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      1 /*
      2 * Copyright 2013 The Android Open Source Project
      3 *
      4 * Licensed under the Apache License, Version 2.0 (the "License");
      5 * you may not use this file except in compliance with the License.
      6 * You may obtain a copy of the License at
      7 *
      8 *     http://www.apache.org/licenses/LICENSE-2.0
      9 *
     10 * Unless required by applicable law or agreed to in writing, software
     11 * distributed under the License is distributed on an "AS IS" BASIS,
     12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13 * See the License for the specific language governing permissions and
     14 * limitations under the License.
     15 */
     16 
     17 
     18 package com.example.android.batchstepsensor.cardstream;
     19 
     20 import android.content.Context;
     21 import android.os.Build;
     22 import android.support.v4.view.ViewCompat;
     23 import android.util.AttributeSet;
     24 import android.view.MotionEvent;
     25 import android.view.animation.BounceInterpolator;
     26 import android.view.animation.DecelerateInterpolator;
     27 import android.widget.Button;
     28 
     29 /**
     30  * Custom Button with a special 'pressed' effect for touch events.
     31  */
     32 public class CardActionButton extends Button {
     33 
     34     public CardActionButton(Context context) {
     35         super(context);
     36     }
     37 
     38     public CardActionButton(Context context, AttributeSet attrs) {
     39         super(context, attrs);
     40     }
     41 
     42     public CardActionButton(Context context, AttributeSet attrs, int defStyle) {
     43         super(context, attrs, defStyle);
     44     }
     45 
     46     @Override
     47     public boolean onTouchEvent(MotionEvent event) {
     48 
     49         switch (event.getAction()) {
     50             case MotionEvent.ACTION_DOWN: {
     51                 setPressed(true);
     52                 if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
     53                     animate().scaleX(0.98f).scaleY(0.98f).setDuration(100)
     54                         .setInterpolator(new DecelerateInterpolator());
     55                 } else {
     56                     ViewCompat.setElevation(this, 8.f);
     57                 }
     58                 break;
     59             }
     60             case MotionEvent.ACTION_UP:
     61             case MotionEvent.ACTION_CANCEL: {
     62                 setPressed(false);
     63                 if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
     64                     animate().scaleX(1.f).scaleY(1.f).setDuration(50)
     65                         .setInterpolator(new BounceInterpolator());
     66                 } else {
     67                     ViewCompat.setElevation(this, 0.f);
     68                 }
     69                 break;
     70             }
     71         }
     72 
     73         return super.onTouchEvent(event);
     74     }
     75 
     76 }
     77 
     78