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

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 charMap = new HashMap();
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