Use "ENTER" key on softkeyboard instead of clicking button

You do it by setting a OnKeyListener on your EditText.

Here is a sample from my own code. I have an EditText named addCourseText, which will call the function addCourseFromTextBox when either the enter key or the d-pad is clicked.

addCourseText = (EditText) findViewById(R.id.clEtAddCourse);addCourseText.setOnKeyListener(new OnKeyListener(){    public boolean onKey(View v, int keyCode, KeyEvent event)    {        if (event.getAction() == KeyEvent.ACTION_DOWN)        {            switch (keyCode)            {                case KeyEvent.KEYCODE_DPAD_CENTER:                case KeyEvent.KEYCODE_ENTER:                    addCourseFromTextBox();                    return true;                default:                    break;            }        }        return false;    }});

<EditText    android:id="@+id/search"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:hint="@string/search_hint"    android:inputType="text"    android:imeOptions="actionSend" />

You can then listen for presses on the action button by defining a TextView.OnEditorActionListener for the EditText element. In your listener, respond to the appropriate IME action ID defined in the EditorInfo class, such as IME_ACTION_SEND. For example:

EditText editText = (EditText) findViewById(R.id.search);editText.setOnEditorActionListener(new OnEditorActionListener() {    @Override    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {        boolean handled = false;        if (actionId == EditorInfo.IME_ACTION_SEND) {            sendMessage();            handled = true;        }        return handled;    }});

Source: https://developer.android.com/training/keyboard-input/style.html

may be you could add a attribute to your EditText like this:

android:imeOptions="actionSearch"