关于Android获取GPS位置问题_course

各位大佬，我是大二学生。最近在看《第一行代码（第一版）》时，看到GPS定位时按着书上代码打的，但是却显示工程发生错误，检查了一下代码，未能发现错误。特此求助。 注明：已在AndroidMainFest中声明网络权限和位置权限。 package com.example.school_pet; 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.widget.TextView; import android.widget.Toast; public class test_location extends Activity{ private TextView positionTextView; private LocationManager locationManager; private String provider; protected void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.location_test); positionTextView=(TextView)findViewById(R.id.show_location); 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 { 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); } protected void onDestroy(){ super.onDestroy(); if(locationManager!=null){ locationManager.removeUpdates(locationListener); } } LocationListener locationListener=new LocationListener(){ public void onStatusChanged(String provider,int status,Bundle extras){ } public void onProviderEnabled(String provider){ } public void onProviderDisabled(String provider){ } public void onLocationChanged(Location location){ showLocation(location); } }; private void showLocation(Location location){ String currentPosition="latitude is"+location.getLatitude()+"\n"+"longitude is "+location.getLongitude(); positionTextView.setText(currentPosition); } }

Xamarin Android 集成百度定位SDK_course

一、准备工作 1、下载sha1 查看apk “MCodeCheck“备用。 2、下载安卓模拟器（非sdk原生模拟器，国内的一些模拟器如夜神、逍遥之类的），因为百度定位sdk不支持原生模拟器。如使用真机