Android: Detect softkeyboard open

Question

When the soft keyboard opens I want a scroll view to scroll down to the bottom.

For this I can use: fullScroll(View.FOCUS_DOWN);

But how do I fire that command after the soft keyboard opening event triggers?

Answer 1

@BoD's answer works fine if I remove the following line.

if (mPreviousHeight != 0) {
     /* other code is same, because
        mPreviousHeight is 0 when it comes first */
}

Answer 2

for this what i used to do same:

  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 ([e-mail])
     */
    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 ([e-mail])
     */
    @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();
            }
        }

    }
}

and in your Activity or fragment call this method in onCreate()

  private void hideAndShowKeyBOrd() {
        InputMethodManager im = (InputMethodManager) getActivity().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() {
                new Handler(Looper.getMainLooper()).post(new Runnable() {
                    @Override
                    public void run() {
                    }
                });
            }

            @Override
            public void onSoftKeyboardShow() {
                new Handler(Looper.getMainLooper()).post(new Runnable() {
                    @Override
                    public void run() {
                        if (viewV.getVisibility() == View.VISIBLE) {
                            viewV.setVisibility(View.GONE);
                        }
                    }
                });

            }
        });
    }

enjoy your code:)

Answer 3

watching the date , possibly you have a solution for your question, otherwise:

Here is the same response i made to another question related : Is there a way to tell if the soft-keyboard is shown?

but i copy full response here to avoid dead links:

Please check Configuration Changes for your Activity

This for your AndroidManifest.xml

and this for your Activity class http://developer.android.com/reference/android/app/Activity.html#onConfigurationChanged(android.content.res.Configuration)

You will need to @Override the public method onConfigurationChanged(android.content.res.Configuration) of your Activity to be able to handle, for example, this values:
hardKeyboardHidden,
keyboard,
keyboardHidden

For all possible values check http://developer.android.com/reference/android/content/res/Configuration.html

You will see there something like this:

HARDKEYBOARDHIDDEN_NO   
HARDKEYBOARDHIDDEN_UNDEFINED    
HARDKEYBOARDHIDDEN_YES  
KEYBOARDHIDDEN_NO   
KEYBOARDHIDDEN_UNDEFINED    
KEYBOARDHIDDEN_YES  
KEYBOARD_12KEY  
KEYBOARD_NOKEYS 
KEYBOARD_QWERTY 
KEYBOARD_UNDEFINED

Also there you will be able to read something like this:

public int  hardKeyboardHidden  A flag indicating whether the hard keyboard has been      hidden.
public int  keyboard    The kind of keyboard attached to the device.
public int  keyboardHidden  A flag indicating whether any keyboard is available.

UPDATE:

Here is a specific sample of what i´m talking about:

http://developer.android.com/guide/topics/resources/runtime-changes.html

    
@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);

    // Checks the orientation of the screen
    if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
        Toast.makeText(this, "landscape", Toast.LENGTH_SHORT).show();
    } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){
        Toast.makeText(this, "portrait", Toast.LENGTH_SHORT).show();
    }
    // Checks whether a hardware keyboard is available
    if (newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_NO) {
        Toast.makeText(this, "keyboard visible", Toast.LENGTH_SHORT).show();
    } else if (newConfig.hardKeyboardHidden == Configuration.HARDKEYBOARDHIDDEN_YES) {
        Toast.makeText(this, "keyboard hidden", Toast.LENGTH_SHORT).show();
    }
}

I hope this help you

Answer 4

Here is my solution:

1/ A simple interface

public interface KeyboardVisibilityListener {
    void onKeyboardVisibilityChanged(boolean keyboardVisible);
}

2/ A utility method (put it where you want, for instance in a class named KeyboardUtil)

public static void setKeyboardVisibilityListener(Activity activity, KeyboardVisibilityListener keyboardVisibilityListener) {
    View contentView = activity.findViewById(android.R.id.content);
    contentView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
        private int mPreviousHeight;

        @Override
        public void onGlobalLayout() {
            int newHeight = contentView.getHeight();
            if (mPreviousHeight != 0) {
                if (mPreviousHeight > newHeight) {
                    // Height decreased: keyboard was shown
                    keyboardVisibilityListener.onKeyboardVisibilityChanged(true);
                } else if (mPreviousHeight < newHeight) {
                    // Height increased: keyboard was hidden
                    keyboardVisibilityListener.onKeyboardVisibilityChanged(false);
                } else {
                    // No change
                }
            }
            mPreviousHeight = newHeight;
        }
    });
}

3/ Use from an Activity this way (a good place is in onCreate):

KeyboardUtil.setKeyboardVisibilityListener(this, mKeyboardVisibilityListener);

Answer 5

Per this post and this post on android-developers it doesn't seem like it's possible to do what you want. You may want to re-examine your use case for what you're doing. Maybe one of the softInputMode flags will work for you.

Answer 6

The only way I was able to work around this is by setting my activity's android:windowSoftInputMode="adjustResize" and then embed a custom "detector view" in the layout to handle a container size change and propagate that as a custom event (via a Listener) for soft keyboard on/off.

The following post describes an approach to implementing it: EditText does not trigger changes when back is pressed