android如何獲取經緯度

NO IMAGE

android 定位的兩種方式:GPS_PROVIDER and NETWORK_PROVIDER

定位的可以藉助LocationManager來實現

MainActivity程式碼


static final String TAG = "MainActivity";
private TextView locationTV;
private LocationManager locationManager;
private String provider;
ArrayList<ContactModel> dataList = new ArrayList<ContactModel>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//  initView();
locationTV = (TextView) findViewById(R.id.locaiton_tv);
locationManager = (LocationManager) getSystemService(this.LOCATION_SERVICE);
// 獲取所有可用的位置提供器
List<String> providerList = locationManager.getProviders(true);
if (providerList.contains(LocationManager.GPS_PROVIDER)) {
provider = LocationManager.GPS_PROVIDER;
} else if (providerList.contains(LocationManager.NETWORK_PROVIDER)) {
provider = LocationManager.NETWORK_PROVIDER;
} else {
// 當沒有可用的位置提供器時,彈出Toast提示使用者
Toast.makeText(this, "No location provider to use", Toast.LENGTH_SHORT).show();
return;
}
Location location = locationManager.getLastKnownLocation(provider);
if (location != null) {
// 顯示當前裝置的位置資訊
showLocation(location);
}
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
//           int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
locationManager.requestLocationUpdates(provider, 5000, 1, locationListener); 
}
private void showLocation(Location location) {
String currentPosition = "latitude is "   location.getLatitude()   "\n"  "longitude is "   location.getLongitude();
locationTV.setText(currentPosition);
}
@Override
protected void onDestroy() {
super.onDestroy();
if (locationManager != null) {
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
//           int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
// 關閉程式時將監聽器移除
locationManager.removeUpdates(locationListener);
}
}
LocationListener locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
Toast.makeText(MainActivity.this,"onLocationChanged",Toast.LENGTH_SHORT).show();
}
@Override
public void onStatusChanged(String s, int i, Bundle bundle) {
Toast.makeText(MainActivity.this,"onStatusChanged",Toast.LENGTH_SHORT).show();
}
@Override
public void onProviderEnabled(String s) {
Toast.makeText(MainActivity.this,"onProviderEnabled",Toast.LENGTH_SHORT).show();
}
@Override
public void onProviderDisabled(String s) {
Toast.makeText(MainActivity.this,"onProviderDisabled",Toast.LENGTH_SHORT).show();
}
};