Android View Animation 视图动画

在Android3.0之前，Android动画效果分为Tween Animation补间动画和Frame Animation逐帧动画（也有人称Drawable Animation），统称为视图动画。

透明动画效果AlphaAnimation

界面配置就是在点击按钮时触发效果，点击内的代码如下：

                AlphaAnimation animation = new AlphaAnimation(0,1);
                animation.setDuration(1000);
                v.startAnimation(animation);

           

也可以使用xml文件来配置动画效果，在res目录下创建anim文件夹，在其中配置anim.xml文件：

<?xml version="1.0" encoding="utf-8"?>
<alpha xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromAlpha="0"
    android:toAlpha="1"
    android:duration="1000">
</alpha>

然后在代码中

v.startAnimation(AnimationUtils.loadAnimation(MainActivity.this,R.anim.anim));

旋转动画RotateAnimation

代码实现：

//                RotateAnimation animation = new RotateAnimation(0,360);//原点旋转
//                RotateAnimation animation = new RotateAnimation(0,360,100,50);//指定点旋转
                RotateAnimation animation = new RotateAnimation(0,360, Animation.RELATIVE_TO_SELF,0.5f,Animation.RELATIVE_TO_SELF,0.5f);//自身中心点旋转
                animation.setDuration(1000);
                v.startAnimation(animation);

   

xml实现：

<?xml version="1.0" encoding="utf-8"?>
<rotate xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromDegrees="0"
    android:toDegrees="360"
    android:duration="1000"
    android:pivotX="50%"
    android:pivotY="50%">

</rotate>

位移动画TranslateAnimation

代码：

 TranslateAnimation animation = new TranslateAnimation(0, 200, 0, 200);//目标点相对于自身的增量
 animation.setDuration(1000);
 v.startAnimation(animation);

xml：

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

</translate>

缩放动画ScaleAnimation

代码：

//              ScaleAnimation  animation = new ScaleAnimation(0,1,0,1);
//              ScaleAnimation animation = new ScaleAnimation(0,1,0,1,100,50);
                ScaleAnimation animation = new ScaleAnimation(0, 1, 0, 1, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
                animation.setDuration(1000);
                v.startAnimation(animation);

xml：

<?xml version="1.0" encoding="utf-8"?>
<scale xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromXScale="0"
    android:toXScale="1"
    android:fromYScale="0"
    android:toYScale="1"
    android:duration="1000"
    android:pivotX="50%"
    android:pivotY="50%">

</scale>

动画效果混合

代码：

        AnimationSet animationSet = new AnimationSet(true);
        animationSet.setDuration(1000);

        AlphaAnimation alphaAnimation = new AlphaAnimation(0,1);
        alphaAnimation.setDuration(1000);
        animationSet.addAnimation(alphaAnimation);

        TranslateAnimation translateAnimation = new TranslateAnimation(0,200,0,200);
        translateAnimation.setDuration(1000);
        animationSet.addAnimation(translateAnimation);
        v.startAnimation(animationSet);

xml：

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="true"
    android:duration="1000">

    <alpha android:fromAlpha="0" android:toAlpha="1"/>

    <translate   android:fromXDelta="0" android:toXDelta="200"
    android:fromYDelta="0" android:toYDelta="200"/>

</set>

如果想要对动画事件进行监听，只需让动画对象实现AnimationListener接口即可：

animation.setAnimationListener(new Animation.AnimationListener() {
                    @Override
                    public void onAnimationStart(Animation animation) {

                    }

                    @Override
                    public void onAnimationEnd(Animation animation) {
                        Toast.makeText(MainActivity.this,"Animation end",Toast.LENGTH_SHORT).show();
                    }

                    @Override
                    public void onAnimationRepeat(Animation animation) {

                    }
                });

自定义动画效果

我们可以通过继承Animation来自定义一个动画效果：

代码实现：

import android.view.animation.Animation;
import android.view.animation.Transformation;

 
public class CustomAnim extends Animation {

    @Override
    public void initialize(int width, int height, int parentWidth, int parentHeight) {
//        System.out.println(">>>>>>>>>>>>");
        super.initialize(width, height, parentWidth, parentHeight);
    }

    @Override
    protected void applyTransformation(float interpolatedTime, Transformation t) {
//        System.out.println(interpolatedTime);
//        t.setAlpha(interpolatedTime);
//        t.getMatrix().setTranslate(200*interpolatedTime,200*interpolatedTime);
        t.getMatrix().setTranslate((float) (Math.sin(interpolatedTime*20)*50),0);//20周期   越大越快  50 振幅  越大越宽
        super.applyTransformation(interpolatedTime, t);
    }
}

使用：

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends AppCompatActivity {

    private CustomAnim customAnim;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        customAnim = new CustomAnim();
        customAnim.setDuration(1000);

        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                v.startAnimation(customAnim);

            }
        });
    }
}

视图动画除了用在控件上在布局上也可以使用，如下图的效果：

实现代码如下：

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.animation.LayoutAnimationController;
import android.view.animation.ScaleAnimation;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        LinearLayout view = (LinearLayout) View.inflate(this, R.layout.activity_main, null);
        setContentView(view);

        ScaleAnimation sa = new ScaleAnimation(0,1,0,1);
        sa.setDuration(2000);

        LayoutAnimationController lac = new LayoutAnimationController(sa,0.5f);//0.5f 延迟  一个一个出来
        lac.setOrder(LayoutAnimationController.ORDER_REVERSE);//出来的顺序

        view.setLayoutAnimation(lac);

    }
}

在布局内容改变时官方也为我们设置了一个简单的动画效果，只需在页面布局中添加

android:animateLayoutChanges="true"

布局动画也可以使用在ListView中：

代码：

public class MainActivity extends ListActivity {

    private ArrayAdapter<String> adapter;
    private LayoutAnimationController lac;
    private ScaleAnimation sa;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,new String[]{"Hello","World","Android"});
        setListAdapter(adapter);

        sa = new ScaleAnimation(0,1,0,1);
        sa.setDuration(1000);
        lac = new LayoutAnimationController(sa,0.5f);

        getListView().setLayoutAnimation(lac);
    }
}

该效果也可以使用xml文件实现：

先创建单个动画scale.xml：

<?xml version="1.0" encoding="utf-8"?>
<scale xmlns:android="http://schemas.android.com/apk/res/android"
    android:fromXScale="0"
    android:toXScale="1"
    android:fromYScale="0"
    android:toYScale="1"
    android:duration="1000">

</scale>

再创建layoutAnimation文件list_anim.xml：

<?xml version="1.0" encoding="utf-8"?>
<layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android"
    android:animation="@anim/scale"
    android:delay="0.5">

</layoutAnimation>

使用时直接放在布局文件中：

<ListView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:id="@android:id/list"
        android:layoutAnimation="@anim/list_anim"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

视图动画应用---2D翻转

代码如下：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ImageView
        android:id="@+id/ivA"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:adjustViewBounds="true"
        android:src="@drawable/image_a" />

    <ImageView
        android:id="@+id/ivB"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:adjustViewBounds="true"
        android:src="@drawable/image_b" />

</FrameLayout>

 

package com.jikexueyuan.card2d;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.ScaleAnimation;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {

    private ImageView imageA, imageB;
    private ScaleAnimation sato0 = new ScaleAnimation(1, 0, 1, 1, Animation.RELATIVE_TO_PARENT, 0.5f, Animation.RELATIVE_TO_PARENT, 0.5f);
    private ScaleAnimation sato1 = new ScaleAnimation(0, 1, 1, 1, Animation.RELATIVE_TO_PARENT, 0.5f, Animation.RELATIVE_TO_PARENT, 0.5f);


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initView();

        findViewById(R.id.root).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (imageA.getVisibility() == View.VISIBLE){
                    imageA.startAnimation(sato0);
                } else {
                    imageB.startAnimation(sato0 );
                }
            }
        });
    }

    private void showImageA() {
        imageA.setVisibility(View.VISIBLE);
        imageB.setVisibility(View.INVISIBLE);
    }

    private void showImageB() {
        imageA.setVisibility(View.INVISIBLE);
        imageB.setVisibility(View.VISIBLE);
    }

    private void initView() {
        imageA = (ImageView) findViewById(R.id.ivA);
        imageB = (ImageView) findViewById(R.id.ivB);
        showImageA();
        sato0.setDuration(500);
        sato1.setDuration(500);

        sato0.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationStart(Animation animation) {

            }

            @Override
            public void onAnimationEnd(Animation animation) {
                if (imageA.getVisibility() == View.VISIBLE){
                    imageA.setAnimation(null);
                    showImageB();
                    imageB.startAnimation(sato1);
                } else {
                    imageB.setAnimation(null);
                    showImageA();
                    imageA.startAnimation(sato1);
                }
            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }
        });
    }
}