dd/mm/yyyy");
try {
Date d = format.parse(date1);
Date d1 = format.parse(date2);
getDifferenceDays(d, d1);
} catch (ParseException e) {
e.printStackTrace();
}
而不是调用此方法getDifferenceDays（date，date2）;