这里写链接内容仿映客送小礼物的殊效，顺便温习1下属性动画，话不多说先看效果图。
可以看到全部动画有几部份组成，那我们就把每一个部份拆分出来各个击破。
1.要显示那些内容和内容间的位置关系？
可以看到我们要显示用户头像，昵称，礼物图标和数量。所以这里我选择用FrameLayout来作为根布局。
2.需要哪些动画和动画的履行顺序？
a.首先是整体从左到右飞入并有1个回弹（translationX + OvershootInterpolator）
b.然后是礼物从左到右飞入而且是1个带减速效果的（translationX + DecelerateInterpolator）
c.礼物数量顺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步消失（translationY + alpha）
3.送礼的区域有两块（A，B），如何分配？
由于用户送礼的数量不固定，所以动画延续的时间也不1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1个队列寄存这些礼物实例，A和B谁空闲，就分配给谁处理。
4.以上所有内容是不是使用原生的空间就可以实现？
正如上面的分析，我们有时操作整体，有时操作局部。这时候我们最好能自定义1个布局继承FrameLayout，其实也就是封装1层，这样我们就能够很好的控制全部布局。除此以外，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。
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1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，恢复本来的画笔
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色彩的设置
* @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 延续时间
* @return
* 创建1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，其中不但有单个的动画，还有组合动画。属性动画用起来方面而且功能10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。
Demo地址
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