我正在开发一个应用程序,在我的主页上,我需要给徽标(imageview)提供发光和褪色效果动画我尝试了很多,但是找不到如何给出发光效果动画,我知道onclick事件的发光效果请帮我解决这个问题
提前致谢
提前致谢
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;
}
}
这段代码是我希望动画的触摸事件
解决方法
对于发光效果检查
Glow effect和
对于闪烁类型的动画使用它,你必须改变Reapeatcount和持续时间根据您的要求
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);
使用后如下所示
imageview.startAnimation(blinkanimation); or imageview.setAnimation(blinkanimation);
