Android开发之android_gps定位服务简单实现

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context=".MainActivity"
  android:orientation="vertical"
  >
  <TextView
    android:id="@+id/tv_show"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="5dp"
    android:textSize="22dp"
    android:textStyle="bold" />
</LinearLayout>

package cn.gemuxiaoshe.gpsapplication20;
import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.provider.Settings;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;
import java.util.Date;
public class MainActivity extends AppCompatActivity {
  private LocationManager lm;
  private TextView tv_show;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    tv_show = (TextView) findViewById(R.id.tv_show);
    lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    if (!isGpsAble(lm)) {
      Toast.makeText(MainActivity.this, "请打开Gps!", Toast.LENGTH_SHORT).show();
      openGps();
    }
    // 从gps获取最近的定位信息
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
      return;
    }
    Location lc = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
    updateShow(lc);
    //设置间隔两秒获得一次gps定位信息
    lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 8, new LocationListener() {
      @Override
      public void onLocationChanged(Location location) {
        // 当gps定位信息发生改变时,更新定位
        updateShow(location);
      }
      @Override
      public void onStatusChanged(String s, int i, Bundle bundle) {
      }
      @Override
      public void onProviderEnabled(String provider) {
        // 当gpsLocationProvider可用时,更新定位
        if (ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
          return;
        }
        updateShow(lm.getLastKnownLocation(provider));
      }
      @Override
      public void onProviderDisabled(String s) {
      updateShow(null);
      }
    });
  }
  // 定义更新显示的方法
  private void updateShow(Location location){
    if (location!=null){
      StringBuilder sb =new StringBuilder();
      sb.append("当前gps位置定位信息:\n");
      sb.append("经度:"+location.getLongitude()+"\n");
      sb.append("维度:"+location.getLatitude()+"\n");
      sb.append("海拔:"+location.getAltitude()+"\n");
      sb.append("速度:"+location.getSpeed()+"\n");
      sb.append("方位:"+location.getBearing()+"\n");
      sb.append("时间:"+location.getTime()+"\n");
      sb.append("定位精度:"+location.getLongitude()+"\n");
      tv_show.setText(sb.toString());
    }else
      tv_show.setText("");
  }
  private boolean isGpsAble(LocationManager lm) {
    return lm.isProviderEnabled(LocationManager.GPS_PROVIDER)?true:false;
  }
  // 打开设置界面让用户自己设置
  private void openGps(){
    Intent intent = new Intent(Settings.ACTION_LOCALE_SETTINGS);
    startActivityForResult(intent,0);
  }
}

  if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
      return;
    }