Android自定义View实现广告信息上下滚动效果

先看看效果：

实现代码：

public class scrollbanner extends linearlayout {

  private textview mbannertv1;
  private textview mbannertv2;
  private handler handler;
  private boolean isshow;
  private int starty1, endy1, starty2, endy2;
  private runnable runnable;
  private list<string> list;
  private int position = 0;
  private int offsety = 100;


  public scrollbanner(context context) {
    this(context, null);
  }

  public scrollbanner(context context, attributeset attrs) {
    this(context, attrs, 0);
  }

  public scrollbanner(context context, attributeset attrs, int defstyleattr) {
    super(context, attrs, defstyleattr);
    view view = layoutinflater.from(context).inflate(r.layout.view_scroll_banner, this);
    mbannertv1 = (textview) view.findviewbyid(r.id.tv_banner1);
    mbannertv2 = (textview) view.findviewbyid(r.id.tv_banner2);

    handler = new handler();

    runnable = new runnable() {
      @override
      public void run() {
        isshow = !isshow;

        if (position == list.size())
          position = 0;

        if (isshow) {
          mbannertv1.settext(list.get(position++));
        } else {
          mbannertv2.settext(list.get(position++));
        }

        starty1 = isshow ? 0 : offsety;
        endy1 = isshow ? -offsety : 0;


        objectanimator.offloat(mbannertv1, "translationy", starty1, endy1).setduration(300).start();

        starty2 = isshow ? offsety : 0;
        endy2 = isshow ? 0 : -offsety;
        objectanimator.offloat(mbannertv2, "translationy", starty2, endy2).setduration(300).start();

        handler.postdelayed(runnable, 3000);
      }
    };

  }


  public list<string> getlist() {
    return list;
  }

  public void setlist(list<string> list) {
    this.list = list;
  }

  public void startscroll() {
    handler.post(runnable);
  }

  public void stopscroll() {
    handler.removecallbacks(runnable);
  }
}

view_scroll_banner.xml：

<?xml version="1.0" encoding="utf-8"?>
<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="horizontal"
  android:padding="10dp">

  <textview
    android:id="@+id/tv_title"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centervertical="true"
    android:text="公告"
    android:textcolor="#e76712"
    android:textsize="16sp" />

  <view
    android:id="@+id/view_divider"
    android:layout_width="1dp"
    android:layout_height="match_parent"
    android:layout_marginleft="10dp"
    android:layout_marginright="10dp"
    android:layout_torightof="@id/tv_title"
    android:background="#dddddd" />

  <textview
    android:id="@+id/tv_banner1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_centervertical="true"
    android:layout_torightof="@+id/view_divider"
    android:ellipsize="end"
    android:singleline="true"
    android:text="热烈欢迎领导光临" />

  <textview
    android:id="@+id/tv_banner2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_centervertical="true"
    android:layout_torightof="@+id/view_divider"
    android:ellipsize="end"
    android:singleline="true"
    android:text="喜庆国庆欢乐大酬宾" />
</relativelayout>

使用方法：

scrollbanner.setlist(list);
scrollbanner.startscroll();

以上就是本文的全部内容，希望对大家学习android软件编程有所帮助，也希望大家多多支持。