Android key event for back key when soft keyboard is shown?

Question

I am trying to capture the \"back\" key event when the soft keyboard is shown.

I am using SDK ver 8 and can successfully capture the back key event ONLY when the sof

Answer 1

Here is the way to capture back press key event: 1. Extend editText view to override onKeyPreIme

package com.test.test;
import android.content.Context;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.widget.EditText;

/**
 * Created by sumit.saurabh on 11/10/16.
 */
public class ChatEditText extends EditText
{
    /* Must use this constructor in order for the layout files to instantiate the class properly */
    public ChatEditText(Context context, AttributeSet attrs)
    {
        super(context, attrs);
        // TODO Auto-generated constructor stub
    }

    private KeyImeChange keyImeChangeListener;

    public void setKeyImeChangeListener(KeyImeChange listener)
    {
        keyImeChangeListener = listener;
    }

    public interface KeyImeChange
    {
        public void onKeyIme(int keyCode, KeyEvent event);
    }

    @Override
    public boolean onKeyPreIme(int keyCode, KeyEvent event)
    {
        if (keyImeChangeListener != null)
        {
            keyImeChangeListener.onKeyIme(keyCode, event);
        }
        return false;
    }
}

2. ChatEditText in xml

3. Then attach a listener (setKeyImeChangeListener) to the edit text:

   private ChatEditText messageEditText;
   messageEditText =
      (ChatEditText) findViewById(R.id.messageEditText);
   
   messageEditText.setKeyImeChangeListener(new ChatEditText.KeyImeChange(){
       @Override
       public void onKeyIme(int keyCode, KeyEvent event)
       {
           if (KeyEvent.KEYCODE_BACK == event.getKeyCode())
           {
               // do something
           }
       }});