1在res文件夹下新建一个anim文件夹
2.创建xml文件,并首先加入set标签,改标签如下:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/accelerate_interpolator">
</set>
3.在该标签中加入rotate,alpha,scale或translate标签
4.在代码中使用AnimationUtils当中装载xml文件,并生成Animation对象
下面是代码
MainActivity.java
package com.yx.animations01;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.AnimationUtils;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends Activity {
private Button scaleButton=null;
private Button rotateButton=null;
private Button alphaButton=null;
private Button translateButton=null;
private ImageView imageView = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
scaleButton = (Button) findViewById(R.id.scaleButton);
scaleButton.setOnClickListener(new scaleButtonListener());
rotateButton = (Button) findViewById(R.id.rotateButton);
rotateButton.setOnClickListener(new rotateButtonListener());
alphaButton = (Button) findViewById(R.id.alphaButton);
alphaButton.setOnClickListener(new alphaButtonListener());
translateButton = (Button) findViewById(R.id.translateButton);
translateButton.setOnClickListener(new translateButtonListener());
imageView = (ImageView) findViewById(R.id.imageViewId);
}
class scaleButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.scale);
imageView.startAnimation(animation);
}
}
class rotateButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.rotate);
imageView.startAnimation(animation);
}
}
//淡入淡出
class alphaButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
//使用AnimationUtils装载动画设置文件
Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.alpha);
imageView.startAnimation(animation);
}
}
class translateButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
Animation animation = AnimationUtils.loadAnimation(MainActivity.this, R.anim.translate);
imageView.startAnimation(animation);
}
}
}
下面分别是四个xml
alpha.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/accelerate_interpolator">
<alpha android:fromAlpha="1.0"
android:toAlpha="0.0"
android:startOffset="500"
android:duration="500"></alpha>
</set>
rotate.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/accelerate_interpolator">
<rotate android:fromDegrees="0"
android:toDegrees="+350"
android:pivotX="50%"
android:pivotY="50%"
android:duration="3000"></rotate>
<!--
android:pivotX的值有三种设置方法
android:pivotX="50"这种方法使用绝对定位
android:pivotX="50%"这种方法为相对控件本身的定位
android:pivotX="50%p"这种方法相对于控件的父控件定位
-->
</set>
scale.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/accelerate_interpolator">
<scale
android:fromXScale="1.0"
android:toXScale="0.0"
android:fromYScale="1.0"
android:toYScale="0.0"
android:pivotX="50%"
android:pivotY="50%"
android:duration="2000"
></scale>
</set>
translate.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/accelerate_interpolator">
<translate android:fromXDelta="50%"
android:toXDelta="100%"
android:fromYDelta="0%"
android:toYDelta="100%"
android:duration="2000"
/>
</set>
注意xml文件的放置位置