An android EditText view, that calls a listener if the user leaves the edit field. (Closes the keyboard or moves to another focus)

UserAwareEditText.java

package com.example;

import android.content.Context;
import android.graphics.Rect;
import android.support.annotation.NonNull;
import android.util.AttributeSet;
import android.view.KeyEvent;

/**
 * https://developer.android.com/reference/android/widget/TextView.OnEditorActionListener.html
 * https://developer.android.com/reference/android/view/View.OnFocusChangeListener.html
 * https://developer.android.com/reference/android/text/TextWatcher.html
 * http://stackoverflow.com/questions/8063439/android-edittext-finished-typing-event
 * http://stackoverflow.com/questions/4312319/howto-capture-the-virtual-keyboard-show-hide-event-in-android
 * http://stackoverflow.com/questions/3425932/detecting-when-user-has-dismissed-the-soft-keyboard
 */
public class UserAwareEditText extends TypefaceEditText {

    public UserAwareEditText(Context context) {
        super(context);
        init();
    }

    public UserAwareEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public UserAwareEditText(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        isCurrentlyFocused = isFocused();
    }

    private boolean isCurrentlyFocused = false;
    private boolean textHasChanged = false;

    @Override
    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
        super.onFocusChanged(focused, direction, previouslyFocusedRect);

        if (isCurrentlyFocused && !focused) // lost focus
            userHasLeft();

        isCurrentlyFocused = focused;
    }

    @Override
    public boolean onKeyPreIme(int keyCode, @NonNull KeyEvent event) {

        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_UP)
            userHasLeft();

        return super.onKeyPreIme(keyCode, event);
    }

    @Override
    protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
        super.onTextChanged(text, start, lengthBefore, lengthAfter);

        textHasChanged = true;
    }

    private synchronized void userHasLeft() {
        if (!textHasChanged) {

            if (userListener != null) userListener.userHasLeft(this, false);

        } else {
            // rest
            textHasChanged = false;

            if (userListener != null) userListener.userHasLeft(this, true);
        }
    }

    private UserListener userListener;

    public void setUserListener(UserListener userListener) {
        this.userListener = userListener;
    }

    public interface UserListener {
        void userHasLeft(UserAwareEditText userAwareEditText, boolean textWasEdited);
    }

}

This does not work if the user presses "Done", you need to use something like this:

@Override
public void onEditorAction(int actionCode) 
{

super.onEditorAction(actionCode);

switch (actionCode) {
    case EditorInfo.IME_ACTION_DONE:
    case EditorInfo.IME_ACTION_GO:
    case EditorInfo.IME_ACTION_NEXT:
    case EditorInfo.IME_ACTION_PREVIOUS:
    case EditorInfo.IME_ACTION_SEARCH:
    case EditorInfo.IME_ACTION_SEND:
        userHasLeft();
        break;

    case EditorInfo.IME_ACTION_NONE:
    case EditorInfo.IME_ACTION_UNSPECIFIED:
    default:
        // ignore
        break;
}

}