Android动画设置

最近学习了下动画，大致分为：属性动画（继承值动画），帧动画，补间动画。下面介绍下每一种的XML文件配置

首先：普通动画：

分为translate，scale，alpha，rotate，四种动画配置大题相同；

<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:duration="1000"
    android:fromXDelta="0"
    android:interpolator="@anim/cycle_7"
    android:toXDelta="10" />

解释下interpolator这个属性，这个可以设置动画结束时候的一些结束动画，例如来回振动次数cycle，还有overshoot等。

<cycleInterpolator xmlns:android="http://schemas.android.com/apk/res/android"
    android:cycles="7" />

这个属性说明，来回振动7次。其他三种动画的配置也相同，如果想设置多种动画的合集，XML文件外可以包裹一层Set属性。

在代码中同样可以设置补间动画。

public void translate(View v){
//		ta = new TranslateAnimation(10, 100, 20, 200);
		ta = new TranslateAnimation(Animation.RELATIVE_TO_SELF, -1, Animation.RELATIVE_TO_SELF, 2,
				Animation.RELATIVE_TO_SELF, -0.5f, Animation.RELATIVE_TO_SELF, 1.5f);
		//设置播放时间
		ta.setDuration(2000);
		//设置重复次数
		ta.setRepeatCount(1);
		ta.setRepeatMode(Animation.REVERSE);
		iv.startAnimation(ta);
	}

	public void scale(View v){
//		sa = new ScaleAnimation(fromX, toX, fromY, toY, iv.getWidth() / 2, iv.getHeight() / 2);
		sa = new ScaleAnimation(0.5f, 2, 0.1f, 3, Animation.RELATIVE_TO_SELF, 0.5f,
													Animation.RELATIVE_TO_SELF, 0.5f);
		sa.setDuration(2000);
		//填充动画的结束位置
		sa.setRepeatCount(1);
		sa.setRepeatMode(Animation.REVERSE);
		sa.setFillAfter(true);
		iv.startAnimation(sa);
	}

	public void alpha(View v){
		aa = new AlphaAnimation(0, 1);
		aa.setDuration(2000);
		sa.setRepeatCount(1);
		iv.startAnimation(aa);
	}

	public void rotate(View v){
		ra = new RotateAnimation(0, 720, Animation.RELATIVE_TO_SELF, 0.5f,
										Animation.RELATIVE_TO_SELF, 0.5f);
		ra.setDuration(2000);
		ra.setRepeatCount(1);
		ra.setRepeatMode(Animation.REVERSE);
		iv.startAnimation(ra);
	}

	public void fly(View v){
		AnimationSet set = new AnimationSet(false);
		set.addAnimation(ta);
		set.addAnimation(sa);
		set.addAnimation(ra);
		set.addAnimation(aa);

		iv.startAnimation(set);
	}

然后是帧动画，一般这种动画出现次数比较少，相对在app的开场动画中会使用。

<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
    android:oneshot="false">
    <item android:drawable="@drawable/g1" android:duration="200" />
    <item android:drawable="@drawable/g2" android:duration="200" />
    <item android:drawable="@drawable/g3" android:duration="200" />
    <item android:drawable="@drawable/g4" android:duration="200" />
    <item android:drawable="@drawable/g5" android:duration="200" />
    <item android:drawable="@drawable/g6" android:duration="300" />
    <item android:drawable="@drawable/g7" android:duration="300" />
    <item android:drawable="@drawable/g8" android:duration="300" />
    <item android:drawable="@drawable/g9" android:duration="200" />
    <item android:drawable="@drawable/g10" android:duration="200" />
    <item android:drawable="@drawable/g11" android:duration="200" />
</animation-list>

oneshot：动画是否只执行一次，duration：动画的持续时间。

//把帧动画的资源文件指定为iv的背景
		iv.setBackgroundResource(R.drawable.frameanimation);
		//获取iv的背景
		AnimationDrawable ad = (AnimationDrawable) iv.getBackground();
		ad.start();

在类中调用帧动画。

下面介绍下属性动画：这种动画与帧动画的区别在于，他是真实的去移动位移。

public void translate(View v){
//		TranslateAnimation ta = new TranslateAnimation(0, 150, 0, 0);
//		ta.setDuration(2000);
//		ta.setFillAfter(true);
//		iv.startAnimation(ta);

		//target:动画作用于哪个组件
		ObjectAnimator oa = ObjectAnimator.ofFloat(iv, "translationX", 10, 70, 20, 100);
		oa.setDuration(2000);
		oa.setRepeatCount(1);
		oa.setRepeatMode(ValueAnimator.REVERSE);
		oa.start();
	}

	public void scale(View v){
		ObjectAnimator oa = ObjectAnimator.ofFloat(iv, "scaleX", 1, 1.6f, 1.2f, 2);
		oa.setDuration(2000);
		oa.start();
	}

	public void alpha(View v){
		ObjectAnimator oa = ObjectAnimator.ofFloat(iv, "alpha", 0, 0.6f, 0.2f, 1);
		oa.setDuration(2000);
		oa.start();
	}

	public void rotate(View v){
		ObjectAnimator oa = ObjectAnimator.ofFloat(iv, "rotationY", 0, 180, 90, 360);
		oa.setDuration(2000);
		oa.setRepeatCount(1);
		oa.setRepeatMode(ValueAnimator.REVERSE);
		oa.start();
	}

	public void fly(View v){
		AnimatorSet set = new AnimatorSet();

		ObjectAnimator oa1 = ObjectAnimator.ofFloat(iv, "translationX", 10, 70, 20, 100);
		oa1.setDuration(2000);
		oa1.setRepeatCount(1);
		oa1.setRepeatMode(ValueAnimator.REVERSE);

		ObjectAnimator oa2 = ObjectAnimator.ofFloat(iv, "translationY", 10, 70, 20, 100);
		oa2.setDuration(2000);
		oa2.setRepeatCount(1);
		oa2.setRepeatMode(ValueAnimator.REVERSE);

		ObjectAnimator oa3 = ObjectAnimator.ofFloat(iv, "scaleX", 1, 1.6f, 1.2f, 2);
		oa3.setDuration(2000);
		oa3.setRepeatCount(1);
		oa3.setRepeatMode(ValueAnimator.REVERSE);

		ObjectAnimator oa4 = ObjectAnimator.ofFloat(iv, "rotation", 0, 180, 90, 360);
		oa4.setDuration(2000);
		oa4.setRepeatCount(1);
		oa4.setRepeatMode(ValueAnimator.REVERSE);

		//设置挨个飞
//		set.playSequentially(oa1, oa2, oa3, oa4);
		//设置一起飞
		set.playTogether(oa1, oa2, oa3, oa4);
		set.start();
	}

	public void xml(View v){
		Animator at = AnimatorInflater.loadAnimator(this, R.animator.objanimator);
		//设置作用于哪个组件
		at.setTarget(iv);
		at.start();
	}

同样，他也可以加载XML动画。

<set xmlns:android="http://schemas.android.com/apk/res/android" >
	<objectAnimator
	    android:propertyName="translationX"
	    android:duration="200"
	    android:repeatCount="1"
	    android:repeatMode="reverse"
	    android:valueFrom="-100"
	    android:valueTo="100"
	    >

	</objectAnimator>
</set>