Android自定义View--垂直ViewPager加跑马灯

背景
不多说，直接看此图。

关键技术
ViewPager有个setPageTransformer方法可以设置页面切换时的动画:

public void setPageTransformer(boolean reverseDrawingOrder, PageTransformer transformer)

/** * 自定义Pager切换模式 */class DefaultTransformer implements ViewPager.PageTransformer {    @Override    public void transformPage(View view, float position) {        float alpha = 0;        if (0 <= position && position <= 1) {            alpha = 1 - position;        } else if (-1 < position && position < 0) {            alpha = position + 1;        }        view.setAlpha(alpha);        view.setTranslationX(view.getWidth() * -position);        float yPosition = position * view.getHeight();        view.setTranslationY(yPosition);    }}

跑马灯TextView:

public class MarqueeText extends TextView {    public MarqueeText(Context context, AttributeSet attrs) {        super(context, attrs);    }    @Override    protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {        super.onFocusChanged(focused, direction, previouslyFocusedRect);    }    @Override    public void onWindowFocusChanged(boolean hasWindowFocus) {        if(hasWindowFocus) super.onWindowFocusChanged(hasWindowFocus);    }    @Override    @ViewDebug.ExportedProperty(category = "focus")    public boolean isFocused() {        return true;    }}

代码地址在GitHub：地址