Android自定义可编辑、删除的侧滑LisitView

前端技术 2023/09/03 Android

最近由于项目的需要，自定义了一个具有侧滑功能的listview，侧滑后可以点击编辑、删除。好了，大家先看一下效果图，毕竟是看脸的世界。 

好了，我要先讲一下思路，一次编辑很难完善，有什么问题我后来还会补上，欢迎各位大神拍砖：
1、首先先说一下item：item用的LinearLayout布局，删除、编辑分别是写死了宽度的TextView，左边是一个match_parent的RelativeLayout,内容自己随意搞 

2、上下滑动和左右滑动的处理：当用户手指滑动时，可以进行坐标的判断，如果Y轴移动距离大，则listview上下滑动；否则当X轴移动距离达到或者超过一个TextView的宽度时，动态控制item的marginLeft为负的两倍TextView的宽度，从而实现滑动效果 

3、编辑、删除的点击：编辑、删除在adapter中进行监听，然后自己在adapter中再定义一个监听接口，方便用户在使用listview的activity中进行监听 

下面附上item的布局文件：

<?xml version=\"1.0\" encoding=\"utf-8\"?>
<LinearLayout xmlns:android=\"http://schemas.android.com/apk/res/android\"
 android:layout_width=\"match_parent\"
 android:layout_height=\"wrap_content\"
 android:orientation=\"horizontal\" >

 <RelativeLayout
  android:layout_width=\"match_parent\"
  android:layout_height=\"wrap_content\"
  android:background=\"#ffffff\"
  android:orientation=\"horizontal\">

  <RelativeLayout
   android:id=\"@+id/rlTop\"
   android:layout_width=\"match_parent\"
   android:layout_height=\"65dp\"
   android:padding=\"10dp\">
   <ImageView
    android:id=\"@+id/imgLamp\"
    android:layout_alignParentLeft=\"true\"
    android:layout_marginLeft=\"10dp\"
    android:src=\"@mipmap/ic_launcher\"
    android:layout_width=\"40dp\"
    android:layout_height=\"40dp\"/>
   <TextView
    android:id=\"@+id/tvName\"
    android:layout_width=\"wrap_content\"
    android:layout_height=\"22dp\"
    android:layout_toRightOf=\"@+id/imgLamp\"
    android:layout_marginLeft=\"10dp\"
    android:gravity=\"center\"
    android:textSize=\"17sp\"
    android:textColor=\"#000000\" />

   <TextView
    android:id=\"@+id/tvContent\"
    android:layout_width=\"wrap_content\"
    android:layout_height=\"18dp\"
    android:layout_toRightOf=\"@+id/imgLamp\"
    android:layout_below=\"@+id/tvName\"
    android:layout_marginLeft=\"10dp\"
    android:gravity=\"center\"
    android:textSize=\"14sp\"
    android:textColor=\"#000000\"
    android:text=\"content\"/>
  </RelativeLayout>

  <View
   android:layout_width=\"match_parent\"
   android:layout_height=\"1dp\"
   android:layout_marginLeft=\"20dp\"
   android:layout_marginRight=\"20dp\"
   android:layout_below=\"@+id/rlTop\"
   android:background=\"#EEEEEE\"/>

 </RelativeLayout>

 <!--Edit-->
 <TextView
  android:id=\"@+id/tvEdit\"
  android:layout_width=\"80dp\"
  android:layout_height=\"match_parent\"
  android:background=\"#dddddd\"
  android:gravity=\"center\"
  android:paddingLeft=\"20dp\"
  android:layout_marginBottom=\"1dp\"
  android:textColor=\"@android:color/white\"
  android:paddingRight=\"20dp\"
  android:text=\"编辑\" />

 <!--delete-->
 <TextView
  android:id=\"@+id/delete\"
  android:layout_width=\"80dp\"
  android:layout_height=\"match_parent\"
  android:background=\"#FFFF0000\"
  android:gravity=\"center\"
  android:paddingLeft=\"20dp\"
  android:layout_marginBottom=\"1dp\"
  android:textColor=\"@android:color/white\"
  android:paddingRight=\"20dp\"
  android:text=\"删除\" />

</LinearLayout>

Adapter代码： 

package com.lei.slidelistview;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.List;

/**
 * Created by 磊 on 2016/7/7.
 */
public class ListViewSlideAdapter extends BaseAdapter{

 private List<String> bulbList;
 private Context context;
 private OnClickListenerEditOrDelete onClickListenerEditOrDelete;

  public ListViewSlideAdapter(Context context, List<String> bulbList){
   this.bulbList=bulbList;
   this.context=context;
  }

  @Override
  public int getCount() {
   return bulbList.size();
  }

  @Override
  public Object getItem(int position) {
   return bulbList.get(position);
  }

  @Override
  public long getItemId(int position) {
   return position;
  }

  @Override
  public View getView(final int position, View convertView, ViewGroup parent) {
   final String bulb=bulbList.get(position);
   View view;
   ViewHolder viewHolder;
   if(null == convertView) {
    view = View.inflate(context, R.layout.item_slide_delete_edit, null);
    viewHolder=new ViewHolder();
    viewHolder.tvName=(TextView)view.findViewById(R.id.tvName);
    viewHolder.img=(ImageView)view.findViewById(R.id.imgLamp);
    viewHolder.tvDelete=(TextView)view.findViewById(R.id.delete);
    viewHolder.tvEdit=(TextView)view.findViewById(R.id.tvEdit);
    view.setTag(viewHolder);//store up viewHolder
   }else {
    view=convertView;
    viewHolder=(ViewHolder)view.getTag();
   }

   viewHolder.img.setImageResource(R.mipmap.ic_launcher);
   viewHolder.tvName.setText(bulb);
   viewHolder.tvDelete.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
     if (onClickListenerEditOrDelete!=null){
      onClickListenerEditOrDelete.OnClickListenerDelete(position);
     }
    }
   });
   viewHolder.tvEdit.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
     if (onClickListenerEditOrDelete!=null){
      onClickListenerEditOrDelete.OnClickListenerEdit(position);
     }
    }
   });
   return view;
  }

  private class ViewHolder{
   TextView tvName,tvEdit,tvDelete;
   ImageView img;
  }

 public interface OnClickListenerEditOrDelete{
  void OnClickListenerEdit(int position);
  void OnClickListenerDelete(int position);
 }

 public void setOnClickListenerEditOrDelete(OnClickListenerEditOrDelete onClickListenerEditOrDelete1){
  this.onClickListenerEditOrDelete=onClickListenerEditOrDelete1;
 }

 }
  

自定义ListView文件代码：

package com.lei.slidelistview;

import android.content.Context;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.MotionEvent;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.LinearLayout;
import android.widget.ListView;

public class SlideListView extends ListView {
 private int mScreenWidth; // 屏幕宽度
 private int mDownX; // 按下点的x值
 private int mDownY; // 按下点的y值
 private int mDeleteBtnWidth;// 删除按钮的宽度
 
 private boolean isDeleteShown; // 删除按钮是否正在显示
 
 private ViewGroup mPointChild; // 当前处理的item
 private LinearLayout.LayoutParams mLayoutParams; // 当前处理的item的LayoutParams
 
 public SlideListView(Context context, AttributeSet attrs) {
 this(context, attrs, 0);
 }

 public SlideListView(Context context, AttributeSet attrs, int defStyle) {
 super(context, attrs, defStyle);
 
 // 获取屏幕宽度
 WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
 DisplayMetrics dm = new DisplayMetrics();
 wm.getDefaultDisplay().getMetrics(dm);
 mScreenWidth = dm.widthPixels;
 }
 
 @Override
 public boolean onTouchEvent(MotionEvent ev) {
 switch (ev.getAction()) {
 case MotionEvent.ACTION_DOWN:
 performActionDown(ev);
 break;
 case MotionEvent.ACTION_MOVE:
 return performActionMove(ev);
 case MotionEvent.ACTION_UP:
 performActionUp();
 break;
 }
 
 return super.onTouchEvent(ev);
 }

 // 处理action_down事件
 private void performActionDown(MotionEvent ev) {
 if(isDeleteShown) {
 turnToNormal();
 }
 
 mDownX = (int) ev.getX();
 mDownY = (int) ev.getY();
 // 获取当前点的item
 mPointChild = (ViewGroup) getChildAt(pointToPosition(mDownX, mDownY)
 - getFirstVisiblePosition());
 // 获取删除按钮的宽度
 mDeleteBtnWidth = mPointChild.getChildAt(1).getLayoutParams().width;
 mLayoutParams = (LinearLayout.LayoutParams) mPointChild.getChildAt(0)
 .getLayoutParams();
 mLayoutParams.width = mScreenWidth;
 mPointChild.getChildAt(0).setLayoutParams(mLayoutParams);
 }
 
 // 处理action_move事件
 private boolean performActionMove(MotionEvent ev) {
 int nowX = (int) ev.getX();
 int nowY = (int) ev.getY();
 if(Math.abs(nowX - mDownX) > Math.abs(nowY - mDownY)) {
 // 如果向左滑动
 if(nowX < mDownX) {
 // 计算要偏移的距离
 int scroll = (nowX - mDownX) / 2;
 // 如果大于了删除按钮的宽度， 则最大为删除按钮的宽度
 if(-scroll >= mDeleteBtnWidth) {
  scroll = -mDeleteBtnWidth;
 }
 // 重新设置leftMargin
 mLayoutParams.leftMargin = scroll*2;
 mPointChild.getChildAt(0).setLayoutParams(mLayoutParams);
 }
 return true;
 }
 return super.onTouchEvent(ev);
 }
 
 // 处理action_up事件
 private void performActionUp() {
 // 偏移量大于button的一半，则显示button
 // 否则恢复默认
 if(-mLayoutParams.leftMargin >= mDeleteBtnWidth / 2) {
 mLayoutParams.leftMargin = -mDeleteBtnWidth*2;
 isDeleteShown = true;
 }else {
 turnToNormal();
 }
 
 mPointChild.getChildAt(0).setLayoutParams(mLayoutParams);
 }
 /**
 * 变为正常状态
 */
 public void turnToNormal() {
 mLayoutParams.leftMargin = 0;
 mPointChild.getChildAt(0).setLayoutParams(mLayoutParams);
 isDeleteShown = false;
 }
 /**
 * 当前是否可点击
 * @return 是否可点击
 */
 public boolean canClick() {
 return !isDeleteShown;
 }


}

下面附上使用布局代码+使用后台代码（2016年7月7日亲测可用）
布局： 

<?xml version=\"1.0\" encoding=\"utf-8\"?>
<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\"
 tools:context=\"com.lei.slidelistview.MainActivity\">

 <TextView
  android:id=\"@+id/tvTitle\"
  android:layout_width=\"match_parent\"
  android:layout_height=\"wrap_content\"
  android:gravity=\"center\"
  android:textSize=\"20sp\"
  android:text=\"title\" />

 <com.lei.slidelistview.SlideListView
  android:id=\"@+id/list\"
  android:layout_width=\"match_parent\"
  android:layout_height=\"wrap_content\"
  android:layout_below=\"@+id/tvTitle\">

 </com.lei.slidelistview.SlideListView>
</RelativeLayout>

使用后台代码，这里要注意以下adapter设置监听的位置，放错了会报错哦 

package com.lei.slidelistview;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
 private SlideListView listView;
 private List<String> list=new ArrayList<String>();
 private ListViewSlideAdapter listViewSlideAdapter;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  getData();
  initView();
 }

 private void initView(){
  listView=(SlideListView)findViewById(R.id.list);
  listViewSlideAdapter=new ListViewSlideAdapter(this,list);
  listView.setAdapter(listViewSlideAdapter);
  listViewSlideAdapter.setOnClickListenerEditOrDelete(new ListViewSlideAdapter.OnClickListenerEditOrDelete() {
   @Override
   public void OnClickListenerEdit(int position) {
    Toast.makeText(MainActivity.this, \"edit position: \" + position, Toast.LENGTH_SHORT).show();
   }

   @Override
   public void OnClickListenerDelete(int position) {
    Toast.makeText(MainActivity.this, \"delete position: \" + position, Toast.LENGTH_SHORT).show();
   }
  });
 }

 private void getData(){
  for (int i=0;i<20;i++){
   list.add(new String(\"第\"+i+\"个item\"));
  }
 }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持phpstudy。

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