content: /*
  * Copyright 2013 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
  
  
  package com.example.android.batchstepsensor.cardstream;
  
  import android.content.Context;
  import android.os.Build;
  import android.support.v4.view.ViewCompat;
  import android.util.AttributeSet;
  import android.view.MotionEvent;
  import android.view.animation.BounceInterpolator;
  import android.view.animation.DecelerateInterpolator;
  import android.widget.Button;
  
  /**
   * Custom Button with a special 'pressed' effect for touch events.
   */
  public class CardActionButton extends Button {
  
      public CardActionButton(Context context) {
          super(context);
      }
  
      public CardActionButton(Context context, AttributeSet attrs) {
          super(context, attrs);
      }
  
      public CardActionButton(Context context, AttributeSet attrs, int defStyle) {
          super(context, attrs, defStyle);
      }
  
      @Override
      public boolean onTouchEvent(MotionEvent event) {
  
          switch (event.getAction()) {
              case MotionEvent.ACTION_DOWN: {
                  setPressed(true);
                  if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
                      animate().scaleX(0.98f).scaleY(0.98f).setDuration(100)
                          .setInterpolator(new DecelerateInterpolator());
                  } else {
                      ViewCompat.setElevation(this, 8.f);
                  }
                  break;
              }
              case MotionEvent.ACTION_UP:
              case MotionEvent.ACTION_CANCEL: {
                  setPressed(false);
                  if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
                      animate().scaleX(1.f).scaleY(1.f).setDuration(50)
                          .setInterpolator(new BounceInterpolator());
                  } else {
                      ViewCompat.setElevation(this, 0.f);
                  }
                  break;
              }
          }
  
          return super.onTouchEvent(event);
      }
  
  }
  
  