Android基于widget组件实现物体移动/控件拖动功能示例

本文实例讲述了android基于widget组件实现物体移动/控件拖动功能。分享给大家供大家参考，具体如下：

package com.sky;
import android.app.activity;
import android.os.bundle;
import android.view.keyevent;
import android.view.motionevent;
import android.view.view;
import android.view.view.onclicklistener;
import android.widget.absolutelayout;
import android.widget.button;
@suppresswarnings("deprecation")
public class abosolutemove extends activity implements onclicklistener
{
 /** called when the activity is first created. */
 public button button1;
 public button button2;
 public button button3;
 public button button4;
 button tmp;//临时保存，选择的button
 int x;
 int y;
 int flag;//用于标志选择哪个button
  @override
  public void oncreate(bundle savedinstancestate)
  {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.main);
    button1=(button) findviewbyid(r.id.widget27);
    button2=(button) findviewbyid(r.id.widget28);
    button3=(button) findviewbyid(r.id.widget29);
    button4=(button) findviewbyid(r.id.widget30);
    button1.setonclicklistener(this);
    button2.setonclicklistener(this);
    button3.setonclicklistener(this);
    button4.setonclicklistener(this);
  }
 @override
 public void onclick(view v)
 {
 // todo auto-generated method stub
 switch(v.getid())
 {
  case r.id.widget27:
  flag=r.id.widget27;
  settitle("button1");
  break;
  case r.id.widget28:
  flag=r.id.widget28;
  settitle("button2");
  break;
  case r.id.widget29:
  flag=r.id.widget29;
  settitle("button3");
  break;
  case r.id.widget30:
  flag=r.id.widget30;
  settitle("button4");
  break;
 }
 }
 @override
 public boolean onkeydown(int keycode, keyevent event)
 {
 // todo auto-generated method stub
 return super.onkeydown(keycode, event);
 }
 @override
 public boolean ontouchevent(motionevent event)
 {
 // todo auto-generated method stub
 x = (int) event.getx();
    y = (int) event.gety();
    tmp=(button) findviewbyid(flag);//获取所选中的button
    absolutelayout.layoutparams params1=new absolutelayout.layoutparams(50,50,x-25,y-50);
    tmp.setlayoutparams(params1);//设置button的新位置
    switch(event.getaction())
    {
      case motionevent.action_down:
       tmp.invalidate();
       tmp.settext("选中down");
        break;
      case motionevent.action_up:
       tmp.invalidate();
       tmp.settext("选中up");
        break;
      case motionevent.action_move:
       tmp.invalidate();
       tmp.settext("选中move");
        break;
    }
    return super.ontouchevent(event);
 }
}

更多关于android相关内容感兴趣的读者可查看本站专题：《android基本组件用法总结》、《android开发入门与进阶教程》、《android资源操作技巧汇总》、《android视图view技巧总结》及《android控件用法总结》

希望本文所述对大家android程序设计有所帮助。