实验02-android-原生定位

添加权限

MainActiivty.java

package com.example.yuansheng;

import java.io.IOException;
import java.util.List;
import java.util.Locale;

import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.location.Criteria;
import android.location.Geocoder;
import android.location.GpsStatus.Listener;
import android.location.Address;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
	LocationManager locationManager;
	Location location;
	String bestProvider;
	TextView textView;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		textView = (TextView) findViewById(R.id.tv);
		locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
		if (locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER) || locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
		  bestProvider = locationManager.getBestProvider(getCriteria(), true);
			Location location = locationManager.getLastKnownLocation(bestProvider);
			updateView(location);
			locationManager.requestLocationUpdates(bestProvider, 1000, 1, listener);
			return;
			
		}
		else{
		Toast.makeText(this, "请打开定位功能",Toast.LENGTH_LONG ).show();
		Intent intent = new Intent(Settings.ACTION_LOCALE_SETTINGS);
		intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		startActivityForResult(intent, 0);
	}
	}
	LocationListener listener = new LocationListener(){

		@Override
		public void onLocationChanged(Location location) {
			// TODO Auto-generated method stub
			updateView(location);
		}

		@Override
		public void onProviderDisabled(String provider) {
			// TODO Auto-generated method stub
			updateView(null);
			
		}

		@Override
		public void onProviderEnabled(String provider) {
			// TODO Auto-generated method stub
			Location  location = locationManager.getLastKnownLocation(provider);
			updateView(location);
		}

		@Override
		public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
			// TODO Auto-generated method stub
			
		}
		
	};
	
	private Criteria getCriteria() {
		// TODO Auto-generated method stub
		Criteria criteria = new Criteria();
		criteria.setAccuracy(Criteria.ACCURACY_FINE);
		criteria.setAltitudeRequired(false);
		criteria.setBearingRequired(true);
		criteria.setCostAllowed(true);
		criteria.setSpeedRequired(true);
		criteria.setPowerRequirement(Criteria.NO_REQUIREMENT);
		criteria.setBearingAccuracy(criteria.ACCURACY_HIGH);
		criteria.setHorizontalAccuracy(criteria.ACCURACY_HIGH);
		criteria.setVerticalAccuracy(criteria.ACCURACY_HIGH);
		return criteria;
	}

	private void updateView(Location location) {
		// TODO Auto-generated method stub
//		Address address = getAddress( this,location);
		StringBuilder stringBuilder = new StringBuilder();
		if(location !=null){
			stringBuilder.append("当前经度是:"+location.getLongitude()+"\n");
			stringBuilder.append("当前纬度是"+location.getLatitude()+"\n");
			stringBuilder.append("当前海拔是"+location.getAltitude()+"\n");
			stringBuilder.append("当前时间是"+location.getTime()+"\n");
//			stringBuilder.append("当前国家是"+address.getCountryName()+"\n");
//			stringBuilder.append("当前省份是"+address.getAdminArea()+"\n");
			
			textView.setText(stringBuilder.toString());
		}else {
			textView.setTag("location is null");
		}
		
	}
	
	private Address getAddress(Context context,Location location) {
		// TODO Auto-generated method stub
		Geocoder gecoder= new Geocoder(context,Locale.getDefault());
		try {
			List<Address> lists = gecoder.getFromLocation(location.getLongitude(), location.getLatitude(), 1);
			if(lists.size() >0){
				return lists.get(0);
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;

	}
	
}

activity_main.xml略
实验结果

项目需要注意添加权限,Criteria用于找到合适的地理位置提供者,有三种:gps,移动网络,主动发送位置

本文地址：https://blog.csdn.net/weixin_44123412/article/details/107482291