Android实现ListView左右滑动删除和编辑

概述有时候，为了实现项目中的需求，完成设计好的用户交互体验，不的不把这些View重新改造成自己想要的效果。

有时候，为了实现项目中的需求，完成设计好的用户交互体验，不的不把这些VIEw重新改造成自己想要的效果。

AndroID原生的ListVIEw是不支持左右滑动的，但是看到微信电话本上，联系人可以左右滑动进行 *** 作的，就通过自己的设想和思路，并加以实现了。

思路:
1.获取到手指放到屏幕时的x，y位置，并判断点击的处于ListVIEw的那个position。
2.判断滑动的方向，如果是上下方向，touch事件就交给ListVIEw处理；如果是左右方向，就禁止ListVIEw进行滑动。
3.根据手指的移动，来移动选中的VIEw。
4.滑动结束后，把VIEw归位。
5.通过传入的监听器，告诉用户是左滑动还是右滑动。

效果图：

重新的ListVIEw的代码：

package com.example.wz.vIEw;import androID.annotation.Suppresslint;import androID.content.Context;import androID.os.Handler;import androID.util.AttributeSet;import androID.vIEw.MotionEvent;import androID.vIEw.VeLocityTracker;import androID.vIEw.VIEw;import androID.vIEw.VIEwConfiguration;import androID.vIEw.WindowManager;import androID.Widget.AdapterVIEw;import androID.Widget.ListVIEw;import androID.Widget.TextVIEw;import com.example.wz.R;import com.example.wz.util.MyLog;import com.example.wz.util.OpenLooper;import com.example.wz.util.OpenLooper.LoopCallback;public class MyListVIEw extends ListVIEw { public MyLog log = new MyLog(this,true); public float screenWIDth; public int mtouchSlop; public float density; public MyListVIEw(Context context) {  super(context); } public MyListVIEw(Context context,AttributeSet attrs) {  this(context,attrs,0); } public float transleteSpeed = 2f; public OpenLooper openLooper = null; public LoopCallback loopCallback = null; @SuppressWarnings("deprecation") public MyListVIEw(Context context,AttributeSet attrs,int defStyle) {  super(context,defStyle);  this.screenWIDth = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultdisplay().getWIDth();  this.mtouchSlop = VIEwConfiguration.get(getContext()).getScaledtouchSlop();  this.density = context.getResources().getdisplayMetrics().density;  this.openLooper = new OpenLooper();  this.openLooper.createOpenLooper();  this.loopCallback = new ListLoopCallback(this.openLooper);  this.openLooper.loopCallback = this.loopCallback; } public class BodyStatus {  public int None = 0,Down = 1,Move = 2,Up = 3,Homing = 4;  int state = None; } public BodyStatus bodyStatus = new BodyStatus(); public class RemoveDirection {  public int None = 0,left = 1,Right = 2,Homing_left = 3,Homing_Right = 4;  public int state = None; } public RemoveDirection removeDirection = new RemoveDirection(); public class ListLoopCallback extends LoopCallback {  public ListLoopCallback(OpenLooper openLooper) {   openLooper.super();  }  @OverrIDe  public voID loop(double ellapsedMillis) {   if (bodyStatus.state == bodyStatus.Homing) {    goHoming((float) ellapsedMillis);   }  } } public voID goHoming(float delta) {  float distance = (float) delta * transleteSpeed;  if (removeDirection.state == removeDirection.left) {   float currentX = itemVIEw.getScrollX() + distance;   if (currentX > screenWIDth) {    distance = distance - (currentX - screenWIDth);   }   itemVIEw.scrollBy((int) (distance),itemVIEw.getScrollY());   if (itemVIEw.getScrollX() > screenWIDth / 2 + 40 * screenWIDth / 1080) {    t2.setTranslationX(itemVIEw.getScrollX() - screenWIDth / 2 - 40 * 3f);   } else {    t2.setTranslationX(40 * 3f);   }  } else if (removeDirection.state == removeDirection.Right) {   float currentX = itemVIEw.getScrollX() - distance;   if (currentX < -screenWIDth) {    distance = distance - (Math.abs(currentX) - screenWIDth);   }   itemVIEw.scrollBy((int) (-distance),itemVIEw.getScrollY());   if (itemVIEw.getScrollX() < -(screenWIDth / 2 + 40 * 3f * 2)) {    t1.setTranslationX(-(Math.abs(itemVIEw.getScrollX()) - screenWIDth / 2 - 40 * 3f));   } else {    t1.setTranslationX(-40 * 3f);   }  } else if (removeDirection.state == removeDirection.Homing_left) {   float currentX = itemVIEw.getScrollX() - distance;   if (currentX < 0) {    distance = distance - (Math.abs(currentX));   }   itemVIEw.scrollBy((int) (-distance),itemVIEw.getScrollY());  } else if (removeDirection.state == removeDirection.Homing_Right) {   float currentX = itemVIEw.getScrollX() + distance;   if (currentX > 0) {    distance = distance - currentX;   }   itemVIEw.scrollBy((int) (distance),itemVIEw.getScrollY());  }  if (itemVIEw.getScrollX() == 0 || itemVIEw.getScrollX() >= screenWIDth || itemVIEw.getScrollX() <= -screenWIDth) {   openLooper.stop();   if (itemVIEw.getScrollX() >= screenWIDth) {    mRemoveListener.removeItem(removeDirection,position);   } else if (itemVIEw.getScrollX() <= -screenWIDth) {    mRemoveListener.removeItem(removeDirection,position);   }   new Handler().postDelayed(new Runnable() {    @OverrIDe    public voID run() {     itemVIEw.scrollTo(0,itemVIEw.getScrollY());     bodyStatus.state = bodyStatus.None;    }   },300);  } } public int touch_down_x; public int touch_down_y; public VIEw itemVIEw; public TextVIEw t1; public TextVIEw t2; public int SNAP_VELociTY = 800; public int position; @OverrIDe public boolean dispatchtouchEvent(MotionEvent event) {  int action = event.getAction();  if (action == MotionEvent.ACTION_DOWN) {   // addVeLocityTracker(event);   if (bodyStatus.state != bodyStatus.None) {    return super.dispatchtouchEvent(event);   }   this.touch_down_x = (int) event.getX();   this.touch_down_y = (int) event.getY();   position = pointToposition(touch_down_x,touch_down_y);   if (position == AdapterVIEw.INVALID_position) {    return super.dispatchtouchEvent(event);   }   itemVIEw = getChildAt(position - getFirstVisibleposition());   t2 = (TextVIEw) itemVIEw.findVIEwByID(R.ID.t2);   t1 = (TextVIEw) itemVIEw.findVIEwByID(R.ID.t1);  } else if (action == MotionEvent.ACTION_MOVE) {   if (Math.abs(getScrollVeLocity()) > SNAP_VELociTY || (Math.abs(event.getX() - touch_down_x) > mtouchSlop && Math.abs(event.getY() - touch_down_y) < mtouchSlop)) {    isSlIDe = true;   }  } else if (action == MotionEvent.ACTION_UP) {   int veLocityX = getScrollVeLocity();   if (Math.abs(veLocityX) > SNAP_VELociTY) {    if (veLocityX > SNAP_VELociTY) {     bodyStatus.state = bodyStatus.Homing;     removeDirection.state = removeDirection.Right;     openLooper.start();    } else {     bodyStatus.state = bodyStatus.Homing;     removeDirection.state = removeDirection.left;     openLooper.start();    }   } else {    if (itemVIEw.getScrollX() >= screenWIDth / 2) {     bodyStatus.state = bodyStatus.Homing;     removeDirection.state = removeDirection.left;     openLooper.start();    } else if (itemVIEw.getScrollX() <= -screenWIDth / 2) {     bodyStatus.state = bodyStatus.Homing;     removeDirection.state = removeDirection.Right;     openLooper.start();    } else {     if (itemVIEw.getScrollX() < 0) {      removeDirection.state = removeDirection.Homing_Right;     } else {      removeDirection.state = removeDirection.Homing_left;     }     bodyStatus.state = bodyStatus.Homing;     openLooper.start();    }   }   recycleVeLocityTracker();   isSlIDe = false;  }  return super.dispatchtouchEvent(event); } public boolean isSlIDe = false; @Suppresslint("Recycle") @OverrIDe public boolean ontouchEvent(MotionEvent event) {  if (isSlIDe && position != AdapterVIEw.INVALID_position) {   requestdisallowIntercepttouchEvent(true);   addVeLocityTracker(event);   int x = (int) event.getX();   int action = event.getAction();   if (action == MotionEvent.ACTION_DOWN) {   } else if (action == MotionEvent.ACTION_MOVE) {    MotionEvent cancelEvent = MotionEvent.obtain(event);    cancelEvent.setAction(MotionEvent.ACTION_CANCEL | (event.getActionIndex() << MotionEvent.ACTION_POINTER_INDEX_SHIFT));    ontouchEvent(cancelEvent);    int deltaX = touch_down_x - x;    touch_down_x = x;    if (itemVIEw.getScrollX() > screenWIDth / 2 + 40 * 3f * 2) {     t2.setTranslationX(itemVIEw.getScrollX() - screenWIDth / 2 - 40 * 3f);    } else {     t2.setTranslationX(40 * 3f);    }    if (itemVIEw.getScrollX() < -(screenWIDth / 2 + 40 * 3f * 2)) {     t1.setTranslationX(-(Math.abs(itemVIEw.getScrollX()) - screenWIDth / 2 - 40 * 3f));    } else {     t1.setTranslationX(-40 * 3f);    }    itemVIEw.scrollBy(deltaX,0);    return true;   }  }  return super.ontouchEvent(event); } public RemoveListener mRemoveListener; public voID setRemoveListener(RemoveListener removeListener) {  this.mRemoveListener = removeListener; } public interface RemoveListener {  public voID removeItem(RemoveDirection direction,int position); } public VeLocityTracker veLocityTracker; public voID addVeLocityTracker(MotionEvent event) {  if (veLocityTracker == null) {   veLocityTracker = VeLocityTracker.obtain();  }  veLocityTracker.addMovement(event); } public int getScrollVeLocity() {  if (veLocityTracker != null) {   veLocityTracker.computeCurrentVeLocity(1000);   int veLocity = (int) veLocityTracker.getXVeLocity();   return veLocity;  }  return 0; } public voID recycleVeLocityTracker() {  if (veLocityTracker != null) {   veLocityTracker.recycle();   veLocityTracker = null;  } }}

测试ListVIEw的Activity代码：

package com.example.wz;import java.util.ArrayList;import androID.app.Activity;import androID.os.Bundle;import androID.util.displayMetrics;import androID.util.Log;import androID.vIEw.LayoutInflater;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;import androID.Widget.BaseAdapter;import androID.Widget.TextVIEw;import com.example.wz.vIEw.MyListVIEw;import com.example.wz.vIEw.MyListVIEw.RemoveDirection;import com.example.wz.vIEw.MyListVIEw.RemoveListener;public class TestListActivity extends Activity { LayoutInflater mInflater; @OverrIDe protected voID onCreate(Bundle savedInstanceState) {  displayMetrics = new displayMetrics();  this.getwindowManager().getDefaultdisplay().getMetrics(displayMetrics);  super.onCreate(savedInstanceState);  setContentVIEw(R.layout.activity_testList);  mInflater = getLayoutInflater();  ListVIEw = (MyListVIEw) findVIEwByID(R.ID.slIDeCutListVIEw);  showAddressDialog(); } public displayMetrics displayMetrics; MyListVIEw ListVIEw; public ArrayList<String> items; public voID showAddressDialog() {  items = new ArrayList<String>() {   {    add("item...1");    add("item...2");    add("item...3");    add("item...4");    add("item...5");    add("item...6");    add("item...7");    add("item...8");    add("item...9");    add("item...10");    add("item...11");    add("item...12");    add("item...13");    add("item...14");    add("item...15");    add("item...16");    add("item...17");    add("item...18");    add("item...19");    add("item...20");   }  };  NearbyRelationAdapter nearbyRelationAdapter = new NearbyRelationAdapter();  ListVIEw.setAdapter(nearbyRelationAdapter);  ListVIEw.setRemoveListener(new RemoveListener() {   @OverrIDe   public voID removeItem(RemoveDirection direction,int position) {    if (direction.state == direction.left) {     Log.e("A","left" + "-" + position);    } else if (direction.state == direction.Right) {     Log.e("A","right" + "-" + position);    }   }  }); } public class NearbyRelationAdapter extends BaseAdapter {  @OverrIDe  public int getCount() {   return items.size();  }  @OverrIDe  public Object getItem(int posotion) {   return items.get(posotion);  }  @OverrIDe  public long getItemID(int posotion) {   return posotion;  }  @OverrIDe  public VIEw getVIEw(int position,VIEw convertVIEw,VIEwGroup parent) {   Holder holder = null;   if (convertVIEw == null) {    holder = new Holder();    convertVIEw = mInflater.inflate(R.layout.vIEw_menu_item1,null);    holder.Title = (TextVIEw) convertVIEw.findVIEwByID(R.ID.Title);    holder.o1 = convertVIEw.findVIEwByID(R.ID.o1);    holder.o1.setTranslationX(-displayMetrics.wIDthPixels);    holder.o2 = convertVIEw.findVIEwByID(R.ID.o2);    holder.o2.setTranslationX(displayMetrics.wIDthPixels);    convertVIEw.setTag(holder);   } else {    holder = (Holder) convertVIEw.getTag();   }   holder.Title.setText(items.get(position));   convertVIEw.scrollTo(0,convertVIEw.getScrollY());   return convertVIEw;  }  class Holder {   TextVIEw Title;   VIEw o1,o2;  } }}

ListVIEw布局文件：

<?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" androID:background="@androID:color/darker_gray" > <com.example.wz.vIEw.MyListVIEw  androID:ID="@+ID/slIDeCutListVIEw"  androID:layout_wIDth="match_parent"  androID:layout_height="match_parent"  androID:cachecolorHint="@androID:color/transparent"  androID:ListSelector="@androID:color/transparent" > </com.example.wz.vIEw.MyListVIEw> <TextVIEw  androID:layout_wIDth="1dp"  androID:layout_height="match_parent"  androID:layout_centerHorizontal="true"  androID:background="#0099cd" /></relativeLayout>

ListVIEw 的Item布局：

<?xml version="1.0" enCoding="utf-8"?><relativeLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:background="#fff" > <relativeLayout  androID:ID="@+ID/o1"  androID:layout_wIDth="match_parent"  androID:layout_height="60dp"  androID:background="#ff0000" >  <TextVIEw   androID:ID="@+ID/t1"   androID:layout_wIDth="80dp"   androID:layout_height="wrap_content"   androID:layout_alignParentRight="true"   androID:layout_centerVertical="true"   androID:gravity="center"   androID:padding="10dp"   androID:text="删除"   androID:textcolor="#99000000"   androID:textSize="18sp" /> </relativeLayout> <relativeLayout  androID:ID="@+ID/o2"  androID:layout_wIDth="match_parent"  androID:layout_height="60dp"  androID:background="#660099cd" >  <TextVIEw   androID:ID="@+ID/t2"   androID:layout_wIDth="80dp"   androID:layout_height="wrap_content"   androID:layout_alignParentleft="true"   androID:layout_centerVertical="true"   androID:gravity="center"   androID:padding="10dp"   androID:text="编辑"   androID:textcolor="#99000000"   androID:textSize="18sp" /> </relativeLayout> <relativeLayout  androID:ID="@+ID/r1"  androID:layout_wIDth="match_parent"  androID:layout_height="60dp"  androID:background="#fff" >  <TextVIEw   androID:ID="@+ID/Title"   androID:layout_wIDth="match_parent"   androID:layout_height="wrap_content"   androID:layout_centerVertical="true"   androID:gravity="center_vertical"   androID:textcolor="#99000000"   androID:textSize="18sp" /> </relativeLayout></relativeLayout>

代码中用到的其他的类，在上一篇文章中有： https://www.oudahe.com/p/23078/

转载来自：http://blog.csdn.net/qxs965266509

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