最近把视图动画翻出来看一下,要知道动画主要分为两个主类,视图动画&属性动画。我这个功能就是用视图动画来实现的。老规矩先看一下效果图
效果图
实现思路 用的是一个缩放的动画,还有一个渐变的动画来实现的,放大的时候透明度逐渐变弱。细心的你一定看到有4个圆环,没错我这里用了4个ImageView,来执行这个这个组合动画,只不过每个View执行的时候,延迟一些时间。
上代码
(布局文件)
代码语言:javascript复制<?xml version="1.0" encoding="utf-8"?>
<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="match_parent"
android:background="#f8f8f8"
android:orientation="vertical">
<ImageView
android:id="@ id/iv_x1"
android:layout_width="140dp"
android:layout_height="140dp"
android:layout_gravity="center"
android:layout_marginTop="30dp"
android:background="@drawable/scan_cover"
/>
<ImageView
android:id="@ id/iv_x2"
android:layout_width="140dp"
android:layout_height="140dp"
android:layout_gravity="center"
android:layout_marginTop="30dp"
android:clickable="true"
android:background="@drawable/scan_cover"
/>
<ImageView
android:id="@ id/iv_x3"
android:layout_width="140dp"
android:layout_height="140dp"
android:layout_gravity="center"
android:layout_marginTop="30dp"
android:clickable="true"
android:background="@drawable/scan_cover"
/>
<ImageView
android:id="@ id/iv_x4"
android:layout_width="140dp"
android:layout_height="140dp"
android:layout_gravity="center"
android:layout_marginTop="30dp"
android:clickable="true"
android:background="@drawable/scan_cover"
/>
<TextView
android:id="@ id/start_can"
android:layout_width="135dp"
android:layout_height="135dp"
android:layout_gravity="center"
android:layout_marginTop="30dp"
android:background="@mipmap/icon_f" />
</FrameLayout>
scan_cover XML
代码语言:javascript复制<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="oval">
<solid android:color="#FF6C2F"></solid>
</shape>
动画 scale_alpha
代码语言:javascript复制<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="3100">
<scale
android:fromXScale="1.0"
android:fromYScale="1.0"
android:pivotX="50%"
android:pivotY="50%"
android:repeatCount="infinite"
android:toXScale="3"
android:toYScale="3" />
<alpha
android:repeatCount="infinite"
android:fromAlpha="0.5"
android:toAlpha="0" />
</set>
逻辑代码
代码语言:javascript复制/**
* Created by Xia_焱 on 2018/9/1.
* e-mail:XiahaotianV@163.com
*/
public class AnimationActivity extends BaseActivity{
private ImageView circle1;
private ImageView circle2;
private ImageView circle3;
private ImageView circle4;
@Override
public int getLayoutId() {
return R.layout.activity_animation;
}
@Override
protected void initView() {
final Animation animation1 = android.view.animation.AnimationUtils.loadAnimation(AnimationActivity.this, R.anim.scale_alpha);
final Animation animation2 = android.view.animation.AnimationUtils.loadAnimation(AnimationActivity.this, R.anim.scale_alpha);
final Animation animation3 = android.view.animation.AnimationUtils.loadAnimation(AnimationActivity.this, R.anim.scale_alpha);
final Animation animation4 = android.view.animation.AnimationUtils.loadAnimation(AnimationActivity.this, R.anim.scale_alpha);
circle1 = findViewById(R.id.iv_x1);
circle2 = findViewById(R.id.iv_x2);
circle3 = findViewById(R.id.iv_x3);
circle4 = findViewById(R.id.iv_x4);
TextView start_can = findViewById(R.id.start_can);
start_can.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
circle1.startAnimation(animation1);
animation2.setStartOffset(600);
circle2.startAnimation(animation2);
animation3.setStartOffset(1200);
circle3.startAnimation(animation3);
animation4.setStartOffset(1800);
circle4.startAnimation(animation4);
}
});
}
@Override
protected void initData() {
}
}
这样就可以实现了,那个基类我偷点懒 =_=! 就不换了