I'm trying to concat multiple results which is generating separately. Already tried to put the results in a TextView but it only shows thw last result.
Log.wtf("Concat ", msg2);
E/Concat: A4 Paper 6 -> $ 57.0
E/Concat: JetPen 8 -> $ 105.0
E/Concat: Shopper 9 -> $ 110.25
E/Concat: Pilot 10 -> $ 70.0
E/Concat: Valentine Card 2 -> $ 60.0
List<Basket> items = ((BasketAdapter)binding.get().basketRecycler.getAdapter()).getItems();
for(Basket basket : items){
//Log.wtf("Name ", basket.product.name);
//Log.wtf("Price ", basket.basketPrice + "");
//Log.wtf("Count ", basket.count + "");
float subTotal = basket.basketPrice * basket.count;
String message = basket.product.name +" "+"->"+" "+" $ "+subTotal;
Log.wtf("Concat ", message);
Try this , your code is not working because you are creating new string every time inside of for loop. What I have done is created a variable message outside for loop and concatinated it inside loop using += operator
List<Basket> items =
((BasketAdapter)binding.get().basketRecycler.getAdapter()).getItems();
String message = "";
for(Basket basket : items){
//Log.wtf("Name ", basket.product.name);
//Log.wtf("Price ", basket.basketPrice + "");
//Log.wtf("Count ", basket.count + "");
float subTotal = basket.basketPrice * basket.count;
message += basket.product.name +" "+"->"+" "+" $ "+subTotal;
Log.wtf("Concat ", message);
You are declaring String message in for loop. Thats why each time new object is created. Declare String message outside of for loop.
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UPDATE SOLVED :
i don't know what happened, my Array is work normally when i add this code :
EditText editText= new EditText(this);
editText.setId(456 + i);
mSurveyView.addView(editText);
I don't know how to title this question. Because i am confused, but i will explain my problem with code
So, I have ArrayList data, ex : 1 2 3 4 5 , but when i try to show/debug just get 3 data like 1 3 5. I think, the ArrayList skip my data?
This is my code :
if (dataSurvey.listFieldSurvey.size() > 0) {
for (int i = 0; i < dataSurvey.listFieldSurvey.size(); i++) {
FieldSurvey xx = dataSurvey.listFieldSurvey.get(i);
String type = xx.metaSurvey.name;
Log.d("Tag", "type text " + dataSurvey.listFieldSurvey.size());
labelCaption = new TextView(getActivity());
labelCaption.setId(456 + i);
labelCaption.setText(xx.name + ". " + xx.caption);
labelCaption.setTypeface(Typeface.DEFAULT_BOLD);
mSurveyView.addView(labelCaption);
}
}
I tried Log.d "Tag", i have data size 5, but just show 3 data when i tried to show
I have 4 textviews which take their values from dropdown list (spinner) selected at previous screen.
There can be either 2 or 4 numbers/letters as result of this selection.
The first position will always be a number and the second position will always be a letter. The third position can be a number or blank and the fourth position can be a letter or blank.
If position 3 and position 4 are blank then I need to make them equal to positions 1 & 2 respectively.
String myGrade = intent.getStringExtra("parameter_name_grade");
// above takes value of 'myGrade' from spinner selection at previous screen
String mDisplayGradeNumberEff = (" " + myGrade.charAt(0));
TextView displayGradeNumberEff = (TextView) findViewById(R.id.gradeNumberEffTV);
displayGradeNumberEff.setText(mDisplayGradeNumberEff);
String mDisplayGradeLetterEff = (" " + myGrade.charAt(1));
TextView displayGradeLetterEff = (TextView) findViewById(R.id.gradeLetterEffTV);
displayGradeLetterEff.setText(mDisplayGradeLetterEff);
// above works correctly
// from here down only works when a character is present in both positions
// if positions 3(2) and 4(3) are empty app stops running.
String mDisplayGradeNumberDia = (" " + myGrade.charAt(2));
if (mDisplayGradeNumberDia.isEmpty()) {
mDisplayGradeNumberDia = mDisplayGradeNumberEff;
}
TextView displayGradeNumberDia = (TextView) findViewById(R.id.gradeNumberDiaTV);
displayGradeNumberDia.setText(mDisplayGradeNumberDia);
String mDisplayGradeLetterDia = (" " + myGrade.charAt(3));
if (mDisplayGradeLetterDia.isEmpty()) {
mDisplayGradeLetterDia = mDisplayGradeLetterEff;
}
TextView displayGradeLetterDia = (TextView) findViewById(R.id.gradeLetterDiaTV);
displayGradeLetterDia.setText(mDisplayGradeLetterDia);
}
I Guess you have a array out of bounds exception, please provide Logcat....
Check if "myGrade" has 3/4 Characters, if it does not you can't read them with charAt(3)...
You can check the length of the String with "myGrade.length()"
When I asked this question I was fairly new to the site and didn't understand that I should post back the solution for future reference. Solution below worked so thanks to rocket for your help and sorry for the delay!
int myGradeLength = mGrade.length();
if (myGradeLength != 4) {
mDisplayGradeNumberEff = ("" + mGrade.charAt(0));
mDisplayGradeLetterEff = ("" + mGrade.charAt(1));
mDisplayGradeNumberDia = ("" + mGrade.charAt(0));
mDisplayGradeLetterDia = ("" + mGrade.charAt(1));
} else {
mDisplayGradeNumberEff = ("" + mGrade.charAt(0));
mDisplayGradeLetterEff = ("" + mGrade.charAt(1));
mDisplayGradeNumberDia = ("" + mGrade.charAt(2));
mDisplayGradeLetterDia = ("" + mGrade.charAt(3));
}
I am having a string(number) with special characters. I want to search for a sub-string(comprising of digits only) & also I want to detect the starting index & ending index of matching sub-string in the string.
For example: main string: (+91)-1231212 1231
Sub-string to search: 1212
Currently I am using the following code to do this but in place of 1212,it searched for 12312. For other cases, it works fine.
String sss0 = "1212";
String sss1 = "(+91)-1231212 1231";
sss0 = sss0.replaceAll("[^\\d]","");
System.out.println("*************************"+sss0);
String ptn = "" + sss0.charAt(0);
for(int jj=0; jj<sss0.length()-1; jj++){
ptn += "[^" + sss0.charAt(jj) + sss0.charAt(jj+1) + "]*?" + sss0.charAt(jj+1);
}
System.out.println("ptn: " + ptn);
Pattern p300 = Pattern.compile(ptn);
Matcher m300 = p300.matcher(sss1);
if(m300.find()){
System.out.println("start, stop: " + m300.start() + "," + (m300.end()-1 ));
System.out.println("substring: " + sss1.substring(m300.start(), m300.end()));
}
Please help me. Thanks in advance.
Try this :
int start = sss1.indexOf(sss0);
if(start != -1) {
System.out.println("Start : " + start);
System.out.println("End : " + start.length()); //maybe add +1 here depending on what you mean by end index.
}
You can also put this in a loop to find all occurences of the substring.
pseudocode:
pattern = ""
foreach char c in sss0:
pattern += c + "[^0-9]*"
found_substring = match(pattern, sss1)
the idea being to intersperse the literal characters you're looking for with the pattern that you're willing to skip over.
I'm storing this data in a .dat file:
data = date + ": " + y + "L/100KM "+ " " + value1 + "dt "+ value2 + "KM\n";
Every line has different values of date,y,value1 and value2.
I want to retrieve variable value1 of every line. How to browse the file and extract this variable of all lines. I'm stucking in this problem in my project. Thanks for helping.
EDIT: Example:
I have this 3 datas stored in the file:
11/09: 5.8L/100KM 20dt 250KM
12/09: 6.4L/100KM 60dt 600KM
13/09: 7.5L/100KM 50dt 543KM
In that case, i want to retrieve 20dt, 60dt and 50dt.
Here's one suggestion using regular expressions:
String line = "12/09: 6.4L/100KM 60dt 600KM";
Pattern p = Pattern.compile("(\\d+)dt");
Matcher m = p.matcher(line);
if (m.find())
System.out.println(m.group(1)); // prints 60
If you have several lines to iterate over, you'd use for instance a new BufferedReader(new FileReader("youfile.dat")) and do something like
String line;
while ((line = br.nextLine()) != null) {
Matcher m = p.matcher(line);
if (m.find())
process(m.group(1));
}
You could also just use line.split(" ") and select the 3:rd element:
String line = "12/09: 6.4L/100KM 60dt 600KM";
String dtVal = line.split(" ")[2];
// Optional: Remove the "dt" part.
dtVal = dtVal.substring(0, dtVal.length() - 2);
System.out.println(dtVal);
I am trying to pass two variables from one screen to another. From the previous screeen you click a button, 1 or 2 and it passes that value on. It also passes the value 2 as the correct value. I know they are both working as I output each variable on the next screen. Here is the code. It always outputs wrong though.
Intent i = getIntent();
Bundle b = i.getExtras();
String newText = b.getString("PICKED");
String correct = b.getString("CORRECT");
TextView titles = (TextView)findViewById(R.id.TextView01);
if(newText == correct){
titles.setText("Correct" + newText + " " + correct + "");
}
else{
titles.setText("Wrong" + newText + " " + correct + "");
}
because you are not comparing the string. you are comparing if both are pointing to same object.
to compare string use
if(nexText.equals(correct))
if(newText == correct)
This will always be false. To compare the contents of two Strings character by character, use the .equals method:
if( newText.equals(correct) )
Using == on objects in Java means you are comparing the values of the memory address stored in these pointers/references. Since they are different String objects, they will never have the same address.
You don't compare Strings this way, rewrite code this way to get things done:
Intent i = getIntent();
Bundle b = i.getExtras();
String newText = b.getString("PICKED");
String correct = b.getString("CORRECT");
TextView titles = (TextView)findViewById(R.id.TextView01);
if(newText.equals(correct)){
titles.setText("Correct" + newText + " " + correct + "");
}
else{
titles.setText("Wrong" + newText + " " + correct + "");
}