Develop Reference

How to format font in print receipt with thernal bluetooth printer

I make a POS project. I want to print receipt. I'm using thermal printer zonerich. I had successfully to print the receipt. Now, I want to custom the font. I want to make the outlet name bigger ,have a bold style and in center.
In my code bellow, when i try to put the bold format it will bold all of the receipt not only the outlet name. Please tell me how to make style only in outlet name and how to change the font size, Sorry for bad english. Thanks for your help.
public void IntentPrint(String notaID, String namaKasir, String date, String total, String pay, String change, String method) {
db = new DatabaseHandler(MainActivity.this);
String payment="";
String sosmed = "\n"+ sessionStartUp.getUserDetails().get(sessionStartUp.KEY_SOSMED);
String namaOtlet = sessionStartUp.getUserDetails().get(sessionStartUp.KEY_OUTLET);
String header ="\nReceipt : " + db.getFakeNotaID(notaID) + "\n" +
"Nama Kasir : " + namaKasir + "\n" +
"Date : " + date+"\n"+
"Name Qty Price"+"\n";
if(!pay.equals("0"))
{
payment ="\nTotal : "+total+"\n"+"Method : "+method+"\n"+
"Payment : "+pay+"\n"+
"Change : "+change;
}
else
payment ="\nTotal : "+total+"\n"+"\nMethod : "+method+"\n";
InitPrinter();
try {
outputStream.write(header.getBytes());
outputStream.write(data(notaID).getBytes());
outputStream.write(payment.getBytes());
outputStream.write(sosmed.getBytes());
byte[] format= { 27, 33, 0 };
byte[] center = { 0x1b, 'a', 0x01 };
byte[] arrayOfByte1 = { 27, 33, 0 };
format[2] = ((byte)(0x8 | arrayOfByte1[2]));
outputStream.write(center);
outputStream.write(format);
outputStream.write(namaOtlet.getBytes(),0,namaOtlet.getBytes().length);
outputStream.close();
socket.close();
} catch (Exception ex) {
value += ex.toString() + "\n" + "Excep IntentPrint \n";
// Toast.makeText(this, value, Toast.LENGTH_LONG).show();
}
}

How to replace the word in the string by using replace in Android?

I want to replace one word in the String by using substring. But it seen didn't work.
for example: The string is 0000 , and I want to replace the first word from 0 to 1.
It should be 1000. but it doesn't.
The code is like the following
String WorkStatus = "0000";
if(WorkStatus.substring(0, 1).matches("0"))
{
WorkStatus.substring(0, 1).replace("0", "1");
Log.d(TAG, "WorkStatus.substring(0, 1) = " + WorkStatus.substring(0, 1) + "\n");
Log.d(TAG, "WorkStatus = " + WorkStatus + "\n");
}
It didn't work , the string always show 0000. And what I want is "1000"
Do I missing something ?

use this
String WorkStatus = "0000";
//You use matches, while you might as well use equals
if (WorkStatus.substring(0, 1).equals("0")) {
//reassign workstatus to workstatus where the first entry is a '1' + the last three chars "000"
WorkStatus = WorkStatus.substring(0, 1).replace("0", "1") + WorkStatus.substring(1, WorkStatus.length());
Log.d(TAG, "WorkStatus.substring(0, 1) = " + WorkStatus.substring(0, 1) + "\n");
Log.d(TAG, "WorkStatus = " + WorkStatus + "\n");
}
You didnt assign the modified string to WorkStatus
Another possibility is converting the string to a char[] and replacing the index, instead of working with substrings.
String WorkStatus = "0000";
char[] chars = WorkStatus.toCharArray();
if (chars[0] == '0') {
chars[0] = '1';
WorkStatus = new String(chars);
}
If you want other chars to become 1 instead of zero, alter the chars[0] into chars[index], where index is the index you want to change from 0 to 1
Or, even easier, use a StringBuilder:
int yourIndex = 2; //your index which you want to check for 0 and change to 1
StringBuilder sb = new StringBuilder("0000");
if (sb.charAt(yourIndex) == '0')
sb.setCharAt(yourIndex, '1');
WorkStatus = sb.toString();

method replace has a return value of the string after replaced
you shuold resign the result to the String
WorkStatus=WorkStatus.substring(0, 1).replace("0", "1")+ WorkStatus.substring(1, WorkStatus.length();

if you asign it to a new variable like the below code, you can get what you needed.
String newWorkStatus=WorkStatus.substring(0, 1).replace("0", "1")+WorkStatus.substring(1);
Log.d("LOG", "WorkStatus.substring(0, 1) = " + WorkStatus.substring(0, 1) + "\n");
Log.d("LOG", "WorkStatus = " + WorkStatus + "\n");
Log.d("LOG", "New WorkStatus = " + newWorkStatus + "\n");

WorkStatus.substring(0, 1).replace("0", "1"); returns 1, you should use StringBuilder instead of String.
My solution:
StringBuilder WorkStatus = new StringBuilder("0000");
int pos = WorkStatus.indexOf("0", 0);
if (pos != -1) {
WorkStatus.replace(pos, pos + 1, "1");
}
System.out.print(WorkStatus);

How to format how values are saved to a text file?

I am currently saving values to a text file in my application. The values are read from an EEG headset every second and are then stored within the text file.
The values are read using a handler e.g.:
final Handler handler = new Handler() {
#Override
public void handleMessage(Message msg) {
// msg.what determines the type of each message
switch (msg.what) {
case TGDevice.MSG_EEG_POWER:
eegPower = (TGEegPower) msg.obj;
//trace code
Log.d("LSD", "highAlpha: " + eegPower.highAlpha);
Log.d("LSD", "lowAlpha: " + eegPower.lowAlpha);
Log.d("LSD", "highBeta: " + eegPower.highBeta);
Log.d("LSD", "lowBeta: " + eegPower.lowBeta);
Log.d("LSD", "lowGamma: " + eegPower.lowGamma);
Log.d("LSD", "midGamma: " + eegPower.midGamma);
Log.d("LSD", "delta: " + eegPower.delta);
Log.d("LSD", "theta: " + eegPower.theta);
//adding all the EEGpowers to an arraylist to help add them to file
ArrayList<String> EEGPowers= new ArrayList<String>();
EEGPowers.add("highAlpha: " + eegPower.highAlpha);
EEGPowers.add("lowAlpha: " + eegPower.lowAlpha);
EEGPowers.add("highBeta: " + eegPower.highBeta);
EEGPowers.add("lowBeta: " + eegPower.lowBeta);
EEGPowers.add("lowGamma: " + eegPower.lowGamma);
EEGPowers.add("midGamma: " + eegPower.midGamma);
EEGPowers.add("delta: " + eegPower.delta);
EEGPowers.add("theta: " + eegPower.theta);
for(String s: EEGPowers){
writeToFileEEGPower(s);
}
//rest of handler...
The following method is the method used to save the values to file:
public void writeToFileEEGPower(String data){
//creating time for the file
Time t= new Time();
int timeFileSecond= t.second;
int timeFileDate= t.yearDay;
int timeFileYear= t.year;
//creating file name
String fileName= "MathsGame" + timeFileSecond + timeFileDate + timeFileYear + android.os.Build.SERIAL;
//creating the file where the contents will be written to
File file= new File(dir, fileName + ".txt");
FileOutputStream os;
try{
boolean append= true;
os= new FileOutputStream(file, append);
String writeMe =data + "\n";
os.write(writeMe.getBytes());
os.close();
} catch(FileNotFoundException e){
e.printStackTrace();
}catch(IOException e){
e.printStackTrace();
}
}
The method and handler work as is, however my issue is that the values are not formatted as I would like when they are saved and are very messy as you can see:
E.g. of current text file:
I would like my text file to be formatted like this:
How can I implement this formatting in my code?
EDIT (Attempt at formatting):
//Declared globally outside handler
final int maxWordLength = 15;
String spaces[] = new String[maxWordLength];
//Within handler:
//setting up the array of maxlength etc
spaces[0] = "";
for(int i=1; i<maxWordLength ;i++){
spaces[i] = spaces[i-1]+" ";
}
int seconds=0;
//CREATING THE HEADER IN THE TEXT FILE
writeToFileEEGPower(order("Seconds")+order("highAlpha")+order("lowAlpha")+order("highBeta")+order("LowBeta")+
order("lowGamma")+order("midGamma")+order("Delta")+order("Theta")+ "\n");
//creating the string to be written to file
String line = order(seconds+"")+order(eegPower.highAlpha+"")+order(eegPower.lowAlpha+"")+order(eegPower.highBeta+"")+
order(eegPower.lowBeta+"")+order(eegPower.midGamma+"")+order(eegPower.delta+"")+order(eegPower.theta+"")+ "\n";
//write the string to file
writeToFileEEGPower(line);
Current sample output in text file:

You can define your max 'word' length, and complete every 'word' with empty spaces.
for example:
STEP 1
Define maxWordLength. this value describe the width of each column. Should this value will be slightly larger than the longest word (In this example length of 'highAlpha:'=10, choose number>10).
final int maxWordLength = 15;
STEP 2
Create array of empty spaces.
String spaces[] = {""," "," "," "," ", /*....*/ " "};// Complete the missing words up to the last word with 15 spaces.
Or create it dynamically:
String spaces[] = new String[maxWordLength];
spaces[0] = "";
for(int i=1; i<maxWordLength ;i++){
spaces[i] = spaces[i-1]+" ";
}
STEP 3
Define the 'Seconds' var, create the order function at your class and write the header row to the file:
int seconds=0;
//table header row
writeToFileEEGPower(order("Seconds")+order("highAlpha")+order("lowAlpha")+order("highBeta")/+.../);
private String order(String value){
return (value + spaces[maxWordLength-value.length()]);
}
STEP 4
For each handleMessage create a line and save it to the file:
String line = order(seconds+"")+order(eegPower.highAlpha+"")+order(eegPower.lowAlpha+"")+order(eegPower.highBeta+"")//+...;
writeToFileEEGPower(line);

how to automatically make a text highlighted in android

in my android application the user can send feedback
public void c_send_send(View v) {
Uri uri = Uri.parse("mailto:xx#xx.net");
Intent send = new Intent(Intent.ACTION_SENDTO, uri);
send.putExtra(Intent.EXTRA_SUBJECT, "feedback");
send.putExtra(
Intent.EXTRA_TEXT,
DeviceInformation(getResources().getString(R.string.app_name),
getResources().getString(R.string.app_version)));
startActivity(Intent.createChooser(send, "feedback"));
}
public static String DeviceInformation(String app_name, String app_version) {
String EnterTextHere = "[Enter Text Here]";
Spannable spanText = Spannable.Factory.getInstance().newSpannable(EnterTextHere);
spanText.setSpan(new BackgroundColorSpan(0xFFFFFF00), 1, 17, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
String info = "\n" + spanText + "\n\n\n\nDevice Model: "
+ android.os.Build.MANUFACTURER
+ " " + android.os.Build.MODEL + "\nAndroid Version: "
+ Build.VERSION.RELEASE + "\nApplication Version: "
+ app_version;
return info;
}
the question how can i make
[Enter Your Text Here]
highlighted as shown in the picture posted in the link below
Example

Spannable strings are a very good way to use different styling in a single string. try exploring its different functions.

You can make it highlighted by the Toast option in android
Toast.makeText(getApplicationContext(), (String)data.result, Toast.LENGTH_LONG).show();

java delimeter replacement for new line

Here is the scenario one input
String in = "<ENTER>title=Java-Samples<ENTER>" +
"<ENTER>author=Emiley J<ENTER>" +
"<ENTER>publisher=java-samples.com<ENTER>" +
"<ENTER>copyright=2007<ENTER>" +
"<ENTER>cool beans<ENTER>";
processs
in=in.substring(in.indexOf("<ENTER>")+7,in.lastIndexOf("<ENTER>"));
String[] mSplitted= in.replaceAll("<ENTER><ENTER>", "<ENTER>").split("<ENTER>");
String mFinal="";
for(int i=0;i<mSplitted.length;i++)
{
System.out.println("values: "+mSplitted[i]);
mFinal= mFinal+ mSplitted[i];
}
System.out.println(mFinal);
output is
title=Java-Samplesauthor=Emiley Jpublisher=java-samples.comcopyright=2007cool beans
Senario 2
input
String in = "What is the output of: <ENTER><ENTER>echo 6 % 4;";
processes
in=in.substring(in.indexOf("<ENTER>")+7,in.lastIndexOf("<ENTER>"));
String[] mSplitted= in.replaceAll("<ENTER><ENTER>", "<ENTER>").split("<ENTER>");
String mFinal="";
for(int i=0;i<mSplitted.length;i++)
{
// System.out.println("values: "+mSplitted[i]);
mFinal= mFinal+ mSplitted[i];
}
System.out.println(mFinal);
Output
nothing
I want the output to add a new line when is used

Still not 100% on your question but how about this:
String mFinal = in.replaceAll("<ENTER><ENTER>", "\n").replaceAll("<ENTER>", "");