Question

我有一个按钮，当点击时，我希望通过在两种背景颜色之间来回切换，使按钮显示为 flash 。

This answer使用AlphaAnimation制作一个闪烁按钮：

    final Animation animation = new AlphaAnimation(1, 0); // Change alpha from fully visible to invisible
    animation.setDuration(500); // duration - half a second
    animation.setInterpolator(new LinearInterpolator()); // do not alter animation rate
    animation.setRepeatCount(Animation.INFINITE); // Repeat animation infinitely
    animation.setRepeatMode(Animation.REVERSE); // Reverse animation at the end so the button will fade back in
    final Button btn = (Button) findViewById(R.id.your_btn);
    btn.startAnimation(animation);

但我无法使用背景颜色。

Android Studio将自动完成以下操作：

animation = new Animation() {
    @Override
    public void setBackgroundColor(int bg) {
        super.setBackgroundColor(bg);
    }
};

但我尝试将它应用于按钮（使用bg = Color.parseColor("#ffff9434")），但没有骰子。

提前谢谢。

修改

还尝试了以下方法，但它已被弃用且无效（来自here）

    Button btn = (Button)this.findViewById(R.id.btn1);
    //Let's change background's color from blue to red.
    ColorDrawable[] color = {new ColorDrawable(Color.BLUE), new ColorDrawable(Color.RED)};
    TransitionDrawable trans = new TransitionDrawable(color);
    //This will work also on old devices. The latest API says you have to use setBackground instead.
    btn.setBackgroundDrawable(trans);
    trans.startTransition(5000);

ETID 2

搞定了，见下面的答案

Answer 1

搞定了！感谢this发帖！

final AnimationDrawable drawable = new AnimationDrawable();
final Handler handler = new Handler();

drawable.addFrame(new ColorDrawable(Color.RED), 400);
drawable.addFrame(new ColorDrawable(Color.GREEN), 400);
drawable.setOneShot(false);

btn = (Button) view.findViewById(R.id.flashBtn);

btn.setBackgroundDrawable(drawable);
handler.postDelayed(new Runnable() {
    @Override
    public void run() {
        drawable.start();
    }
    }, 100);

像魅力一样！

Android，用动画设置按钮背景颜色？

1 个答案: