Hide keyboard, when click out of edit text.

EditTextsOutOfRange

/**
 * @author "Sumtsov Vlad"
 * idicates when user clicked on out of range of all activity edittexts
 */
import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.EditText;
import android.widget.FrameLayout;

public class EditTextsOutOfRange {

    private static final int interceptViewId = 21342341;
    private ViewGroup rootView;
    private OutOfEditTextsClicked outOfRangeListener;
    private List<View> editTexts;

    /**
     * @param view
     *            checked view on out of range click
     * @param listener
     *            listener for outRange event
     */
    public EditTextsOutOfRange(OutOfEditTextsClicked listener, Context context) {
	if (context == null) {
	    return;
	}
	
	editTexts = new ArrayList<View>();
	
	rootView = (ViewGroup) ((Activity)context).getWindow().getDecorView().getRootView();
	
	View interceptView = rootView.findViewById(interceptViewId);
	if (interceptView == null) {
	    interceptView = new View(context);
	    LayoutParams params = new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
	    interceptView.setLayoutParams(params);
	    interceptView.setId(interceptViewId);
	    outOfRangeListener = listener;
	    rootView.addView(interceptView);
	}
	interceptView.setOnTouchListener(touchListener);
    }

    private OnTouchListener touchListener = new OnTouchListener() {

	@Override
	public boolean onTouch(View v, MotionEvent event) {

	    boolean hasSomeViewInRange = false;
	    View focusedView = rootView;

	    getEditTexts(rootView);
	    
	    for (View view : editTexts) {

		int[] editLocation = new int[2];
		view.getLocationOnScreen(editLocation);

		int[] location = new int[2];
		v.getLocationOnScreen(location);

		float eventX = event.getX();
		float eventY = event.getY();

		int editTextX = editLocation[0] - location[0];
		int editTextY = editLocation[1] - location[1];

		boolean isXinRange = isCoorndInRange(eventX, editTextX, editTextX + view.getWidth());
		boolean isYinRange = isCoorndInRange(eventY, editTextY, editTextY + view.getHeight());
		if (isXinRange && isYinRange) {
		    hasSomeViewInRange = true;
		    break;
		}
		
		if (view.isFocused()) {
		    focusedView = view;
		}
	    }

	    if (!hasSomeViewInRange) {
		outOfRangeListener.onOutOfEditTextsClicked(focusedView);
	    }
	    return false;
	}

    };

    private void getEditTexts(ViewGroup viewGroup) {
	for (int i = 0; i < viewGroup.getChildCount(); i++) {
	    View view = viewGroup.getChildAt(i);
	    if(view instanceof ViewGroup) {
		getEditTexts((ViewGroup)view);
	    } else if (view instanceof EditText) {
		editTexts.add(view);
	    }
	}
    }

    private boolean isCoorndInRange(float eventCoord, int minCoord, int maxCoord) {
	return (eventCoord < maxCoord) && (eventCoord > minCoord);
    }

    public interface OutOfEditTextsClicked {

	/**
	 * @param view
	 *            which is checked on out of range click
	 */
	void onOutOfEditTextsClicked(View view);
    }
}