Android实现地理定位功能

最近试着写了一下Android的定位，代码在下面，比较简单首先需要的权限有

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />  <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>  <uses-permission android:name="android.permission.INTERNET"/> 

然后是里面的代码

package com.example.a5.myapplication;  import android.Manifest; import android.content.Context; import android.content.pm.PackageManager; import android.location.Criteria; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.support.v4.app.ActivityCompat; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.webkit.WebView; import android.widget.Button; import android.widget.TextView;  public class MainActivity extends AppCompatActivity {   @Override  protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   requestWindowFeature(Window.FEATURE_NO_TITLE);   //全屏   getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,     WindowManager.LayoutParams.FLAG_FULLSCREEN);   setContentView(R.layout.activity_main);   Button button = (Button) findViewById(R.id.button);   button.setOnClickListener(new View.OnClickListener() {    @Override    public void onClick(View v) {     //获取位置服务     LocationManager locationManager = (LocationManager) MainActivity.this.getSystemService(Context.LOCATION_SERVICE);     Criteria criteria = new Criteria();     //ACCURACY_HIGH/ACCURACY_LOW精度选择     criteria.setAccuracy(Criteria.ACCURACY_FINE);     //高度     criteria.setAltitudeRequired(true);     //方位信息     criteria.setBearingRequired(true);     //是否允许付费     criteria.setCostAllowed(true);     //对电量的要求     criteria.setPowerRequirement(Criteria.POWER_LOW);     //速度     criteria.setSpeedRequired(true);     //获取最佳服务     String provider = locationManager.getBestProvider(criteria, true);     //权限检查     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;     }     //获取到了位置     Location location = locationManager.getLastKnownLocation(provider);     //开启地理位置监听定位类型、毫秒、米、监听时间     locationManager.requestLocationUpdates(provider,3000,1,new listener());     locateResult(location);     }   });  }  public class listener implements LocationListener {    @Override   public void onLocationChanged(Location location) {    //位置变化，获取最新的位置    locateResult(location);   }    @Override   public void onStatusChanged(String provider, int status, Bundle extras) {    }    @Override   public void onProviderEnabled(String provider) {    }    @Override   public void onProviderDisabled(String provider) {    }  }   public void locateResult(Location location){   new AlertDialog.Builder(MainActivity.this)     .setMessage("纬度" + String.valueOf(location.getLatitude()) +       "\n经度" + String.valueOf(location.getLongitude()) +       "\n速度" + String.valueOf(location.getSpeed()) +       "\n高度" + String.valueOf(location.getAltitude()) +       "\n朝向" + String.valueOf(location.getBearing())     )     .setNegativeButton("取消",null)     .show();  } } 

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