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 {

@Override
protected 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>