Android实战--基于位置的服务（获取自己位置的经纬度+百度地图）

需要借助LocationManager类实现，下面直接看代码：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <TextView        android:id="@+id/edit"        android:layout_width="fill_parent"        android:layout_height="wrap_content" /></LinearLayout>

.java代码如下：

package org.lxh.demo;import java.util.List;import android.app.Activity;import android.content.Context;import android.location.Location;import android.location.LocationListener;import android.location.LocationManager;import android.os.Bundle;import android.util.Log;import android.widget.TextView;import android.widget.Toast;public class Hello extends Activity {private TextView textView;private LocationManager locationManager;private String provider;public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState); // 生命周期方法super.setContentView(R.layout.main); // 设置要使用的布局管理器Log.d("111111", "4444444");textView = (TextView) findViewById(R.id.edit);locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);List<String> providerList = locationManager.getProviders(true);// 获取所有可用的位置提供器if (providerList.contains(LocationManager.GPS_PROVIDER)) {provider = LocationManager.GPS_PROVIDER;} else if (providerList.contains(LocationManager.NETWORK_PROVIDER)) {provider = LocationManager.NETWORK_PROVIDER;Log.d("111111", "3333333");} else {Toast.makeText(this, "No location provider to use!",Toast.LENGTH_SHORT).show();return;}Location location = locationManager.getLastKnownLocation(provider);if (location != null) {showLocation(location);}locationManager.requestLocationUpdates(provider, 5000, 1,locationListener);}private void showLocation(Location location) {String crrrentPositionString = "latitude is" + location.getLatitude()+ "\n" + "longitude is" + location.getLongitude();textView.setText(crrrentPositionString);}LocationListener locationListener = new LocationListener() {public void onStatusChanged(String provider, int status, Bundle extras) {// TODO Auto-generated method stub}public void onProviderEnabled(String provider) {// TODO Auto-generated method stub}public void onProviderDisabled(String provider) {// TODO Auto-generated method stub}public void onLocationChanged(Location location) {showLocation(location);// 更新当前设备信息Log.d("111111", "222222");}};protected void onDestroy() {super .onDestroy();if (locationManager != null) {locationManager.removeUpdates(locationListener);}};}

AndroidManifest.xml代码如下：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"package="org.lxh.demo" android:versionCode="1" android:versionName="1.0"><uses-sdk android:minSdkVersion="10" /><uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/><!-- 声明权限 --><application android:icon="@drawable/icon" android:label="@string/app_name"><activity android:name=".Hello" android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application></manifest>

运行实例就可以显示你的当前经纬度，下面我们主要介绍一下怎么使用百度地图：

首先你要申请一个API Key，具体方法可以百度一下，都搞完了以后把jar包下载下来：

导入开发包：

然后设置布局文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <com.baidu.mapapi.map.MapView        android:id="@+id/map_view"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:clickable="true" /></LinearLayout>

然后修改MainActivity.java文件：

package com.example.baidumaptest;import java.util.List;import android.app.Activity;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.location.Location;import android.location.LocationManager;import android.os.Bundle;import android.widget.Toast;import com.baidu.mapapi.BMapManager;import com.baidu.mapapi.map.LocationData;import com.baidu.mapapi.map.MapController;import com.baidu.mapapi.map.MapView;import com.baidu.mapapi.map.MyLocationOverlay;import com.baidu.mapapi.map.PopupClickListener;import com.baidu.mapapi.map.PopupOverlay;import com.baidu.platform.comapi.basestruct.GeoPoint;public class MainActivity extends Activity {private BMapManager manager;private MapView mapView;private LocationManager locationManager;private String provider;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);manager = new BMapManager(this);// API Key需要替换成你自己的manager.init("SHVPoTtIpzfonPD3HCkc5sIt", null);setContentView(R.layout.activity_main);mapView = (MapView) findViewById(R.id.map_view);mapView.setBuiltInZoomControls(true);locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);// 获取所有可用的位置提供器List<String> providerList = locationManager.getProviders(true);if (providerList.contains(LocationManager.GPS_PROVIDER)) {provider = LocationManager.GPS_PROVIDER;} else if (providerList.contains(LocationManager.NETWORK_PROVIDER)) {provider = LocationManager.NETWORK_PROVIDER;} else {// 当没有可用的位置提供器时，弹出Toast提示用户Toast.makeText(this, "No location provider to use",Toast.LENGTH_SHORT).show();return;}Location location = locationManager.getLastKnownLocation(provider);if (location != null) {navigateTo(location);}}private void navigateTo(Location location) {MapController controller = mapView.getController();// 设置缩放级别controller.setZoom(16);GeoPoint point = new GeoPoint((int) (location.getLatitude() * 1E6),(int) (location.getLongitude() * 1E6));// 设置地图中心点controller.setCenter(point);MyLocationOverlay myLocationOverlay = new MyLocationOverlay(mapView);LocationData locationData = new LocationData();// 指定我的位置locationData.latitude = location.getLatitude();locationData.longitude = location.getLongitude();myLocationOverlay.setData(locationData);mapView.getOverlays().add(myLocationOverlay);// 刷新使新增覆盖物生效mapView.refresh();PopupOverlay pop = new PopupOverlay(mapView, new PopupClickListener() {@Overridepublic void onClickedPopup(int index) {// 相应图片的点击事件Toast.makeText(MainActivity.this,"You clicked button " + index, Toast.LENGTH_SHORT).show();}});// 创建一个长度为3的Bitmap数组Bitmap[] bitmaps = new Bitmap[3];try {// 将三张图片读取到内存中bitmaps[0] = BitmapFactory.decodeResource(getResources(),R.drawable.left);bitmaps[1] = BitmapFactory.decodeResource(getResources(),R.drawable.middle);bitmaps[2] = BitmapFactory.decodeResource(getResources(),R.drawable.right);} catch (Exception e) {e.printStackTrace();}pop.showPopup(bitmaps, point, 18);}@Overrideprotected void onDestroy() {mapView.destroy();if (manager != null) {manager.destroy();manager = null;}super.onDestroy();}@Overrideprotected void onPause() {mapView.onPause();if (manager != null) {manager.stop();}super.onPause();}@Overrideprotected void onResume() {mapView.onResume();if (manager != null) {manager.start();}super.onResume();}}

配置AndroidManifest.xml文件：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.baidumaptest"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="14"        android:targetSdkVersion="17" />    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />    <uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    <uses-permission android:name="android.permission.WRITE_SETTINGS" />    <uses-permission android:name="android.permission.READ_PHONE_STATE" />    <uses-permission android:name="android.permission.CALL_PHONE" />    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />    <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />    <uses-permission android:name="android.permission.ACCESS_GPS" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.example.baidumaptest.MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

运行实例：