編輯:關於android開發
IOS的用戶體驗做的很好,其中一點很重要的地方就是動畫效果。
最近在學習Android的Animation,簡單實現了一個IOS相機濾鏡退出的動畫:
布局文件:activity_animation_demo.xml 布局未考慮各個分辨率,只是為了實現動畫邏輯,(代碼測試是在720P分辨率的手機上)
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> View CodeAnimationDemoActivity.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 * 點擊某個按鈕後,開始放大動畫 45 * 這裡提供的是一個思路,並不局限於當前布局,放大倍數,通過哪個點放大,都可以計算出來。 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 * 計算 scale factor 63 */ 64 float widthRate = (float)rootWidth/ButtonWidth; 65 float heightRate = (float)rootHeight/ButtonHeight; 66 67 /** 68 * 計算放大的中心點 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 } View Code點擊某個Button後,可以通過它所在的位置坐標,以及父布局所在的位置坐標,計算出通過哪個點放大。
實現的效果如下圖:
如有什麼不對的地方,還望大神指正。
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