Android动画——放大、缩小、旋转、平移、组合

Animation定义属性的步骤和程序

使用步骤：
1、在res目录下创建anim文件，编写xml文件的动画效果
Alpha：
fromAlpha（开始的透明度）
toAlpha（结束时的透明度）
repeatCount（重复次数）
duration（使用时长，毫秒为单位）

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">    <alpha         android:fromAlpha="0.2"                android:toAlpha="1.0"        android:duration="1000"        android:repeatCount="1"        /></set>

Translate：
fromXDelta（开始平移的ｘ坐标）
fillAfter（是否记录终止位置，如果为true则会停止在最终位置）
toXDelta（停止平移的X坐标位置）
interpolator（设置加速过程，加速的形式很多，比如先加后减、自由落体的效果等）

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android" >    <translate        android:duration="1000"        android:fillAfter="false"        android:fromXDelta="0"        android:fromYDelta="0"        android:interpolator="@android:anim/accelerate_decelerate_interpolator"        android:toXDelta="200"        android:toYDelta="200"         /></set>

Rotate：
fromDegrees(开始旋转的角度)
toDegrees（停止旋转的角度）

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">    <rotate                 android:fromDegrees="0"        android:toDegrees="360"        android:duration="1000"        /></set>

Scale ：
pivotX/pivotY:以哪个点进行缩放

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">    <scale        android:fromXScale="0"        android:toXScale="1"        android:fromYScale="0"        android:toYScale="1"      android:duration="2000"      android:pivotX="100"      android:pivotY="100"        /></set>

2、MainActivity中的调用:

 case R.id.button_animation:                Animation animation= AnimationUtils.loadAnimation(getApplicationContext(),R.anim.animation);                mImageView.startAnimation(animation);                break;

总结：上面这种定义属性的方法和下面主函数里的AnimationSet产生的效果是一样的,都是几种效果一起实现。

 AnimationSet animationSet = new AnimationSet(false);                AlphaAnimation animation1 = new AlphaAnimation(0.0f, 1.0f);                TranslateAnimation animation2 = new TranslateAnimation(-mImageView.getMeasuredWidth(), 0, 0, 0);                RotateAnimation animation3 = new RotateAnimation(0, 360);                ScaleAnimation animation4 = new ScaleAnimation(1, 0.5f, 1, 0.5f);                animation1.setDuration(3000);                animation2.setDuration(3000);                animation3.setDuration(3000);                animation4.setDuration(3000);                animationSet.addAnimation(animation1);                animationSet.addAnimation(animation2);                animationSet.addAnimation(animation3);                animationSet.addAnimation(animation4);                mImageView.startAnimation(animationSet);

主函数

public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private Button mButtonAlpha;    private Button mButtonTranslation;    private Button mButtonScaleReduce;    private Button mButtonScaleIncrease;    private Button mButtonXuan;    private Button mButtonCollect;    private ImageView mImageView;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mButtonAlpha = (Button) findViewById(R.id.button_alpha);        mButtonTranslation = (Button) findViewById(R.id.button_translation);        mButtonScaleReduce = (Button) findViewById(R.id.button_scale_reduce);        mButtonXuan = (Button) findViewById(R.id.button_xuanzhuan);        mButtonScaleIncrease = (Button) findViewById(R.id.button_scale_increase);        mButtonCollect = (Button) findViewById(R.id.button_collect);        mImageView = (ImageView) findViewById(R.id.imageview);        mButtonAlpha.setOnClickListener(this);        mButtonTranslation.setOnClickListener(this);        mButtonXuan.setOnClickListener(this);        mButtonScaleReduce.setOnClickListener(this);        mButtonScaleIncrease.setOnClickListener(this);        mButtonCollect.setOnClickListener(this);    }    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.button_alpha:                AlphaAnimation animation = new AlphaAnimation(0.0f, 1.0f);                animation.setDuration(3000);                mImageView.startAnimation(animation);                break;            case R.id.button_translation:                TranslateAnimation translateAnimation = new TranslateAnimation(-mImageView.getMeasuredWidth(), 0, 0, 0);                translateAnimation.setDuration(3000);                mImageView.startAnimation(translateAnimation);                break;            case R.id.button_xuanzhuan:                RotateAnimation rotateAnimation = new RotateAnimation(0, 360);                rotateAnimation.setDuration(3000);                mImageView.startAnimation(rotateAnimation);                break;            case R.id.button_scale_reduce:                ScaleAnimation scaleAnimation = new ScaleAnimation(1, 0.5f, 1, 0.5f);                scaleAnimation.setDuration(3000);                mImageView.startAnimation(scaleAnimation);                break;            case R.id.button_scale_increase:                ScaleAnimation scaleAnimation1 = new ScaleAnimation(0.5f, 1, 0.5f, 1);                scaleAnimation1.setDuration(3000);                mImageView.startAnimation(scaleAnimation1);                break;            case R.id.button_collect:                AnimationSet animationSet = new AnimationSet(false);                AlphaAnimation animation1 = new AlphaAnimation(0.0f, 1.0f);                TranslateAnimation animation2 = new TranslateAnimation(-mImageView.getMeasuredWidth(), 0, 0, 0);                RotateAnimation animation3 = new RotateAnimation(0, 360);                ScaleAnimation animation4 = new ScaleAnimation(1, 0.5f, 1, 0.5f);                animation1.setDuration(3000);                animation2.setDuration(3000);                animation3.setDuration(3000);                animation4.setDuration(3000);                animationSet.addAnimation(animation1);                animationSet.addAnimation(animation2);                animationSet.addAnimation(animation3);                animationSet.addAnimation(animation4);                mImageView.startAnimation(animationSet);                break;        }    }}

布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:paddingBottom="@dimen/activity_vertical_margin"    android:background="#ee82ee"    android:orientation="vertical" tools:context=".MainActivity"><Button    android:text="透明"    android:id="@+id/button_alpha"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    />    <Button        android:text="平移"        android:id="@+id/button_translation"        android:layout_width="wrap_content"        android:layout_height="wrap_content"/>    <Button        android:text="旋转"        android:id="@+id/button_xuanzhuan"        android:layout_width="wrap_content"        android:layout_height="wrap_content"/>    <Button        android:text="缩小"        android:id="@+id/button_scale_reduce"        android:layout_width="wrap_content"        android:layout_height="wrap_content"/>    <Button        android:text="放大"        android:id="@+id/button_scale_increase"        android:layout_width="wrap_content"        android:layout_height="wrap_content"/>    <Button        android:text="效果和在一起"        android:id="@+id/button_collect"        android:layout_width="wrap_content"        android:layout_height="wrap_content"/>    <ImageView        android:id="@+id/imageview"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@mipmap/zhaoliying"        android:layout_gravity="center"/></LinearLayout>