Android仿QQ左滑删除置顶ListView操作

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;/** * Created by MooreLi on 2016/8/8. */public class SlideListView extends ListView {  private String TAG = getClass().getSimpleName();  private int mScreenWidth;  private int mDownX;  private int mDownY;  private int mMenuWidth;  private boolean isMenuShow;  private boolean isMoving;  private int mOperatePosition = -1;  private ViewGroup mPointChild;  private LinearLayout.LayoutParams mLayoutParams;  public SlideListView(Context context) {    super(context);    getScreenWidth(context);  }  public SlideListView(Context context, AttributeSet attrs) {    super(context, attrs);    getScreenWidth(context);  }  public SlideListView(Context context, AttributeSet attrs, int defStyleAttr) {    super(context, attrs, defStyleAttr);    getScreenWidth(context);  }  private void getScreenWidth(Context context) {    WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);    DisplayMetrics dm = new DisplayMetrics();    manager.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:        performActionMove(ev);        break;      case MotionEvent.ACTION_UP:        performActionUp();        break;    }    return super.onTouchEvent(ev);  }  private void performActionDown(MotionEvent ev) {    mDownX = (int) ev.getX();    mDownY = (int) ev.getY();    //如果点击的不是同一个item，则关掉正在显示的菜单    int position = pointToPosition(mDownX, mDownY);    if (isMenuShow && position != mOperatePosition) {      turnToNormal();    }    mOperatePosition = position;    mPointChild = (ViewGroup) getChildAt(position - getFirstVisiblePosition());    if (mPointChild != null) {      mMenuWidth = mPointChild.getChildAt(1).getLayoutParams().width;      mLayoutParams = (LinearLayout.LayoutParams) mPointChild.getChildAt(0).getLayoutParams();      mLayoutParams.width = mScreenWidth;      setChildLayoutParams();    }  }  private boolean performActionMove(MotionEvent ev) {    int nowX = (int) ev.getX();    int nowY = (int) ev.getY();//    if (isMoving) {//      if (Math.abs(nowY - mDownY) > 0) {//        Log.e(TAG, "kkkkkkk");//        onInterceptTouchEvent(ev);//      }//    }    if (Math.abs(nowX - mDownX) > 0) {      //左滑 显示菜单      if (nowX < mDownX) {        if (isMenuShow) {          mLayoutParams.leftMargin = -mMenuWidth;        } else {          //计算显示的宽度          int scroll = (nowX - mDownX);          if (-scroll >= mMenuWidth) {            scroll = -mMenuWidth;          }          mLayoutParams.leftMargin = scroll;        }      }      //右滑 如果菜单显示状态，则关闭菜单      if (isMenuShow && nowX > mDownX) {        int scroll = nowX - mDownX;        if (scroll >= mMenuWidth) {          scroll = mMenuWidth;        }        mLayoutParams.leftMargin = scroll - mMenuWidth;      }      setChildLayoutParams();      isMoving = true;      return true;    }    return super.onTouchEvent(ev);  }  private void performActionUp() {    //超过一半时，显示菜单，否则隐藏    if (-mLayoutParams.leftMargin >= mMenuWidth / 2) {      mLayoutParams.leftMargin = -mMenuWidth;      setChildLayoutParams();      isMenuShow = true;    } else {      turnToNormal();    }    isMoving = false;  }  private void setChildLayoutParams(){    if(mPointChild != null){      mPointChild.getChildAt(0).setLayoutParams(mLayoutParams);    }  }  /**   * 正常显示   */  public void turnToNormal() {    mLayoutParams.leftMargin = 0;    mOperatePosition = -1;    setChildLayoutParams();    isMenuShow = false;  }}

<?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:background="#FFFFFF"  android:orientation="horizontal">  <LinearLayout    android:layout_width="match_parent"    android:layout_height="60dp"    android:orientation="horizontal">    <TextView      android:id="@+id/main_tv_title"      android:layout_width="wrap_content"      android:layout_height="match_parent"      android:layout_marginLeft="10dp"      android:gravity="center_vertical"      android:textSize="18sp" />  </LinearLayout>  <LinearLayout    android:layout_width="180dp"    android:layout_height="60dp"    android:orientation="horizontal">    <TextView      android:id="@+id/main_tv_delete"      android:layout_width="0dp"      android:layout_height="match_parent"      android:layout_weight="1"      android:background="#FF0000"      android:gravity="center"      android:text="删除"      android:textColor="#FFFFFF" />    <TextView      android:id="@+id/main_tv_top"      android:layout_width="0dp"      android:layout_height="match_parent"      android:layout_weight="1"      android:background="#DFCDBF"      android:gravity="center"      android:text="置顶"      android:textColor="#FFFFFF" />  </LinearLayout></LinearLayout>

    holder.tvTitle.setText(mInfos.get(position));    holder.tvDelete.setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View v) {        mInfos.remove(position);        notifyDataSetChanged();        mListView.turnToNormal();      }    });    holder.tvTop.setOnClickListener(new View.OnClickListener() {      @Override      public void onClick(View v) {        String temp = mInfos.get(position);        mInfos.remove(position);        mInfos.add(0, temp);        notifyDataSetChanged();        mListView.turnToNormal();      }    });