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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 package com.example.android.batchstepsensor.cardstream;
     18 
     19 import android.content.Context;
     20 import android.os.Build;
     21 import android.support.v4.view.ViewCompat;
     22 import android.util.AttributeSet;
     23 import android.view.MotionEvent;
     24 import android.view.animation.BounceInterpolator;
     25 import android.view.animation.DecelerateInterpolator;
     26 import android.widget.Button;
     27 
     28 /**
     29  * Custom Button with a special 'pressed' effect for touch events.
     30  */
     31 public class CardActionButton extends Button {
     32 
     33     public CardActionButton(Context context) {
     34         super(context);
     35     }
     36 
     37     public CardActionButton(Context context, AttributeSet attrs) {
     38         super(context, attrs);
     39     }
     40 
     41     public CardActionButton(Context context, AttributeSet attrs, int defStyle) {
     42         super(context, attrs, defStyle);
     43     }
     44 
     45     @Override
     46     public boolean onTouchEvent(MotionEvent event) {
     47 
     48         switch (event.getAction()) {
     49             case MotionEvent.ACTION_DOWN: {
     50                 setPressed(true);
     51                 if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
     52                     animate().scaleX(0.98f).scaleY(0.98f).setDuration(100)
     53                         .setInterpolator(new DecelerateInterpolator());
     54                 } else {
     55                     ViewCompat.setElevation(this, 8.f);
     56                 }
     57                 break;
     58             }
     59             case MotionEvent.ACTION_UP:
     60             case MotionEvent.ACTION_CANCEL: {
     61                 setPressed(false);
     62                 if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
     63                     animate().scaleX(1.f).scaleY(1.f).setDuration(50)
     64                         .setInterpolator(new BounceInterpolator());
     65                 } else {
     66                     ViewCompat.setElevation(this, 0.f);
     67                 }
     68                 break;
     69             }
     70         }
     71 
     72         return super.onTouchEvent(event);
     73     }
     74 
     75 }
     76 
     77