1 /* 2 * Copyright (C) 2014 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.support.wearable.notifications; 18 19 import android.animation.Animator; 20 import android.animation.AnimatorListenerAdapter; 21 import android.animation.ObjectAnimator; 22 import android.animation.PropertyValuesHolder; 23 import android.app.Activity; 24 import android.content.Context; 25 import android.os.Bundle; 26 import android.view.ViewGroup; 27 import android.view.animation.AccelerateDecelerateInterpolator; 28 import android.widget.FrameLayout; 29 import android.widget.ImageView; 30 import android.widget.TextView; 31 32 import java.util.Random; 33 34 /** 35 * Custom display activity for an animated sample notification. 36 */ 37 public class AnimatedNotificationDisplayActivity extends Activity { 38 public static final String EXTRA_TITLE = "title"; 39 40 private static final int BASE_ANIMATION_DURATION_MS = 2000; 41 42 private Random mRandom; 43 private int mAnimationRange; 44 private ImageView mImageView; 45 private Animator mAnimation; 46 47 @Override onCreate(Bundle savedInstanceState)48 protected void onCreate(Bundle savedInstanceState) { 49 super.onCreate(savedInstanceState); 50 setContentView(R.layout.activity_animated_notification_display); 51 52 mRandom = new Random(System.currentTimeMillis()); 53 mAnimationRange = getResources().getDimensionPixelSize(R.dimen.animation_range); 54 55 String title = getIntent().getStringExtra(EXTRA_TITLE); 56 ((TextView) findViewById(R.id.title)).setText(title); 57 58 mImageView = new ImageView(this); 59 mImageView.setImageResource(R.drawable.example_big_picture); 60 61 ImageZoomView zoomView = new ImageZoomView(this, mImageView, mAnimationRange); 62 zoomView.setLayoutParams(new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 63 ViewGroup.LayoutParams.MATCH_PARENT)); 64 65 ((FrameLayout) findViewById(R.id.container)).addView(zoomView, 0); 66 67 createNextAnimation(false); 68 } 69 createNextAnimation(boolean start)70 private void createNextAnimation(boolean start) { 71 float startX = mImageView.getTranslationX(); 72 float startY = mImageView.getTranslationY(); 73 float endX = -mRandom.nextInt(mAnimationRange); 74 float endY = -mRandom.nextInt(mAnimationRange); 75 float distance = (float) Math.sqrt(Math.pow(endX - startX, 2) + Math.pow(endY - startY, 2)); 76 77 mAnimation = ObjectAnimator.ofPropertyValuesHolder(mImageView, 78 PropertyValuesHolder.ofFloat("translationX", startX, endX), 79 PropertyValuesHolder.ofFloat("translationY", startY, endY)); 80 mAnimation.setInterpolator(new AccelerateDecelerateInterpolator()); 81 82 mAnimation.setDuration(Math.max(BASE_ANIMATION_DURATION_MS / 10, 83 (int) (distance * BASE_ANIMATION_DURATION_MS / mAnimationRange))); 84 85 mAnimation.addListener(new AnimatorListenerAdapter() { 86 @Override 87 public void onAnimationEnd(Animator animation) { 88 super.onAnimationEnd(animation); 89 createNextAnimation(true); 90 } 91 }); 92 if (start) { 93 mAnimation.start(); 94 } 95 } 96 97 @Override onResume()98 protected void onResume() { 99 super.onResume(); 100 mAnimation.start(); 101 } 102 103 @Override onPause()104 protected void onPause() { 105 mAnimation.pause(); 106 super.onPause(); 107 } 108 109 /** Helper view that zooms in on a child image view */ 110 private static class ImageZoomView extends ViewGroup { 111 private final int mZoomLength; 112 ImageZoomView(Context context, ImageView imageView, int zoomLength)113 public ImageZoomView(Context context, ImageView imageView, int zoomLength) { 114 super(context); 115 addView(imageView); 116 mZoomLength = zoomLength; 117 } 118 119 @Override onLayout(boolean changed, int left, int top, int right, int bottom)120 protected void onLayout(boolean changed, int left, int top, int right, int bottom) { 121 ImageView imageView = (ImageView) getChildAt(0); 122 123 // Resize the image view to be at least mZoomLength pixels larger in both 124 // dimensions than the containing view. 125 int imageWidth = imageView.getDrawable().getIntrinsicWidth(); 126 int imageHeight = imageView.getDrawable().getIntrinsicHeight(); 127 int minSize = Math.max(right - left, bottom - top) + mZoomLength; 128 if (imageWidth > imageHeight) { 129 imageWidth = minSize * imageWidth / imageHeight; 130 imageHeight = minSize; 131 } else { 132 imageHeight = minSize * imageHeight / imageWidth; 133 imageWidth = minSize; 134 } 135 imageView.layout(left, top, left + imageWidth, top + imageHeight); 136 } 137 } 138 } 139