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我有一个九个补丁图像的按钮。我不想为“按下”状态提供另一个图像(这是StateListDrawable需要的)。我只是希望它在按下时变得“更暗”(就像 iOS 按钮一样)。我怎样才能做到这一点?

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1 回答 1

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使用这样的东西:

public class MyStateDrawable extends LayerDrawable {

    public MyStateDrawable(Drawable[] layers) {
        super(layers);
    }

    @Override
    protected boolean onStateChange(int[] states) {
        for (int state : states) {
            if (state == R.attr.state_activated || state == android.R.attr.state_pressed) {
                super.setColorFilter(0x7f000000, Mode.SRC_ATOP);
                return true;
            } else if(state == -android.R.attr.state_activated || state == -android.R.attr.state_pressed){
                super.setColorFilter(0x00000000, Mode.SRC_ATOP);
                return true;
            }else {
                super.setColorFilter(null);
            }
        }
        return super.onStateChange(states);
    }

    @Override
    public boolean isStateful() {
        return true;
    }
}

进而

StateDrawable state = new MyStateDrawable(new Drawable[]{mDefaultDrawable});
view.setImageDrawable(state);

希望对你有帮助 :)

于 2013-01-14T13:41:11.463 回答