android 自定义下拉框

一、 简介：

      原生Android 提供的spinner下拉框不怎么方便，样式有点丑。修改起来麻烦，于是就自己动手写了一下拉列表。

实现原理使用的是，popwindow弹框，可实现宽高自定义，下拉列表使用listview.

二、pop弹框代码，文件名SpinerPopWindow.java

import android.content.Context;
import android.graphics.drawable.ColorDrawable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView.OnItemClickListener;
import java.util.List;

import csu.xiaoya.robotApp.R;

/**
 * 自定义PopupWindow  
 *
 * @param 
 * @param 
 * @author Ansen
 * @create time
 */

public class SpinerPopWindow extends PopupWindow {
    private LayoutInflater inflater;
    private ListView mListView;
    private List list;
    private MyAdapter mAdapter;

    public SpinerPopWindow(Context context, List list, OnItemClickListener clickListener) {
        super(context);
        inflater = LayoutInflater.from(context);
        this.list = list;
        init(clickListener);
    }

    private void init(OnItemClickListener clickListener) {
        View view = inflater.inflate(R.layout.spiner_window_layout, null);
        setContentView(view);
        setWidth(LayoutParams.WRAP_CONTENT);
        setHeight(LayoutParams.WRAP_CONTENT);
        setFocusable(true);
        ColorDrawable dw = new ColorDrawable(0x00);
        setBackgroundDrawable(dw);
        mListView = (ListView) view.findViewById(R.id.listview);
        mListView.setAdapter(mAdapter = new MyAdapter());
        mListView.setOnItemClickListener(clickListener);
    }

    private class MyAdapter extends BaseAdapter {
        @Override
        public int getCount() {
            return list.size();
        }

        @Override
        public Object getItem(int position) {
            return list.get(position);
        }

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder = null;
            if (convertView == null) {
                holder = new ViewHolder();
                convertView = inflater.inflate(R.layout.spiner_item_layout, null);
                holder.tvName = (TextView) convertView.findViewById(R.id.tv_name);
                convertView.setTag(holder);
            } else {
                holder = (ViewHolder) convertView.getTag();
            }
            holder.tvName.setText(getItem(position).toString());
            return convertView;
        }
    }

    private class ViewHolder {
        private TextView tvName;
    }
}

三、spiner_window_layout布局

四、spiner_item_layout子布局

五、使用

    //调用
  @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        initSpinnerList();
    }

六、对应方法

 /**
     *
     */
    private SpinerPopWindow mSpinerPrincePopWindow;//省
 

    private List list;//省

    private TextView tvValue;

    private void initSpinnerList() {
        initData();
        tvValue = (TextView) findViewById(R.id.tv_province);
        tvValue.setOnClickListener(clickListener);
        // 省
        mSpinerPrincePopWindow = new SpinerPopWindow(this, list, itemClickListener);
        mSpinerPrincePopWindow.setOnDismissListener(dismissListener);

    }


 /**
     * 监听popupwindow取消
     */
    private OnDismissListener dismissListener = new OnDismissListener() {
        @Override
        public void onDismiss() {
            setTextImage(R.drawable.dw_arrow, mDataBinding.tvProvince);
        }
    };

    /**
     * popupwindow显示的ListView的item点击事件
     */
    private OnItemClickListener itemClickListener = new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView parent, View view, int position, long id) {
            mSpinerPrincePopWindow.dismiss();
            tvValue.setText(list.get(position));
        }
    };

    /**
     * 显示PopupWindow
     */
    private OnClickListener clickListener = new OnClickListener() {
        @Override
        public void onClick(View v) {
            switch (v.getId()) {
                case R.id.tv_province://省
                    mSpinerPrincePopWindow.setWidth(tvValue.getWidth());
                    mSpinerPrincePopWindow.showAsDropDown(tvValue);
                    setTextImage(R.drawable.icon_up, mDataBinding.tvProvince);
                    break;
             
            }
        }
    };


   /**
     * 初始化数据
     */
    private void initData() {
        list = new ArrayList();//省
        list.add("北京");
        list.add("上海");
        list.add("浙江");
        list.add("广东");
        list.add("江苏");
        list.add("湖南");
        list.add("湖北");
        list.add("四川");
        list.add("陕西");
     }

七、shape_help_category_tv_bg外形布局

八、shape_popupwindow_list_bg

九、完结