按钮add1，sub1，add2，sub2，add3，sub3，add4，sub4，order; TextView qtyfrenchfries，amt_frenchfries，qtychilifries，amt_chilifries， qtypotatofries，amt_potatofries，qtygrilled，amt_grilled，total;
int count1, count2, count3, count4;
double priceval1, priceval2, priceval3, priceval4;
CheckBox frenchfries, chilicheese, sweetpotato, grilledvegetables;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.starters);
frenchfries = (CheckBox) findViewById(R.id.checkBox1);
chilicheese = (CheckBox) findViewById(R.id.checkBox2);
sweetpotato = (CheckBox) findViewById(R.id.checkBox3);
grilledvegetables = (CheckBox) findViewById(R.id.checkBox4);
count1 = 1;
priceval1 = 2;
qtyfrenchfries = (TextView) findViewById(R.id.textView1);
amt_frenchfries = (TextView) findViewById(R.id.textView2);
add1 = (Button) findViewById(R.id.button1);
add1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
count1++;
qtyfrenchfries.setText("" + count1);
priceval1 = priceval1 + 2;
amt_frenchfries.setText("$" + priceval1);
}
});
sub1 = (Button) findViewById(R.id.button2);
sub1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
count1--;
if (count1 < 1) {
count1 = 1;
}
qtyfrenchfries.setText("" + count1);
priceval1 = priceval1 - 2;
if (priceval1 <= 2) {
priceval1 = 2;
}
amt_frenchfries.setText("$" + priceval1);
}
});
count2 = 1;
priceval2 = 3;
qtychilifries = (TextView) findViewById(R.id.textView3);
amt_chilifries = (TextView) findViewById(R.id.textView4);
add2 = (Button) findViewById(R.id.button3);
add2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
count2++;
qtychilifries.setText("" + count2);
priceval2 = priceval2 + 3;
amt_chilifries.setText("$" + priceval2);
}
});
sub2 = (Button) findViewById(R.id.button4);
sub2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
count2--;
if (count2 < 1) {
count2 = 1;
}
qtychilifries.setText("" + count2);
priceval2 = priceval2 - 3;
if (priceval2 <= 3) {
priceval2 = 3;
}
amt_chilifries.setText("$" + priceval2);
}
});
count3 = 1;
priceval3 = 2;
qtypotatofries = (TextView) findViewById(R.id.textView5);
amt_potatofries = (TextView) findViewById(R.id.textView6);
add3 = (Button) findViewById(R.id.button5);
add3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
count3++;
qtypotatofries.setText("" + count3);
priceval3 = priceval3 + 2;
amt_potatofries.setText("$" + priceval3);
}
});
sub3 = (Button) findViewById(R.id.button6);
sub3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
count3--;
if (count3 < 1) {
count3 = 1;
}
qtypotatofries.setText("" + count3);
priceval3 = priceval3 - 2;
if (priceval3 <= 2) {
priceval3 = 2;
}
amt_potatofries.setText("$" + priceval3);
}
});
count4 = 1;
priceval4 = 3;
qtygrilled = (TextView) findViewById(R.id.textView7);
amt_grilled = (TextView) findViewById(R.id.textView8);
add4 = (Button) findViewById(R.id.button7);
add4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
count4++;
qtygrilled.setText("" + count4);
priceval4 = priceval4 + 3;
amt_grilled.setText("$" + priceval4);
}
});
sub4 = (Button) findViewById(R.id.button8);
sub4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
count4--;
if (count4 < 1) {
count4 = 1;
}
qtygrilled.setText("" + count4);
priceval4 = priceval4 - 3;
if (priceval4 <= 3) {
priceval4 = 3;
}
amt_grilled.setText("$" + priceval4);
}
});
order = (Button) findViewById(R.id.button9);
order.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
double totalamount = 0;
if (frenchfries.isChecked()) {
totalamount += priceval1;
}
if (chilicheese.isChecked()) {
totalamount += priceval2;
}
if (sweetpotato.isChecked()) {
totalamount += priceval3;
}
if (grilledvegetables.isChecked()) {
totalamount += priceval4;
}
total.setText("$" + totalamount);
}
});
}
这是我的第一堂课...我想将totalamount的值用于另一个类并在其他类中显示...我该怎么办？
private ImageButton ib, ib1;
private Calendar cal;
private int day;
private int month;
private int year;
private EditText et;
Button book;
private int hour;
private int min;
private EditText et1;
static final int DATE_DIALOG_ID = 0;
static final int TIME_DIALOG_ID = 1;
TextView total1;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.booktable1);
/*
* total1=(TextView) findViewById(R.id.textView2); long
* textView10=getIntent().getLongExtra("total2", 0); String
* str="Total : "+textView10; total1.setText(str);
*/
// mDateButton = (Button) findViewById(R.id.date_button);
ib = (ImageButton) findViewById(R.id.imageButton1);
ib1 = (ImageButton) findViewById(R.id.imageButton2);
cal = Calendar.getInstance();
day = cal.get(Calendar.DAY_OF_MONTH);
month = cal.get(Calendar.MONTH);
year = cal.get(Calendar.YEAR);
et = (EditText) findViewById(R.id.editText);
book = (Button) findViewById(R.id.bookbtn);
et1 = (EditText) findViewById(R.id.editText1);
hour = cal.get(Calendar.HOUR_OF_DAY);
min = cal.get(Calendar.MINUTE);
/*
* total1=(TextView) findViewById(R.id.textView2);
* total1.setText(getIntent().getExtras().getString("total2"));
*/
ib.setOnClickListener(new View.OnClickListener() {
@SuppressWarnings("deprecation")
public void onClick(View v) {
// Show the DatePickerDialog
showDialog(DATE_DIALOG_ID);
}
});
ib1.setOnClickListener(new View.OnClickListener() {
@SuppressWarnings("deprecation")
public void onClick(View v) {
// Show the DatePickerDialog
showDialog(TIME_DIALOG_ID);
}
});
book.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (et1.getText().toString().equals("")
|| et.getText().toString().equals("")) {
new AlertDialog.Builder(Booktable.this)
.setTitle("Field is Empty")
.setMessage("Either Date or Time is missing")
.setNeutralButton("Ok",
new DialogInterface.OnClickListener() {
public void onClick(
DialogInterface dialog,
int which) {
}
}).show();
} else {
/*
* Intent intent = new Intent(Intent.ACTION_SENDTO,
* Uri.fromParts( "mailto","rupesh.mishra89@gmail.com",
* null)); intent.putExtra(Intent.EXTRA_SUBJECT, "subject");
* intent.putExtra(Intent.EXTRA_TEXT, "message");
* startActivity(Intent.createChooser(intent,
* "Choose an Email client :"));
*/
Toast.makeText(getApplicationContext(), "Table is booked",
Toast.LENGTH_LONG).show();
}
;
}
});
}
@Override
@Deprecated
protected Dialog onCreateDialog(int id) {
switch (id) {
case DATE_DIALOG_ID:
return new DatePickerDialog(this, datePickerListener, year, month,
day);
case TIME_DIALOG_ID:
return new TimePickerDialog(this, timePickerListener, hour, min,
false);
}
return null;
}
private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int selectedYear,
int selectedMonth, int selectedDay) {
if ((selectedYear < year)
|| ((selectedMonth < month) && (selectedYear == year))
|| ((selectedDay < day) && (selectedYear == year) && (selectedMonth == month))) {
new AlertDialog.Builder(Booktable.this)
.setTitle("Wrong Input!")
.setMessage("Please Enter Valid Date")
.setNeutralButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
}
}).show();
} else {
et.setText(selectedDay + " / " + (selectedMonth + 1) + " / "
+ selectedYear);
}
}
};
private TimePickerDialog.OnTimeSetListener timePickerListener = new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
int hour;
String am_pm;
if (hourOfDay > 12) {
hour = hourOfDay - 12;
am_pm = "PM";
} else {
hour = hourOfDay;
am_pm = "AM";
}
et1.setText(hour + " : " + minute + " " + am_pm);
if (hourOfDay < 10) {
new AlertDialog.Builder(Booktable.this)
.setTitle("Hotel not open")
.setMessage("Hotel Timings: 10 AM to 12 PM")
.setNeutralButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
}
}).show();
et1.setText("");
} else {
et1.setText(hour + " : " + minute + " " + am_pm);
}
}
};
我想通过祝酒词显示总数......
答案 0 :(得分：1)
在你的第一个Activity中，创建一个Intent，将包含数据的包放入其中，然后用这个意图启动第二个Activity：
Intent intent = new Intent(this, YourActivity.class);
Bundle bundle = new Bundle();
bundle.putDouble("total", total);
intent.putExtras(bundle);
startActivity(intent);
在第二个活动的onCreate中，您可以从捆绑中获取数据并显示Toast。
double totat = getIntent().getExtras().getDouble("total");
Toast toast = Toast.makeText(this, "some text " + total, Toast.LENGTH_LONG);
答案 1 :(得分：0)
我会在第一个类中创建一个getter方法，比如
public double getTotalAmount()
{
return totalamount;
}
然后在第二节课中，你需要创建对第一个类的引用，然后你想要Toast的位置，你可以拥有
Toast.makeText(this, *first class*.getTotalAmount(), Toast.LENGTH_SHORT).show();
答案 2 :(得分：0)
您需要使用intent.putextra。这样的事情应该有效：
Intent intent = new Intent(Activity1.this, Activity2.class);
intent.putExtra("total", total);
startActivity(intent);
在你的activity2中尝试获得你之前的总数。
int total = getIntent().getExtras().getInt("total");
答案 3 :(得分：0)
您的课程是活动课程。
因此，将值从一个活动传递到另一个活动的最佳方法是使用Intent。 你可以这样想：
在发送类中，您将值放入Intend并开始第二个活动：
Intent i1 = new Intent(this, Your2Activity.class);
i1.putExtra("YourKey", YourValue);
startActivity(i1);
在第二个活动中，您可以检索您的值：
Intent intent = getIntent();
String result = intent.getStringExtra("YourKey");
显示结果只是：
Toast.makeText(this, "Total: "+result, Toast.LENGTH_SHORT).show();