android 弹出选择层

【实例截图】

【核心代码】

package com.demo.selectdemo;

import java.util.List;

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.drawable.ColorDrawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.WindowManager.LayoutParams;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.TextView;

/**
 * @author 银发の卡修
 * @since 2015年8月1日20:32:16
 */
public class SelectPopDlg extends PopupWindow implements OnClickListener, OnItemClickListener {
	
	/**
	 * 监听接口
	 */
	public static interface OnSelectPopDlgListener {
		
		/**
		 * 当用户选中的时候回调该方法。
		 * 该方法仅在弹出窗口消失时候回调。
		 * 
		 * @param selectPopDlg
		 * @param choice
		 * @param position
		 */
		public void onSelectedChoice(SelectPopDlg selectPopDlg, ChoiceBean choice, int position);
		
	}
	
	private View contentView;
	private TextView titleTxt;
	private TextView bottomMsgTxt;
	private ListView listView;
	private ImageButton backBtn;
	
	private ChoiceAdapter choiceAdapter;
	
	private OnSelectPopDlgListener onSelectPopDlgListener;
	
	public void setOnSelectPopDlgListener(OnSelectPopDlgListener onSelectPopDlgListener) {
		this.onSelectPopDlgListener = onSelectPopDlgListener;
	}
	
	@SuppressLint("InflateParams")
	public SelectPopDlg(Context context) {
		super(LayoutInflater.from(context).inflate(R.layout.pop_select, null, false), LayoutParams.MATCH_PARENT,
				LayoutParams.WRAP_CONTENT);
		
		// 获取所有控件
		contentView = getContentView();
		
		titleTxt = (TextView) contentView.findViewById(R.id.textView_pop_select_title);
		bottomMsgTxt = (TextView) contentView.findViewById(R.id.textView_pop_select_bottom);
		listView = (ListView) contentView.findViewById(R.id.listView_pop_select);
		backBtn = (ImageButton) contentView.findViewById(R.id.imageButton_pop_select_back);
		
		// 初始化数据
		choiceAdapter = new ChoiceAdapter();
		listView.setAdapter(choiceAdapter);
		
		// 初始化监听
		backBtn.setOnClickListener(this);
		listView.setOnItemClickListener(this);
		
		// 初始化弹出窗口
		setOutsideTouchable(true);
		setFocusable(true);
		setBackgroundDrawable(new ColorDrawable());
		setAnimationStyle(R.style.MyWindowAnimPushTopStyle);// 设置动画
	}
	
	/* 接口：OnClickListener、OnItemClickListener、OnDismissListener */
	
	@Override
	public void onClick(View v) {
		int id = v.getId();
		switch (id) {
			case R.id.imageButton_pop_select_back:
				dismiss();
				break;
		}
	}
	
	@Override
	public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
		// 没有监听器的话就算了
		if (onSelectPopDlgListener == null) {
			return;
		}
		
		int checkedPosition = listView.getCheckedItemPosition();
		if (checkedPosition != ListView.INVALID_POSITION) {// 选中了什么
			ChoiceBean checkedChoice = choiceAdapter.getItem(checkedPosition);
			onSelectPopDlgListener.onSelectedChoice(this, checkedChoice, checkedPosition);
		}
	}
	
	/* 界面操作 */
	
	public void setTitle(CharSequence title) {
		titleTxt.setText(title);
	}
	
	public void setBottomMessage(CharSequence msg) {
		bottomMsgTxt.setText(msg);
	}
	
	/**
	 * 设置选项和默认选中位置
	 * 
	 * @param choices
	 * @param checkedPosition
	 *            为-1的时候表示不选中任何选项
	 */
	public void setChoices(List<ChoiceBean> choices, int checkedPosition) {
		choiceAdapter.clear();
		choiceAdapter.add(choices);
		choiceAdapter.notifyDataSetChanged();
		
		if (checkedPosition != -1) {
			listView.setItemChecked(checkedPosition, true);
		}
	}
	
	/* 显示 */
	
	public void show(View anchor) {
		showAtLocation(anchor, Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, 0);
	}
}