Develop Reference

Android programming to convert a string array to double array

I need to convert a string array to double array in android. But my app is not getting executed on my device. It shows unfortunately stopped.Following is my code:
String dataa="0.121 0.547 0.875 0.245";
String delimiter = " ";
String spectrainstring[] = dataa.split(delimiter);
int size = spectrainstring.length;
double[] spectraldata={0.0};
for(int i=0;i<size;i++)
{
spectraldata[i]=Double.parseDouble(spectrainstring[i].toString());
}

String dataa = "0.121 0.547 0.875 0.245";
String delimiter = " ";
String spectrainstring[] = dataa.split(delimiter);
int size = spectrainstring.length;
double[] spectraldata = new double[size];
for (int i = 0; i < size; i++) {
spectraldata[i] = Double.parseDouble(spectrainstring[i].toString());
System.out.println(spectraldata[i]);
}

Not getting values from json in android

I am trying to parse my json with:
for(int i = 0; i < json.getJSONArray("JSON").length(); i++) {
String taste = json.getJSONArray("JSON").getJSONObject(i).getString("taste");
String rate = json.getJSONArray("JSON").getJSONObject(i).getString("rate");
int foo = Integer.parseInt(rate);
count = count + foo;
//create object
BeerTastes tempTaste = new BeerTastes(taste, rate);
//add to arraylist
tasteList.add(tempTaste);
Log.d("taste",tempTaste.taste);
Log.d("number",tempTaste.percent);
}
But my logs at the end are not outputting anything at all so I assume I am not parsing my json correctly. The json I am looking at is:
[{"taste":"Bitter","rate":"13"},{"taste":"Malty","rate":"3"},{"taste":"Smooth","rate":"3"},{"taste":"Dry","rate":"1"}]
I think I may be wrong with:
json.getJSONArray("JSON")
because my array doesnt have a name but I it has to take a string...

I find no 'JSON' in your JSON String.So i think you should write like this:
JSONArray jsonArray = new JSONArray(json);
then:
for(int i = 0; i < jsonArray.length(); i++) {
String taste = jsonArray.getJSONObject(i).getString("taste");
String rate = jsonArray.getJSONObject(i).getString("rate");
int foo = Integer.parseInt(rate);
count = count + foo;
//create object
BeerTastes tempTaste = new BeerTastes(taste, rate);
//add to arraylist
tasteList.add(tempTaste);
Log.d("taste",tempTaste.taste);
Log.d("number",tempTaste.percent);
}

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);

how to get value from sharedpreferences and save it arraylist

how to get value from shared preferences and save it array list
I want to get the string from shared preferences so that i want save that string to array list
SharedPreferences keyValues = context.getSharedPreferences("name_icons_list", context.MODE_PRIVATE);
if(keyValues.getString(""+str,"").equals("true"))
{
holder.tb1.setChecked(true);
onApps.add(str);
System.out.println("Block appp+++++"+onApps);
System.out.println("******************************************");
System.out.println("data retrive from database"+ position);
System.out.println("******************************************");
}

You may use this code to save preference in arraylist and vice versa
public String[] getApplicationList() { Log.i("test","prefrence getapplist");
return mApplicationList;
}
public void saveApplicationList(String[] applicationList) { Log.i("test","prefrence saveapplist");
mApplicationList = applicationList;
String combined = "";
for (int i=0; i<mApplicationList.length; i++){
combined = combined + mApplicationList[i] + ";";
}
mPref.edit().putString(PREF_APPLICATION_LIST, combined).commit();
}

I believe this should do the trick:
String savedString = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE)
.getString("name_icons_list", "");
StringTokenizer st = new StringTokenizer(savedString, ",");
int numberOfToken = st.countTokens();
ArrayList<String> arraylist = new ArrayList<String>();
for (int i = 0; i < numberOfToken; i++) {
arraylist.add(st.nextToken());
}

Android from string to string array

hi to all i have this code have this code which reads a some text and it extracts any strings between the '[' and ']' and it should print it on the screen
String lines[] = {addressString};
for (int i = 0; i < lines.length; i++) {
int be = lines[i].indexOf('[');
int e = lines[i].indexOf(']');
String fields = lines[i].substring(be+1, e);
}
my question is that i want to change the string "fields" to an array string so when i print it
i can print it as fields[0],fields[1],....etc until the end of the text....?
any suggestions...??
Thanks a lot

Is this what you mean?
String lines[] = {addressString};
String fields[] = new String[lines.length];
for (int i = 0; i < lines.length; i++) {
int be = lines[i].indexOf('[');
int e = lines[i].indexOf(']');
fields[i] = lines[i].substring(be+1, e);
}