In my Android app I have a String[].
If I have 2 of the same Strings, like:
String a = "abc";
String b = "abc";
Can I store both Strings a and b in the same String[]?
Yes, you can add the same string text to two entries in a string array.
String[0] = "abc" and
String[1] = "abc"are perfectly fine
Related
If a send a string in the following format: 1234,1234,1234,1234; from Arduino to Android Studio (java (intelliJ)) based. with the amount of characters between every komma changing. How do i make it so that my code only reads the string from for example 0 to the , Or from the first , to the second ,?
If you are using Java, I would recommend looking into the Java.String.split() method. This method will split your string in an array of strings, depending on your delimiter. For example :
String s = "1234,1234,1234,1234";
String[] result = s.split(",");
You can split the input string based on any special character,in your case ,, as follows
String inputString = "1234,1234,1234,1234";
String[] separated = inputString.split(",");
Log.i("MainActivity",separated[0]) // prints the first string which is 1234
// to loop over all strings
for(String s : separated){
Log.i("MainActivity",s)
}
I want to retrieve few characters from string i.e., String data on the basis of first colon (:) used in string . The String data possibilities are,
String data = "smsto:....."
String data = "MECARD:....."
String data = "geo:....."
String data = "tel:....."
String data = "MATMSG:....."
I want to make a generic String lets say,
String type = "characters up to first colon"
So i do not have to create String type for every possibility and i can call intents according to the type
It looks like you want the scheme of a uri. You can use Uri.parse(data).getScheme(). This will return smsto, MECARD, geo, tel etc...
Check out the Developers site: http://developer.android.com/reference/android/net/Uri.html#getScheme()
Note: #Alessandro's method is probably more efficient. I just got that one off the top of my head.
You can use this to get characters up to first ':':
String[] parts = data.split(":");
String beforeColon = parts[0];
// do whatever with beforeColon
But I don't see what your purpose is, which would help giving you a better solution.
You should use the method indexOf - with that you can get the index of a certain char. Then you retrieve the substring starting from that index. For example:
int index = string.indexOf(':');
String substring = string.substring(index + 1);
This question already has answers here:
How do I split a string in Java?
(39 answers)
Closed 8 years ago.
I have data with repeating pattern '###'.I want to extract all strings between this pattern.
The data is like -
son###can###e###nick###54###
how can i get all data between the pattern '###'.
try this:
String patternString = "###";
Pattern pattern = Pattern.compile(patternString);
String[] split = pattern.split(text);
You can use Scanner with "###" delimiter.
Scanner in = new Scanner("son###can###e###nick###54###");
in.useDelimiter("###");
while(in.hasNext)
String x = in.next();
//Do something with x;
x will hold everything between ###. You can easily store them in an Array inside the loop or use them anyway you like.
Try this:
String str = "son###can###e###nick###54###";
String newStr = str.replaceAll("[#]+", "");
or you can separate all world via
String rem = "###";
Pattern pattern = Pattern.compile(rem);
String[] splitarr = pattern.split(text);
for(int i=0;i<aplitarr.length();i++)
{
String word=aplitarr[i].ToString();
}
Hope this may help you!
try,
String[] separated = CurrentString.split("###");
separated[0]; // this will contain "son"
separated[1]; // this will contain "can"
or
StringTokenizer tokens = new StringTokenizer(CurrentString, "###");
String first = tokens.nextToken();// this will contain "son"
String second = tokens.nextToken();// this will contain "can"
Not able to get name/value pairs from JSON object, when using the variable but able to read it when hard coding the name.
To better explain :
1) My JSON object is like this -
{.....
{ "rates":{ "name1": value1, "name2": value2 ...etc }
...}
2) I am able to read this object in my android app.
3) Now this rate object name value pairs, i am trying to read based on user input -
String s1 = '"'+name1+'"'; // here name1 i got from user input, & converted into string
4) Now when i am trying to get the value from rates object, i am getting null exception -
JSONObject rateObject = jObject.getJSONObject("rates"); //able to get
complete object
String rate1 = (String) rateObject.get(s1); // giving NULL exception
5) But if i use hard code string, it works -
String rate1 = (String) rateObject.get("name1"); // working
Any pointers why its not working while using variable.
thanks
Thanks for suggestions, i sorted out the problem. There are 2 mistakes i was doing - 1) Using the quotes as correctly pointed out by others and 2) casting the double value to string. Correcting both has resolved my problem :)
In terms of your final code snippet, you are actually doing
String rate1 = (String) rateObject.get("\"name1\""); //note the extra quotes
because you have bookended the user input string with double-quote characters. You just want the input string itself with no bookending. The quotes in the JSON notation serve to delineate each key name; the quotes are not part of the key name itself.
You need to omit the quotes when you create s1:
String s1 = name1;
Or, if name1 is not a String already:
String s1 = name1.toString();
Replace:
String s1 = '"'+name1+'"';
with:
String s1 = name1;
I am new to the android application to develop a project. There is a string.xml file in my project. My question is how to retrieve the data from the string.xml?
String string = context.getString(R.string.string_name);
or
String string = this.getString(R.string.string_name);
Take a look at String Resources for more information.
String myString = getResources().getString(R.string.stringname);
and if it is String array
String[] stringArray ;
stringArray = getResources().getStringArray(R.array.stringArrayName);