Develop Reference

Android : Split string with { character

I have an string
String name = "\"edge_followed_by\":{\"count\":46199005},\"followed_by_viewer\":false,"
I want only this 46199005.
But { shows an error, when try to split the string
String[] separated = name.split("edge_followed_by\":{\"count\":");
Showing a suggestion , number expected and want me to replace with *.
Can anyone help me in this.

Just replace { with \{.
split is trying to use it as a part of regular expression.

Ideally, you should use JSON to parse this if you have proper structure. but if you want to get only the number you can split it using ":" and then split using "}". it should give you the exact number.

Why not to use:
String[] separated = name.split(":");
separated[2].split("}")[0];

Your string is not exact JSON object otherwise you can simply do json parsing and get the count value.
You can get count value using subtring operations like below:
String name = "\"edge_followed_by\":{\"count\":46199005},\"followed_by_viewer\":false,";
String substr = name.substring(name.indexOf("\"count\":") + 10);
String finalstr = substr.substring( 0, substr.indexOf("},"));
Log.d("Extracted_Value", finalstr); // output -> 46199005
There can be multiple ways. This is just one. Hope it will help you!

How to run dynamic query depending on selected options in android?

Suppose I have the following table in a mysql database of my app:
TABLE MANAGER
Now I want to add this checkbox option in android.
And based on the selections I would want to run query in my database.
For example if the user selected NY and NJ, I would run the following query:
SELECT * FROM MANAGER WHERE city = 'NY' OR city = 'NJ'
Again, if the user had selected NY, NJ, LA
Then I would have run the query as
SELECT * FROM MANAGER WHERE city = 'NY' OR city = 'NJ' OR city = 'LA'
How do I make my app choose that by the number of options selected?
I am pretty novice in android, so it would be really a lot of help if someone told me this, or gave me a hint on where to learn this from :)

//Simple Code Snippet Just To Show how this can be done their are many ways but this is less complex
//Just Pass the selected city array
public String makeStatement(String arg[])
{
String basic_statment="SELECT * FROM MANAGER WHERE";
StringBuilder sb=new StringBuilder();
sb.append(basic_statment);
for(int i=0;i<arg.length;i++)
{
sb.append(" city = ");
sb.append("'"+arg[i]+"' ");
if(i!=arg.length-1)
sb.append("OR");
}
return sb.toString();
}
Try This

How can i get few characters from String?

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);

Android - Get single String value using HashMap

In my application, I've preloaded Spinner with ArrayList.The ArrayList contains multiple Text String. These text Strings will serve as message template user can select from spinner. Also I want these String keyword might be replaced with variable when message is being sent. Like "Text" will be replaced with EditText content, "Phone No " replaced with Sender's no, "Date" replaced with Message Date
I have tried to search on HashMap in Android, but getting problem:
HashMap<String, String> template=new HashMap<String, String>();
template.put("Text", editText.getText().toString());
template.put("Phone No",senderPhone);
template.put("Date",receivedDate);
now I want to display it as Single string like Text, Phone No, Date. can this String be editable.

You can use
StringBuilder builder = new StringBuilder();
for (String name : template.values())
{
builder.append(name + " ");
}
String templateString = builder.toString();
This will get all the values from the HashMap using the values() and concat it into a String

To get a value from Hashmap, use:
String Text = (String)template.get("Text");
String phoneNo= (String)template.get("PhoneNo");
String date = (String)template.get("Date");
You can combine all the above 3 and display it where ever you want to
For Example,
String displayString = Text + "-" + phoneNo + " -" + date
editText.setText(displayString);
This edit text by default would be editable until and unless you make it non editable.!
EDIT: (Refer comments for purpose of Edit)
(1) Set the edit text value as the value selected by user from spinner.
editText.setText(displayString);
(2) After user selects and modifies the edittext, let the user click a confirm button.
(3) In confirm button code, add the value to your local storage (IF REQUIRED!).
(4) Refresh the spinner to include this modified value
To refresh, if you want to modify the existing list in spinner then refer Refresh spinner data
To refresh, if you want to keep the existing spinner list as such, and add the new value, then refer dynamic add data to spinner but not update the data on the spinner

need to retrieve data from the database

I have a very long string in the database that needs to be retrieved into a swipe view.
But,the problem is that the string comprises of set of "\n\n"
Whenever it is separated with this expression i need to put it in another slide,i mean i am using SWIPE view here..
if(tablecolumn==\\n\\n)
{
code to break it to parts
}
Is this how i should be doing it?
If i am wrong,how to break this string to different parts and enable it into SWIPE VIEW in to different swipe view?

You can simply break your string comprising of a special character like this :-
String str ="mynameisjhon.yournameisdash.bla";
, here you have a string concatenated with " . " (period character)
to break this string do this :-
StringTokenizer st = new StringTokenizer(str, "."); //break the string whenever "." occurs
String temp =st.nextToken(); // it will have "my name is jhon" break
String temp2 = st.nextToken();// it will have "your name is dash"
String temp3 = st.nextToken();//it will have "bla"
now your string is breaked into parts!
Anything else?

Load the whole string into your ViewAdapter and seperate it via substring
or load the string in your Activity/Fragment seperate it via substring, put the strings in an ArrayList, an initiate your ViewAdapter with the ArrayList as data source
either way use substring