ScaleAnimation缩放动画
![](static/image/hrline/1.gif)
两种实现方式:
一、xml+java代码
在res下新建anim文件夹,在res/anim下新建scale.xml:
[XML] 纯文本查看 复制代码 <?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:duration="2000"
android:fillAfter="true"
android:fromXScale="0.0"
android:fromYScale="0.0"
android:interpolator="@android:anim/accelerate_decelerate_interpolator"
android:pivotX="50%"
android:pivotY="50%"
android:toXScale="1.0"
android:toYScale="1.0" />
</set>
activity_main.xml:
[XML] 纯文本查看 复制代码 <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:gravity="center">
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="scale"/>
</LinearLayout>
java代码:
[Java] 纯文本查看 复制代码 public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button button = (Button) findViewById(R.id.btn);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.scale);
button.startAnimation(animation);//开始动画
}
});
}
}
效果如下图:
二、java代码实现
[Java] 纯文本查看 复制代码 public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Button button = (Button) findViewById(R.id.btn);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//创建缩放动画对象
Animation animation = new ScaleAnimation(0, 1.0f, 0f, 1.0f);
//动画时间
animation.setDuration(1000);
//动画的重复次数
animation.setRepeatCount(-1);
animation.setFillAfter(true);
button.startAnimation(animation);
}
});
}
}
效果图:
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