ANDROID笔记:动画anim

package com.example.android_shape;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;

public class AnimActivity extends Activity {
    ImageView imageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_anim);
        imageView = (ImageView) findViewById(R.id.imageView1);

    }

    public void btnclick(View view) {
        Animation animation;
        switch (view.getId()) {
        case R.id.button1:
            // 加载动画
            animation = AnimationUtils.loadAnimation(AnimActivity.this,
                    R.anim.alpha);
            imageView.setAnimation(animation);

            break;
        case R.id.button2:

            animation = AnimationUtils.loadAnimation(AnimActivity.this,
                    R.anim.scale);
            imageView.setAnimation(animation);
            break;
        case R.id.button3:

            animation = AnimationUtils.loadAnimation(AnimActivity.this,
                    R.anim.translate);
            imageView.setAnimation(animation);
            break;
        case R.id.button4:

            animation = AnimationUtils.loadAnimation(AnimActivity.this,
                    R.anim.roate);
            imageView.setAnimation(animation);
            break;
        case R.id.button5:

            animation = AnimationUtils.loadAnimation(AnimActivity.this,
                    R.anim.all);
            imageView.setAnimation(animation);
            break;
        }
    }
}

activity_anim.xml

<?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" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_launcher" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="btnclick"
            android:text="透明度" />

        <Button
            android:id="@+id/button2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="btnclick"
            android:text="缩放" />

        <Button
            android:id="@+id/button3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="btnclick"
            android:text="位移" />

        <Button
            android:id="@+id/button4"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="btnclick"
            android:text="旋转" />

        <Button
            android:id="@+id/button5"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="btnclick"
            android:text="全部" />
    </LinearLayout>

</LinearLayout>

/res/anim/alpha.xml(透明度)

<?xml version="1.0" encoding="utf-8"?>
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="2000"
    android:fillAfter="true"
    android:fromAlpha="1"
    android:toAlpha="0.5" />
<!-- 透明度 -->

/res/anim/rotate.xml(旋转)

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fillAfter="true"
    android:fromDegrees="0"
    android:pivotX="50%"
    android:pivotY="50%"
    android:duration="2000"
    android:toDegrees="180" />
<!-- fromDegrees 原始角度 -->
<!-- toDegrees 目标角度 -->
<!-- pivotX，pivotY 中心点 -->

/res/anim/scale.xml(缩放)

<?xml version="1.0" encoding="utf-8"?>
<scale xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="2000"
    android:fillAfter="true"
    android:fromXScale="1.0"
    android:fromYScale="1.0"
    android:pivotX="50%"
    android:pivotY="50%"
    android:toXScale="2.0"
    android:toYScale="0.5" />
<!-- 缩放 -->
<!-- android:fillAfter="true" 是否要保持动画后的状态 -->

/res/anim/translate.xml(位移)

<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="2000"
    android:fromXDelta="0"
    android:fromYDelta="0"
    android:toXDelta="200"
    android:toYDelta="200" />
<!-- 位移 -->
<!-- 都是以中心点计算 -->

/res/anim/all.xml(全部动画集合)

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" >

    <alpha
        android:duration="2000"
        android:fillAfter="true"
        android:fromAlpha="1"
        android:toAlpha="0.5" />

    <rotate
        android:duration="2000"
         android:fillAfter="true"
        android:fromDegrees="0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toDegrees="180" />

    <scale
        android:duration="2000"
        android:fillAfter="true"
        android:fromXScale="1.0"
        android:fromYScale="1.0"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toXScale="2.0"
        android:toYScale="0.5" />

    <translate
        android:duration="2000"
        android:fillAfter="false"
        android:fromXDelta="0"
        android:fromYDelta="0"
        android:toXDelta="200"
        android:toYDelta="200" />
    <!--
         <translate
        android:duration="2000"
        android:fillAfter="false"
        android:fromXDelta="0"
        android:fromYDelta="0"
        android:startOffset="2000"
        android:toXDelta="0"
        android:toYDelta="200" />

    -->

</set> <!-- 动画集合 -->

android:startOffset="2000"   动画延迟