Android学习笔记(二十八)
用户定位UserLocationActivity
package org.wp.activity;import java.util.List;import android.app.Activity;import android.app.AlertDialog;import android.content.Context;import android.location.Criteria;import android.location.LocationManager;import android.os.Bundle;import android.view.View;import android.widget.Button;/** * setAltitudeRequired(boolean altitudeRequired)* 是否提供海拔/高度的信息* setAccuracy(int accuracy)* 设置经纬度的精确程度 ACCURACY_FINE/ACCURACY_COARSE* setBearingRequired(boolean bearingRequired)* 是否提供方向的信息* setBearingAccuracy(int accuracy)* 设置方向的精确程度 ACCURACY_LOW/ACCURACY_HIGH/NO_REQUIREMENT* setSpeedRequired(boolean speedRequired)* 是否提供速度的信息* setSpeedAccuracy(int accuracy)* 设置速度精确度 ACCURACY_LOW/ACCURACY_HIGH/NO_REQUIREMENT* setHorizontalAccuracy(int accuracy) * 设置水平精确度 ACCURACY_LOW/ACCURACY_MEDIUM/ACCURACY_HIGH/NO_REQUIREMENT * setVerticalAccuracy(int accuracy)* 设置垂直精确度 ACCURACY_LOW/ACCURACY_HIGH/NO_REQUIREMENT* setPowerRequirement(int level) * 设置最高耗电等级 POWER_LOW/POWER_MEDIUM/POWER_HIGH/NO_REQUIREMENT * setCostAllowed(boolean costAllowed)* 是否允许产生费用 ** @author wp **/public class UserLocationActivity extends Activity {private Button searchProviderButton;private Button bestProviderButton;private LocationManager locationManager;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);searchProviderButton = (Button) this.findViewById(R.id.searchProviderButton);bestProviderButton = (Button) this.findViewById(R.id.bestProviderButton);locationManager = (LocationManager) UserLocationActivity.this.getSystemService(Context.LOCATION_SERVICE);searchProviderButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// 获得所有的ProviderList<String> providers = locationManager.getAllProviders();String[] strs = new String;for (int i = 0; i < providers.size(); i++) {strs = providers.get(i);}AlertDialog.Builder builder = new AlertDialog.Builder(UserLocationActivity.this);builder.setTitle("所有Provider");builder.setItems(strs, null);AlertDialog dialog = builder.create();dialog.show();}});bestProviderButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Criteria criteria = new Criteria();criteria.setAccuracy(Criteria.ACCURACY_COARSE);criteria.setBearingRequired(false);criteria.setSpeedRequired(false);criteria.setPowerRequirement(Criteria.POWER_LOW);criteria.setCostAllowed(false);// 第二个参数 enabledOnly provider是否是可用状态String provider = locationManager.getBestProvider(criteria,false);AlertDialog.Builder builder = new AlertDialog.Builder(UserLocationActivity.this);builder.setTitle("最符合标准的provider");builder.setMessage(provider);AlertDialog dialog = builder.create();dialog.show();}});}}
main.xml
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><Buttonandroid:id="@+id/searchProviderButton"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="查询当前设备支持的Provider"/><Buttonandroid:id="@+id/bestProviderButton"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="获得最符合条件的Provider"/></LinearLayout>
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"package="org.wp.activity" android:versionCode="1" android:versionName="1.0"><application android:icon="@drawable/icon" android:label="@string/app_name"><activity android:name=".UserLocationActivity" 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><uses-sdk android:minSdkVersion="7" /><!-- Allows an application to access fine (e.g., GPS) location --><uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /><!-- Allows an application to access coarse (e.g., Cell-ID, WiFi) location --><uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /></manifest>
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