How to start two animations at same time in android?

I have two linear layouts which I want to perform two different animation on both of these layouts and at the same time.

Now its working in sequential manner. i.e, after completing one its starting another.

here is my code.

    Animation inFromRight = new TranslateAnimation(
                    Animation.RELATIVE_TO_PARENT, +0.0f,
                    Animation.RELATIVE_TO_PARENT, 0.0f,
                    Animation.RELATIVE_TO_PARENT, 0.0f,
                    Animation.RELATIVE_TO_PARENT, 0.0f);
            inFromRight.setDuration(500);
            inFromRight.setInterpolator(new AccelerateInterpolator());

    Animation outtoLeft = new TranslateAnimation(
                    Animation.RELATIVE_TO_PARENT, 0.0f,
                    Animation.RELATIVE_TO_PARENT, -1.0f,
                    Animation.RELATIVE_TO_PARENT, 0.0f,
                    Animation.RELATIVE_TO_PARENT, 0.0f);
            outtoLeft.setDuration(500);
            outtoLeft.setInterpolator(new AccelerateInterpolator());

    @Override
        public void onClick(View v) {
            switch (v.getId()) {
            case R.id.menu:
                            mainLayout.startAnimation(outtoLeft);
                sideBar.startAnimation(inFromRight);                
                break;
            }
        }

outtoLeft.setAnimationListener(new AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {
            }

            @Override
            public void onAnimationRepeat(Animation animation) {
            }

            @Override
            public void onAnimationEnd(Animation animation) {
                mainLayout
                        .setLayoutParams(new LayoutParams(
                                LayoutParams.FILL_PARENT,
                                LayoutParams.FILL_PARENT, 40));

            }
        });