android - Implementing onKeyPreIme(int keyCode, KeyEvent event) in Fragment

Question

I cannot figure how to implement onKeyPreIme(int keyCode, KeyEvent event) in a Fragment.

@Override
public boolean onKeyPreIme(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK && 
        event.getAction() == KeyEvent.ACTION_UP) {
            // do your stuff
            return false;
    }
    return super.dispatchKeyEvent(event);
}

I tried a lot but nothing works. Also, I could not find anything on Google or Stack Overflow. I would like to perform an action when the back key is pressed and the softkeyboard is up. Setting an onKeyListener on my EditTexts did not work, since KeyEvent.KEYCODE_BACK is not called when the soft keyboard is up. I appreciate any help and source code.

Answer 1

This is my solution and it works really well for me, but everyones needs are different.

First i subclassed EditText and hooked up a listener (Google should make this the default)

public class ListenerEditText extends EditText {

    private KeyImeChange keyImeChangeListener;

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

    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;
    }
}

Then you can attach a listener from anywhere like so:

myListenerEditText.setKeyImeChangeListener(new KeyImeChange() {

    @Override
    public void onKeyIme(int keyCode, KeyEvent event) {
        // All keypresses with the keyboard open will come through here!
        // You could also bubble up the true/false if you wanted 
        // to disable propagation.
    }
});