A solution to catch show/hide soft keyboard events in Android http://felhr85.net/2014/05/04/catch-soft-keyboard-showhidden-events-in-android/

SoftKeyboard.java

/*
 * Author: Felipe Herranz (felhr85@gmail.com)
 * Contributors:Francesco Verheye (verheye.francesco@gmail.com)
 * 		Israel Dominguez (dominguez.israel@gmail.com)
 */	
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;

import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
 
public class SoftKeyboard implements View.OnFocusChangeListener
{
	private static final int CLEAR_FOCUS = 0;
	
	private ViewGroup layout;
	private int layoutBottom;
	private InputMethodManager im;
	private int[] coords;
	private boolean isKeyboardShow;
	private SoftKeyboardChangesThread softKeyboardThread;
	private List<EditText> editTextList;

	private View tempView; // reference to a focused EditText
	
	public SoftKeyboard(ViewGroup layout, InputMethodManager im)
	{
		this.layout = layout;
		keyboardHideByDefault();
		initEditTexts(layout);
		this.im = im;
		this.coords = new int[2];
		this.isKeyboardShow = false;
		this.softKeyboardThread = new SoftKeyboardChangesThread();
		this.softKeyboardThread.start();
	}
	
	
	public void openSoftKeyboard()
	{
		if(!isKeyboardShow)
		{
			layoutBottom = getLayoutCoordinates();
			im.toggleSoftInput(0, InputMethodManager.SHOW_IMPLICIT);
			softKeyboardThread.keyboardOpened();
			isKeyboardShow = true;
		}
	}
	
	public void closeSoftKeyboard()
	{
		if(isKeyboardShow)
		{
			im.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY, 0);
			isKeyboardShow = false;
		}
	}
	
	public void setSoftKeyboardCallback(SoftKeyboardChanged mCallback)
	{
		softKeyboardThread.setCallback(mCallback);
	}
	
	public void unRegisterSoftKeyboardCallback()
	{
		softKeyboardThread.stopThread();
	}
	
	public interface SoftKeyboardChanged 
	{
		public void onSoftKeyboardHide();
		public void onSoftKeyboardShow();	
	}
	
	private int getLayoutCoordinates()
	{
		layout.getLocationOnScreen(coords);
		return coords[1] + layout.getHeight();
	}
	
	private void keyboardHideByDefault()
	{
		layout.setFocusable(true);
		layout.setFocusableInTouchMode(true);
	}
	
	/*
	 * InitEditTexts now handles EditTexts in nested views
	 * Thanks to Francesco Verheye (verheye.francesco@gmail.com)
	 */
	private void initEditTexts(ViewGroup viewgroup) 
	{
		if(editTextList == null)
			editTextList = new ArrayList<EditText>();
		
		int childCount = viewgroup.getChildCount();
		for(int i=0; i<= childCount-1;i++) 
		{
			View v = viewgroup.getChildAt(i);

			if(v instanceof ViewGroup) 
			{
				initEditTexts((ViewGroup) v);
			}

			if(v instanceof EditText) 
			{
				EditText editText = (EditText) v;
				editText.setOnFocusChangeListener(this);
				editText.setCursorVisible(true);
				editTextList.add(editText);
			}
		}
	}

	/*
	 * OnFocusChange does update tempView correctly now when keyboard is still shown
	 * Thanks to Israel Dominguez (dominguez.israel@gmail.com)
	 */
	@Override
	public void onFocusChange(View v, boolean hasFocus) 
	{
		if(hasFocus) 
		{
			tempView = v;
			if(!isKeyboardShow) 
			{
				layoutBottom = getLayoutCoordinates();
				softKeyboardThread.keyboardOpened();
				isKeyboardShow = true;
			}
		}
	}
	
	// This handler will clear focus of selected EditText
	private final Handler mHandler = new Handler()
	{
		@Override
		public void handleMessage(Message m)
		{
			switch(m.what)
			{
			case CLEAR_FOCUS:
				if(tempView != null)
				{
					tempView.clearFocus();
					tempView = null;
				}
				break;
			}
		}
	};
	
	private class SoftKeyboardChangesThread extends Thread
	{
		private AtomicBoolean started;
		private SoftKeyboardChanged mCallback;
		
		public SoftKeyboardChangesThread()
		{
			started = new AtomicBoolean(true);
		}
		
		public void setCallback(SoftKeyboardChanged mCallback)
		{
			this.mCallback = mCallback;
		}
		
		@Override
		public void run()
		{
			while(started.get())
			{
				// Wait until keyboard is requested to open
				synchronized(this)
				{
					try 
					{
						wait();
					} catch (InterruptedException e) 
					{
						e.printStackTrace();
					}
				}
				
				int currentBottomLocation = getLayoutCoordinates();
				
				// There is some lag between open soft-keyboard function and when it really appears.
				while(currentBottomLocation == layoutBottom && started.get())
				{
					currentBottomLocation = getLayoutCoordinates();
				}
				
				if(started.get())
					mCallback.onSoftKeyboardShow();
				
				// When keyboard is opened from EditText, initial bottom location is greater than layoutBottom
				// and at some moment equals layoutBottom.
				// That broke the previous logic, so I added this new loop to handle this.
				while(currentBottomLocation >= layoutBottom && started.get())
				{
					currentBottomLocation = getLayoutCoordinates();
				}
				
				// Now Keyboard is shown, keep checking layout dimensions until keyboard is gone
				while(currentBottomLocation != layoutBottom && started.get())
				{
                                        synchronized(this)
					{
						try 
						{
							wait(500);
						} catch (InterruptedException e) 
						{
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
					}
					currentBottomLocation = getLayoutCoordinates();
				}
				
				if(started.get())
					mCallback.onSoftKeyboardHide();
				
				// if keyboard has been opened clicking and EditText.
				if(isKeyboardShow && started.get())
					isKeyboardShow = false;
				
				// if an EditText is focused, remove its focus (on UI thread)
				if(started.get())
					mHandler.obtainMessage(CLEAR_FOCUS).sendToTarget();
			}	
		}
		
		public void keyboardOpened()
		{
			synchronized(this)
			{
				notify();
			}
		}
		
		public void stopThread()
		{
			synchronized(this)
			{
				started.set(false);
				notify();
			}
		}
			
	}
}

SoftKeyboardHideShow.java

/*
* Android Manifest: android:windowSoftInputMode="adjustResize"
*/

/*
Somewhere else in your code
*/
RelativeLayout mainLayout = findViewById(R.layout.main_layout); // You must use the layout root
InputMethodManager im = (InputMethodManager) getSystemService(Service.INPUT_METHOD_SERVICE);
	
/*
Instantiate and pass a callback
*/
SoftKeyboard softKeyboard;
softKeyboard = new SoftKeyboard(mainLayout, im);
softKeyboard.setSoftKeyboardCallback(new SoftKeyboard.SoftKeyboardChanged()
{
 
	@Override
	public void onSoftKeyboardHide() 
	{
		// Code here
	}
 
	@Override
	public void onSoftKeyboardShow() 
	{
		// Code here
	}	
});
	
/*
Open or close the soft keyboard easily
*/
softKeyboard.openSoftKeyboard();
softKeyboard.closeSoftKeyboard();

/* Prevent memory leaks:
*/
@Override
public void onDestroy()
{
    super.onDestroy();
    softKeyboard.unRegisterSoftKeyboardCallback();
}

Any clue why the keyboardcallback isn't working anymore once you rotate your screen?

@neutronstein I finally managed to find what was happening in landscape mode. Basically, for some reason, currentBottomLocation keeps the same value of layoutBottom, so it quits from the loop in line 211 when it shouldn't. The easiest way to solve it is adding this option for each EditText in your layout:
android:imeOptions="flagNoExtractUi

With that option keyboard does not fill the whole screen (as by default does ) but it works as usual.

Thanks @felHR85

I tried using this code and i am setting the some imageview to visible , invisible in show hide callbacks. But it throws the exception "Only the original thread that created a view hierarchy can touch its views" . It seems from the code that you are creating a new thread and its not returning on main thread. Can you please check that and update

Hi @adc-msingla
Show/Hide callbacks are not in UI thread because they are called from a thread which is periodically checking the layout to find when keyboard is shown or not. Try this:

@Override
public void onSoftKeyboardHide() 
{
    // Code here
    new Handler(Looper.getMainLooper()).post(new Runnable() {
            @Override
            public void run() {
                // Code here will run in UI thread
                ...
            }
        });
}

@Override
public void onSoftKeyboardShow() 
{
    // Code here
    new Handler(Looper.getMainLooper()).post(new Runnable() {
            @Override
            public void run() {
                // Code here will run in UI thread
                ...
            }
        });

}   

This code not working at all. When I open up the soft keyboard then the code running down the onSoftKeyboardShow and then running down the onSoftKeyboardHide too. Tested on Android 5.1 Nexus 6.

When I just close the soft kb. nothing happening..

Hi @lacasrac. Is your app running on landscape?

Same as @lacasrac, it calls onSoftKeyboardShow then onSoftKeyboardHide but it does not hide the keyboard oO (on portrait and landscape)
5.0.2 Nexus 7

Does it work when android:windowSoftInputMode="adjustPan" ?

Thanks for this gist, but this code doesn't work, on Samsung Galaxy s5 kitkat and others, same as @lacasrac ... portrait and landscape orientation.

Any news about the problems? Maybe solved?

I have strange problem. I have got two Edittext in view. When I select the first one everything works fine, but when I selected the second one I get hide event

Hi, I have a weird issue where if i change some views visibly to GONE in onSoftKeyboardShow - than onSoftKyboardHide gets called (without keyboard being closed). any idea how can I use this to hide some views while keyboard is shown, and than show them when keyboard is hidden?

Hi @eladhackim and others. I've abandoned this for some months but it is time to check all the issues. I will spend time this weekend and probably I will release a little example app with the code in github.
Felipe

Thank you very much for this solution.

Is there any way to detect when the keyboard finished opening? I'm trying to smooth scrool to the last position of a reclycler view when the keyboard opens. Sometimes the scroll is done before the keyboard is fully opened. Since the Recyclerview gets resized by keyboard opening, it doesn't show the last item anymore :(

@felHR85: I have same question like @USHERBABY: Does it work when android:windowSoftInputMode="adjustPan" ?, bro

Thank you. Work for me.

@ https://gist.github.com/EtienneHanser

still not answer :(

Sorry! @EtienneHanser and many others with troubles with this snippet but I got too busy at this moment. This is really a hack (in both good and bad ways) so in some cases probably won't work because I soon realized that there are many differences in the way Android draws (for example the EditText displays the keyboard and the redraw is different than other cases, that was corrected).

I didn't try with the RecyclerView yet (I just started to use them recently!) but it would be nice if you can send me a little example to give it a look. Maybe it is not difficult and can be done quickly!

Of course, I encouraged everybody to add, modify and submit changes (gist doesn't have pull requests but you can send me an email with your versions and I will check it out).

Thank you guys.

Felipe

Hi, I try implements your code in my project and i have some error. My Phone Galaxy s4 Mini Kitkat

this is my error:

02-24 07:47:54.133 5911-6578/gramedia.com.gracom E/AndroidRuntime: FATAL EXCEPTION: Thread-2061
Process: gramedia.com.gracom, PID: 5911
java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
at android.os.Handler.(Handler.java:200)
at android.os.Handler.(Handler.java:114)
at android.widget.Toast$TN.(Toast.java:457)
at android.widget.Toast.(Toast.java:119)
at android.widget.Toast.makeText(Toast.java:286)
at gramedia.com.gracom.ActivityCheckIn$1.onSoftKeyboardShow(ActivityCheckIn.java:116)
at gramedia.com.gracom.SoftKeyboard$SoftKeyboardChangesThread.run(SoftKeyboard.java:201)

could you help me, whats wrong in my code ?

in my activity i wrote this attribute: android:windowSoftInputMode="adjustResize"

thank you very much.

sorry my english not good

thank you very much. it resolved my hard issues.

This does not work properly with fragments. Keyboard show method is being called but the Hide method is not being called. For Activity it is working fine.

@arshu-dev did you finally get the solution?

It works. Thank you! 💯

I have edittext in listview items .After back press when one item's edittext has focus and keypad is open ,method hidekeypad is not calling.
This class I want to use in listview but it is not working pls help for same

Here is Kotlin friendly change :)
https://gist.github.com/stasbar/095cb359846c225156fb15b3cc1eed86

Your code was not worked for me :'(
SoftKeyboard.SoftKeyboardChanged()
this method wasn't called ??

I use redmi note 4x, API 24

Guys it doen't work don't spent time on that

thank you very much.

Is there a Kotlin version of this?