Question

I want to access a keyboard via Bluetooth.

For example :
Two devices connect each other via Bluetooth if I open keyboard in the first device, and I want access that keyboard in another device in any edittext.

So how can I access that keyboard in another device via bluetooth in android?

Answer 1

To detect a EditText keyboard popping up :

Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    final int proposedheight = MeasureSpec.getSize(heightMeasureSpec);
    final int actualHeight = getHeight();

    if (actualHeight > proposedheight){
        // Keyboard is shown
    } else {
        // Keyboard is hidden
    }

    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}

---

To capture a key event

final EditText edittext = (EditText) findViewById(R.id.edittext);
edittext.setOnKeyListener(new OnKeyListener() {
    public boolean onKey(View v, int keyCode, KeyEvent event) {
        // If the event is a key-down event on the "enter" button
        if (event.getAction() == KeyEvent.ACTION_DOWN) 

         // keycode should be sent over bluetooth. 

          return true;
        }
        return false;
    }
});

---

To inject keypresses in your Activity simply call onKeyDown() with the appropriate KeyEvent

---

To open up a keyboard

EditText editText = (EditText) findViewById(R.id.myEdit);
InputMethodManager mgr = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
// only will trigger it if no physical keyboard is open
mgr.showSoftInput(editText, InputMethodManager.SHOW_IMPLICIT);

and close it :

InputMethodManager mgr = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
mgr.hideSoftInputFromWindow(editText.getWindowToken(), 0);

If you are not interested in popping up the keyboard on the other phone, simply ignore this section. Use the good old : setText()

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Now how you form the chatting protocol by which Bluetooth sends these key events is up to you.Hint: RemoteDroid used OscMessages