8

我正在开发一个应用程序,在我的主页中,我需要为徽标(imageview)提供发光和褪色效果动画我尝试了很多,但找不到如何提供发光效果动画,我知道 onclick 事件的发光效果请帮我解决这个问题 在此先感谢

public class CustomView extends ImageView{
public CustomView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
}
public CustomView(Context context, AttributeSet attrs) {
    super(context, attrs);
}
public CustomView(Context context) {
    super(context);
}
boolean drawGlow = false;
//this is the pixel coordinates of the screen
float glowX = 0;
float glowY = 0;
//this is the radius of the circle we are drawing
float radius = 20;
//this is the paint object which specifies the color and alpha level 
//of the circle we draw
Paint paint = new Paint();
{
    paint.setAntiAlias(true);
    paint.setColor(Color.WHITE);
    paint.setAlpha(50);
};

@Override
public void draw(Canvas canvas){
    super.draw(canvas);
    if(drawGlow)
        canvas.drawCircle(glowX, glowY, radius, paint);
}
@Override
public boolean onTouchEvent(MotionEvent event){
    if(event.getAction() == MotionEvent.ACTION_DOWN){
        drawGlow = true;
    }else if(event.getAction() == MotionEvent.ACTION_UP)
        drawGlow = false;

    glowX = event.getX();
    glowY = event.getY();
    this.invalidate();
    return true;
}
}

此代码用于触摸事件我想要动画

4

2 回答 2

20

对于 Glow effect 检查Glow effect和 for

对于闪烁类型的动画,使用此方法您必须根据您的要求更改 Reapeatcount 和 Duration

AlphaAnimation  blinkanimation= new AlphaAnimation(1, 0); // Change alpha from fully visible to invisible
blinkanimation.setDuration(300); // duration - half a second
blinkanimation.setInterpolator(new LinearInterpolator()); // do not alter animation rate
blinkanimation.setRepeatCount(3); // Repeat animation infinitely
blinkanimation.setRepeatMode(Animation.REVERSE);

使用后如下

imageview.startAnimation(blinkanimation);  or imageview.setAnimation(blinkanimation);
于 2012-06-21T05:02:57.087 回答
3

这很简单

制作 2 组图像,一组是亮的,另一组是晴天的(亮)

然后,您可以使用 AlphaAnimation 为图像设置动画。

于 2012-06-21T04:47:50.460 回答