安卓-ListView侧滑删除

   前段时间用到了侧滑删除效果，在网上找了一些资料，结合一些代码做了个小测试，先看效果图

     效果图

                                       

   思路：ListView里的每个item做成一个可以滑动的自定义控件SlideView，然后时间均又外层的ListView拦截同时把事件传递给SlideView做滑动。

  下面我画的一个布局分布图，更方便直观的看代码

                                                  

  下面开始写代码：

  SlideView.java 继承LinearLayout的一个可以滑动的自定义控件

          

package widget.silddelete;import android.content.Context;import android.util.AttributeSet;import android.util.Log;import android.util.TypedValue;import android.view.MotionEvent;import android.view.View;import android.widget.LinearLayout;import android.widget.RelativeLayout;import android.widget.Scroller;import com.example.android.activity.R;public class SlideView extends LinearLayout {    private static final String TAG = "SlideView";    private Context mContext;    private LinearLayout mViewContent;    private RelativeLayout mHolder;    // Android里Scroller类是为了实现View平滑滚动的一个Helper类。    // 通常在自定义的View时使用，在View中定义一个私有成员mScroller = new Scroller(context)。    // 设置mScroller滚动的位置时，并不会导致View的滚动，    // 通常是用mScroller记录/计算View滚动的位置，再重写View的computeScroll()，完成实际的滚动。    private Scroller mScroller;    private OnSlideListener mOnSlideListener;    private int mHolderWidth = 120;    private int mLastX = 0;    private int mLastY = 0;    private static final int TAN = 2;    public interface OnSlideListener {        public static final int SLIDE_STATUS_OFF = 0;        public static final int SLIDE_STATUS_START_SCROLL = 1;        public static final int SLIDE_STATUS_ON = 2;        /**         * @param view current SlideView         * @param status SLIDE_STATUS_ON or SLIDE_STATUS_OFF         */        public void onSlide(View view, int status);    }    public SlideView(Context context) {        super(context);        initView();    }    //自定义控件attrs.xml的文件,并在此文件中增加对控件的属性的定义    public SlideView(Context context, AttributeSet attrs) {        super(context, attrs);        initView();    }    private void initView() {        mContext = getContext();        mScroller = new Scroller(mContext);    //设置为横向滑动        setOrientation(LinearLayout.HORIZONTAL);        View.inflate(mContext, R.layout.item_listview_delete, this);        mViewContent = (LinearLayout) findViewById(R.id.view_content);        mHolderWidth = Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, mHolderWidth, getResources()                        .getDisplayMetrics()));    }    //将view加到ViewContent中去    public void setContentView(View view) {        mViewContent.addView(view);    }    //设置滑动回调    public void setOnSlideListener(OnSlideListener onSlideListener) {        mOnSlideListener = onSlideListener;    }         public void shrink() {        if (getScrollX() != 0) {            this.smoothScrollTo(0, 0);        }    }    // 根据MotionEvent来进行滑动，这个方法的作用相当于onTouchEvent      // 如果你不需要处理滑动冲突，可以直接重命名，照样能正常工作      public void onRequireTouchEvent(MotionEvent event) {        int x = (int) event.getX();        int y = (int) event.getY();        int scrollX = getScrollX();        Log.d(TAG, "x=" + x + "  y=" + y);        switch (event.getAction()) {        case MotionEvent.ACTION_DOWN: {            if (!mScroller.isFinished()) {                mScroller.abortAnimation();            }            if (mOnSlideListener != null) {                mOnSlideListener.onSlide(this,                        OnSlideListener.SLIDE_STATUS_START_SCROLL);            }            break;        }        case MotionEvent.ACTION_MOVE: {            int deltaX = x - mLastX;            int deltaY = y - mLastY;            if (Math.abs(deltaX) < Math.abs(deltaY) * TAN) {                   // 滑动不满足条件，不做横向滑动                 break;            }                     // 计算滑动终点是否合法，防止滑动越界              int newScrollX = scrollX - deltaX;            if (deltaX != 0) {                if (newScrollX < 0) {                    newScrollX = 0;                } else if (newScrollX > mHolderWidth) {                    newScrollX = mHolderWidth;                }                this.scrollTo(newScrollX, 0);            }            break;        }        case MotionEvent.ACTION_UP: {            int newScrollX = 0;            if (scrollX - mHolderWidth * 0.75 > 0) {                newScrollX = mHolderWidth;            }            this.smoothScrollTo(newScrollX, 0);            if (mOnSlideListener != null) {                mOnSlideListener.onSlide(this,                        newScrollX == 0 ? OnSlideListener.SLIDE_STATUS_OFF                                : OnSlideListener.SLIDE_STATUS_ON);            }            break;        }        default:            break;        }        mLastX = x;        mLastY = y;    }    private void smoothScrollTo(int destX, int destY) {        // 缓慢滚动到指定位置        int scrollX = getScrollX();        int delta = destX - scrollX;        mScroller.startScroll(scrollX, 0, delta, 0, Math.abs(delta) * 3);        invalidate();    }    @Override    public void computeScroll() {        if (mScroller.computeScrollOffset()) {            scrollTo(mScroller.getCurrX(), mScroller.getCurrY());            postInvalidate();        }    }}

ListViewCompat继承Listview

package widget.silddelete;import android.content.Context;import android.util.AttributeSet;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.widget.ListView;import com.explms.deletelistview.CarListItemModel;public class ListViewCompat extends ListView {    private static final String TAG = "ListViewCompat";    private SlideView mFocusedItemView;    public ListViewCompat(Context context) {        super(context);    }    public ListViewCompat(Context context, AttributeSet attrs) {        super(context, attrs);    }    public ListViewCompat(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);    }    @Override    public boolean onTouchEvent(MotionEvent event) {        switch (event.getAction()) {        case MotionEvent.ACTION_DOWN: {            int x = (int) event.getX();            int y = (int) event.getY();            int position = pointToPosition(x, y);            Log.e(TAG, "postion=" + position);            if (position != INVALID_POSITION) {                CarListItemModel data = (CarListItemModel) getItemAtPosition(position);                mFocusedItemView = data.slideView;                Log.e(TAG, "FocusedItemView=" + mFocusedItemView);            }        }        default:            break;        }        if (mFocusedItemView != null) {            mFocusedItemView.onRequireTouchEvent(event);        }        return super.onTouchEvent(event);    }}

MainActivity.java

package com.explms.deletelistview;import android.app.Activity;import android.os.Bundle;import android.view.View;import com.example.android.activity.R;import widget.silddelete.ListViewCompat;import widget.silddelete.SlideView;import java.util.ArrayList;public  class MainActivity extends Activity implements SlideView.OnSlideListener {    /**     * Called when the activity is first created.     */    ListViewCompat popCarListview;    ArrayList<CarListItemModel> poplist;    private SlideView mLastSlideViewWithStatusOn;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        initview();    }    public  void initview() {        popCarListview= (ListViewCompat)findViewById(R.id.car_pop_list);        popCarListview.setAdapter(new PopCarListAdapter(this,getlist()));    }    //<span style="color: rgb(0, 130, 0); font-family: Consolas, 'Courier New', Courier, mono, serif; line-height: 18px;">向当前点击的view发送滑动事件请求，其实就是向SlideView发请求</span>    @Override    public void onSlide(View view, int status) {        if (mLastSlideViewWithStatusOn != null && mLastSlideViewWithStatusOn != view) {            mLastSlideViewWithStatusOn.shrink();        }        if (status == SLIDE_STATUS_ON) {            mLastSlideViewWithStatusOn = (SlideView) view;        }    }    public ArrayList<CarListItemModel> getlist(){        poplist=new ArrayList<CarListItemModel>();        for (int i = 0; i < 10; i++) {            CarListItemModel item = new CarListItemModel();            if (i % 2 == 0) {                item.circleImage = R.drawable.img2;                item.productName = "粉红衬衫";                item.productSize= "S";                item.producrPrice= "25.00";                item.productNumber=""+i;            } else {                item.circleImage = R.drawable.img3;                item.productName = "格子衫";                item.productSize= "M";                item.producrPrice= "65.00";                item.productNumber=""+i;            }            poplist.add(item);        }        return poplist;    }}

PopCarListAdapter.java   listview适配器

package com.explms.deletelistview;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;import com.example.android.activity.R;import widget.silddelete.SlideView;import java.util.ArrayList;/** * Created by Administrator on 7/30/15. */public class PopCarListAdapter extends BaseAdapter{    LayoutInflater inflater;    ArrayList<CarListItemModel> list;    Context context;    public PopCarListAdapter(Context context,ArrayList<CarListItemModel> list){        this.context=context;        this.list=list;        inflater=LayoutInflater.from(context);    }    @Override    public int getCount() {        return list.size();    }    @Override    public Object getItem(int i) {        return list.get(i);    }    @Override    public long getItemId(int i) {        return i;    }    @Override    public View getView(final int i, View view, ViewGroup viewGroup) {        ViewHolder holder;        SlideView slideView = (SlideView) view;        if (slideView == null) {            View itemView = inflater.inflate(R.layout.item_listview_silde, null);            slideView = new SlideView(context);            slideView.setContentView(itemView);            holder = new ViewHolder(slideView);            slideView.setOnSlideListener((SlideView.OnSlideListener) context);            slideView.setTag(holder);        } else {            holder = (ViewHolder) slideView.getTag();        }        CarListItemModel item = list.get(i);        item.slideView = slideView;        item.slideView.shrink();        holder.circleImage.setImageResource(item.circleImage);        holder.productName.setText(item.productName);        holder.productSize.setText(item.productSize);        holder.producrPrice.setText(item.producrPrice);        holder.productNumber.setText(item.productNumber);        holder.deleteHolder.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                list.remove(i);                PopCarListAdapter.this.notifyDataSetChanged();            }        });        return slideView;    }}class ViewHolder {    public ImageView circleImage;    public TextView productName;    public TextView productSize;    public TextView producrPrice;    public TextView productNumber;    public ViewGroup deleteHolder;    ViewHolder(View view) {       circleImage = (ImageView) view.findViewById(R.id.product_image_circle);       productName= (TextView) view.findViewById(R.id.productname);       productSize = (TextView) view.findViewById(R.id.productsize);       productNumber = (TextView) view.findViewById(R.id.productnumber);       producrPrice= (TextView) view.findViewById(R.id.productprice);       deleteHolder = (ViewGroup)view.findViewById(R.id.holder);   }}

数据模型CarListItemModel.java

package com.explms.deletelistview;import widget.silddelete.SlideView;public class CarListItemModel {    public int circleImage;    public String productName;    public String productSize;    public String producrPrice;    public String productNumber;    public SlideView slideView;}

另外此博文部分代码借鉴http://blog.csdn.net/singwhatiwanna/article/details/17515543，写的比较清楚，大家可以去看看