Develop Reference

.replace(list(x), "") Doesn't Work Java

I wrote code:
List<String> Names = new ArrayList<String>();
List<Double> Prices = new ArrayList<Double>();
List<String> Dates = new ArrayList<String>();
List<String> Hours = new ArrayList<String>();
List<String> iDs = new ArrayList<String>();
SimpleAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView resultsListView = (ListView) findViewById(R.id.listMyReceipts);
SearchView m = (SearchView) findViewById(R.id.action_search);
HashMap<String, String> NamePrice = new HashMap<>();
TextView test = (TextView) findViewById(R.id.test);
Names.add("Starbucks"); Prices.add(11.99); Dates.add("01/01/2017"); Hours.add("9:33");
Names.add("Apple Store"); Prices.add(500.00); Dates.add("01/01/2017"); Hours.add("9:30");
Names.add("Esselunga"); Prices.add(135.67); Dates.add("01/01/2017"); Hours.add("11:51");
Names.add("Mediaworld"); Prices.add(19.98); Dates.add("01/01/2017"); Hours.add("12:03");
Names.add("Starbucks"); Prices.add(11.99); Dates.add("01/01/2017"); Hours.add("12:47");
for (int i = 0; i < Names.size(); i++) {
iDs.add(";+#:" + i + ":#+;");
NamePrice.put(iDs.get(i) + Names.get(i), " " + Prices.get(i).toString() + "€" + " - " + Dates.get(i) + " " + Hours.get(i));
}
List<HashMap<String, String>> listItems = new ArrayList<>();
adapter = new SimpleAdapter(this, listItems, R.layout.list_item,
new String[] {"First", "Second"},
new int[] {R.id.listitemTitle, R.id.listitemSubItem});
//Integer x = 0;
//int x = -1;
Iterator it = NamePrice.entrySet().iterator();
for (int i = 0; i < iDs.size(); i++) {
HashMap<String, String> resultMap = new HashMap<>();
Map.Entry pair = (Map.Entry) it.next();
resultMap.put("First", pair.getKey().toString().replace(iDs.get(i), ""));
resultMap.put("Second", pair.getValue().toString());
listItems.add(resultMap);
}
//test.setText(IDs.get(x - 1));
resultsListView.setAdapter(adapter);
}
This should replace all the IDs into "". It doesn't. So the output could be: ;+#:0:#+;NAME1 12.99 ;+#:1:#+;NAME2 0.99
But in the second loop, if I say
resultMap.put("First", pair.getKey().toString().replace(IDs.get(0), ""));
it replaces correctly the element 0.
The output would be: NAME1 12.99 ;+#:1:#+;NAME2 0.99

You are not getting the entries of NamePrice in the order you expect. I inserted a System.out.println() in your second for loop and got the output in this order:
;+#:3:#+;Mediaworld
;+#:0:#+;Starbucks
;+#:4:#+;Starbucks
;+#:1:#+;Apple Store
;+#:2:#+;Esselunga
So you are trying to replace ;+#:0:#+; in ;+#:3:#+;Mediaworld and so forth. That doesn’t replace anything. The reason is that NamePrice is a HashMap. A HashMap’s iterator does not return the entries in any specific order, particularly not in the order they were inserted.
You may use a LinkedHashMap instead:
LinkedHashMap<String, String> NamePrice = new LinkedHashMap<>();
Its iterator returns the entries in the order they were created. So now the replacements work.

How can we get the data from map in a spinner when we select the city and internally select the value of that filed

When we select the spinner the internally we use the id in this spinner
stringArray = new ArrayList<String>();
myList = new ArrayList<HashMap<String,String>>();
for(int i=0; i<createdtrs_array.length(); i++)
{
HashMap<String, String> map = new HashMap<String, String>();
map.put("id", createdtrs_array.getJSONObject(i).getString("id"));
map.put("name", createdtrs_array.getJSONObject(i).getString("name"));
myList.add(map);
stringArray.add(createdtrs_array.getJSONObject(i).getString("id"));
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(BusTickets.this,android.R.layout.simple_spinner_item, stringArray);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
destnation.setAdapter(adapter);

I have get JSON Response in string that i split and try to display in android spinner but it show whole string in spinner

String res = getIntent().getStringExtra("Response");
Log.d("Wallet_Management Response", "getIntent" +res);
//Subscriber_Name.setText(res);
System.out.println("subscriber name response : " + res.toString());
String [] strings = new String [] {res };
List<String> stringList = new ArrayList<String>(Arrays.asList(strings));
//System.out.println("LISTTTTTTTTT : " + stringList);
for (String s :stringList){
String[] str = s.split("\\[");
for(String item : str){
//System.out.println("Checking"+item);
String [] str1 = item.split("\\]");
for (String item1 :str1)
System.out.println("Whole String"+item1);
for(int i =0;i<=str1.length;i++){
System.out.println("OUPUT" +str1[0]);
//System.out.println("OUPUT" +str1[1]);
//System.out.println("OUPUT" +str1[2]);
}
}
}
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, stringList);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
dataAdapter.notifyDataSetChanged();
spinnerEmp.setAdapter(dataAdapter);
Output is :
08-28 02:05:04.117: D/Wallet_Management Response(1501): getIntent["MaheshKhatmode","Pranav","RameshSippy"]
08-28 02:05:04.117: I/System.out(1501): subscriber name response : ["MaheshKhatmode","Pranav","RameshSippy"]
After Splitting your result as follows:
08-28 02:05:04.137: I/System.out(1501): Whole String"MaheshKhatmode","Pranav","RameshSippy"

This should work:
List<String> myStringList = new ArrayList<String>();
try {
JSONArray array = new JSONArray(res.toString());
for (int i = 0; i < array.length(); i++) {
myStringList.add(array.getString(i));
}
} catch (JSONException e) {
e.printStackTrace();
}
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, myStringList);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
dataAdapter.notifyDataSetChanged();
spinnerEmp.setAdapter(dataAdapter);

can u try like this:
Android convert String to String[]
JSONArray temp = new JSONArray(res);
String[] str1= temp.join(",").split(",");
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
dataAdapter.notifyDataSetChanged();
spinnerEmp.setAdapter(dataAdapter);

ArrayList<HashMap<String,String>> to String[]

i have data fetched from my webservice in
ArrayList<HashMap<String,String>>
Now i want to convert each object of the above to
String[]
how do i do this?
any help would be much appreciated!

try
ArrayList<HashMap<String, String>> test = new ArrayList<HashMap<String, String>>();
HashMap<String, String> n = new HashMap<String, String>();
n.put("a", "a");
n.put("b", "b");
test.add(n);
HashMap<String, String> m = test.get(0);//it will get the first HashMap Stored in array list
String strArr[] = new String[m.size()];
int i = 0;
for (HashMap<String, String> hash : test) {
for (String current : hash.values()) {
strArr[i] = current;
i++;
}
}

The uses for an Hashmap should be an Index of HashValues for finding the values much faster. I don't know why you have Key and Values as Strings but if you only need the values you can do it like that:
ArrayList<HashMap<String, String>> test = new ArrayList<>();
String sum = "";
for (HashMap<String, String> hash : test) {
for (String current : hash.values()) {
sum = sum + current + "<#>";
}
}
String[] arr = sum.split("<#>");
It's not a nice way but the request isn't it too ;)

ArrayList<HashMap<String, String>> meterList = controller.getMeter();
HashMap<String, String> mtiti = meterList.get(0);//it will get the first HashMap Stored in array list
String[] strMeter = new String[mtiti.size()];
String meter = "";
for (HashMap<String, String> hash : meterList) {
for (String current : hash.values()) {
meter = meter + current + "<#>";
}
}
String[] arr = meter.split("<#>");

How to populate a hashmap from an array

i have two arrays (actually one, but i created two for each columns). I want to populate a hashmap with the values for a listview but all elements of the listview is the last element of the arrays:
ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();
HashMap<String, String> map = new HashMap<String, String>();
for (int i=0; i<13; i++)
{
map.put("left1", date[i]);
map.put("right1", name[i]);
mylist.add(map);
}
SimpleAdapter simpleAdapter = new SimpleAdapter(this, mylist, R.layout.row,
new String[] {"left1", "right1"}, new int[] {R.id.left, R.id.right});
lv1.setAdapter(simpleAdapter);
Any ideas?
Thanks

You're adding the same map to every slot of the array. Try this instead:
ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();
for (int i=0; i<13; i++)
{
HashMap<String, String> map = new HashMap<String, String>();
map.put("left1", date[i]);
map.put("right1", name[i]);
mylist.add(map);
}