Android GSP定位获取经纬度并显示所在城市的名字(不用引入各种SDK)

Android GSP定位获取经纬度并显示所在城市的名字(不用引入各种sdk)

 主要是通过GPS定位来获取经纬度，然后通过经纬度转换成所在的城市：

package com.uucwerewolf.map;

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

import android.app.Activity;
import android.content.Context;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends Activity {
	String latLongString;
	Double a, b;
	private TextView city;
	private TextView showJW = null;
	private LocationManager locationManager;

	private double latitude = 0;

	private double longitude = 0;

	private Handler handler = new Handler() {
		public void handleMessage(android.os.Message msg) {
			double[] data = (double[]) msg.obj;
			showJW.setText("经度：" + data[0] + "\t纬度:" + data[1]);

			List
 addList = null;
			Geocoder ge = new Geocoder(getApplicationContext());
			try {
				addList = ge.getFromLocation(data[0], data[1], 1);
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			if (addList != null && addList.size() > 0) {
				for (int i = 0; i < addList.size(); i++) {
					Address ad = addList.get(i);
					latLongString = ad.getLocality();
				}
			}
			city.setText(latLongString);
		}

	};

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		showJW = (TextView) findViewById(R.id.showJW);
		city = (TextView) findViewById(R.id.city);
		locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
		new Thread() {
			@Override
			public void run() {
				Location location = locationManager
						.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
				if (location != null) {
					latitude = location.getLatitude(); // 经度
					longitude = location.getLongitude(); // 纬度
					double[] data = { latitude, longitude };
					Message msg = handler.obtainMessage();
					msg.obj = data;
					handler.sendMessage(msg);
				}
			}
		}.start();

	}

	/**
	 * 确定按钮监听
	 * 
	 * @param view
	 */
	public void getJW(View view) {
		new Thread() {
			@Override
			public void run() {
				Location location = locationManager
						.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
				if (location != null) {
					latitude = location.getLatitude(); // 经度
					longitude = location.getLongitude(); // 纬度
					double[] data = { latitude, longitude };
					Message msg = handler.obtainMessage();
					msg.obj = data;
					handler.sendMessage(msg);
				}
			}
		}.start();
	}

}

布局就是一个显示经纬度，一个显示城市：

权限：