当前位置: 萬仟网 > IT编程>移动开发>Android > Android滑动删除数据功能的实现代码

Android滑动删除数据功能的实现代码

2019年07月24日 12:23  | 萬仟网IT编程  | 我要评论

今天学习了新的功能那就是滑动删除数据。先看一下效果

我想这个效果大家都很熟悉吧。是不是在qq上看见过这个效果。俗话说好记性不如赖笔头,为了我的以后,为了跟我一样自学的小伙伴们,我把我的代码粘贴在下面。

activity_lookstaff.xml

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent" >
   <textview
    android:id="@+id/tv_title"
    style="@style/gtextview"
    android:text="全部员工" />
  <com.rjxy.view.deletelistview
    android:id="@+id/id_listview"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" 
    android:layout_below="@+id/tv_title">
  </com.rjxy.view.deletelistview>
</relativelayout>

delete_btn.xml

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:orientation="vertical" >
   <button 
    android:id="@+id/id_item_btn"
    android:layout_width="60dp"
    android:singleline="true"
    android:layout_height="wrap_content"
    android:text="删除"
     android:background="@drawable/d_delete_btn"
     android:textcolor="#ffffff"
     android:paddingleft="15dp"
     android:paddingright="15dp"
     android:layout_alignparentright="true"
     android:layout_centervertical="true"
     android:layout_marginright="15dp"
    />
</linearlayout>

d_delete_btn.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:drawable="@drawable/btn_style_five_focused" android:state_focused="true"></item>
  <item android:drawable="@drawable/btn_style_five_pressed" android:state_pressed="true"></item>
  <item android:drawable="@drawable/btn_style_five_normal"></item>
</selector>

deletelistview .java

package com.rjxy.view;
import com.rjxy.activity.r;
import android.content.context;
import android.util.attributeset;
import android.view.gravity;
import android.view.layoutinflater;
import android.view.motionevent;
import android.view.view;
import android.view.viewconfiguration;
import android.widget.button;
import android.widget.linearlayout;
import android.widget.listview;
import android.widget.popupwindow;
public class deletelistview extends listview
{
  private static final string tag = "deletelistview";
  /**
   * 用户滑动的最小距离
   */
  private int touchslop;
  /**
   * 是否响应滑动
   */
  private boolean issliding;
  /**
   * 手指按下时的x坐标
   */
  private int xdown;
  /**
   * 手指按下时的y坐标
   */
  private int ydown;
  /**
   * 手指移动时的x坐标
   */
  private int xmove;
  /**
   * 手指移动时的y坐标
   */
  private int ymove;
  private layoutinflater minflater;
  private popupwindow mpopupwindow;
  private int mpopupwindowheight;
  private int mpopupwindowwidth;
  private button mdelbtn;
  /**
   * 为删除按钮提供一个回调接口
   */
  private delbuttonclicklistener mlistener;
  /**
   * 当前手指触摸的view
   */
  private view mcurrentview;
  /**
   * 当前手指触摸的位置
   */
  private int mcurrentviewpos;
  /**
   * 必要的一些初始化
   * 
   * @param context
   * @param attrs
   */
  public deletelistview(context context, attributeset attrs)
  {
    super(context, attrs);
    minflater = layoutinflater.from(context);
    touchslop = viewconfiguration.get(context).getscaledtouchslop();
    view view = minflater.inflate(r.layout.delete_btn, null);
    mdelbtn = (button) view.findviewbyid(r.id.id_item_btn);
    mpopupwindow = new popupwindow(view, linearlayout.layoutparams.wrap_content,
        linearlayout.layoutparams.wrap_content);
    /**
     * 先调用下measure,否则拿不到宽和高
     */
    mpopupwindow.getcontentview().measure(0, 0);
    mpopupwindowheight = mpopupwindow.getcontentview().getmeasuredheight();
    mpopupwindowwidth = mpopupwindow.getcontentview().getmeasuredwidth();
  }
  @override
  public boolean dispatchtouchevent(motionevent ev)
  {
    int action = ev.getaction();
    int x = (int) ev.getx();
    int y = (int) ev.gety();
    switch (action)
    {
    case motionevent.action_down:
      xdown = x;
      ydown = y;
      /**
       * 如果当前popupwindow显示,则直接隐藏,然后屏蔽listview的touch事件的下传
       */
      if (mpopupwindow.isshowing())
      {
        dismisspopwindow();
        return false;
      }
      // 获得当前手指按下时的item的位置
      mcurrentviewpos = pointtoposition(xdown, ydown);
      // 获得当前手指按下时的item
      view view = getchildat(mcurrentviewpos - getfirstvisibleposition());
      mcurrentview = view;
      break;
    case motionevent.action_move:
      xmove = x;
      ymove = y;
      int dx = xmove - xdown;
      int dy = ymove - ydown;
      /**
       * 判断是否是从右到左的滑动
       */
      if (xmove < xdown && math.abs(dx) > touchslop && math.abs(dy) < touchslop)
      {
        // log.e(tag, "touchslop = " + touchslop + " , dx = " + dx +
        // " , dy = " + dy);
        issliding = true;
      }
      break;
    }
    return super.dispatchtouchevent(ev);
  }
  @override
  public boolean ontouchevent(motionevent ev)
  {
    int action = ev.getaction();
    /**
     * 如果是从右到左的滑动才相应
     */
    if (issliding)
    {
      switch (action)
      {
      case motionevent.action_move:
        int[] location = new int[2];
        // 获得当前item的位置x与y
        mcurrentview.getlocationonscreen(location);
        // 设置popupwindow的动画
        mpopupwindow.setanimationstyle(r.style.popwindow_delete_btn_anim_style);
        mpopupwindow.update();
        mpopupwindow.showatlocation(mcurrentview, gravity.left | gravity.top,
            location[0] + mcurrentview.getwidth(), location[1] + mcurrentview.getheight() / 2
                - mpopupwindowheight / 2);
        // 设置删除按钮的回调
        mdelbtn.setonclicklistener(new onclicklistener()
        {
          @override
          public void onclick(view v)
          {
            if (mlistener != null)
            {
              mlistener.clickhappend(mcurrentviewpos);
              mpopupwindow.dismiss();
            }
          }
        });
        // log.e(tag, "mpopupwindow.getheight()=" + mpopupwindowheight);
        break;
      case motionevent.action_up:
        issliding = false;
      }
      // 相应滑动期间屏幕itemclick事件,避免发生冲突
      return true;
    }
    return super.ontouchevent(ev);
  }
  /**
   * 隐藏popupwindow
   */
  private void dismisspopwindow()
  {
    if (mpopupwindow != null && mpopupwindow.isshowing())
    {
      mpopupwindow.dismiss();
    }
  }
  public void setdelbuttonclicklistener(delbuttonclicklistener listener)
  {
    mlistener = listener;
  }
  public interface delbuttonclicklistener
  {
    public void clickhappend(int position);
  }
}

deletestaffactivity .java

package com.rjxy.activity;
import java.io.ioexception;
import java.io.inputstream;
import java.net.httpurlconnection;
import java.net.url;
import java.util.arraylist;
import java.util.list;
import org.json.jsonarray;
import org.json.jsonexception;
import org.json.jsonobject;
import com.rjxy.bean.staff;
import com.rjxy.path.path;
import com.rjxy.util.streamtools;
import com.rjxy.view.deletelistview;
import com.rjxy.view.deletelistview.delbuttonclicklistener;
import android.app.activity;
import android.os.bundle;
import android.os.handler;
import android.os.message;
import android.view.view;
import android.view.window;
import android.widget.adapterview;
import android.widget.adapterview.onitemclicklistener;
import android.widget.arrayadapter;
import android.widget.toast;
public class deletestaffactivity extends activity {
  private static final int change_ui = 1;
  private static final int delete = 3;
  private static final int success = 2;
  private static final int error = 0;
  private deletelistview lv;
  private arrayadapter<string> madapter;
  private list<string> staffs = new arraylist<string>();
  private staff staff;
  string sno;
  // 主线程创建消息处理器
  private handler handler = new handler() {
    public void handlemessage(android.os.message msg) {
      if (msg.what == change_ui) {
        try {
          jsonarray arr = new jsonarray((string) msg.obj);
          for (int i = 0; i < arr.length(); i++) {
            jsonobject temp = (jsonobject) arr.get(i);
            staff = new staff();
            staff.setsno(temp.getstring("sno"));
            staff.setsname(temp.getstring("sname"));
            staff.setdname(temp.getstring("d_name"));
            staffs.add("员工号:" + staff.getsno() + "\n姓  名:"
                + staff.getsname() + "\n部  门:" + staff.getdname());
          }
          madapter = new arrayadapter<string>(
              deletestaffactivity.this,
              android.r.layout.simple_list_item_1, staffs);
          lv.setadapter(madapter);
          lv.setdelbuttonclicklistener(new delbuttonclicklistener() {
            @override
            public void clickhappend(final int position) {
              string s = madapter.getitem(position);
              string[] ss = s.split("\n");
              string snos = ss[0];
              string[] sss = snos.split(":");
              sno = sss[1];
              delete();
              madapter.remove(madapter.getitem(position));
            }
          });
          lv.setonitemclicklistener(new onitemclicklistener() {
            @override
            public void onitemclick(adapterview<?> parent,
                view view, int position, long id) {
              toast.maketext(
                  deletestaffactivity.this,
                  position + " : "
                      + madapter.getitem(position), 0)
                  .show();
            }
          });
        } catch (jsonexception e) {
          e.printstacktrace();
        }
      } else if (msg.what == delete) {
        toast.maketext(deletestaffactivity.this, (string) msg.obj, 1)
            .show();
      }
    };
  };
  @override
  protected void oncreate(bundle savedinstancestate) {
    requestwindowfeature(window.feature_no_title);
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_lookstaff);
    lv = (deletelistview) findviewbyid(r.id.id_listview);
    select();
  }
  private void select() {
    // 子线程更新ui
    new thread() {
      public void run() {
        try {
          // 区别1、url的路径不同
          url url = new url(path.lookstaffpath);
          httpurlconnection conn = (httpurlconnection) url
              .openconnection();
          // 区别2、请求方式post
          conn.setrequestmethod("post");
          conn.setrequestproperty("user-agent",
              "mozilla/5.0(compatible;msie 9.0;windows nt 6.1;trident/5.0)");
          // 区别3、必须指定两个请求的参数
          conn.setrequestproperty("content-type",
              "application/x-www-form-urlencoded");// 请求的类型 表单数据
          string data = "";
          conn.setrequestproperty("content-length", data.length()
              + "");// 数据的长度
          // 区别4、记得设置把数据写给服务器
          conn.setdooutput(true);// 设置向服务器写数据
          byte[] bytes = data.getbytes();
          conn.getoutputstream().write(bytes);// 把数据以流的方式写给服务器
          int code = conn.getresponsecode();
          system.out.println(code);
          if (code == 200) {
            inputstream is = conn.getinputstream();
            string result = streamtools.readstream(is);
            message mas = message.obtain();
            mas.what = change_ui;
            mas.obj = result;
            handler.sendmessage(mas);
          } else {
            message mas = message.obtain();
            mas.what = error;
            handler.sendmessage(mas);
          }
        } catch (ioexception e) {
          // todo auto-generated catch block
          message mas = message.obtain();
          mas.what = error;
          handler.sendmessage(mas);
        }
      }
    }.start();
  }
  private void delete() {
    // 子线程更新ui
    new thread() {
      public void run() {
        try {
          // 区别1、url的路径不同
          url url = new url(path.deletestaffpath);
          httpurlconnection conn = (httpurlconnection) url
              .openconnection();
          // 区别2、请求方式post
          conn.setrequestmethod("post");
          conn.setrequestproperty("user-agent",
              "mozilla/5.0(compatible;msie 9.0;windows nt 6.1;trident/5.0)");
          // 区别3、必须指定两个请求的参数
          conn.setrequestproperty("content-type",
              "application/x-www-form-urlencoded");// 请求的类型 表单数据
          string data = "sno=" + sno;
          conn.setrequestproperty("content-length", data.length()
              + "");// 数据的长度
          // 区别4、记得设置把数据写给服务器
          conn.setdooutput(true);// 设置向服务器写数据
          byte[] bytes = data.getbytes();
          conn.getoutputstream().write(bytes);// 把数据以流的方式写给服务器
          int code = conn.getresponsecode();
          system.out.println(code);
          if (code == 200) {
            inputstream is = conn.getinputstream();
            string result = streamtools.readstream(is);
            message mas = message.obtain();
            mas.what = delete;
            mas.obj = result;
            handler.sendmessage(mas);
          } else {
            message mas = message.obtain();
            mas.what = error;
            handler.sendmessage(mas);
          }
        } catch (ioexception e) {
          // todo auto-generated catch block
          message mas = message.obtain();
          mas.what = error;
          handler.sendmessage(mas);
        }
      }
    }.start();
  }
}

以上所述是小编给大家介绍的android滑动删除数据功能的实现代码,希望对大家有所帮助

如对本文有疑问,请在下面进行留言讨论,广大热心网友会与你互动!! 点击进行留言回复

相关文章:

◎已有 0 人评论

Copyright © 2019  萬仟网 保留所有权利. 粤ICP备17035492号-1
站长QQ:2386932994 | 联系邮箱:2386932994@qq.com