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-patible;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，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！