WheelPicker.java

package com.partynetwork.myview.wheelview;

import com.partynetwork.iparty.R;

import android.content.Context;
import android.graphics.drawable.ColorDrawable;
import android.os.Handler;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.PopupWindow;

public class WheelPicker extends PopupWindow {

	private View view;

	/** 左边的按钮 */
	private Button leftBtn;
	/** 右边的按钮 */
	private Button rightBtn;
	/** 第一个滚轮 */
	private WheelView firstWheel;
	/** 第二个滚轮 */
	private WheelView secondWheel;
	/** 第三个滚轮 */
	private WheelView thirdWheel;

	private Context mContext;
	
	private int whellNumber;
	private WheelAdapter wheelAdapter;
	private WheelListener wheelListener;

	public WheelPicker(Context context,final int whellNumber, WheelAdapter adapter,
			final WheelListener wheelListener) {
		super(context);
		mContext = context;
		this.whellNumber=whellNumber;
		this.wheelAdapter=adapter;
		this.wheelListener=wheelListener;
		view = LayoutInflater.from(context).inflate(R.layout.wheelview_three,
				null);
		initView();
		initWheel(); 	
		// 设置SelectPicPopupWindow的View
		setContentView(view);
		// 设置SelectPicPopupWindow弹出窗体的宽
		setWidth(LayoutParams.WRAP_CONTENT);
		// 设置SelectPicPopupWindow弹出窗体的高
		setHeight(LayoutParams.WRAP_CONTENT);
		// 设置SelectPicPopupWindow弹出窗体可点击
		setFocusable(true);
		// 设置SelectPicPopupWindow弹出窗体动画效果
		setAnimationStyle(R.style.AnimBottom);
		// 实例化一个ColorDrawable颜色为半透明
		ColorDrawable dw = new ColorDrawable(0x00000000);
		// 设置SelectPicPopupWindow弹出窗体的背景
		setBackgroundDrawable(dw);
	}

	private void initView() {
		leftBtn = (Button) view.findViewById(R.id.left_btn);
		rightBtn = (Button) view.findViewById(R.id.right_btn);
		firstWheel = (WheelView) view.findViewById(R.id.first_wheel);
		secondWheel = (WheelView) view.findViewById(R.id.second_wheel);
		thirdWheel = (WheelView) view.findViewById(R.id.third_wheel);
	}

	/**
	 * 初始化滚轮
	 * 
	 * @param wheelAdapter
	 */
	private void initWheel() {
		firstWheel.setAdapter(wheelAdapter);
		if (whellNumber == 1) {
			secondWheel.setVisibility(View.GONE);
			thirdWheel.setVisibility(View.GONE);
		} else if (whellNumber == 2) {
			firstWheel.addChangingListener(new OnWheelChangedListener() {
				public void onChanged(WheelView wheel, int oldValue,
						int newValue) {
					secondWheel.setAdapter(wheelListener.onChange(wheel,
							oldValue, newValue));
				}
			});
			// 选择第二项
			secondWheel.setVisibility(View.VISIBLE);
			thirdWheel.setVisibility(View.GONE);
		}
		firstWheel.setCurrentItem(3);
		// 事件监听
		rightBtn.setOnClickListener(new OnClickListener() {

			public void onClick(View arg0) {
				String text = "";
				if (whellNumber == 1) {
					text = firstWheel.getTextItem(firstWheel.getCurrentItem());
				} else if (whellNumber == 2) {
					text = firstWheel.getTextItem(firstWheel.getCurrentItem())
							+ "-"
							+ secondWheel.getTextItem(secondWheel
									.getCurrentItem());
				}
				wheelListener.confirm(text);
				if (isShowing()) {
					dismiss();
				}
			}
		});

		leftBtn.setOnClickListener(new OnClickListener() {

			public void onClick(View v) {
				wheelListener.cancel();
				if (isShowing()) {
					dismiss();
				}
			}
		});

//		view.startAnimation(AnimationUtils.loadAnimation(mContext,
//				R.anim.push_bottom_in));
	}

	public void showAt(View view) {
		showAtLocation(view, Gravity.BOTTOM, 0, 0);
	}

	/**
	 * 
	 * com.dongcemedia.myview.wheelview.WheelListener
	 * 
	 * @author 沈跃双 Create at 2014-1-9 下午3:24:55
	 */
	public interface WheelListener {
		/**
		 * 取消按钮
		 */
		public abstract void cancel();

		/**
		 * 确定按钮
		 * 
		 * @param str
		 */
		public abstract void confirm(String str);

		/**
		 * 两个滚轮时，第二个滚轮的适配器对象
		 * 
		 * @param wheel
		 * @param oldValue
		 * @param newValue
		 */
		public abstract WheelAdapter onChange(WheelView wheel, int oldValue,
				int newValue);
	}

}