I am trying to convert String to array then to integer using android studio app

Question

I am trying to convert a string to an array, then to an integer by summing values based on the letters in the array. The problem is every time I make the Android app, the app cannot read the last value of array. The same code is working fine in Eclipse.

For example, if you put "abc", you will get 3, but it should be 6.

 public void start(View v) {
     int sum = 0
     EditText name = (EditText)findViewById(R.id.editText);
     TextView result  = (TextView)findViewById(R.id.textView);

     String y = name.getText().toString();
     String[] array = y.split("");
     int[] x = new int[y.length()];

     for (int i = 0; i < y.length(); i++) {
         String letter = array[i];
         if (letter.equals("a")) {
             x[i] = 1;
         }
         if (letter.equals("b")) {
             x[i] = 2;
         }
         if (letter.equals("c")) {
             x[i] = 3;
         }

         sum = sum + x[i];
     }

     result.setText(Integer.toString(sum));
}

Layout:

 <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/editText"
        android:inputType="text"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentTop="true" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:id="@+id/button"
        android:layout_marginTop="48dp"
        android:layout_below="@+id/editText2"
        android:layout_centerHorizontal="true"
        android:onClick="start" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Text"
        android:id="@+id/textView"
        android:minHeight="50dp"
        android:layout_below="@+id/button"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

}

Your loop seems to be ok. Can you look at y.length result with a log ? Maybe the split didn't work correctly with "" ? Also try with "a b c" and split(" ") if the length actually equals 2 or the split is not right. Put a log on sum too in your loop and show us the result :) — Alexandre Martin
– Alexandre Martin, Commented Jun 29, 2016 at 12:06
I tried also to input "a" then show the result from first if but it shows 0 — user5386763
– user5386763, Commented Jun 29, 2016 at 12:15
if i put space after the input it will work fine but it is not what i want — user5386763
– user5386763, Commented Jun 29, 2016 at 12:16

earthw0rmjim · Accepted Answer · 2016-06-29 12:46:37Z

2

If you would like to stick to a String array, to properly split your String to characters, instead of the following:

String[] array = y.split("");

You should do something like this:

String[] array = y.split("(?!^)");

Splitting with "" as the regex will result in an empty string in your array at index 0.

Another option is to use a char array instead:

int sum = 0

EditText name = (EditText)findViewById(R.id.editText);
TextView result  = (TextView)findViewById(R.id.textView);

String y = name.getText().toString();

char[] array = y.toCharArray();
int[] x = new int[y.length()];

for (int i = 0; i < y.length(); i++) {
    char letter = array[i];
    if (letter == 'a') {
        x[i] = 1;
    }
    if (letter == 'b') {
        x[i] = 2;
    }
    if (letter == 'c') {
        x[i] = 3;
    }

    sum = sum + x[i];
}

result.setText(Integer.toString(sum));

edited Jun 29, 2016 at 12:46

answered Jun 29, 2016 at 12:15

earthw0rmjim

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Comments

Avinash Ranjan · Accepted Answer · 2016-06-29 12:34:07Z

0

One more solution to the above problem

int charTotal =0;
String input=editText.getText.toString().trim();
final static String alphabet="abcdefghijklmnopqrstuvwxyz";
for(int i=0;i<input.length();i++){
 charTotal = charTotal + alphabet.indexOf(input.charAt(i))+1;}
result.setText(String.valueOf(charTotal))

answered Jun 29, 2016 at 12:34

Avinash Ranjan

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