1.GPS定位：android 的三种定位方式

1.GPS定位:需要GPS硬件支持，直接和卫星交互来获取当前经纬度。
　　优点：速度快、精度高、可在无网络情况下使用。
　　缺点：首次连接时间长、只能在户外已经开阔地使用，设备上方有遮挡物就不行了、比较耗电。
2.Network定位:又细分为WIFI定位和基站定位
(1)基站定位:一般手机附近的三个基站进行三角定位，由于每个基站的位置是固定的，利用电磁波在这三个基站间中转所需要时间来算出手机所在的坐标
a.优点：受环境的影响情况较小，不管在室内还是人烟稀少的地方都能用，只要有基站。
b.缺点：首先需要消耗流量、其实精度没有GPS那么准确，大概在十几米到几十米之间
(2)WIFI定位:
a.优点：和基站定位一样，它的优势在于收环境影响较小，只要有Wifi的地方可以使用。
b.缺点：需要有wifi、精度不准
3.AGPS定位:AssistedGPS（辅助全球卫星定位系统），是结合GSM或GPRS与传统卫星定位

2.GPS定位代码

清单文件权限

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

代码

public class MainActivity extends AppCompatActivity {    LocationManager manager;    String[] permissions;    boolean hasnoPermission=false;    boolean isOk=true;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //要申请的权限列表        permissions=new String[]{Manifest.permission.ACCESS_COARSE_LOCATION,Manifest.permission.ACCESS_FINE_LOCATION};        manager = (LocationManager) getSystemService(LOCATION_SERVICE);//获得定位的管理类        initPermission();        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {            return;        }        manager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);    }    public void initPermission(){        if(Build.VERSION.SDK_INT>=Build.VERSION_CODES.M){            for(String per: permissions){                if(checkSelfPermission(per)!=PackageManager.PERMISSION_GRANTED){                    hasnoPermission=true;                    break;                }            }            if(hasnoPermission){               requestPermissions(permissions,100);            }        }    }    @Override    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {        super.onRequestPermissionsResult(requestCode, permissions, grantResults);        if(requestCode==100){            for(int resule:grantResults){                        if(resule!=PackageManager.PERMISSION_GRANTED){                            isOk=true;                            break;                }            }            if(isOk){                Log.d("aaaa", "onRequestPermissionsResult: 权限没有申请成功");            }        }    }    LocationListener locationListener = new LocationListener() {        @Override        public void onLocationChanged(Location location) {            Log.d("aaaa", "onLocationChanged: 经度"+location.getLatitude());            Log.d("aaaa", "onLocationChanged: 纬度"+location.getLongitude());            Log.d("aaaa", "onLocationChanged: 海拔"+location.getAltitude());        }        @Override        public void onStatusChanged(String provider, int status, Bundle extras) {        }        @Override        public void onProviderEnabled(String provider) {        }        @Override        public void onProviderDisabled(String provider) {        }    };}

使用高德地图

添加依赖：implementation ‘com.amap.api:map2d:5.2.0’

xml布局

<LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="match_parent"    android:layout_height="match_parent">    <com.amap.api.maps2d.MapView        android:id="@+id/map"        android:layout_width="fill_parent"        android:layout_height="fill_parent" />LinearLayout>

Java代码

public class Main2Activity extends AppCompatActivity implements AMapLocationListener , LocationSource {    TextView mLocation;    MapView mapView;    AMap aMap;    OnLocationChangedListener mListener;    AMapLocationClient client;    AMapLocationClientOption op;    @RequiresApi(api = Build.VERSION_CODES.M)    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main2);        checkPermisson();        mapView=findViewById(R.id.map);        mapView.onCreate(savedInstanceState);        if(aMap==null){            aMap=mapView.getMap();            init();        }    }    private void init() {        MyLocationStyle myLocationStyle=new MyLocationStyle();        myLocationStyle.myLocationIcon(BitmapDescriptorFactory.fromResource(R.mipmap.ic_launcher_round));        myLocationStyle.radiusFillColor(Color.argb(100,0,0,180));        myLocationStyle.strokeWidth(1.0f);        aMap.setMyLocationStyle(myLocationStyle);        aMap.setLocationSource(this);        aMap.setMyLocationEnabled(true);    }    private void initLocation() {        client=new AMapLocationClient(getApplicationContext());        op=new AMapLocationClientOption();        client.setLocationListener(this);        op.setLocationMode(AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);        op.setInterval(1000);        op.setNeedAddress(true);        op.setMockEnable(true);        client.setLocationOption(op);        client.startLocation();    }    @Override    protected void onDestroy() {        super.onDestroy();        mapView.onDestroy();    }    @Override    protected void onPause() {        super.onPause();        mapView.onPause();    }    @Override    protected void onResume() {        super.onResume();        mapView.onResume();    }    @Override    public void onSaveInstanceState(Bundle outState, PersistableBundle outPersistentState) {        super.onSaveInstanceState(outState, outPersistentState);        mapView.onSaveInstanceState(outState);    }    @Override    public void onLocationChanged(AMapLocation aMapLocation) {//        Log.e("ZXY","errorCode"+aMapLocation.getErrorCode());//        Log.e("ZXY","errorInfo"+aMapLocation.getErrorInfo());//        Log.e("ZXY","地址:"+aMapLocation.getAddress());//        Log.e("ZXY","纬度:"+aMapLocation.getLatitude());//        Log.e("ZXY","经度:"+aMapLocation.getLongitude());          if(aMapLocation.getErrorCode()==0)             mListener.onLocationChanged(aMapLocation);    }    String[] permissions = new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION};    @RequiresApi(api = Build.VERSION_CODES.M)    public void checkPermisson(){        boolean flag=true;//默认全部被申请过        for(int i=0;i<permissions.length;i++){//只要有一个没有申请成功            if(!(ActivityCompat.checkSelfPermission(this,permissions[i])== PackageManager.PERMISSION_GRANTED)){                flag=false;            }        }        if(!flag){            //动态申请权限            requestPermissions(permissions,100);        }    }    @Override    public void activate(OnLocationChangedListener onLocationChangedListener) {        mListener=onLocationChangedListener;        if(client==null){             client=new AMapLocationClient(getApplicationContext());             op=new AMapLocationClientOption();             client.setLocationListener(this);             op.setLocationMode(AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);             client.setLocationOption(op);             client.startLocation();        }    }    @Override    public void deactivate() {        mListener=null;        if(client!=null){            client.stopLocation();            client.onDestroy();        }        client=null;    }    @Override    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {        super.onRequestPermissionsResult(requestCode, permissions, grantResults);        if(requestCode==100){            boolean flag=true;            for(int i=0;i<grantResults.length;i++){                if(grantResults[i]!=PackageManager.PERMISSION_GRANTED){                    flag=false;                }            }            if(flag){                Toast.makeText(this, "ok ", Toast.LENGTH_SHORT).show();            }else{                Toast.makeText(this, "error", Toast.LENGTH_SHORT).show();            }        }    }}

GPS定位与高德地图的使用

Android GPS定位与高德地图的使用

1.GPS定位：android 的三种定位方式

2.GPS定位代码

使用高德地图

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