ChildAnimationExample.java

package com.tiger.quicknews.wedget.viewimage.Animations;

import android.util.Log;
import android.view.View;

import com.nineoldandroids.animation.ObjectAnimator;
import com.nineoldandroids.animation.ValueAnimator;
import com.tiger.quicknews.R;

public class ChildAnimationExample implements BaseAnimationInterface {

    private final static String TAG = "ChildAnimationExample";

    @Override
    public void onPrepareCurrentItemLeaveScreen(View current) {
        View descriptionLayout = current
                .findViewById(R.id.description_layout);
        if (descriptionLayout != null) {
            current.findViewById(R.id.description_layout)
                    .setVisibility(View.INVISIBLE);
        }
        Log.e(TAG, "onPrepareCurrentItemLeaveScreen called");
    }

    @Override
    public void onPrepareNextItemShowInScreen(View next) {
        View descriptionLayout = next
                .findViewById(R.id.description_layout);
        if (descriptionLayout != null) {
            next.findViewById(R.id.description_layout).setVisibility(
                    View.INVISIBLE);
        }
        Log.e(TAG, "onPrepareNextItemShowInScreen called");
    }

    @Override
    public void onCurrentItemDisappear(View view) {
        Log.e(TAG, "onCurrentItemDisappear called");
    }

    @Override
    public void onNextItemAppear(View view) {

        View descriptionLayout = view
                .findViewById(R.id.description_layout);
        if (descriptionLayout != null) {
            view.findViewById(R.id.description_layout).setVisibility(
                    View.VISIBLE);
            ValueAnimator animator = ObjectAnimator.ofFloat(
                    descriptionLayout, "y", -descriptionLayout.getHeight(),
                    0).setDuration(500);
            animator.start();
        }
        Log.e(TAG, "onCurrentItemDisappear called");
    }
}