Android旋转动画

核心方法

public void startAnimation(Animation animation)

执行动画，参数可以是各种动画的对象，Animation的多态，也可以是组合动画，后面会有。

2个参数的构造方法

/** * Constructor to use when building a RotateAnimation from code. * Default pivotX/pivotY point is (0,0). * * @param fromDegrees Rotation offset to apply at the start of the animation. * @param toDegrees Rotation offset to apply at the end of the animation. */public RotateAnimation(float fromDegrees, float toDegrees) {    mFromDegrees = fromDegrees;    mToDegrees = toDegrees;    mPivotX = 0.0f;    mPivotY = 0.0f;}

第一个参数是图片旋转的起始度数
第二个参数是图片旋转结束的度数

用法

RotateAnimation ta = new RotateAnimation(0, 360);// 设置动画播放的时间ta.setDuration(1000);// 开始播放动画iv.startAnimation(ta);

效果

以图片左上角为旋转中心，顺时针旋转360度

4个参数的构造方法

    /**     * Constructor to use when building a RotateAnimation from code     *      * @param fromDegrees Rotation offset to apply at the start of the animation.     * @param toDegrees Rotation offset to apply at the end of the animation.     * @param pivotX The X coordinate of the point about which the object is being rotated, specified as an absolute number where 0 is the left edge.     * @param pivotY The Y coordinate of the point about which the object is being rotated, specified as an absolute number where 0 is the top edge.     */    public RotateAnimation(float fromDegrees, float toDegrees, float pivotX, float pivotY) {        mFromDegrees = fromDegrees;        mToDegrees = toDegrees;        mPivotXType = ABSOLUTE;        mPivotYType = ABSOLUTE;        mPivotXValue = pivotX;        mPivotYValue = pivotY;        initializePivotPoint();    }

头两个参数和上面两个参数的构造方法一样，是开始和结束的角度
后两个参数是设置图片的旋转中心

用法

RotateAnimation ta = new RotateAnimation(0, 360, iv.getWidth() / 2, iv.getHeight() / 2);// 设置动画播放的时间ta.setDuration(1000);// 开始播放动画iv.startAnimation(ta);

效果

以图片中心为旋转中心，顺时针旋转360度

6个参数的构造方法

/*** Constructor to use when building a RotateAnimation from code* * @param fromDegrees Rotation offset to apply at the start of the animation.* @param toDegrees Rotation offset to apply at the end of the animation.* @param pivotXType Specifies how pivotXValue should be interpreted. One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or Animation.RELATIVE_TO_PARENT.* @param pivotXValue The X coordinate of the point about which the object is being rotated, specified as an absolute number where 0 is the left edge. This value can either be an absolute number if pivotXType is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise.* @param pivotYType Specifies how pivotYValue should be interpreted. One of Animation.ABSOLUTE, Animation.RELATIVE_TO_SELF, or Animation.RELATIVE_TO_PARENT.* @param pivotYValue The Y coordinate of the point about which the object is being rotated, specified as an absolute number where 0 is the top edge. This value can either be an absolute number if pivotYType is ABSOLUTE, or a percentage (where 1.0 is 100%) otherwise.*/public RotateAnimation(float fromDegrees, float toDegrees, int pivotXType, float pivotXValue, int pivotYType, float pivotYValue) {   mFromDegrees = fromDegrees;   mToDegrees = toDegrees;   mPivotXValue = pivotXValue;   mPivotXType = pivotXType;   mPivotYValue = pivotYValue;   mPivotYType = pivotYType;   initializePivotPoint();}

比4个参数的构造方法多了第三个和第五个参数，其他用法一样，第三个和四五个参数分别设置第四个和第六个参数的类型，四个参数的构造没有设置，是默认设置了Animation.ABSOLUTE类型

用法

// 创建旋转的动画对象RotateAnimation ta = new RotateAnimation(0, 360, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);// 设置动画播放的时间ta.setDuration(1000);// 开始播放动画iv.startAnimation(ta);

效果

和上面一样，以图片中心为旋转中心，顺时针旋转360度。

设置动画重复播放的次数的方法

/** * Sets how many times the animation should be repeated. If the repeat * count is 0, the animation is never repeated. If the repeat count is * greater than 0 or {@link #INFINITE}, the repeat mode will be taken * into account. The repeat count is 0 by default. * * @param repeatCount the number of times the animation should be repeated * @attr ref android.R.styleable#Animation_repeatCount */public void setRepeatCount(int repeatCount) {    if (repeatCount < 0) {        repeatCount = INFINITE;    }    mRepeatCount = repeatCount;}

使用

sa.setRepeatCount(2);

一直重复

sa.setRepeatCount(Animation.INFINITE);

设置动画重复播放的模式的方法

/** * Defines what this animation should do when it reaches the end. This * setting is applied only when the repeat count is either greater than * 0 or {@link #INFINITE}. Defaults to {@link #RESTART}. * * @param repeatMode {@link #RESTART} or {@link #REVERSE} * @attr ref android.R.styleable#Animation_repeatMode */public void setRepeatMode(int repeatMode) {    mRepeatMode = repeatMode;}

使用

sa.setRepeatMode(ScaleAnimation.REVERSE);

动画的监听

rotateAnimation.setAnimationListener(new AnimationListener() {            @Override            public void onAnimationStart(Animation animation) {                // TODO Auto-generated method stub            }            @Override            public void onAnimationRepeat(Animation animation) {                // TODO Auto-generated method stub            }            @Override            public void onAnimationEnd(Animation animation) {                // TODO Auto-generated method stub            }        });

Android旋转动画

Android旋转动画

核心方法

2个参数的构造方法

4个参数的构造方法

6个参数的构造方法

设置动画重复播放的次数的方法

设置动画重复播放的模式的方法

动画的监听

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