Android编程实现左右滑动切换背景的方法

本文实例讲述了android编程实现左右滑动切换背景的方法。分享给大家供大家参考，具体如下：

最近想做一个左右滑动切换背景图片的应用，特地将自己的研究分享一下：

这个需要继承2个监听接口 ongesturelistener,  ontouchlistener

关于这2个接口大家可以在网上查一下

同时需要设置2个属性

bglayout.setontouchlistener(this);
bglayout.setlongclickable(true);

并且在这个函数中有如下这几句话

public boolean ontouch(view v, motionevent event) {
// todo auto-generated method stub
return this.mgesture.ontouchevent(event);
}

附送代码：

public class switcheractivity extends activity implements ongesturelistener,
    ontouchlistener {
  /** called when the activity is first created. */
  linearlayout bglayout = null;
  private gesturedetector mgesture = null;
  private int flag = 3;
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.main);
    mgesture = new gesturedetector(this);
    bglayout = (linearlayout) findviewbyid(r.id.bg);
    bglayout.setbackgroundresource(r.drawable.bg3);
    bglayout.setontouchlistener(this);
    bglayout.setlongclickable(true);
  }
  public boolean ondown(motionevent e) {
    // todo auto-generated method stub
    return false;
  }
  public boolean onfling(motionevent e1, motionevent e2, float velocityx,
      float velocityy) {
    // 处理左右滑动
    if (e1.getx() - e2.getx() > 100) { // 向左滑动
      if (flag == 3) {
        bglayout.setbackgroundresource(r.drawable.bg4);
        flag = 4;
        return true;
      }
      if (flag == 4) {
        bglayout.setbackgroundresource(r.drawable.bg5);
        flag = 5;
        return true;
      }
      if (flag == 1) {
        bglayout.setbackgroundresource(r.drawable.bg2);
        flag = 2;
        return true;
      }
      if (flag == 2) {
        bglayout.setbackgroundresource(r.drawable.bg3);
        flag = 3;
        return true;
      }
    } else if (e1.getx() - e2.getx() < -100) { // 向右滑动
      if (flag == 3) {
        bglayout.setbackgroundresource(r.drawable.bg2);
        flag = 2;
        return true;
      }
      if (flag == 2) {
        bglayout.setbackgroundresource(r.drawable.bg1);
        flag = 1;
        return true;
      }
      if (flag == 5) {
        bglayout.setbackgroundresource(r.drawable.bg4);
        flag = 4;
        return true;
      }
      if (flag == 4) {
        bglayout.setbackgroundresource(r.drawable.bg3);
        flag = 3;
        return true;
      }
    }
    return false;
  }
  public void onlongpress(motionevent e) {
    // todo auto-generated method stub
  }
  public boolean onscroll(motionevent e1, motionevent e2, float distancex,
      float distancey) {
    // todo auto-generated method stub
    return false;
  }
  public void onshowpress(motionevent e) {
    // todo auto-generated method stub
  }
  public boolean onsingletapup(motionevent e) {
    // todo auto-generated method stub
    return false;
  }
  public boolean ontouch(view v, motionevent event) {
    // todo auto-generated method stub
    return this.mgesture.ontouchevent(event);
  }
}

更多关于android图片与特效相关内容感兴趣的读者可查看本站专题：《android开发动画技巧汇总》和《android图形与图像处理技巧总结》

希望本文所述对大家android程序设计有所帮助。