Develop Reference

Filter number from Array of string and get the index of last two greater number in android

I have a ArrayList that has value like [Value,Sum3,121,data8input,in:21::7,7.00,9.01] and I want to extract only number as the output should be like this [3,121,8,21,7,7.00,9.01] and then have to rearrange ascending and then get the index of last two number as result will be [21,121].
My tried code below,
for (int i = 0; i < arrayString.size(); i++) {
Pattern p = Pattern.compile("-?\\d+(,\\d+)*?\\.?\\d+?");
List<String> numbers = new ArrayList<String>();
Matcher m = p.matcher(arrayString.get(i).getvalue);
numbers.addAll(m);
for (int j = 0; j < numbers.size(); j++) {
Log.d("REMEMBERFILTER", allCollection.get(i).getTextValue());
}
}
}

do something like this, though it is not exactly memory efficient as I am using another list.
ArrayList<String> tempList = new ArrayList<>();
for (int i = 0; i < yourArrayList.size(); i++) {
tempList.add(yourArrayList.get(i).replaceAll("[^0-9]", ""));
}
//Arrange in ascending order
Collections.sort(tempList);
//Also try to remove those indexes which has only letters with
tempList.removeAll(Arrays.asList("", null));
for (int i = 0; i < tempList.size(); i++) {
Log.d("+++++++++", "" + tempList.get(i));
}
//You can get the last two or any element by get method of list by //list.size()-1 and list.size()-2 so on

This is a way to do it, finalArray has the 2 numbers you want:
String[] str = new String[] {"Value", "Sum3", "121", "data8input", "in:21::7", "7.00,9.01"};
StringBuilder longStringBuilder = new StringBuilder();
for (String s : str) {
longStringBuilder.append(s).append(" ");
}
String longString = longStringBuilder.toString();
String onlyNumbers = " " + longString.replaceAll("[^0-9.]", " ") + " ";
onlyNumbers = onlyNumbers.replaceAll(" \\. ", "").trim();
while (onlyNumbers.indexOf(" ") > 0) {
onlyNumbers = onlyNumbers.replaceAll(" ", " ");
}
String[] array = onlyNumbers.split(" ");
Double[] doubleArray = new Double[array.length];
for (int i = 0; i < array.length; i++) {
try {
doubleArray[i] = Double.parseDouble(array[i]);
} catch (NumberFormatException e) {
e.printStackTrace();
doubleArray[i] = 0.0;
}
}
Arrays.sort(doubleArray);
int numbersCount = doubleArray.length;
Double[] finalArray;
if (numbersCount >= 2) {
finalArray = new Double[]{doubleArray[numbersCount - 2], doubleArray[numbersCount - 1]};
} else if (numbersCount == 1) {
finalArray = new Double[]{ doubleArray[0]};
} else {
finalArray = new Double[]{};
}
for (Double number : finalArray) {
System.out.println(number);
}

Android. How to switch String = (A B, C D, E F, .....) to String (B A, D C, F E, ......)

i am a beginner.
I get String from SQLite.
WKT = cursor.getString(cursor.getColumnIndex(polygon));
WKT = WKT.replaceAll(",", ", ");
Its look like String = (1.00 2.00, 3.00 4.00, 5.00 6.00, .....).
How to switch it to String (2.00 1.00, 4.00 3.00, 6.00 5.00, ......).
Thanks.

try this
private static void testMethod() {
String result = "(A B, C D, E F)";
String resultTmp = result;
resultTmp = resultTmp.replace("(", "");
resultTmp = resultTmp.replace(")", "");
String[] aryResult = resultTmp.split(",");
String[] finalResult = reverseString(aryResult);
StringBuilder strBuilder = new StringBuilder();
for (int i = 0; i < finalResult.length; i++) {
String dfgf = strBuilder.toString().equals("") ? "" : ",";
strBuilder.append(dfgf);
strBuilder.append(finalResult[i]);
}
String newString = strBuilder.toString();
System.out.println("RESULT : " + newString);
}
public static String[] reverseString(String[] words)
{
String[] t = new String[words.length];
for (int i = 0; i < words.length; i++)
{
t[i] = "";
for (int j = words[i].length() - 1; j >= 0; j--)
t[i] += words[i].charAt(j);
}
return t;
}

Follow below steps
1)Split string with ","
2)User Reverse() function to reverse the string(AB->BA)
3)Store the result in to an array.
Repeat the step until you split the last entry from sql lite.

Try this logic,its working in c and c++.
int Groups = 1; // Count 1 for the first group of letters
for ( int Loop1 = 0; Loop1 < strlen(String); Loop1++)
if (String[Loop1] == ' ') // Any extra groups are delimited by space
Groups += 1;
int* GroupPositions = new int[Groups]; // Stores the positions
for ( int Loop2 = 0, Position = 0; Loop2 < strlen(String); Loop2++)
{
if (String[Loop2] != ' ' && (String[Loop2-1] == ' ' || Loop2-1 < 0))
{
GroupPositions[Position] = Loop2; // Store position of the first letter
Position += 1; // Increment the next position of interest
}
}

try this..
private static void testTwo() {
String result = "(1.00 2.00, 3.00 4.00, 5.00 6.00)";
String resultTmp = result;
resultTmp = resultTmp.replace("(", "");
resultTmp = resultTmp.replace(")", "");
String[] aryResult = resultTmp.split(",");
for (int i = 0; i < aryResult.length; i++) {
String str = aryResult[i].trim();
String[] sdf = str.split(" ");
aryResult[i] = reverseArray(sdf);
}
String strResult = Arrays.toString(aryResult).replace("[", "(").replace("]", ")");
System.out.println("RESULT : " + strResult);
}
public static String reverseArray(String[] words)
{
for(int i = 0; i < words.length / 2; i++)
{
String temp = words[i];
words[i] = words[words.length - i - 1];
words[words.length - i - 1] = temp;
}
return ((Arrays.toString(words)).replace("[", "")).replace("]", "").replace(",", "");
}

#. If you want to swap sub-string, just use below method:
public String swapString(String str) {
str = str.replace("(", "");
str = str.replace(")", "");
String[] array = str.split(", ");
StringBuilder result = new StringBuilder();
result.append("(");
for (int i = 0; i < array.length; i++) {
String[] temp = String.valueOf(array[i]).split(" ");
result.append(temp[1]);
result.append(" ");
result.append(temp[0]);
if (i != array.length -1)
result.append(", ");
}
result.append(")");
return result.toString();
}
USE:
String yourString = "(1.00 2.00, 3.00 4.00, 5.00 6.00)";
Log.d("ARRAY", "Before Swap: " + yourString);
yourString = swapString(yourString);
Log.d("ARRAY", "After Swap: " + yourString);
OUTPUT:
D/ARRAY: Before Swap: (1.00 2.00, 3.00 4.00, 5.00 6.00)
D/ARRAY: After Swap: (2.00 1.00, 4.00 3.00, 6.00 5.00)
#. If you want to swap char, use below method:
public String swapChar(String str) {
// Convert string to char array
char[] array = str.toCharArray();
for (int i = 1; i < array.length - 1; i+=5) {
// Swap char
char temp = array[i];
array[i] = array[i+2];
array[i+2] = temp;
}
return String.valueOf(array);
}
USE:
String yourString = "(A B, C D, E F, G H, I J)";
Log.d("ARRAY", "Before Swap: " + yourString);
yourString = swapChar(yourString);
Log.d("ARRAY", "After Swap: " + yourString);
OUTPUT:
D/ARRAY: Before Swap: (A B, C D, E F, G H, I J)
D/ARRAY: After Swap: (B A, D C, F E, H G, J I)
Hope this will help~

how to check condition for json array elements

I am developing an app in which i am calling a service, in which data is coming as an array format.
As shown below:
[
{
"Image":null,
"FirstName":null,
"Active":false,
"HallTicketNumber":0,
"ReportingTime":null,
"EventDetails":null,
"CompanyName":null,
"Designation_Role":null,
"EventDate":null,
"StateName":null,
"CityName":null,
"FullAddress":null,
"HallTicket_Status":"HETSTOP"
}
]
In that i need to check the condition for HET_STATUS,if that StATUS is HET STOP then it should print that het stop. But when i am trying to check the condition it is showing nothing:
Below is my code:
String StringData = "" + data;
try {
JSONArray rootArray = new JSONArray(StringData);
int len = rootArray.length();
for (int i = 0; i < len; ++i) {
JSONObject json = rootArray.optJSONObject(i);
String CompanyName = json.optString("CompanyName ");
String Position = json.optString("Designation_Role");
String EventDate = json.optString("EventDate");
String StateName = json.optString("StateName ");
String CityName = json.optString("CityName");
String Address = json.getString("FullAddress");
String ReportingTime = json.getString("ReportingTime");
String HallTicket_Status = json.getString("HallTicket_Status");
if (HallTicket_Status == "HETSTOP") {
Toast toast = Toast.makeText(UpcomingEventsDetails.this, "HET STOP", Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();

Try this way,
if(HallTicket_Status.equalsIgnoreCase("HETSTOP")){
Toast toast = Toast.makeText(UpcomingEventsDetails.this, "HET STOP", Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}else{
//do something
}
boolean equals(String str): Case sensitive comparison
boolean equalsIgnoreCase(String str): Case in-sensitive comparison
== will still test object equality. It is easy to be fooled, however:
Integer a = 10;
Integer b = 10;
System.out.println(a == b); //prints true
Integer c = new Integer(10);
Integer d = new Integer(10);
System.out.println(c == d); //prints false. however:
Integer a = 10;
Integer b = 10;
System.out.println(a == b); //prints true
Integer c = new Integer(10);
Integer d = new Integer(10);
System.out.println(c == d); //prints false

Don't use == condition for strings. Instead of use str.equals("HEYSTOP") . This will return boolean. If you check string is null then you should use == or != conditions.

Check if next char in a string is a space

I would like to check if the current char is a blank space as i dont want to change that. So i would like to change all the letters like i do now, but keep the spaces.
e.g. "that man" with C = 2 should become "vjcv ocp".
thanks in advance :)
String initialString = yourString.getText().toString();
char[] chars = initialString.toCharArray();
for (int i = 1; i <= chars.length; i++) {
C = Integer.valueOf(ceasarNr);
chars[i-1] = characters.get((characters.indexOf(chars[i-1]) + C)%29);
}
String resultString = new String(chars);
krypteredeTekst.setText(resultString);
}

Just skip the iteration if the character is a space:
String initialString = yourString.getText().toString();
char[] chars = initialString.toCharArray();
for (int i = 1; i <= chars.length; i++) {
//Skip if it is space.
if chars[i-1] == ' ';
continue;
C = Integer.valueOf(ceasarNr);
chars[i-1] = characters.get((characters.indexOf(chars[i-1]) + C)%29);
}
String resultString = new String(chars);
krypteredeTekst.setText(resultString);
}

There is method for checking if char is blank space ->
String initialString = yourString.getText().toString();
char[] chars = initialString.toCharArray();
for (int i = 1; i <= chars.length; i++) {
C = Integer.valueOf(ceasarNr);
if(!Character.isWhitespace(chars.charAt(i-1)) {
chars[i-1] = characters.get((characters.indexOf(chars[i-1]) + C)%29);
}
}
String resultString = new String(chars);
krypteredeTekst.setText(resultString);

regular-expressions android

i have string like these for example
309\306\308\337_338
309\306\337_338
310
311\315_316\336_337
311\315_316\336_337
311\335_336
these strings means list of page number , for example string "309\306\308\337_339" means
pages 309,306,308,337,338,339
i want to pass one of these string to function which return it as string like this
309,306,308,337,338,339
this function do that but in c# , i want to impalement in android
private static string Get_PageNumbers(string str)
{
ArrayList arrAll = new ArrayList();
MatchCollection match;
string[] excar;
string strid, firstNumber, lastlNumber;
int fn, ln;
ArrayList arrID = new ArrayList();
//***In Case The Range Number Between "_"
if (str.Contains("_"))
{
// match_reg = new Regex("(w?[\\d]+)*(_[\\d]+)");
Regex matchReg = new Regex("(w?[\\69]+_[\\d]+)*(q?[\\d]+//)*(a?[\\d]+_[\\d]+)*(y?[\\d]+)*");
match = matchReg.Matches(str);
int count = match.Count;
excar = new string[0];
for (int i = 0; i < count; i++)
{
Array.Resize(ref excar, count);
excar[i] = match[i].Groups[0].Value;
if (excar[i] != string.Empty)
arrID.Add(excar[i]);
}
//******IF Array Contains Range Of Number Like"102_110"
if (str.Contains("_"))
{
for (int i = 0; i < arrID.Count; i++)
{
strid = arrID[i].ToString();
if (arrID[i].ToString().Contains("_"))
{
int idy = strid.LastIndexOf("_");
firstNumber = strid.Substring(0, idy);
if (idy != -1)
{
lastlNumber = strid.Substring(idy + 1);
fn = int.Parse(firstNumber);
arrAll.Add(fn);
ln = int.Parse(lastlNumber);
for (int c = fn; c < ln; c++)
{
fn++;
arrAll.Add(fn);
}
}
}
else
{
arrAll.Add(arrID[i].ToString());
}
}
//******If Array Contain More Than One Number
if (arrAll.Count > 0)
{
str = "";
for (int i = 0; i < arrAll.Count; i++)
{
if (str != string.Empty)
str = str + "," + arrAll[i];
else
str = arrAll[i].ToString();
}
}
}
}
//***If string Contains between "/" only without "_"
else if (str.Contains("/") && !str.Contains("_"))
{
str = str.Replace("/", ",");
}
else if (str.Contains("\\"))
{
str = str.Replace("\\", ",");
}
return str;
}

I think this is easier to do with split function:
public static String Get_PageNumbers(String str) {// Assume str = "309\\306\\308\\337_338"
String result = "";
String[] pages = str.split("\\\\"); // now we have pages = {"309","306","308","337_338"}
for (int i = 0; i < pages.length; i++) {
String page = pages[i];
int index = page.indexOf('_');
if (index != -1) { // special case i.e. "337_338", index = 3
int start = Integer.parseInt(page.substring(0, index)); // start = 337
int end = Integer.parseInt(page.substring(index + 1)); // end = 338
for (int j = start; j <= end; j++) {
result += String.valueOf(j);
if (j != end) { // don't add ',' after last one
result += ",";
}
}
} else { // regular case i.e. "309","306","308"
result += page;
}
if (i != (pages.length-1)) { // don't add ',' after last one
result += ",";
}
}
return result; // result = "309,306,308,337,338"
}
For example this function when called as follows:
String result1 = Get_PageNumbers("309\\306\\308\\337_338");
String result2 = Get_PageNumbers("311\\315_316\\336_337");
String result3 = Get_PageNumbers("310");
Returns:
309,306,308,337,338
311,315,316,336,337
310

if i can suggest different implementation....
first, split string with "\" str.split("\\");, here you receive an array string with single number or a pattern like "num_num"
for all string founded, if string NOT contains "" char, put string in another array (othArr named), than, you split again with "" str.split("_");, now you have a 2 position array
convert that 2 strings in integer
now create a loot to min val form max val or two strings converted (and put it into othArr)
tranform othArr in a string separated with ","