这里写链接内容仿映客送小礼物的特效，顺便复习一下属性动画，话不多说先看效果图。
需求分析
可以看到整个动画有几部分组成，那我们就把每个部分拆分出来各个击破。
1.要显示那些内容以及内容间的位置关系？
可以看到我们要显示用户头像，昵称，礼物图标以及数量。所以这里我选择用FrameLayout来作为根布局。
2.需要哪些动画以及动画的执行顺序？
a.首先是整体从左到右飞入并有一个回弹（translationX + OvershootInterpolator）
b.然后是礼物从左到右飞入而且是一个带减速效果的（translationX + DecelerateInterpolator）
c.礼物数量依次累加同时伴随着缩放（scale+repeat）
d.后面的粒子效果（帧动画）
e.整体向上平移并且逐渐消失（translationY + alpha）
3.送礼的区域有两块（A，B），如何分配？
因为用户送礼的数量不固定，所以动画持续的时间也不一定。但是我们希望这两块区域能得到充分的使用，即我们需要一个队列存放这些礼物实例，A和B谁空闲，就分配给谁处理。
4.以上所有内容是否使用原生的空间就能实现？
正如上面的分析，我们有时操作整体，有时操作局部。这时我们最好能自定义一个布局继承FrameLayout，其实也就是封装一层，这样我们就可以很好的控制整个布局。除此之外，还有我们注意到礼物数量是带描边的，貌似需要我们自定义实现了。
功能实现
需求分析完了，接下来我们说说功能的实现。
首先来打我们的整体布局。
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="wrap_content"> <RelativeLayout android:id="@+id/animation_person_rl" android:layout_width="wrap_content" android:layout_height="39dp" android:layout_gravity="left" android:layout_marginTop="22dp" android:background="@drawable/bg_giftlayout"> <ImageView android:id="@+id/gift_userheader_iv" android:layout_width="39dp" android:layout_height="39dp" android:layout_margin="3dp" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:src="@mipmap/ember" /> <TextView android:id="@+id/gift_usernickname_tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="6dp" android:layout_marginTop="4dp" android:layout_toRightOf="@id/gift_userheader_iv" android:text="库日天" android:textColor="#ffffff" android:textSize="12sp" /> <TextView android:id="@+id/gift_usersign_tv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@id/gift_usernickname_tv" android:layout_below="@id/gift_usernickname_tv" android:layout_marginTop="4dp" android:ellipsize="end" android:text="送一个超级无敌" android:textColor="#ffea79" android:textSize="11sp" /> <ImageView android:id="@+id/animation_gift" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_toRightOf="@id/gift_usersign_tv" android:background="@mipmap/diamond2x" /> </RelativeLayout> <ImageView android:id="@+id/animation_light" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="120dp" android:src="@drawable/light_star_anim" /> <com.example.work.animationdemo.StrokeTextView android:id="@+id/animation_num" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="185dp" android:layout_marginTop="12dp" android:text="x 1" android:textColor="#0076ff" android:textSize="24sp" app:innnerColor="#ffffff" app:outerColor="#0076ff" /> </FrameLayout>
这里比较简单不多说了，重点看下StrokeTextView，带描边的textview，其实就是重写了ondraw方法先绘制外层，在绘制内层。
@Override protected void onDraw(Canvas canvas) { if (m_bDrawSideLine) { // 描外层 setTextColorUseReflection(mOuterColor); m_TextPaint.setStrokeWidth(5); m_TextPaint.setStyle(Paint.Style.FILL_AND_STROKE); super.onDraw(canvas); // 描内层，恢复原先的画笔 setTextColorUseReflection(mInnerColor); m_TextPaint.setStrokeWidth(0); m_TextPaint.setStyle(Paint.Style.FILL_AND_STROKE); } super.onDraw(canvas); } /** * 使用反射的方法进行字体颜色的设置 * @param color */ private void setTextColorUseReflection(int color) { Field textColorField; try { textColorField = TextView.class.getDeclaredField("mCurTextColor"); textColorField.setAccessible(true); textColorField.set(this, color); textColorField.setAccessible(false); } catch (NoSuchFieldException e) { e.printStackTrace(); } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } m_TextPaint.setColor(color); }
定义礼物的实体类
public class GiftSendModel { private int giftCount; private String userAvatarRes; private String nickname; private String sig; private int giftRes; private String gift_id; private int star; public GiftSendModel(int giftCount) { this.giftCount = giftCount; } public int getGiftCount() { return giftCount; } public void setGiftCount(int giftCount) { this.giftCount = giftCount; } ......
封装整体布局
public class GiftFrameLayout extends FrameLayout { private LayoutInflater mInflater; RelativeLayout anim_rl; ImageView anim_gift, anim_light, anim_header; TextView anim_nickname, anim_sign; StrokeTextView anim_num; /** * 礼物数量的起始值 */ int starNum = 1; int repeatCount = 0; private boolean isShowing = false; public GiftFrameLayout(Context context) { this(context, null); } public GiftFrameLayout(Context context, AttributeSet attrs) { super(context, attrs); mInflater = LayoutInflater.from(context); initView(); } private void initView() { View view = mInflater.inflate(R.layout.animation, this, false); anim_rl = (RelativeLayout) view.findViewById(R.id.animation_person_rl); anim_gift = (ImageView) view.findViewById(R.id.animation_gift); anim_light = (ImageView) view.findViewById(R.id.animation_light); anim_num = (StrokeTextView) view.findViewById(R.id.animation_num); anim_header = (ImageView) view.findViewById(R.id.gift_userheader_iv); anim_nickname = (TextView) view.findViewById(R.id.gift_usernickname_tv); anim_sign = (TextView) view.findViewById(R.id.gift_usersign_tv); this.addView(view); } public void hideView() { anim_gift.setVisibility(INVISIBLE); anim_light.setVisibility(INVISIBLE); anim_num.setVisibility(INVISIBLE); } public void setModel(GiftSendModel model){ if (0!=model.getGiftCount()) { this.repeatCount = model.getGiftCount(); } if (!TextUtils.isEmpty(model.getNickname())) { anim_nickname.setText(model.getNickname()); } if (!TextUtils.isEmpty(model.getSig())) { anim_sign.setText(model.getSig()); } } public boolean isShowing(){ return isShowing; } public AnimatorSet startAnimation( final int repeatCount) { hideView(); //布局飞入 ObjectAnimator flyFromLtoR = GiftAnimationUtil.createFlyFromLtoR(anim_rl, -getWidth(), 0, 400,new OvershootInterpolator()); flyFromLtoR.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationStart(Animator animation) { super.onAnimationStart(animation); GiftFrameLayout.this.setVisibility(View.VISIBLE); GiftFrameLayout.this.setAlpha(1f); isShowing = true; anim_num.setText("x " + 1); Log.i("TAG", "flyFromLtoR A start"); } }); //礼物飞入 ObjectAnimator flyFromLtoR2 = GiftAnimationUtil.createFlyFromLtoR(anim_gift, -getWidth(), 0, 400,new DecelerateInterpolator()); flyFromLtoR2.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationStart(Animator animation) { anim_gift.setVisibility(View.VISIBLE); } @Override public void onAnimationEnd(Animator animation) { GiftAnimationUtil.startAnimationDrawable(anim_light); anim_num.setVisibility(View.VISIBLE); } }); //数量增加 ObjectAnimator scaleGiftNum = GiftAnimationUtil.scaleGiftNum(anim_num, repeatCount); scaleGiftNum.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationRepeat(Animator animation) { anim_num.setText("x " + (++starNum)); } }); //向上渐变消失 ObjectAnimator fadeAnimator = GiftAnimationUtil.createFadeAnimator(GiftFrameLayout.this, 0, -100, 300, 400); fadeAnimator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { GiftFrameLayout.this.setVisibility(View.INVISIBLE); } }); // 复原 ObjectAnimator fadeAnimator2 = GiftAnimationUtil.createFadeAnimator(GiftFrameLayout.this, 100, 0, 20, 0); AnimatorSet animatorSet = GiftAnimationUtil.startAnimation(flyFromLtoR, flyFromLtoR2, scaleGiftNum, fadeAnimator, fadeAnimator2); animatorSet.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { starNum = 1; isShowing = false; } }); return animatorSet;
我们将所有的动画方法都写到了GiftAnimationUtil中便于管理
public class GiftAnimationUtil { /** * @param target * @param star 动画起始坐标 * @param end 动画终止坐标 * @param duration 持续时间 * @return * 创建一个从左到右的飞入动画 * 礼物飞入动画 */ public static ObjectAnimator createFlyFromLtoR(final View target, float star, float end, int duration, TimeInterpolator interpolator) { //1.个人信息先飞出来 ObjectAnimator anim1 = ObjectAnimator.ofFloat(target, "translationX", star, end); anim1.setInterpolator(interpolator); anim1.setDuration(duration); return anim1; } /** * @param target * @return * 播放帧动画 */ public static AnimationDrawable startAnimationDrawable(ImageView target){ AnimationDrawable animationDrawable = (AnimationDrawable) target.getDrawable(); if(animationDrawable!=null) { target.setVisibility(View.VISIBLE); animationDrawable.start(); } return animationDrawable; } /** * @param target * @param drawable * 设置帧动画 */ public static void setAnimationDrawable(ImageView target, AnimationDrawable drawable){ target.setBackground(drawable); } /** * @param target * @param num * @return * 送礼数字变化 */ public static ObjectAnimator scaleGiftNum(final TextView target , int num){ PropertyValuesHolder anim4 = PropertyValuesHolder.ofFloat("scaleX", 1.7f, 0.8f,1f); PropertyValuesHolder anim5 = PropertyValuesHolder.ofFloat("scaleY", 1.7f, 0.8f,1f); PropertyValuesHolder anim6 = PropertyValuesHolder.ofFloat("alpha", 1.0f, 0f,1f); ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(target, anim4, anim5, anim6).setDuration(480); animator.setRepeatCount(num); return animator; } /** * @param target * @param star * @param end * @param duration * @param startDelay * @return * 向上飞 淡出 */ public static ObjectAnimator createFadeAnimator(final View target, float star, float end, int duration, int startDelay){ PropertyValuesHolder translationY = PropertyValuesHolder.ofFloat("translationY", star,end); PropertyValuesHolder alpha = PropertyValuesHolder.ofFloat("alpha", 1.0f,0f); ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(target, translationY, alpha); animator.setStartDelay(startDelay); animator.setDuration(duration); return animator; } /** * @param animators * @return * 按顺序播放动画 */ public static AnimatorSet startAnimation(ObjectAnimator animator1, ObjectAnimator animator2, ObjectAnimator animator3, ObjectAnimator animator4, ObjectAnimator animator5){ AnimatorSet animSet = new AnimatorSet(); // animSet.playSequentially(animators); animSet.play(animator1).before(animator2); animSet.play(animator3).after(animator2); animSet.play(animator4).after(animator3); animSet.play(animator5).after(animator4); animSet.start(); return animSet; } }
所有的动画效果均是用属性动画完成，其中不仅有单个的动画，还有组合动画。属性动画用起来方面而且功能十分强大！
最后看下MainActivity中的实现
public class MainActivity extends AppCompatActivity { private GiftFrameLayout giftFrameLayout1; private GiftFrameLayout giftFrameLayout2; List<GiftSendModel> giftSendModelList = new ArrayList<GiftSendModel>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); giftFrameLayout1 = (GiftFrameLayout) findViewById(R.id.gift_layout1); giftFrameLayout2 = (GiftFrameLayout) findViewById(R.id.gift_layout2); findViewById(R.id.action).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { starGiftAnimation(createGiftSendModel()); } }); } private GiftSendModel createGiftSendModel(){ return new GiftSendModel((int)(Math.random()*10)); } private void starGiftAnimation(GiftSendModel model){ if (!giftFrameLayout1.isShowing()) { sendGiftAnimation(giftFrameLayout1,model); }else if(!giftFrameLayout2.isShowing()){ sendGiftAnimation(giftFrameLayout2,model); }else{ giftSendModelList.add(model); } } private void sendGiftAnimation(final GiftFrameLayout view, GiftSendModel model){ view.setModel(model); AnimatorSet animatorSet = view.startAnimation(model.getGiftCount()); animatorSet.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { super.onAnimationEnd(animation); synchronized (giftSendModelList) { if (giftSendModelList.size() > 0) { view.startAnimation(giftSendModelList.get(giftSendModelList.size() - 1).getGiftCount()); giftSendModelList.remove(giftSendModelList.size() - 1); } } } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } }
其中关于缓存区的策略大家可以根据实际需求进行定制。
以上所述是小编给大家介绍的Android开发仿映客送礼物效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！