IOS的用户体验做的很好，其中一点很重要的地方就是动画效果。
最近在学习Android的Animation，简单实现了一个IOS相机滤镜退出的动画：
布局文件：activity_animation_demo.xml 布局未考虑各个分辨率，只是为了实现动画逻辑，（代码测试是在720P分辨率的手机上）
1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 xmlns:tools="http://schemas.android.com/tools" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 tools:context="com.example.andanimationdemo.AnimationDemoActivity" > 6 7 <FrameLayout 8 android:layout_width="wrap_content" 9 android:layout_height="wrap_content" 10 android:layout_marginTop="50dp" 11 android:layout_marginLeft="25px" 12 android:layout_marginRight="25px" 13 > 14 <LinearLayout 15 android:id="@+id/rootLinearLayout" 16 android:layout_width="wrap_content" 17 android:layout_height="wrap_content" 18 android:orientation="vertical" 19 > 20 <LinearLayout 21 android:id="@+id/firstLinearLayout" 22 android:orientation="horizontal" 23 android:layout_width="wrap_content" 24 android:layout_height="wrap_content"> 25 <Button 26 android:id="@+id/Button_1" 27 android:layout_width="200px" 28 android:layout_height="200px" 29 android:background="@android:color/holo_blue_bright"/> 30 <Button 31 android:id="@+id/Button_2" 32 android:layout_width="200px" 33 android:layout_height="200px" 34 android:layout_marginLeft="35px" 35 android:background="@android:color/holo_green_light"/> 36 <Button 37 android:layout_marginLeft="35px" 38 android:id="@+id/Button_3" 39 android:layout_width="200px" 40 android:layout_height="200px" 41 android:background="@android:color/black"/> 42 </LinearLayout> 43 44 <LinearLayout 45 android:id="@+id/SencondLinearLayout" 46 android:layout_marginTop="35px" 47 android:orientation="horizontal" 48 android:layout_width="wrap_content" 49 android:layout_height="wrap_content"> 50 <Button 51 android:id="@+id/Button_4" 52 android:layout_width="200px" 53 android:layout_height="200px" 54 android:background="@android:color/holo_orange_dark"/> 55 <Button 56 android:id="@+id/Button_5" 57 android:layout_width="200px" 58 android:layout_height="200px" 59 android:layout_marginLeft="35px" 60 android:background="@android:color/holo_red_light"/> 61 <Button 62 android:layout_marginLeft="35px" 63 android:id="@+id/Button_6" 64 android:layout_width="200px" 65 android:layout_height="200px" 66 android:background="@android:color/darker_gray"/> 67 </LinearLayout> 68 69 <LinearLayout 70 android:id="@+id/ThirdLinearLayout" 71 android:layout_marginTop="35px" 72 android:orientation="horizontal" 73 android:layout_width="wrap_content" 74 android:layout_height="wrap_content"> 75 <Button 76 android:id="@+id/Button_7" 77 android:layout_width="200px" 78 android:layout_height="200px" 79 android:background="@android:color/holo_green_light"/> 80 <Button 81 android:id="@+id/Button_8" 82 android:layout_width="200px" 83 android:layout_height="200px" 84 android:layout_marginLeft="35px" 85 android:background="@android:color/holo_orange_light"/> 86 <Button 87 android:layout_marginLeft="35px" 88 android:id="@+id/Button_9" 89 android:layout_width="200px" 90 android:layout_height="200px" 91 android:background="@android:color/holo_blue_light"/> 92 </LinearLayout> 93 </LinearLayout> 94 </FrameLayout> 95 96 <Button 97 android:id="@+id/Reset" 98 android:layout_width="wrap_content" 99 android:layout_height="wrap_content" 100 android:layout_alignParentRight="true" 101 android:layout_alignParentBottom="true" 102 android:layout_marginRight="40dp" 103 android:layout_marginBottom="40dp" 104 android:text="Reset"></Button> 105 106 </RelativeLayout>
AnimationDemoActivity.java
1 package com.example.andanimationdemo;
2
3 import android.app.Activity;
4 import android.os.Bundle;
5 import android.util.Log;
6 import android.view.View;
7 import android.view.View.OnClickListener;
8 import android.view.animation.Animation;
9 import android.view.animation.Animation.AnimationListener;
10 import android.view.animation.ScaleAnimation;
11 import android.widget.Button;
12 import android.widget.LinearLayout;
13
14 public class AnimationDemoActivity extends Activity implements OnClickListener{
15
16 private static final String TAG = "AnimationDemo";
17 LinearLayout rootLinearLayout;
18 Button resetButton;
19 int mCurrentClickButtonId = -1;
20
21 int[] ButtonID = new int[] {
22 R.id.Button_1,R.id.Button_2,R.id.Button_3,
23 R.id.Button_4,R.id.Button_5,R.id.Button_6,
24 R.id.Button_7,R.id.Button_8,R.id.Button_9
25 };
26
27 @Override
28 protected void onCreate(Bundle savedInstanceState) {
29 super.onCreate(savedInstanceState);
30 setContentView(R.layout.activity_animation_demo);
31 rootLinearLayout = (LinearLayout) findViewById(R.id.rootLinearLayout);
32 resetButton = (Button) findViewById(R.id.Reset);
33 setButtonListener();
34 }
35
36 private void setButtonListener() {
37 for (int i = 0; i < ButtonID.length; i++) {
38 rootLinearLayout.findViewById(ButtonID[i]).setOnClickListener(this);
39 }
40 resetButton.setOnClickListener(this);
41 }
42
43 /**
44 * 点击某个按钮后，开始放大动画
45 * 这里提供的是一个思路，并不局限于当前布局，放大倍数，通过哪个点放大，都可以计算出来。
46 */
47 boolean onAnimationRunning = false;
48
49 public void onAnimationButtonClick() {
50 Log.d(TAG, "onAnimationButtonClick");
51 int[] position = new int[2];
52 int[] ButtonPosition = new int[2];
53 Button AnimaitonBtton = (Button) rootLinearLayout.findViewById(ButtonID[mCurrentClickButtonId - 1]);
54 rootLinearLayout.getLocationInWindow(position);
55 AnimaitonBtton.getLocationInWindow(ButtonPosition);
56 int rootWidth = rootLinearLayout.getWidth();
57 int rootHeight = rootLinearLayout.getHeight();
58 int ButtonWidth = AnimaitonBtton.getWidth();
59 int ButtonHeight = AnimaitonBtton.getHeight();
60
61 /**
62 * 计算 scale factor
63 */
64 float widthRate = (float)rootWidth/ButtonWidth;
65 float heightRate = (float)rootHeight/ButtonHeight;
66
67 /**
68 * 计算放大的中心点
69 */
70 float PointA = (ButtonPosition[0] - position[0]) * widthRate / (widthRate - 1);
71 float PointB = (ButtonPosition[1] - position[1]) * heightRate / (heightRate - 1);
72
73 onAnimationRunning = true;
74 ScaleAnimation mScaleAnimation = new ScaleAnimation(1.0f, widthRate, 1.0f, heightRate,PointA,PointB);
75 mScaleAnimation.setDuration(2000);
76 mScaleAnimation.setFillAfter(true);
77 mScaleAnimation.setAnimationListener(new AnimationListener() {
78
79 @Override
80 public void onAnimationStart(Animation animation) {
81 }
82
83 @Override
84 public void onAnimationRepeat(Animation animation) {
85 }
86
87 @Override
88 public void onAnimationEnd(Animation animation) {
89 Log.d(TAG,"onAnimationEnd");
90 onAnimationRunning = false;
91 for (int i = 0; i< ButtonID.length; i++) {
92 rootLinearLayout.findViewById(ButtonID[i]).setEnabled(false);
93 }
94 }
95 });
96 rootLinearLayout.startAnimation(mScaleAnimation);
97
98 }
99
100 @Override
101 public void onClick(View v) {
102 // TODO Auto-generated method stub
103 Log.d(TAG, "onClick :" + v.getId());
104 if (onAnimationRunning) {
105 Log.d(TAG, "onAnimationRunning = true");
106 return;
107 }
108
109 switch (v.getId()) {
110 case R.id.Button_1:
111 mCurrentClickButtonId = 1;
112 onAnimationButtonClick();
113 break;
114 case R.id.Button_2:
115 mCurrentClickButtonId = 2;
116 onAnimationButtonClick();
117 break;
118 case R.id.Button_3:
119 mCurrentClickButtonId = 3;
120 onAnimationButtonClick();
121 break;
122 case R.id.Button_4:
123 mCurrentClickButtonId = 4;
124 onAnimationButtonClick();
125 break;
126 case R.id.Button_5:
127 mCurrentClickButtonId = 5;
128 onAnimationButtonClick();
129 break;
130 case R.id.Button_6:
131 mCurrentClickButtonId = 6;
132 onAnimationButtonClick();
133 break;
134 case R.id.Button_7:
135 mCurrentClickButtonId = 7;
136 onAnimationButtonClick();
137 break;
138 case R.id.Button_8:
139 mCurrentClickButtonId = 8;
140 onAnimationButtonClick();
141 break;
142 case R.id.Button_9:
143 mCurrentClickButtonId = 9;
144 onAnimationButtonClick();
145 break;
146 case R.id.Reset:
147 mCurrentClickButtonId = -1;
148 rootLinearLayout.clearAnimation();
149 rootLinearLayout.postInvalidate();
150 for (int i = 0; i< ButtonID.length; i++) {
151 rootLinearLayout.findViewById(ButtonID[i]).setEnabled(true);
152 }
153 break;
154 default:
155 break;
156 }
157 }
158 }
点击某个Button后，可以通过它所在的位置坐标，以及父布局所在的位置坐标，计算出通过哪个点放大。
实现的效果如下图：
如有什么不对的地方，还望大神指正。
时间： 2024-10-12 15:56:51