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;

    @Override
    protected 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() {
            @Override
            public 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);
    }

    @Override
    protected void onDestroy() {
        mapView.destroy();
        if (manager != null) {
            manager.destroy();
            manager = null;
        }
        super.onDestroy();
    }

    @Override
    protected void onPause() {
        mapView.onPause();
        if (manager != null) {
            manager.stop();
        }
        super.onPause();
    }

    @Override
    protected 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：