編輯:關於Android編程
自定義控件,點擊控件,展示城市列表,使用百度地圖定位當前城市,並且展示當前城市
代碼類
package com.example.test0504;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
import com.baidu.mapapi.SDKInitializer;
import com.baidu.mapapi.map.BaiduMap;
import com.baidu.mapapi.map.BitmapDescriptor;
import com.baidu.mapapi.map.BitmapDescriptorFactory;
import com.baidu.mapapi.map.MapStatus;
import com.baidu.mapapi.map.MapStatusUpdateFactory;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.map.MyLocationConfiguration;
import com.baidu.mapapi.map.MyLocationData;
import com.baidu.mapapi.map.MyLocationConfiguration.LocationMode;
import com.baidu.mapapi.model.LatLng;
import com.example.adapter.MyAdapter;
import com.example.test0504.MainActivity.MyLocationListenner;
/**
*
* 定義城市頁面
* @author 淺議愛
*
*/
public class CityActivity extends Activity implements
MySideBar.OnTouchingLetterChangedListener {
//定義控件
MapView mMapView = null;
// 定位相關
LocationClient mLocClient;
//配置定位圖層顯示方式
private LocationMode mCurrentMode;
BitmapDescriptor mCurrentMarker;
//定義 BaiduMap 地圖對象的操作方法與接口
BaiduMap mBaiduMap;
boolean isFirstLoc = true; // 是否首次定位
public MyLocationListenner myListener = new MyLocationListenner();
private String city;
private ListView mainList;
/** 數據源 */
private List data;
/** 字母位置 */
private List letterPositionList;
/** 字母Char */
private List letterCharList;
private MySideBar myView;
private TextView tv01;
private String[] title = {"GPS定位城市", "熱門城市", "A", "B", "C", "D", "E", "F", "G", "H",
"I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U",
"V", "W", "X", "Y", "Z" };
private int lastFirstVisibleItem;
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
SDKInitializer.initialize(getApplicationContext());
setContentView(R.layout.city_activity);
//或得上一個頁面傳遞過來的城市名稱(這裡指的是當前定位的城市名)
// Intent it=getIntent();
// final String tv=(String) it.getSerializableExtra("city");
mMapView=(MapView) findViewById(R.id.bmapView);
mLocClient = new LocationClient(this);
mLocClient.registerLocationListener(myListener);
mBaiduMap=mMapView.getMap();
// 開啟定位圖層
mBaiduMap.setMyLocationEnabled(true);
mCurrentMode = LocationMode.NORMAL;
mCurrentMarker = BitmapDescriptorFactory.fromResource(R.drawable.icon_geo);
mBaiduMap.setMyLocationConfigeration(new MyLocationConfiguration(
mCurrentMode, true, mCurrentMarker));
LocationClientOption option = new LocationClientOption();
option.setOpenGps(true); //打開gps
option.setCoorType("bd09ll"); // 設置坐標類型
option.setScanSpan(1000);
//設置定位完成後需要返回地址
option.setIsNeedAddress(true);
//設置定位完成後需要的定位描述
option.setIsNeedLocationDescribe(true);
mLocClient.setLocOption(option);
mLocClient.start();
mainList = (ListView) findViewById(R.id.mainlist);
myView = (MySideBar) findViewById(R.id.myview);
tv01 = (TextView) findViewById(R.id.main_tv01);
myView.setOnTouchingLetterChangedListener(this);
data = new ArrayList();
letterCharList = new ArrayList();
letterPositionList = new ArrayList();
int index = 0, position = 0;
letterCharList.add(index);
for (int i = 0; i < ary.length; i++) {
for (int j = 0; j < ary[i].length; j++) {
if (i == 0 && j == 0) {
index++;
letterPositionList.add(position);
} else if (j == 0) {
letterCharList.add(index);
letterPositionList.add(position);
index++;
} else {
letterCharList.add(-1);
}
position++;
data.add(ary[i][j]);
}
}
MyAdapter adapter = new MyAdapter(this, data, letterCharList, title);
mainList.setAdapter(adapter);
mainList.setOnScrollListener(new OnScrollListener() {
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
if (letterCharList.get(firstVisibleItem) >= 0) {
// tv01.setText(title[letterCharList.get(firstVisibleItem)]);
tv01.setText("當前城市"+city);//設置值
lastFirstVisibleItem = firstVisibleItem;
} else {
if (lastFirstVisibleItem > firstVisibleItem) {
// tv01.setText(title[letterCharList
// .get(lastFirstVisibleItem) - 1]);
tv01.setText("當前城市"+city);//設置值
}
}
}
});
//點擊item項,轉換成要定位的城市
mainList.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView parent, View view,
int position, long id) {
// Toast.makeText(getApplicationContext(), mainList.getItemAtPosition(position)+"我被點擊了。。。", 0).show();
Toast.makeText(getApplicationContext(), "當前城市"+mainList.getItemAtPosition(position),0).show();
tv01.setText((CharSequence) mainList.getItemAtPosition(position));//將城市定位的位置換成點擊的城市
}
});
}
public void onTouchingLetterChanged(int s) {
mainList.setSelection(letterPositionList.get(s));
}
/** 數據源二維數組 */
private String[][] ary = {
// {"正在定位..."},
// 熱門城市
{ "北京", "上海", "石家莊", "昆明", "杭州", "廣州", "成都", "西安", "南京", "深圳",
"重慶", "長沙", "沈陽", "廈門", "武漢", "海口", "烏魯木齊", "青島", "大連",
"三亞", "哈爾濱", "長春", "南寧", "貴陽", "福州", "鄭州", "濟南", "桂林",
"天津", "太原", "南昌" },
// A
{ "鞍山市", "安慶市", "安陽市", "阿壩藏族羌族自治州", "安順市", "安康市", "阿裡地區", "阿勒泰地區",
"阿克蘇地區", "阿拉爾市", "阿拉善盟", "澳門特別行政區" },
// B
{ "北京市", "保定市", "本溪市", "白城市", "白山市", "蚌埠市", "亳州市", "濱州市", "白銀市",
"巴中市", "畢節地區", "白沙黎族自治縣", "保亭黎族苗族自治縣", "保山市", "寶雞市", "百色市",
"北海市", "博爾塔拉蒙古自治州", "巴音郭楞蒙古自治州", "包頭市", "巴彥淖爾市" },
// C
{ "長沙市", "承德市", "滄州市", "朝陽市", "常州市", "滁州市", "巢湖市", "池州市", "郴州市",
"常德市", "潮州市", "成都市", "澄邁縣", "昌江黎族自治縣", "楚雄彝族自治州", "崇左市",
"昌都地區", "昌吉回族自治州", "赤峰市" },
// D
{ "大同市", "大連市", "丹東市", "大興安嶺地區", "大慶市", "德州市", "東營市", "東莞市", "定西市",
"達州市", "德陽市", "儋州市", "東方市", "定安縣", "德宏傣族景頗族自治州", "大理白族自治州",
"迪慶藏族自治州" },
// E
{ "恩施市", "鄂州市", "鄂爾多斯市" },
// F
{ "撫順市", "阜新市", "阜陽市", "福州市", "撫州市", "佛山市", "防城港市" },
// G
{ "贛州市", "廣州市", "甘南藏族自治州", "廣安市", "甘孜藏族自治州", "廣元市", "貴陽市",
"果洛藏族自治州", "桂林市", "貴港市", "固原市", "高雄市" },
// H
{ "衡水市", "呼和浩特市", "呼倫貝爾市", "和田地區", "哈密地區", "河池市", "賀州市", "漢中市",
"海西蒙古族藏族自治州", "邯鄲市", "海南藏族自治州", "黃南藏族自治州", "海東地區",
"海北藏族自治州", "紅河哈尼族彝族自治州", "海口市", "河源市", "惠州市", "懷化市", "衡陽市",
"黃石市", "黃岡市", "鶴壁市", "菏澤市", "黃山市", "淮北市", "淮南市", "合肥市",
"湖州市", "杭州市", "淮安市", "黑河市", "鶴崗市", "哈爾濱市", "葫蘆島市" },
// I
{ "暫無" },
// J
{ "嘉義市", "基隆市", "酒泉市", "嘉峪關市", "金昌市", "江門市", "揭陽市", "荊門市", "荊州市",
"焦作市", "濟源市", "濟寧市", "濟南市", "景德鎮市", "吉安市", "九江市", "金華市",
"嘉興市", "佳木斯市", "雞西市", "吉林市", "錦州市", "晉城市", "晉中市" },
// K
{ "開封市", "昆明市", "克孜勒蘇柯爾克孜自治州", "克拉瑪依市", "喀什地區" },
// L
{ "林芝地區", "拉薩市", "柳州市", "來賓市", "麗江市", "臨滄市", "陵水黎族自治縣", "樂東黎族自治縣",
"臨高縣", "六盤水市", "涼山彝族自治州", "樂山市", "泸州市", "臨夏回族自治州", "隴南市",
"蘭州市", "婁底市", "漯河市", "洛陽市", "聊城市", "萊蕪市", "臨沂市", "龍巖市",
"六安市", "麗水市", "連雲港市", "遼源市", "遼陽市", "呂梁市", "臨汾市", "廊坊市" },
// M
{ "牡丹江市", "馬鞍山市", "茂名市", "梅州市", "綿陽市", "眉山市" },
// N
{ "南京市", "南通市", "寧波市", "寧德市", "南平市", "南昌市", "南陽市", "南充市", "內江市",
"怒江傈傈族自治州", "南寧市", "那曲地區" },
// O
{ "暫無" },
// P
{ "盤錦市", "莆田市", "萍鄉市", "平頂山市", "濮陽市", "平涼市", "攀枝花市", "普洱市" },
// Q
{ "秦皇島市", "齊齊哈爾市", "七台河市", "衢州市", "泉州市", "青島市", "潛江市", "清遠市",
"慶陽市", "黔南布依族苗族自治州", "黔東南苗族侗族自治州", "黔西南布依族苗族自治州", "瓊海市",
"瓊中黎族苗族自治縣", "曲靖市", "欽州市" },
// R
{ "日照市", "日喀則地區" },
// S
{ "上海市", "石家莊市", "朔州市", "沈陽市", "四平市", "松原市", "雙鴨山市", "綏化市", "蘇州市",
"宿遷市", "紹興市", "宿州市", "廈門市", "三明市", "上饒市", "商丘市", "三門峽市",
"神農架林區", "十堰市", "隨州市", "邵陽市", "汕尾市", "韶關市", "汕頭市", "深圳市",
"遂寧市", "三亞市", "商洛市", "山南地區", "石嘴山市", "石河子市" },
// T
{ "天津市", "唐山市", "太原市", "鐵嶺市", "通化市", "泰州市", "台州市", "銅陵市", "泰安市",
"天門市", "天水市", "銅仁地區", "屯昌縣", "銅川市", "塔城地區", "吐魯番地區",
"圖木舒克市", "通遼市", "台北市", "台中市", "台南市" },
// U
{ "暫無" },
// V
{ "暫無" },
// W
{ "無錫市", "溫州市", "蕪湖市", "濰坊市", "威海市", "武漢市", "武威市", "五指山市", "文昌市",
"萬寧市", "文山壯族苗族自治州", "渭南市", "梧州市", "吳忠市", "烏魯木齊市", "五家渠市",
"烏海市", "烏蘭察布市" },
// X
{ "邢台市", "忻州市", "徐州市", "宣城市", "新余市", "新鄉市", "許昌市", "信陽市", "襄陽市",
"孝感市", "鹹寧市", "仙桃市", "湘潭市", "湘西土家族苗族自治州", "西雙版納傣族自治州",
"西寧市", "西安市", "鹹陽市", "錫林郭勒盟", "興安盟", "新竹市", "香港特別行政區" },
// Y
{ "陽泉市", "運城市", "營口市", "延邊朝鮮族自治州", "伊春市", "揚州市", "鹽城市", "鷹潭市",
"宜春市", "煙台市", "宜昌市", "岳陽市", "益陽市", "永州市", "陽江市", "雲浮市",
"宜賓市", "雅安市", "玉溪市", "玉樹藏族自治州", "延安市", "榆林市", "玉林市", "銀川市",
"伊犁哈薩克自治州" },
// Z
{ "重慶市", "張家口市", "長治市", "長春市", "鎮江市", "舟山市", "漳州市", "淄博市", "棗莊市",
"鄭州市", "周口市", "駐馬店市", "株洲市", "張家界市", "珠海市", "肇慶市", "湛江市",
"中山市", "張掖市", "自貢市", "資陽市", "遵義市", "昭通市", "中衛市" } };
public class MyLocationListenner implements BDLocationListener {
@Override
public void onReceiveLocation(BDLocation location) {
// map view 銷毀後不在處理新接收的位置
if (location == null || mMapView == null) {
return;
}
// tv_map.setText("[我的位置]\n" + location.getStreet());
MyLocationData locData = new MyLocationData.Builder()
.accuracy(location.getRadius())
// 此處設置開發者獲取到的方向信息,順時針0-360
.direction(100).latitude(location.getLatitude())
.longitude(location.getLongitude()).build();
//定位當前城市
city=location.getCity();
tv01.setText(city);//將當前定位的城市設置給textview
mBaiduMap.setMyLocationData(locData);
if (isFirstLoc) {
isFirstLoc = false;
LatLng ll = new LatLng(location.getLatitude(),
location.getLongitude());
MapStatus.Builder builder = new MapStatus.Builder();
builder.target(ll).zoom(18.0f);
mBaiduMap.animateMapStatus(MapStatusUpdateFactory.newMapStatus(builder.build()));
}
}
public void onReceivePoi(BDLocation poiLocation) {
}
}
@Override
protected void onDestroy() {
super.onDestroy();
// 在activity執行onDestroy時執行mMapView.onDestroy(),實現地圖生命周期管理
mLocClient.stop();
//定位層關閉
mBaiduMap.setMyLocationEnabled(false);
}
@Override
protected void onResume() {
super.onResume();
// 在activity執行onResume時執行mMapView. onResume (),實現地圖生命周期管理
mMapView.onResume();
}
@Override
protected void onPause() {
super.onPause();
// 在activity執行onPause時執行mMapView. onPause (),實現地圖生命周期管理
mMapView.onPause();
}
}
布局文件
<framelayout android:background="#ffffff" android:layout_height="fill_parent" android:layout_width="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android">
</framelayout>
自定義view
package com.example.test0504;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
public class MySideBar extends View{
OnTouchingLetterChangedListener onTouchingLetterChangedListener;
// 按住改變背景色
private boolean showBkg;
public static String[] b = { "定","熱", "A", "B", "C", "D", "E", "F", "G", "H",
"I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U",
"V", "W", "X", "Y", "Z" };
/**被選中位置*/
int choose = -1;
private Paint paint = new Paint();
public MySideBar(Context context) {
super(context);
}
public MySideBar(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public MySideBar(Context context, AttributeSet attrs) {
super(context, attrs);
}
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if(showBkg){
canvas.drawColor(Color.parseColor("#ccddFF"));
}
float height = getHeight();
float width = getWidth();
// 計算單個字母高度
float singleHeight = height / (float)(b.length);
for(int i = 0; i < b.length; i++ ){
paint.setColor(Color.BLACK);
paint.setTextSize(20);
if (i == choose) {
// 選中的顏色
paint.setColor(Color.parseColor("#3399ff"));
// 加粗
paint.setFakeBoldText(true);
}
// 設置文本坐標
float xPos = width / 2 - paint.measureText(b[i]) / 2;
float yPos = singleHeight * i + singleHeight;
canvas.drawText(b[i], xPos, yPos, paint);
paint.reset();
}
}
public boolean dispatchTouchEvent(MotionEvent event) {
int action = event.getAction();
float y = event.getY();
final int oldChoose = choose;
final int c = (int) (y / getHeight() * b.length);
final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener;
switch (action) {
case MotionEvent.ACTION_DOWN:
showBkg = true;
if (oldChoose != c && listener != null) {
if (c >= 0 && c < b.length) {
listener.onTouchingLetterChanged(c);
choose = c;
invalidate();
}
}
break;
case MotionEvent.ACTION_MOVE:
if (oldChoose != c && listener != null) {
if (c >= 0 && c < b.length) {
listener.onTouchingLetterChanged(c);
choose = c;
invalidate();
}
}
break;
case MotionEvent.ACTION_UP:
showBkg = false;
choose = -1;
invalidate();
break;
}
return true;
}
public void setOnTouchingLetterChangedListener(
OnTouchingLetterChangedListener onTouchingLetterChangedListener) {
this.onTouchingLetterChangedListener = onTouchingLetterChangedListener;
}
public interface OnTouchingLetterChangedListener {
public void onTouchingLetterChanged(int s);
}
}
配置文件 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.test0504" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="14" /> <!-- 這個權限用於進行網絡定位--> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission> <!-- 這個權限用於訪問GPS定位--> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission> <!-- 用於訪問wifi網絡信息,wifi信息會用於進行網絡定位--> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission> <!-- 獲取運營商信息,用於支持提供運營商信息相關的接口--> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"></uses-permission> <!-- 這個權限用於獲取wifi的獲取權限,wifi信息會用來進行網絡定位--> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission> <!-- 用於讀取手機當前的狀態--> <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission> <!-- 寫入擴展存儲,向擴展卡寫入數據,用於寫入離線定位數據--> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission> <!-- 訪問網絡,網絡定位需要上網--> <uses-permission android:name="android.permission.INTERNET" /> <!-- SD卡讀取權限,用戶寫入離線定位數據--> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"></uses-permission> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".CityActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <service android:name="com.baidu.location.f" android:enabled="true" android:process=":remote" > </service> <meta-data android:name="com.baidu.lbsapi.API_KEY" android:value="ZVqLlEhHMY8LSzD4GpK8gezEuP0CCDgs" /> </application> </manifest> 布局文件 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <TextView android:id="@+id/mainlist_item_tv01" android:layout_width="fill_parent" android:layout_height="30dp" android:background="#F0F0F0" android:gravity="center_vertical" android:paddingLeft="10dp" android:textColor="#ff55bb22" android:text="test" android:textSize="20sp" /> <TextView android:id="@+id/mainlist_item_tv02" android:layout_width="fill_parent" android:layout_height="40dp" android:gravity="center_vertical" android:paddingLeft="10dp" android:text="test" android:textSize="20dip" /> </LinearLayout>
繼前一篇文章講到Android上的SQLite分頁讀取,其功能只是用文本框顯示數據而已。本文就講得更加深入些,實現並封裝一個SQL分頁表格控件,不僅支持分頁還是以表格的形
前言這篇文章主要介紹多種方式實現主界面的tab,包括:(1)使用Fragment實現(2)使用ViewPage實現(3)使用ViewPage+FragmentPageAd
硬件工作原理觸摸屏的工作原理概括來說就是上報坐標值,X軸、Y軸的值。所以在 Linux 中是采用 input 子系統來對其進行實現。本文主要歸納其驅動基本原理 與 And
在使用Jni之前,我們需要對android studio進行一些配置:有網的時候:在設置 - plugin - Android NDK Support 勾選--insta