PopuWindow用法

public class MainActivity extends AppCompatActivity {

    private ListView listView;
    private List<ItemBean> data;
    private MyAdapter myAdapter;


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

//创建数据
    private void initData() {
        data = new ArrayList<>();
        for (int i = 0; i < 20; i++) {
            ItemBean itemBean = new ItemBean("title " + i, "content " + i);
            data.add(itemBean);
        }


        if (myAdapter == null) {
            myAdapter = new MyAdapter(this, data);
            listView.setAdapter(myAdapter);
        }
    }

//list展示
    private void initView() {
        listView = (ListView) findViewById(R.id.list_view);
    }

}

适配器

public class MyAdapter extends BaseAdapter {
    private Context context;
    private List<ItemBean> data;
    private LayoutInflater mLayoutInflater;
    private PopupWindow mPopupWindow;
    private TextView deleteView;
    private ImageView closeView;


    public MyAdapter(Context context, List<ItemBean> data) {
        this.context = context;
        this.data = data;
        mLayoutInflater = LayoutInflater.from(context);
        initPopView();
    }


    @Override
    public int getCount() {
        return data == null ? 0 : data.size();
    }


    @Override
    public Object getItem(int position) {
        return data == null ? null : data.get(position);
    }


    @Override
    public long getItemId(int position) {
        return 0;
    }


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {


        ViewHolder holder;
        if (convertView == null) {
            holder = new ViewHolder();
            convertView = mLayoutInflater.inflate(R.layout.item_layout, null);
            holder.titleView = (TextView) convertView.findViewById(R.id.title_tv);
            holder.contentView = (TextView) convertView.findViewById(R.id.content_tv);
            holder.moreView = (ImageView) convertView.findViewById(R.id.more_iv);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.titleView.setText(data.get(position).getTitle());
        holder.contentView.setText(data.get(position).getContent());
        holder.moreView.setOnClickListener(new PopAction(position));
        return convertView;
    }


    class ViewHolder {
        private TextView titleView;
        private TextView contentView;
        private ImageView moreView;
    }


    class PopAction implements View.OnClickListener {


        private int position;


        public PopAction(int position) {
            this.position = position;
        }


        @Override
        public void onClick(View v) {
            //操作对应positiion的数据
            int[] array = new int[2];
            v.getLocationOnScreen(array);
            int x = array[0];
            int y = array[1];
            showPop(v, position, x, y);
        }
    }


    private void initPopView() {
        View popwindowLayout = mLayoutInflater.inflate(R.layout.popwindow_layout, null);
        mPopupWindow = new PopupWindow(popwindowLayout, ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        mPopupWindow.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#000000")));
        mPopupWindow.setAnimationStyle(R.style.popWindowAnimation);


        //知道popwindow中间的控件 ,去做点击
        deleteView = (TextView) popwindowLayout.findViewById(R.id.delete_tv);
        closeView = (ImageView) popwindowLayout.findViewById(R.id.close_iv);
    }


    private void showPop(View parent, final int position, int x, int y) {


        //根据view的位置显示popupwindow的位置
        mPopupWindow.showAtLocation(parent, 0, x, y);


        //根据view的位置popupwindow将显示到他的下面 , 可以通过x ,y 参数修正这个位置
        // mPopupWindow.showAsDropDown(parent,0,-50);


        //设置popupwindow可以获取焦点,不获取焦点的话 popupwiondow点击无效
        mPopupWindow.setFocusable(true);


        //点击popupwindow的外部,popupwindow消失
        mPopupWindow.setOutsideTouchable(true);


        deleteView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                data.remove(position);
                notifyDataSetChanged();
                if (mPopupWindow.isShowing()) {
                    mPopupWindow.dismiss();
                }
            }
        });


        closeView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (mPopupWindow.isShowing()) {
                    mPopupWindow.dismiss();
                }
            }
        });




    }
}