沒有太多時間,直接上控制元件原始碼吧,直接從github上也可以找到,有很重量級的.包括三級聯動的,全國省市,時間選擇(貌似時間選擇的用自帶的 datepicker還是很不錯的哦)

package com.example.administrator.myapplication;

import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.util.Log;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.ScrollView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

/**
* Author: wangjie
* Email: [email protected]
* Date: 7/1/14.
*/
public class WheelView extends ScrollView {
public static final String TAG = WheelView.class.getSimpleName();

public static class OnWheelViewListener {
    public void onSelected(int selectedIndex, String item) {
    }
}


private Context context;
 

// private ScrollView scrollView;

private LinearLayout views;

public WheelView(Context context) {
    super(context);
    init(context);
}

public WheelView(Context context, AttributeSet attrs) {
    super(context, attrs);
    init(context);
}

public WheelView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    init(context);
}

//    String[] items;
List<String> items;

private List<String> getItems() {
    return items;
}

public void setItems(List<String> list) {
    if (null == items) {
        items = new ArrayList<String>();
    }
    items.clear();
    items.addAll(list);

    // 前面和後面補全
    for (int i = 0; i < offset; i++) {
        items.add(0, "");
        items.add("");
    }

    initData();

}


public static final int OFF_SET_DEFAULT = 1;
int offset = OFF_SET_DEFAULT; // 偏移量（需要在最前面和最後面補全）

public int getOffset() {
    return offset;
}

public void setOffset(int offset) {
    this.offset = offset;
}

int displayItemCount; // 每頁顯示的數量

int selectedIndex = 1;


private void init(Context context) {
    this.context = context;
 

// scrollView = ((ScrollView)this.getParent());
// Log.d(TAG, “scrollview: ” + scrollView);
Log.d(TAG, “parent: ” + this.getParent());
// this.setOrientation(VERTICAL);
this.setVerticalScrollBarEnabled(false);

    views = new LinearLayout(context);
    views.setOrientation(LinearLayout.VERTICAL);
    this.addView(views);

    scrollerTask = new Runnable() {

        public void run() {

            int newY = getScrollY();
            if (initialY - newY == 0) { // stopped
                final int remainder = initialY % itemHeight;
                final int divided = initialY / itemHeight;

// Log.d(TAG, “initialY: ” + initialY);
// Log.d(TAG, “remainder: ” + remainder + “, divided: ” + divided);
if (remainder == 0) {
selectedIndex = divided + offset;

                    onSeletedCallBack();
                } else {
                    if (remainder > itemHeight / 2) {
                        WheelView.this.post(new Runnable() {
                            @Override
                            public void run() {
                                WheelView.this.smoothScrollTo(0, initialY - remainder + itemHeight);
                                selectedIndex = divided + offset + 1;
                                onSeletedCallBack();
                            }
                        });
                    } else {
                        WheelView.this.post(new Runnable() {
                            @Override
                            public void run() {
                                WheelView.this.smoothScrollTo(0, initialY - remainder);
                                selectedIndex = divided + offset;
                                onSeletedCallBack();
                            }
                        });
                    }


                }


            } else {
                initialY = getScrollY();
                WheelView.this.postDelayed(scrollerTask, newCheck);
            }
        }
    };


}

int initialY;

Runnable scrollerTask;
int newCheck = 50;

public void startScrollerTask() {

    initialY = getScrollY();
    this.postDelayed(scrollerTask, newCheck);
}

private void initData() {
    displayItemCount = offset * 2 + 1;

    for (String item : items) {
        views.addView(createView(item));
    }

    refreshItemView(0);
}

int itemHeight = 0;

private TextView createView(String item) {
    TextView tv = new TextView(context);
    tv.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
    tv.setSingleLine(true);
    tv.setTextSize(TypedValue.COMPLEX_UNIT_SP, 20);
    tv.setText(item);
    tv.setGravity(Gravity.CENTER);
    int padding = dip2px(15);
    tv.setPadding(padding, padding, padding, padding);
    if (0 == itemHeight) {
        itemHeight = getViewMeasuredHeight(tv);
        Log.d(TAG, "itemHeight: " + itemHeight);
        views.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, itemHeight * displayItemCount));
        LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) this.getLayoutParams();
        this.setLayoutParams(new LinearLayout.LayoutParams(lp.width, itemHeight * displayItemCount));
    }
    return tv;
}


@Override
protected void onScrollChanged(int l, int t, int oldl, int oldt) {
    super.onScrollChanged(l, t, oldl, oldt);

// Log.d(TAG, “l: ” + l + “, t: ” + t + “, oldl: ” + oldl + “, oldt: ” + oldt);

// try {
// Field field = ScrollView.class.getDeclaredField(“mScroller”);
// field.setAccessible(true);
// OverScroller mScroller = (OverScroller) field.get(this);
//
//
// if(mScroller.isFinished()){
// Log.d(TAG, “isFinished…”);
// }
//
// } catch (Exception e) {
// e.printStackTrace();
// }

    refreshItemView(t);

    if (t > oldt) {

// Log.d(TAG, “向下滾動”);
scrollDirection = SCROLL_DIRECTION_DOWN;
} else {
// Log.d(TAG, “向上滾動”);
scrollDirection = SCROLL_DIRECTION_UP;

    }


}

private void refreshItemView(int y) {
    int position = y / itemHeight + offset;
    int remainder = y % itemHeight;
    int divided = y / itemHeight;

    if (remainder == 0) {
        position = divided + offset;
    } else {
        if (remainder > itemHeight / 2) {
            position = divided + offset + 1;
        }

// if(remainder > itemHeight / 2){
// if(scrollDirection == SCROLL_DIRECTION_DOWN){
// position = divided + offset;
// Log.d(TAG, “>down…position: ” + position);
// }else if(scrollDirection == SCROLL_DIRECTION_UP){
// position = divided + offset + 1;
// Log.d(TAG, “>up…position: ” + position);
// }
// }else{
//// position = y / itemHeight + offset;
// if(scrollDirection == SCROLL_DIRECTION_DOWN){
// position = divided + offset;
// Log.d(TAG, “