好用的城市選擇（三級聯動）

2019-11-06 09:57:27

字體：大中小

來源：轉載

供稿：網友

最近公司項目中用到了關于收貨地址的功能，所以就根據實際情況剖析一下我做的三級聯動，也算是總結和回顧吧。

說起三級聯動肯定都不陌生，因為現在很多項目中都會有應用，比如淘寶、京東、美團、餓了么等等，這些都有，我項目中做的其實就是和淘寶的差不多當然我們都叫做仿淘寶項目。廢話不多說了下面就直接上代碼，根據代碼來分析具體的用法，我們主要貼出來一些關鍵代碼。源碼地址： http://download.csdn.net/detail/army_jun/9765371

一、首先地址頁面

package myaddressselector.myaddressselector;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;import myaddressselector.myaddressselector.callback.SelectAddressInterface;import myaddressselector.myaddressselector.view.AddressDialog;import myaddressselector.myaddressselector.view.AddressSelectorDialog;import myaddressselector.myaddressselector.view.SettingItemView;public class AddAddressActivity extends AppCompatActivity implements SelectAddressInterface { EditText mConsignee; SettingItemView mSivAddress; EditText mDetailsAddress; EditText mPostcode; EditText mPhoneNum; TextView mAddressSave; PRivate AddressSelectorDialog addressSelectorDialog; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_add_address); initView(); } private void initView() { mConsignee = (EditText) findViewById(R.id.consignee); mSivAddress = (SettingItemView) findViewById(R.id.siv_address); mDetailsAddress = (EditText) findViewById(R.id.details_address); mPostcode = (EditText) findViewById(R.id.postcode); mPhoneNum = (EditText) findViewById(R.id.phoneNum); mAddressSave = (TextView) findViewById(R.id.address_save); addAddressAreaData(); mAddressSave.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(AddAddressActivity.this, "已經保存了地址", Toast.LENGTH_SHORT).show(); } }); } private void addAddressAreaData() { mSivAddress.setItemT可以看到這個activity實現了一個接口，這個接口就是通過回調可以拿到的選擇后的城市數據，使用接口目的就是能夠實時的監控并得到城市改變的數據。接口代碼 SelectAddressInterface

public interface SelectAddressInterface { /** * 用于地址選擇器完成選擇后更新最新的地址 * @param area */ void setAreaString(String area); void setAreaString(String currentProvinceName, String currentCityName, String currentDistrictName, String currentZipCode); void setAreaString(String currentProvinceName, String currentCityName);}

從上面activity可以看到我把地址三級聯動選擇封裝在了一個dialog里面也就是AddressSelectorDialog 這就相當于一個工具了無論放在那個項目都可以用，只需要new一下就ok了dialog的代碼如下

package myaddressselector.myaddressselector.view;import android.content.Context;import android.os.Bundle;import android.os.Handler;import android.os.Looper;import android.view.View;import android.widget.TextView;import java.util.ArrayList;import myaddressselector.myaddressselector.R;/** * Created by Army on 2017/2/24 */public class AddressSelectorDialog extends AddressDialog implements View.OnClickListener { private WheelView mViewProvince; private WheelView mViewCity; private WheelView mViewDistrict; private Context mContext; private TextView tvCancel; private TextView tvConfirm; protected boolean isDataLoaded = false; public AddressSelectorDialog(Context context, int themeResId) { super(context, themeResId); this.mContext = context; } public AddressSelectorDialog(Context context) { super(context); this.mContext = context; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.dialog_address); setUpViews(); setUpListener(); } private void setUpViews() { mViewProvince = (WheelView) findViewById(R.id.id_province); mViewCity = (WheelView) findViewById(R.id.id_city); mViewDistrict = (WheelView) findViewById(R.id.id_district); tvCancel = (TextView) findViewById(R.id.btn_cancel); tvConfirm = (TextView) findViewById(R.id.btn_confirm); initProvinceSelectView(); } private void setUpListener() { // 取消和確定 tvCancel.setOnClickListener(this); tvConfirm.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.btn_cancel: if (null != listener) { listener.onCanceled(); } break; case R.id.btn_confirm: if (null != listener) { listener.onConfirmed(mCurrentProvinceName, mCurrentCityName, mCurrentDistrictName, mCurrentZipCode); } break; default: break; } } private void initProvinceSelectView() { mViewProvince.setOnSelectListener(new WheelView.OnSelectListener() { @Override public void endSelect(int id, String text) { String provinceText = mProvinceDatas.get(id); if (!mCurrentProvinceName.equals(provinceText)) { mCurrentProvinceName = provinceText; ArrayList<String> mCityData = mCitisDatasMap.get(mCurrentProvinceName); mViewCity.resetData(mCityData); mViewCity.setDefault(0); mCurrentCityName = mCityData.get(0); ArrayList<String> mDistrictData = mDistrictDatasMap.get(mCurrentCityName); mViewDistrict.resetData(mDistrictData); mViewDistrict.setDefault(0); mCurrentDistrictName = mDistrictData.get(0); } mCurrentZipCode = mZipcodeDatasMap.get(mCurrentDistrictName); } @Override public void selecting(int id, String text) { } }); mViewCity.setOnSelectListener(new WheelView.OnSelectListener() { @Override public void endSelect(int id, String text) { ArrayList<String> mCityData = mCitisDatasMap.get(mCurrentProvinceName); String cityText = mCityData.get(id); if (!mCurrentCityName.equals(cityText)) { mCurrentCityName = cityText; ArrayList<String> mCountyData = mDistrictDatasMap.get(mCurrentCityName); mViewDistrict.resetData(mCountyData); mViewDistrict.setDefault(0); mCurrentDistrictName = mCountyData.get(0); } mCurrentZipCode = mZipcodeDatasMap.get(mCurrentDistrictName); } @Override public void selecting(int id, String text) { } }); mViewDistrict.setOnSelectListener(new WheelView.OnSelectListener() { @Override public void endSelect(int id, String text) { ArrayList<String> mDistrictData = mDistrictDatasMap.get(mCurrentCityName); String districtText = mDistrictData.get(id); if (!mCurrentDistrictName.equals(districtText)) { mCurrentDistrictName = districtText; } mCurrentZipCode = mZipcodeDatasMap.get(mCurrentDistrictName); } @Override public void selecting(int id, String text) { } }); getData(); } private void getData() { // 啟動線程讀取數據 new Thread() { @Override public void run() { // 讀取數據 isDataLoaded = initProvinceDatas(); // 通知界面線程 new Handler(Looper.getMainLooper()).post(new Runnable() { @Override public void run() { setDefaultData(); } }); } }.start(); } private void setDefaultData() { mViewProvince.setData(mProvinceDatas); mViewProvince.setDefault(0); mCurrentProvinceName = mProvinceDatas.get(0); ArrayList<String> mCityData = mCitisDatasMap.get(mCurrentProvinceName); mViewCity.setData(mCityData); mViewCity.setDefault(0); mCurrentCityName = mCityData.get(0); ArrayList<String> mDistrictData = mDistrictDatasMap.get(mCurrentCityName); mViewDistrict.setData(mDistrictData); mViewDistrict.setDefault(0); mCurrentDistrictName = mDistrictData.get(0); mCurrentZipCode = mZipcodeDatasMap.get(0); }}

二、數據來源

城市的數據來源其實就是解析的xml文件關于XML的解析，一共有SAX、PULL、DOM三種解析方式。

此次項目中使用的是SAX解析方式，因為它占用內存少，并且速度快，代碼如下

package myaddressselector.myaddressselector.service;import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;import java.util.ArrayList;import java.util.List;import myaddressselector.myaddressselector.bean.CityModel;import myaddressselector.myaddressselector.bean.DistrictModel;import myaddressselector.myaddressselector.bean.ProvinceModel;public class XmlParserHandler extends DefaultHandler { /** * 城市數據 */ private List<ProvinceModel> provinceList = new ArrayList<ProvinceModel>(); public XmlParserHandler() { } public List<ProvinceModel> getDataList() { return provinceList; } @Override public void startDocument() throws SAXException { } ProvinceModel provinceModel = new ProvinceModel(); CityModel cityModel = new CityModel(); DistrictModel districtModel = new DistrictModel(); @Override public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { if (qName.equals("province")) { provinceModel = new ProvinceModel(); provinceModel.setName(attributes.getValue(0)); provinceModel.setCityList(new ArrayList<CityModel>()); } else if (qName.equals("city")) { cityModel = new CityModel(); cityModel.setName(attributes.getValue(0)); cityModel.setDistrictList(new ArrayList<DistrictModel>()); } else if (qName.equals("district")) { districtModel = new DistrictModel(); districtModel.setName(attributes.getValue(0)); districtModel.setZipcode(attributes.getValue(1)); } } @Override public void endElement(String uri, String localName, String qName) throws SAXException { if (qName.equals("district")) { cityModel.getDistrictList().add(districtModel); } else if (qName.equals("city")) { provinceModel.getCityList().add(cityModel); } else if (qName.equals("province")) { provinceList.add(provinceModel); } } @Override public void characters(char[] ch, int start, int length) throws SAXException { }}

三、造輪子

和前面的封裝一樣，這次輪子造好了以后就可以直接用了，自定義了一個滾動組件WheelView

package myaddressselector.myaddressselector.view;import android.annotation.SuppressLint;import android.content.Context;import android.content.res.TypedArray;import android.graphics.Canvas;import android.graphics.LinearGradient;import android.graphics.Paint;import android.graphics.Rect;import android.graphics.Shader.TileMode;import android.os.Handler;import android.os.Message;import android.text.TextPaint;import android.text.TextUtils;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import java.util.ArrayList;import myaddressselector.myaddressselector.R;/** * WheelView滾輪 * */public class WheelView extends View { /** * 控件寬度 */ private float controlWidth; /** * 控件高度 */ private float controlHeight; /** * 是否滑動中 */ private boolean isScrolling = false; /** * 選擇的內容 */ private ArrayList<ItemObject> itemList = new ArrayList<ItemObject>(); /** * 設置數據 */ private ArrayList<String> dataList = new ArrayList<String>(); /** * 按下的坐標 */ private int downY; /** * 按下的時間 */ private long downTime = 0; /** * 短促移動 */ private long goonTime = 200; /** * 短促移動距離 */ private int goonDistence = 100; /** * 畫線畫筆 */ private Paint linePaint; /** * 線的默認顏色 */ private int lineColor = 0xff000000; /** * 線的默認寬度 */ private float lineWidth = 2f; /** * 默認字體 */ private float normalFont = 14.0f; /** * 選中的時候字體 */ private float selectedFont = 22.0f; /** * 單元格高度 */ private int unitHeight = 50; /** * 顯示多少個內容 */ private int itemNumber = 7; /** * 默認字體顏色 */ private int normalColor = 0xff000000; /** * 選中時候的字體顏色 */ private int selectedColor = 0xffff0000; /** * 蒙板高度 */ private float maskHight = 48.0f; /** * 選擇監聽 */ private OnSelectListener onSelectListener; /** * 是否可用 */ private boolean isEnable = true; /** * 刷新界面 */ private static final int REFRESH_VIEW = 0x001; /** * 移動距離 */ private static final int MOVE_NUMBER = 5; /** * 是否允許選空 */ private boolean noEmpty = true; /** * 正在修改數據，避免ConcurrentModificationException異常 */ private boolean isClearing = false; public WheelView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(context, attrs); initData(); } public WheelView(Context context, AttributeSet attrs) { super(context, attrs); init(context, attrs); initData(); } public WheelView(Context context) { super(context); initData(); } @Override public boolean onTouchEvent(MotionEvent event) { if (!isEnable) return true; int y = (int) event.getY(); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: isScrolling = true; downY = (int) event.getY(); downTime = System.currentTimeMillis(); break; case MotionEvent.ACTION_MOVE: actionMove(y - downY); onSelectListener(); break; case MotionEvent.ACTION_UP: int move = Math.abs(y - downY); // 判斷段時間移動的距離 if (System.currentTimeMillis() - downTime < goonTime && move > goonDistence) { goonMove(y - downY); } else { actionUp(y - downY); } noEmpty(); isScrolling = false; break; default: break; } return true; } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); drawLine(canvas); drawList(canvas); drawMask(canvas); } private synchronized void drawList(Canvas canvas) { if (isClearing) return; try { for (ItemObject itemObject : itemList) { itemObject.drawSelf(canvas, getMeasuredWidth()); } } catch (Exception e) { } } @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) { super.onLayout(changed, left, top, right, bottom); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); controlWidth = getWidth(); if (controlWidth != 0) { setMeasuredDimension(getWidth(), itemNumber * unitHeight); controlWidth = getWidth(); } } /** * 繼續移動一定距離 */ private synchronized void goonMove(final int move) { new Thread(new Runnable() { @Override public void run() { int distence = 0; while (distence < unitHeight * MOVE_NUMBER) { try { Thread.sleep(5); } catch (InterruptedException e) { e.printStackTrace(); } actionThreadMove(move > 0 ? distence : distence * (-1)); distence += 10; } actionUp(move > 0 ? distence - 10 : distence * (-1) + 10); noEmpty(); } }).start(); } /** * 不能為空，必須有選項 */ private void noEmpty() { if (!noEmpty) return; for (ItemObject item : itemList) { if (item.isSelected()) return; } int move = (int) itemList.get(0).moveToSelected(); if (move < 0) { defaultMove(move); } else { defaultMove((int) itemList.get(itemList.size() - 1) .moveToSelected()); } for (ItemObject item : itemList) { if (item.isSelected()) { if (onSelectListener != null) onSelectListener.endSelect(item.id, item.itemText); break; } } } /** * 初始化數據 */ private void initData() { isClearing = true; itemList.clear(); for (int i = 0; i < dataList.size(); i++) { ItemObject itmItemObject = new ItemObject(); itmItemObject.id = i; itmItemObject.itemText = dataList.get(i); itmItemObject.x = 0; itmItemObject.y = i * unitHeight; itemList.add(itmItemObject); } isClearing = false; } /** * 移動的時候 * * @param move */ private void actionMove(int move) { for (ItemObject item : itemList) { item.move(move); } invalidate(); } /** * 移動，線程中調用 * * @param move */ private void actionThreadMove(int move) { for (ItemObject item : itemList) { item.move(move); } Message rMessage = new Message(); rMessage.what = REFRESH_VIEW; handler.sendMessage(rMessage); } /** * 松開的時候 * * @param move */ private void actionUp(int move) { int newMove = 0; if (move > 0) { for (int i = 0; i < itemList.size(); i++) { if (itemList.get(i).isSelected()) { newMove = (int) itemList.get(i).moveToSelected(); if (onSelectListener != null) onSelectListener.endSelect(itemList.get(i).id, itemList.get(i).itemText); break; } } } else { for (int i = itemList.size() - 1; i >= 0; i--) { if (itemList.get(i).isSelected()) { newMove = (int) itemList.get(i).moveToSelected(); if (onSelectListener != null) onSelectListener.endSelect(itemList.get(i).id, itemList.get(i).itemText); break; } } } for (ItemObject item : itemList) { item.newY(move + 0); } slowMove(newMove); Message rMessage = new Message(); rMessage.what = REFRESH_VIEW; handler.sendMessage(rMessage); } /** * 緩慢移動 * * @param move */ private synchronized void slowMove(final int move) { new Thread(new Runnable() { @Override public void run() { // 判斷政府 int m = move > 0 ? move : move * (-1); int i = move > 0 ? 1 : (-1); // 移動速度 int speed = 1; while (true) { m = m - speed; if (m <= 0) { for (ItemObject item : itemList) { item.newY(m * i); } Message rMessage = new Message(); rMessage.what = REFRESH_VIEW; handler.sendMessage(rMessage); try { Thread.sleep(2); } catch (InterruptedException e) { e.printStackTrace(); } break; } for (ItemObject item : itemList) { item.newY(speed * i); } Message rMessage = new Message(); rMessage.what = REFRESH_VIEW; handler.sendMessage(rMessage); try { Thread.sleep(2); } catch (InterruptedException e) { e.printStackTrace(); } } for (ItemObject item : itemList) { if (item.isSelected()) { if (onSelectListener != null) onSelectListener.endSelect(item.id, item.itemText); break; } } } }).start(); } /** * 移動到默認位置 * * @param move */ private void defaultMove(int move) { for (ItemObject item : itemList) { item.newY(move); } Message rMessage = new Message(); rMessage.what = REFRESH_VIEW; handler.sendMessage(rMessage); } /** * 滑動監聽 */ private void onSelectListener() { if (onSelectListener == null) return; for (ItemObject item : itemList) { if (item.isSelected()) { onSelectListener.selecting(item.id, item.itemText); } } } /** * 繪制線條 * * @param canvas */ private void drawLine(Canvas canvas) { if (linePaint == null) { linePaint = new Paint(); linePaint.setColor(lineColor); linePaint.setAntiAlias(true); linePaint.setStrokeWidth(lineWidth); } canvas.drawLine(0, controlHeight / 2 - unitHeight / 2 + 2, controlWidth, controlHeight / 2 - unitHeight / 2 + 2, linePaint); canvas.drawLine(0, controlHeight / 2 + unitHeight / 2 - 2, controlWidth, controlHeight / 2 + unitHeight / 2 - 2, linePaint); } /** * 繪制遮蓋板 * * @param canvas */ private void drawMask(Canvas canvas) { LinearGradient lg = new LinearGradient(0, 0, 0, maskHight, 0x00f2f2f2, 0x00f2f2f2, TileMode.MIRROR); Paint paint = new Paint(); paint.setShader(lg); canvas.drawRect(0, 0, controlWidth, maskHight, paint); LinearGradient lg2 = new LinearGradient(0, controlHeight - maskHight, 0, controlHeight, 0x00f2f2f2, 0x00f2f2f2, TileMode.MIRROR); Paint paint2 = new Paint(); paint2.setShader(lg2); canvas.drawRect(0, controlHeight - maskHight, controlWidth, controlHeight, paint2); } /** * 初始化，獲取設置的屬性 * * @param context * @param attrs */ private void init(Context context, AttributeSet attrs) { TypedArray attribute = context.obtainStyledAttributes(attrs, R.styleable.WheelView); unitHeight = (int) attribute.getDimension( R.styleable.WheelView_unitHight, 32); normalFont = attribute.getDimension( R.styleable.WheelView_normalTextSize, 14.0f); selectedFont = attribute.getDimension( R.styleable.WheelView_selectedTextSize, 22.0f); itemNumber = attribute.getInt(R.styleable.WheelView_itemNumber, 7); normalColor = attribute.getColor( R.styleable.WheelView_normalTextColor, 0xff000000); selectedColor = attribute.getColor( R.styleable.WheelView_selectedTextColor, 0xffff0000); lineColor = attribute.getColor(R.styleable.WheelView_lineColor, 0xff000000); lineWidth = attribute.getDimension(R.styleable.WheelView_lineHeight, 2f); maskHight = attribute.getDimension(R.styleable.WheelView_maskHight, 48.0f); noEmpty = attribute.getBoolean(R.styleable.WheelView_noEmpty, true); isEnable = attribute .getBoolean(R.styleable.WheelView_isEnable, true); attribute.recycle(); controlHeight = itemNumber * unitHeight; } /** * 設置數據（第一次） * * @param data */ public void setData(ArrayList<String> data) { this.dataList = data; initData(); } /** * 重置數據 * * @param data */ public void resetData(ArrayList<String> data) { setData(data); //invalidate(); postInvalidate(); } /** * 獲取返回項 id * * @return */ public int getSelected() { for (ItemObject item : itemList) { if (item.isSelected()) return item.id; } return -1; } /** * 獲取返回的內容 * * @return */ public String getSelectedText() { for (ItemObject item : itemList) { if (item.isSelected()) return item.itemText; } return ""; } /** * 是否正在滑動 * * @return */ public boolean isScrolling() { return isScrolling; } /** * 是否可用 * * @return */ public boolean isEnable() { return isEnable; } /** * 設置是否可用 * * @param isEnable */ public void setEnable(boolean isEnable) { this.isEnable = isEnable; } /** * 設置默認選項 * * @param index */ public void setDefault(int index) { if (index > itemList.size() - 1) return; float move = itemList.get(index).moveToSelected(); defaultMove((int) move); } /** * 獲取列表大小 * * @return */ public int getListSize() { if (itemList == null) return 0; return itemList.size(); } /** * 獲取某項的內容 * * @param index * @return */ public String getItemText(int index) { if (itemList == null) return ""; return itemList.get(index).itemText; } /** * 監聽 * * @param onSelectListener */ public void setOnSelectListener(OnSelectListener onSelectListener) { this.onSelectListener = onSelectListener; } @SuppressLint("HandlerLeak") Handler handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); switch (msg.what) { case REFRESH_VIEW: invalidate(); break; default: break; } } }; /** * 單條內容 * * @author JiangPing */ private class ItemObject { /** * id */ public int id = 0; /** * 內容 */ public String itemText = ""; /** * x坐標 */ public int x = 0; /** * y坐標 */ public int y = 0; /** * 移動距離 */ public int move = 0; /** * 字體畫筆 */ private TextPaint textPaint; /** * 字體范圍矩形 */ private Rect textRect; public ItemObject() { super(); } /** * 繪制自身 * * @param canvas 畫板 * @param containerWidth 容器寬度 */ public void drawSelf(Canvas canvas, int containerWidth) { if (textPaint == null) { textPaint = new TextPaint(); textPaint.setAntiAlias(true); } if (textRect == null) textRect = new Rect(); // 判斷是否被選擇 if (isSelected()) { textPaint.setColor(selectedColor); // 獲取距離標準位置的距離 float moveToSelect = moveToSelected(); moveToSelect = moveToSelect > 0 ? moveToSelect : moveToSelect * (-1); // 計算當前字體大小 float textSize = (float) normalFont + ((float) (selectedFont - normalFont) * (1.0f - (float) moveToSelect / (float) unitHeight)); textPaint.setTextSize(textSize); } else { textPaint.setColor(normalColor); textPaint.setTextSize(normalFont); } // 返回包圍整個字符串的最小的一個Rect區域 itemText = (String) TextUtils.ellipsize(itemText, textPaint, containerWidth, TextUtils.TruncateAt.END); textPaint.getTextBounds(itemText, 0, itemText.length(), textRect); // 判斷是否可視 if (!isInView()) return; // 繪制內容 canvas.drawText(itemText, x + controlWidth / 2 - textRect.width() / 2, y + move + unitHeight / 2 + textRect.height() / 2, textPaint); } /** * 是否在可視界面內 * * @return */ public boolean isInView() { if (y + move > controlHeight || (y + move + unitHeight / 2 + textRect.height() / 2) < 0) return false; return true; } /** * 移動距離 * * @param _move */ public void move(int _move) { this.move = _move; } /** * 設置新的坐標 * * @param _move */ public void newY(int _move) { this.move = 0; this.y = y + _move; } /** * 判斷是否在選擇區域內 * * @return */ public boolean isSelected() { if ((y + move) >= controlHeight / 2 - unitHeight / 2 + 2 && (y + move) <= controlHeight / 2 + unitHeight / 2 - 2) return true; if ((y + move + unitHeight) >= controlHeight / 2 - unitHeight / 2 + 2 && (y + move + unitHeight) <= controlHeight / 2 + unitHeight / 2 - 2) return true; if ((y + move) <= controlHeight / 2 - unitHeight / 2 + 2 && (y + move + unitHeight) >= controlHeight / 2 + unitHeight / 2 - 2) return true; return false; } /** * 獲取移動到標準位置需要的距離 */ public float moveToSelected() { return (controlHeight / 2 - unitHeight / 2) - (y + move); } } /** * 選擇監聽 * * @author JiangPing */ public interface OnSelectListener { /** * 結束選擇 * * @param id * @param text */ public void endSelect(int id, String text); /** * 選中的內容 * * @param id * @param text */ public void selecting(int id, String text); }}

這個自定義組件最大的好處是可以直接在布局文件中改變選擇和未選中的城市的字體大小和字體顏色非常方便這些自定義的屬性都在attr文件中

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@color/sc_white" android:orientation="vertical"> <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <TextView android:id="@+id/btn_cancel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="15dp" android:text="取消" android:textColor="@color/text_sub" android:textSize="@dimen/text_size_small" /> <TextView android:id="@+id/btn_confirm" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:padding="15dp" android:text="確定" android:textColor="@color/text_sub" android:textSize="@dimen/text_size_small" /> </RelativeLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"> <myaddressselector.myaddressselector.view.WheelView android:id="@+id/id_province" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" app:itemNumber="5" app:lineColor="#cccccc" app:lineHeight="1dp" app:maskHight="30dp" app:noEmpty="true" app:normalTextColor="#777" app:normalTextSize="16sp" app:selectedTextColor="#ff000000" app:selectedTextSize="22sp" app:unitHight="40dp"/> <myaddressselector.myaddressselector.view.WheelView android:id="@+id/id_city" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" app:itemNumber="5" app:lineColor="#cccccc" app:lineHeight="1dp" app:maskHight="30dp" app:noEmpty="true" app:normalTextColor="#777" app:normalTextSize="16sp" app:selectedTextColor="#ff000000" app:selectedTextSize="22sp" app:unitHight="40dp"/> <myaddressselector.myaddressselector.view.WheelView android:id="@+id/id_district" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" app:itemNumber="5" app:lineColor="#cccccc" app:lineHeight="1dp" app:maskHight="30dp" app:noEmpty="true" app:normalTextColor="#777" app:normalTextSize="16sp" app:selectedTextColor="#ff000000" app:selectedTextSize="22sp" app:unitHight="40dp"/> </LinearLayout></LinearLayout>

四、最后界面實現

) git地址：https://github.com/Army1990/AddressSelectorDemo 源碼地址：http://download.csdn.net/detail/army_jun/9765371