Question

我正在开发一个应用程序，在我的主页中，我需要给徽标（imageview）提供发光和褪色效果动画我尝试了很多，无法找到如何给出发光效果动画，我知道发光效果为onclick事件请帮我解决这个问题提前致谢

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;
}
}

此代码适用于我想要动画的触摸事件

Answer 1

对于发光效果检查Glow effect和

对于blink类型的动画使用此功能，您必须根据需要更改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);

使用后如下所示

imageview.startAnimation(blinkanimation);  or imageview.setAnimation(blinkanimation);

Answer 2

简单

制作2组图像，一组是浅色，另一组是晴天（明亮）

然后您可以使用AlphaAnimation为图像设置动画。

androidview动画发光效果在imageview上

2 个答案: