lisstview侧滑删除

自定义Listview,向左滑动，右边刚好显示删除按钮：

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;//                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;//            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;    }

    @Override    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {//与scrollview嵌套需要重新计算高度        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,                MeasureSpec.AT_MOST);        super.onMeasure(widthMeasureSpec, expandSpec);    }}

适配器：

public class ListViewSlideAdapter extends BaseAdapter {

    private ArrayList<String> bulbList;    private Activity context;    private OnClickListenerEditOrDelete onClickListenerEditOrDelete;

    public ListViewSlideAdapter(Activity context, ArrayList<String> bulbList) {

        this.bulbList = bulbList;        this.context = context;    }

    public void setmNews(ArrayList<String> mNews) {        this.bulbList = mNews;    }

    @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 str = bulbList.get(position);        ViewHolder viewHolder;        if (null == convertView) {            convertView = context.getLayoutInflater().inflate(R.layout.lay_list_collection_item, null);            viewHolder = new ViewHolder(convertView);            convertView.setTag(viewHolder);//store up viewHolder        } else {            viewHolder = (ViewHolder) convertView.getTag();        }        viewHolder.tvDelete.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if (onClickListenerEditOrDelete != null) {                    onClickListenerEditOrDelete.OnClickListenerDelete(position);                }            }        });

        if (!TextUtils.isEmpty(str.)) {            viewHolder.mTv.setText("" + str);        }

        return convertView;    }

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

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

    private class ViewHolder {

        TextView mTv;

        TextView tvDelete;

        ViewHolder(View view) {

            mTv = (TextView) view.findViewById(R.id.tv_title);

            tvDelete = (TextView) view.findViewById(R.id.tv_delete);        }    }

}

Item布局:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="@color/white"    android:orientation="horizontal">

            <TextView                android:id="@+id/tv_title"                android:layout_width="match_parent"                android:layout_height="match_parent"

                android:layout_weight="1"                android:maxLength="@integer/maxlength"

                android:textColor="@color/black"                android:textSize="@dimen/text_16" />

    <TextView        android:id="@+id/tv_delete"        android:layout_width="60dp"        android:layout_height="match_parent"        android:layout_marginLeft="@dimen/panding_5"        android:background="@color/color_26"        android:gravity="center"        android:text="删除"        android:textColor="@color/text_f7"        android:textSize="@dimen/text_16" />

</LinearLayout>

布局：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:fitsSystemWindows="true"    android:background="@color/color_f4"    android:orientation="vertical">

    <View        android:layout_width="match_parent"        android:layout_height="@dimen/margin_1"        android:background="@color/color_line_ae" />

    <...PullToRefreshScrollView        android:id="@+id/pull_refresh_scrollview"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_weight="1"        app:ptrAnimationStyle="flip"        app:ptrMode="both">

        <...SlideListView            android:id="@+id/listview"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:layout_marginLeft="@dimen/panding_5"            android:layout_marginRight="@dimen/panding_5"            android:divider="@null"            android:dividerHeight="0dp" />

    </...PullToRefreshScrollView>

    <TextView        android:id="@+id/tv_notic"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_weight="1"        android:gravity="center_horizontal"        android:paddingTop="20dp"        android:text="暂无收藏"        android:visibility="gone" />

例子：

 mListCollectionAdapter = new ListViewSlideAdapter(this, mMessageReceive);        mListView.setAdapter(mListCollectionAdapter);

        mListView.setOnItemClickListener(this);        mListCollectionAdapter.setOnClickListenerEditOrDelete(new ListViewSlideAdapter.OnClickListenerEditOrDelete() {            @Override            public void OnClickListenerDelete(int position) {               //删除按钮点击事件            }        });