Soft keyboard open and close listener in an activity in Android

This only works when android:windowSoftInputMode of your activity is set to adjustResize in the manifest. You can use a layout listener to see if the root layout of your activity is resized by the keyboard.

I use something like the following base class for my activities:

public class BaseActivity extends Activity {
    private ViewTreeObserver.OnGlobalLayoutListener keyboardLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
        @Override
        public void onGlobalLayout() {
            int heightDiff = rootLayout.getRootView().getHeight() - rootLayout.getHeight();
            int contentViewTop = getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop();

            LocalBroadcastManager broadcastManager = LocalBroadcastManager.getInstance(BaseActivity.this);

            if(heightDiff <= contentViewTop){
                onHideKeyboard();

                Intent intent = new Intent("KeyboardWillHide");
                broadcastManager.sendBroadcast(intent);
            } else {
                int keyboardHeight = heightDiff - contentViewTop;
                onShowKeyboard(keyboardHeight);

                Intent intent = new Intent("KeyboardWillShow");
                intent.putExtra("KeyboardHeight", keyboardHeight);
                broadcastManager.sendBroadcast(intent);
            }
        }
    };

    private boolean keyboardListenersAttached = false;
    private ViewGroup rootLayout;

    protected void onShowKeyboard(int keyboardHeight) {}
    protected void onHideKeyboard() {}

    protected void attachKeyboardListeners() {
        if (keyboardListenersAttached) {
            return;
        }

        rootLayout = (ViewGroup) findViewById(R.id.rootLayout);
        rootLayout.getViewTreeObserver().addOnGlobalLayoutListener(keyboardLayoutListener);

        keyboardListenersAttached = true;
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        if (keyboardListenersAttached) {
            rootLayout.getViewTreeObserver().removeGlobalOnLayoutListener(keyboardLayoutListener);
        }
    }
}

The following example activity uses this to hide a view when the keyboard is shown and show it again when the keyboard is hidden.

The xml layout:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:id="@+id/rootLayout"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">              

    <ScrollView
        android:id="@+id/scrollView"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        >

        <!-- omitted for brevity -->

    </ScrollView>

    <LinearLayout android:id="@+id/bottomContainer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        >

        <!-- omitted for brevity -->

    </LinearLayout>

</LinearLayout>

And the activity:

public class TestActivity extends BaseActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test_activity);

        attachKeyboardListeners();
    }

    @Override
    protected void onShowKeyboard(int keyboardHeight) {
        // do things when keyboard is shown
        bottomContainer.setVisibility(View.GONE);
    }

    @Override
    protected void onHideKeyboard() {
        // do things when keyboard is hidden
        bottomContainer.setVisibility(View.VISIBLE);
    }        
}

Piece of cake with the awesome KeyboardVisibilityEvent library

KeyboardVisibilityEvent.setEventListener(
    getActivity(),
    new KeyboardVisibilityEventListener() {
        @Override
        public void onVisibilityChanged(boolean isOpen) {
            // Ah... at last. do your thing :)
        }
    });

Credits for Yasuhiro SHIMIZU

For Activity:

    final View activityRootView = findViewById(R.id.activityRoot);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                Rect r = new Rect();

                activityRootView.getWindowVisibleDisplayFrame(r);

                int heightDiff = view.getRootView().getHeight() - (r.bottom - r.top);
                if (heightDiff > 100) { 
                 //enter your code here
                }else{
                 //enter code for hid
                }
            }
        });

For Fragment:

    view = inflater.inflate(R.layout.live_chat_fragment, null);
view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                Rect r = new Rect();
                //r will be populated with the coordinates of your view that area still visible.
                view.getWindowVisibleDisplayFrame(r);

                int heightDiff = view.getRootView().getHeight() - (r.bottom - r.top);
                if (heightDiff > 500) { // if more than 100 pixels, its probably a keyboard...

                }
            }
        });

As Vikram pointed out in the comments, detecting whether the softkeyboard is shown or has disappeared is only possible with some ugly hacks.

Maybe it is enough to set a focus listener on the edittext:

yourEditText.setOnFocusChangeListener(new OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
        if (hasFocus) {
            //got focus
        } else {
            //lost focus
        }
   }
});