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 19 20 package com.example.android.batchstepsensor.cardstream; 21 22 import android.content.Context; 23 import android.util.AttributeSet; 24 import android.view.MotionEvent; 25 import android.view.ViewConfiguration; 26 import android.widget.RelativeLayout; 27 28 /** 29 * Custom Button with a special 'pressed' effect for touch events. 30 */ 31 public class CardLayout extends RelativeLayout { 32 33 private boolean mSwiping = false; 34 private float mDownX = 0.f; 35 private float mDownY = 0.f; 36 private float mTouchSlop = 0.f; 37 38 public CardLayout(Context context) { 39 super(context); 40 init(); 41 } 42 43 public CardLayout(Context context, AttributeSet attrs) { 44 super(context, attrs); 45 init(); 46 } 47 48 public CardLayout(Context context, AttributeSet attrs, int defStyle) { 49 super(context, attrs, defStyle); 50 init(); 51 } 52 53 private void init(){ 54 setFocusable(true); 55 setDescendantFocusability(FOCUS_AFTER_DESCENDANTS); 56 setWillNotDraw(false); 57 setClickable(true); 58 59 mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop() * 2.f; 60 } 61 62 @Override 63 public boolean onTouchEvent(MotionEvent event) { 64 switch(event.getAction()){ 65 case MotionEvent.ACTION_CANCEL: 66 case MotionEvent.ACTION_UP: 67 mSwiping = false; 68 break; 69 } 70 return super.onTouchEvent(event); 71 } 72 73 @Override 74 public boolean onInterceptTouchEvent(MotionEvent event) { 75 76 switch(event.getAction()){ 77 case MotionEvent.ACTION_MOVE: 78 if( !mSwiping ){ 79 mSwiping = Math.abs(mDownX - event.getX()) > mTouchSlop; 80 } 81 break; 82 case MotionEvent.ACTION_DOWN: 83 mDownX = event.getX(); 84 mDownY = event.getY(); 85 mSwiping = false; 86 break; 87 case MotionEvent.ACTION_CANCEL: 88 case MotionEvent.ACTION_UP: 89 mSwiping = false; 90 break; 91 } 92 return mSwiping; 93 } 94 }