使用经纬度得到位置Geocorder

先得到经纬度再用geocorder 显示位置,需要手机打开位置权限,使用GPS的话把注释去掉,GPS在室内很容易收不到信号,得到位置为空

public class MainActivity extends AppCompatActivity  {
    private LocationManager lm;
    double latitude;
    double longitude;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
            lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
//            if (!lm.isProviderEnabled(LocationManager.GPS_PROVIDER) ? true : false) {
//                Toast.makeText(MainActivity.this, "请打开GPS~", Toast.LENGTH_SHORT).show();
//                Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_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) {
            //位置权限打开检查
            return;
        }
            Location location = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
//            Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        if (location != null) {
        latitude = location.getLatitude();
        longitude = location.getLongitude();
        System.out.println("经度"+longitude);
        }

            //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

                }

                @Override
                public void onStatusChanged(String provider, int status, Bundle extras) {

                }

                @SuppressLint("MissingPermission")
                @Override
                public void onProviderEnabled(String provider) {

                }

                @Override
                public void onProviderDisabled(String provider) {

                }
            });



            Geocoder gc = new Geocoder(this, Locale.getDefault());
    List<Address> address = null;
        try {
             address = gc.getFromLocation(latitude, longitude, 1);
        } catch(IOException e){
        e.printStackTrace();
    }

    Address address2 = address.get(0);//得到Address实例
    //Log.i(TAG, "address =" + address);
    String countryName = address2.getCountryName();//得到国家名称，比方：中国
        System.out.println("countryName = "+countryName);
    String locality = address2.getLocality();//得到城市名称，比方：北京市
        System.out.println("locality = "+locality);
        for(int i = 0; address2.getAddressLine(i)!=null;i++)
    {
        String addressLine = address2.getAddressLine(i);//得到周边信息。包含街道等。i=0，得到街道名称
        System.out.println("addressLine = " + addressLine);
    }
}
    }

 xmlns:tools="http://schemas.android.com/tools"
    package="com.january.spring">
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

 如果8.0以下geocoder可能无法得到,要把它放在线程执行里才行