1 /* 2 * Copyright (C) 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.insertingcells; 18 19 import android.animation.ObjectAnimator; 20 import android.animation.PropertyValuesHolder; 21 import android.animation.ValueAnimator; 22 import android.content.Context; 23 import android.graphics.Canvas; 24 import android.graphics.Color; 25 import android.graphics.Paint; 26 import android.util.AttributeSet; 27 import android.view.View; 28 29 /** 30 * This round view draws a circle from which the image pops out of and into 31 * the corresponding cell in the list. 32 */ 33 public class RoundView extends View { 34 35 private final int STROKE_WIDTH = 6; 36 private final int RADIUS = 20; 37 private final int ANIMATION_DURATION = 300; 38 private final float SCALE_FACTOR = 0.3f; 39 40 private Paint mPaint; 41 RoundView(Context context)42 public RoundView(Context context) { 43 super(context); 44 init(); 45 } 46 RoundView(Context context, AttributeSet attrs)47 public RoundView(Context context, AttributeSet attrs) { 48 super(context, attrs); 49 init(); 50 } 51 RoundView(Context context, AttributeSet attrs, int defStyle)52 public RoundView(Context context, AttributeSet attrs, int defStyle) { 53 super(context, attrs, defStyle); 54 init(); 55 } 56 init()57 private void init() { 58 mPaint = new Paint(); 59 mPaint.setAntiAlias(true); 60 mPaint.setColor(Color.WHITE); 61 mPaint.setStyle(Paint.Style.STROKE); 62 mPaint.setStrokeWidth(STROKE_WIDTH); 63 } 64 65 @Override onDraw(Canvas canvas)66 protected void onDraw(Canvas canvas) { 67 canvas.drawCircle(canvas.getWidth() / 2, canvas.getHeight() / 2, 68 RADIUS, mPaint); 69 } 70 getScalingAnimator()71 public ObjectAnimator getScalingAnimator() { 72 PropertyValuesHolder imgViewScaleY = PropertyValuesHolder.ofFloat(View 73 .SCALE_Y, SCALE_FACTOR); 74 PropertyValuesHolder imgViewScaleX = PropertyValuesHolder.ofFloat(View 75 .SCALE_X, SCALE_FACTOR); 76 77 ObjectAnimator imgViewScaleAnimator = ObjectAnimator 78 .ofPropertyValuesHolder(this, imgViewScaleX, imgViewScaleY); 79 imgViewScaleAnimator.setRepeatCount(1); 80 imgViewScaleAnimator.setRepeatMode(ValueAnimator.REVERSE); 81 imgViewScaleAnimator.setDuration(ANIMATION_DURATION); 82 83 return imgViewScaleAnimator; 84 } 85 } 86