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