這兩天無心間看到一園友的博文實現Path2.0中絢麗的的旋轉菜單,感受效果不錯,可是發現做者沒有處理線程安全的問題,因此在這裏我修正了下,而且改善下部分功能。今天發佈這篇文章的目的是但願能在Android用戶體驗上提出一些相關的解決方案,方便咱們在開發項目或產品時加強用戶體驗效果,固然也但願能起到拋磚引玉的做用。 html
廢話很少說,仍是老規矩,先讓咱們看一下實現的效果圖: java
在上圖中,我將菜單彈出的效果設置成直線型,最終的彈出或彙總點在下面的紅色按鈕中。 android
它的實現原理是設置動畫的同時並利用動畫中的插入器(interpolator)來實現彈力。主要用到了OvershootInterpolator和AnticipateOvershootInterpolator,簡單介紹下這兩個插入器。 算法
固然還有其它的插入器,簡要了解下其做用: spring
咱們能夠經過一些示例加深對這幾個插入器的瞭解。 數組
具體可查看官方文檔:http://developer.android.com/reference/android/view/animation/package-summary.html,這裏再也不詳述。 安全
先來了解下MainActivity中的代碼,以下所示: app
package com.spring.menu.activity; import com.spring.menu.R; import com.spring.menu.animation.SpringAnimation; import com.spring.menu.animation.EnlargeAnimationOut; import com.spring.menu.animation.ShrinkAnimationOut; import com.spring.menu.animation.ZoomAnimation; import com.spring.menu.utility.DeviceUtility; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.ViewGroup; import android.view.View.OnClickListener; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.view.animation.AnticipateInterpolator; import android.widget.RelativeLayout; /** * Android實現伸縮彈力分佈菜單效果 * @Description: Android實現伸縮彈力分佈菜單效果 * @File: MainActivity.java * @Package com.spring.menu.activity * @Author Hanyonglu * @Date 2012-10-25 下午09:41:31 * @Version V1.0 */ public class MainActivity extends Activity { private boolean areMenusShowing; private ViewGroup menusWrapper; private View imageViewPlus; private View shrinkRelativeLayout; private RelativeLayout layoutMain; // 順時針旋轉動畫 private Animation animRotateClockwise; // 你試着旋轉動畫 private Animation animRotateAntiClockwise; private Class[] intentActivity = { SecondActivity.class,ThreeActivity.class,FourActivity.class, SecondActivity.class,ThreeActivity.class,FourActivity.class}; private int[] mainResources = { R.drawable.bg_main_1,R.drawable.bg_main_2, R.drawable.bg_main_3,R.drawable.bg_main_4, R.drawable.bg_main_1,R.drawable.bg_main_4}; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_activity); // 初始化 initViews(); } // 初始化 private void initViews(){ imageViewPlus = findViewById(R.id.imageview_plus); menusWrapper = (ViewGroup) findViewById(R.id.menus_wrapper); shrinkRelativeLayout = findViewById(R.id.relativelayout_shrink); layoutMain = (RelativeLayout) findViewById(R.id.layout_content); animRotateClockwise = AnimationUtils.loadAnimation( this,R.anim.rotate_clockwise); animRotateAntiClockwise = AnimationUtils.loadAnimation( this,R.anim.rotate_anticlockwise); shrinkRelativeLayout.setOnClickListener(new OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub showLinearMenus(); } }); for (int i = 0; i < menusWrapper.getChildCount(); i++) { menusWrapper.getChildAt(i).setOnClickListener( new SpringMenuLauncher(null,mainResources[i])); } } /** * 以直線型展開菜單 */ private void showLinearMenus() { int[] size = DeviceUtility.getScreenSize(this); if (!areMenusShowing) { SpringAnimation.startAnimations( this.menusWrapper, ZoomAnimation.Direction.SHOW, size); this.imageViewPlus.startAnimation(this.animRotateClockwise); } else { SpringAnimation.startAnimations( this.menusWrapper, ZoomAnimation.Direction.HIDE, size); this.imageViewPlus.startAnimation(this.animRotateAntiClockwise); } areMenusShowing = !areMenusShowing; } // 分佈菜單事件監聽器 private class SpringMenuLauncher implements OnClickListener { private final Class cls; private int resource; private SpringMenuLauncher(Class c,int resource) { this.cls = c; this.resource = resource; } public void onClick(View v) { // TODO Auto-generated method stub MainActivity.this.startSpringMenuAnimations(v); layoutMain.setBackgroundResource(resource); // MainActivity.this.startActivity( // new Intent( // MainActivity.this, // MainActivity.SpringMenuLauncher.this.cls)); } } /** * 展示菜單動畫效果 * @param view * @param runnable */ private void startSpringMenuAnimations(View view) { areMenusShowing = true; Animation shrinkOut1 = new ShrinkAnimationOut(300); Animation growOut = new EnlargeAnimationOut(300); shrinkOut1.setInterpolator(new AnticipateInterpolator(2.0F)); shrinkOut1.setAnimationListener(new Animation.AnimationListener() { public void onAnimationEnd(Animation animation) { // TODO Auto-generated method stub MainActivity.this.imageViewPlus.clearAnimation(); } public void onAnimationRepeat(Animation animation) { // TODO Auto-generated method stub } public void onAnimationStart(Animation animation) { // TODO Auto-generated method stub } }); view.startAnimation(growOut); } }
在點擊紅色按鈕時彈出最上面的菜單,點擊某個菜單時變換上面的背景圖片,固然也可直接進入某個Activity。因此上面定義了intentActivity和mainResources兩個數組,分別表明切換的Activity和要變換的圖片。你們可根據實際的須要進行設置。在進行點擊紅色按鈕時中間的加號向右進行旋轉225變成叉號,經過以下的動畫: ide
再次點擊則向左旋轉還原,將上面的android:fromDegrees和android:toDegrees替換下便可。 佈局
下面瞭解下另外一個重要的動畫類是SpringAnimation,由它來控制各個菜單的動畫效果,代碼以下所示:
package com.spring.menu.animation; import com.spring.menu.control.ImageButtonExtend; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.MarginLayoutParams; import android.view.animation.AnticipateInterpolator; import android.view.animation.AnticipateOvershootInterpolator; import android.view.animation.OvershootInterpolator; import android.view.animation.TranslateAnimation; /** * 分佈菜單加載和伸縮動畫 * @Description: 分佈菜單加載和伸縮動畫 * @File: SpringAnimation.java * @Package com.spring.menu.animation * @Author Hanyonglu * @Date 2012-10-25 下午12:18:39 * @Version V1.0 */ public class SpringAnimation extends ZoomAnimation { private static int[] size; private static int xOffset = 210; private static int yOffset = -15; public static final int DURATION = 300; /** * 構造器 * @param direction * @param duration * @param view */ public SpringAnimation(Direction direction, long duration, View view) { super(direction, duration, new View[] { view }); SpringAnimation.xOffset = SpringAnimation.size[0] / 2 - 30; } /**
百搜技術網:http://www.baisoujs.com * 開始顯示動畫效果 * @param viewgroup * @param direction * @param size */ public static void startAnimations(ViewGroup viewgroup, ZoomAnimation.Direction direction, int[] size) { SpringAnimation.size = size; switch (direction) { case HIDE: startShrinkAnimations(viewgroup); break; case SHOW: startEnlargeAnimations(viewgroup); break; } } /** * 開始呈現菜單 * @param viewgroup */ private static void startEnlargeAnimations(ViewGroup viewgroup) { for (int i = 0; i < viewgroup.getChildCount(); i++) { if (viewgroup.getChildAt(i) instanceof ImageButtonExtend) { ImageButtonExtend inoutimagebutton = (ImageButtonExtend) viewgroup .getChildAt(i); SpringAnimation animation = new SpringAnimation( ZoomAnimation.Direction.HIDE, DURATION, inoutimagebutton); animation.setStartOffset((i * 200) / (-1 + viewgroup.getChildCount())); animation.setInterpolator(new OvershootInterpolator(4F)); inoutimagebutton.startAnimation(animation); } } } /** * 開始隱藏菜單 * @param viewgroup */ private static void startShrinkAnimations(ViewGroup viewgroup) { for (int i = 0; i < viewgroup.getChildCount(); i++) { if (viewgroup.getChildAt(i) instanceof ImageButtonExtend) { ImageButtonExtend inoutimagebutton = (ImageButtonExtend) viewgroup .getChildAt(i); SpringAnimation animation = new SpringAnimation( ZoomAnimation.Direction.SHOW, DURATION, inoutimagebutton); animation.setStartOffset((100 * ((-1 + viewgroup .getChildCount()) - i)) / (-1 + viewgroup.getChildCount())); animation.setInterpolator(new AnticipateOvershootInterpolator(2F)); inoutimagebutton.startAnimation(animation); } } } @Override protected void addShrinkAnimation(View[] views) { // TODO Auto-generated method stub MarginLayoutParams mlp = (MarginLayoutParams) views[0]. getLayoutParams(); addAnimation(new TranslateAnimation( xOffset + -mlp.leftMargin, F,yOffset + mlp.bottomMargin, 0F)); } @Override protected void addEnlargeAnimation(View[] views) { // TODO Auto-generated method stub MarginLayoutParams mlp = (MarginLayoutParams) views[0]. getLayoutParams(); addAnimation(new TranslateAnimation( F, xOffset + -mlp.leftMargin, F,yOffset + mlp.bottomMargin)); } }
該類繼承自ZoomAnimation,關於ZoomAnimation代碼以下:
package com.spring.menu.animation; import android.view.View; import android.view.animation.AnimationSet; /** * 放大縮小動畫類 * @Description: 放大縮小動畫類 * @File: ZoomAnimation.java * @Package com.spring.menu.animation * @Author Hanyonglu * @Date 2012-10-25 下午11:37:52 * @Version V1.0 */ public abstract class ZoomAnimation extends AnimationSet { public Direction direction; public enum Direction { HIDE, SHOW; } public ZoomAnimation(Direction direction, long duration, View[] views) { super(true); this.direction = direction; switch (this.direction) { case HIDE: addShrinkAnimation(views); break; case SHOW: addEnlargeAnimation(views); break; } setDuration(duration); } protected abstract void addShrinkAnimation(View[] views); protected abstract void addEnlargeAnimation(View[] views); }
有時咱們爲了加強用戶體驗,咱們能夠將直線設置成半圓形或是半橢圓形,能夠利用Bresenham算法或是其它的方案實現半圓或半橢圓的菜單,而不是簡單的將菜單定位在某個地方。關於這個,有興趣的朋友可參閱相關資料去實現它。
另外,上面的例子並無實現動態的設置菜單的個數。我的以爲最好能動態設置菜單的佈局,這樣在添加或減小菜單時比較方便。通常的過程是利用一個數組(表明圖片資源),根據數組來實現它的佈局。包括上段中提到的實現半圓形展開也要進行動態的設置。原本我想去實現它,可是真的沒有那麼多時間,有須要的朋友能夠去填充程序的SpringMenuLayout類,在這裏我就不去實現它了。
package com.spring.menu.layout; /** * 實現伸縮彈力分佈菜單佈局類 * @Description: 實現伸縮彈力分佈菜單佈局類 * @File: SpringMenuLayout.java * @Package com.spring.menu.layout * @Author Hanyonglu * @Date 2012-10-26 下午07:57:56 * @Version V1.0 */ public class SpringMenuLayout { // 自動生成直線型佈局 // 自動生成圓弧型佈局 }
以上是關於Android中實現伸縮彈力分佈菜單效果的實現過程。