GPS定位那点事

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="com.android.antking.gps"      android:versionCode="1"      android:versionName="1.0">    <uses-sdk android:minSdkVersion="7" />    <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"></uses-permission>    <uses-permission android:name="android.permission.UPDATE_DEVICE_STATS"></uses-permission>    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>    <uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"></uses-permission>    <application android:icon="@drawable/icon" android:label="@string/app_name">        <activity android:name=".GPSActivity"                  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>

实现

package com.android.antking.gps;import android.app.Activity;import android.content.Context;import android.location.Criteria;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 GPSActivity extends Activity {    //声明位置管理对象 private LocationManager locationManager; //声明位置监听对象 private LocationListener locationListener; //声明字符串变量 String locationprovider; //声明显示文本视图组建 private TextView textview;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        //获得文本视图        textview = (TextView)this.findViewById(R.id.textView1);        try{        //新建Criteria类        Criteria locationcriteria = new Criteria();        //设置精确精度        locationcriteria.setAccuracy(Criteria.ACCURACY_FINE);        //不提供海拔高度信息        locationcriteria.setAltitudeRequired(false);        //不提供方向信息        locationcriteria.setBearingRequired(false);        //允许运营商计费        locationcriteria.setCostAllowed(true);        //设置电池消耗为低耗费        locationcriteria.setPowerRequirement(Criteria.POWER_LOW);        //使用getSystemService()方法获得位置管理器对象        locationManager        =(LocationManager)getSystemService(Context.LOCATION_SERVICE);        //locationManager.setTestProviderEnabled("gps", true);        Toast.makeText(GPSActivity.this, "getSystemService", Toast.LENGTH_SHORT).show();        //检查gps功能开启        if(checkgps()){        locationprovider         =locationManager.getBestProvider(locationcriteria, true);        Log.d("provider", locationprovider);        //注册位置监听器        locationListener = new MyLocationListener();        locationManager.requestLocationUpdates(locationprovider, 1000, 0,locationListener);        }        }catch(Exception e){        Toast.makeText(GPSActivity.this, "异常错误"+e.toString(),Toast.LENGTH_LONG).show();        }           }    private class MyLocationListener implements LocationListener{         /**          * 若位置发生变化，onLocationChanged方法被调用          */@Overridepublic void onLocationChanged(Location location) {// TODO Auto-generated method stubLog.i("位置发生变化", "Invoke");if(location != null){//获得经度String latitude = Double.toString(location.getLatitude());//经度//获得纬度   String longitude = Double.toString(location.getLongitude());//纬度//在文本框中显示   textview = (TextView)GPSActivity.this.findViewById(R.id.textView1);textview.setText("经度："+longitude+"纬度"+latitude);}//locationManager.removeUpdates(this);//locationManager.setTestProviderEnabled("gps", true);}         //若屏蔽提供商，该方法被调用@Overridepublic void onProviderDisabled(String provider) {// TODO Auto-generated method stubLog.i("屏蔽提供商", "Invode");}        //若激活提供商，该方法被调用@Overridepublic void onProviderEnabled(String provider) {// TODO Auto-generated method stubLog.i("激活提供商", "Invode");}       //若状态发生变化，该方法被调用@Overridepublic void onStatusChanged(String provider, int status, Bundle extras) {// TODO Auto-generated method stubLog.i("状态发生变化", "Invode");}        }    private boolean checkgps(){    boolean providerEnabled     = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);    //若被激活，则返回真值    if(providerEnabled ==true){    Toast.makeText(this, "Gps模块活动正常", Toast.LENGTH_SHORT).show();    return true;    }    else{    Toast.makeText(this, "请开启GPS", Toast.LENGTH_SHORT);    return false;    }        }   }

更多相关文章

随机推荐