character mapping in edittext android

Question

I want to make my edittext like when I write character "g" it's related mapping custom character should written like here in Hindi it's "जी"

I think there should be character mapping but having no knowledge can anybody help me how to do that

Other app https://play.google.com/store/apps/details?id=nichetech.hindi.editor is also doing same like this way, there is option available offline and online

Online is doing with help of google translator but if I choose Offline then writing happen like this way

Here you can see that Keyboard is English, but writing is done in Hindi language

Thanks

Is there way that I write in English and it's related mapping character will written in EditText of my application only.

Does anybody done like this way then please help me, how to do that

Answer 1

To accomplish what you're after, I would create a HashMap of chars that map to other chars. If some specific char is not mapped just print it out. Here's an example I've put up:

final HashMap<Character, Character> charMap = new HashMap<Character, Character>();
charMap.put('q', '1');
charMap.put('w', '2');
charMap.put('e', '3');
charMap.put('r', '4');
charMap.put('t', '5');
charMap.put('y', '6');

final EditText editText = (EditText) findViewById(R.id.editText);

editText.addTextChangedListener(new TextWatcher() {
    boolean replaced;

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        Log.e("TAG", start + " " + before + " " + count);
        // Check in lower case
        String oldStr = s.toString().toLowerCase();
        StringBuilder newStr = new StringBuilder(s);

        // Loop through changed chars
        for (int i = 0; i < count; i++) {
            // Replace if a substitution is avaiable
            Character replacement = charMap.get(oldStr.charAt(start + i));
            if (replacement != null) {
                replaced = true;
                newStr.setCharAt(start + i, replacement);
            }
        }

        if (replaced) {
            replaced = false;
            editText.setText(newStr);
            // Move cursor after the new chars
            editText.setSelection(start + count);
        }

    }

    @Override
    public void afterTextChanged(Editable s) {

    }
});

Pros:

• Ignores case when looking for a replacement. (q = Q = 1)
• Replaces immediately single and multiple chars
• Doesn't loop the whole string
• Can replace in the middle of another string

Cons:

• You have to have a HashMap entry for every character you want replaced
• ...

---

As a side-note I'd like to name a few limitations that your given app's "online version" has:

• The converting is done only when a space, new line or punctuation mark is entered.
• You cannot add letters to already converted words.

The apps "offline" version also has a minor bug:

• It doesn't convert words that are copied in or written with Swipe