android定位服务：查看位置源及其属性

activity_main.xml：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".LocationProviderActivity" >    <TextView        android:id="@+id/location"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/hello_world"         android:textSize="30dp"/></RelativeLayout>

LocationProviderActivity.java：

package com.example.demolocation;import java.util.Iterator;import java.util.List;import android.app.Activity;import android.location.Criteria;import android.location.LocationManager;import android.location.LocationProvider;import android.os.Bundle;import android.widget.TextView;public class LocationProviderActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);StringBuilder sb = new StringBuilder();LocationManager manager = (LocationManager)getSystemService(LOCATION_SERVICE);List<String> providers = manager.getAllProviders();String str = "";LocationProvider provider = null;for(Iterator<String> it = providers.iterator();it.hasNext();){str = it.next();sb.append("位置源:"+str+"\n精度：");provider = manager.getProvider(str);switch(provider.getAccuracy()){case Criteria.ACCURACY_COARSE:sb.append("中等精度");break;case Criteria.ACCURACY_FINE:sb.append("低等精度");break;case Criteria.ACCURACY_HIGH:sb.append("高等精度");break;}sb.append("\n耗电量：");switch(provider.getPowerRequirement()){case Criteria.POWER_HIGH:sb.append("高耗电量");break;case Criteria.POWER_MEDIUM:sb.append("中耗电量");break;case Criteria.POWER_LOW:sb.append("低耗电量");break;}sb.append("\n-------------\n");}TextView text = (TextView)findViewById(R.id.location);text.setText(sb.toString());}}

在 android配置文件中，增加android.permission.ACCESS_FINE_LOCATION权限：

AndroidManifest.xml：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.demolocation"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="19" />        <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.example.demolocation.LocationProviderActivity"            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>

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