android app show keyboard when edit

// find EditText by id
EditText myEditText= (EditText) findViewById(R.id.myEditTextID);
myEditText.requestFocus();

InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);

// show keyboard when the EditText is focused
imm.showSoftInput(myEditText, InputMethodManager.SHOW_IMPLICIT);