我编码检测我在android marshmallow中的当前位置，但我得到null位置。请告诉任何解决方案来解决这个问题。谷歌地图正在我的手机中工作，所以为什么它返回null。
MainActivity.class
if (isGPSEnabled) {
if (location == null) {
mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
if (mLocationManager != null) {
// mLocationManager.removeUpdates(locationListener);
location = mLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
Log.i("location","location-->"+location);
tv_new.setText("Location:" +String.valueOf(location));
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
tv_lat.setText("Latitude:" + String.valueOf(latitude));
tv_lon.setText("Longitude:" +String.valueOf(longitude));
String filterAddress = "";
try {
Log.i("TAG", "geoCoder" + geoCoder);
List<Address> addresses = geoCoder.getFromLocation(latitude, longitude, 1);
Log.i("TAG", "addresses" + addresses.size()+latitude+longitude);
for (int i = 0; i < addresses.get(0)
.getMaxAddressLineIndex(); i++) {
filterAddress += addresses.get(0).getAddressLine(i)
+ " ";
Log.i("TAG", "filterAddress" + filterAddress);
tv_address.setText("Address"+ filterAddress);
}
}
catch (IOException ex) {
Log.i("TAG", "filterAddress catch 1st"+ ex+ filterAddress);
ex.printStackTrace();
} catch (Exception e2) {
Log.i("TAG", "filterAddress catch 2nd"+e2+"--->"+geoCoder);
// TODO: handle exception
e2.printStackTrace();
}
}
}
}
}
输出
Location:null in ASUS_ZOOLD Phone
答案 0 :(得分：1)
试试这样..
public class Splash extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener, ResultCallback<LocationSettingsResult> {
/** Define all global variables over here */
Context context;
private static final int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
// All GPS based work goes over here ..
protected static final String TAG = "UserNavigation";
protected static final int REQUEST_CHECK_SETTINGS = 0x1;
public static final long UPDATE_INTERVAL_IN_MILLISECONDS = 1000;
public static final long FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS = UPDATE_INTERVAL_IN_MILLISECONDS / 2;
protected GoogleApiClient mGoogleApiClient;
protected LocationRequest mLocationRequest;
protected LocationSettingsRequest mLocationSettingsRequest;
protected Location mCurrentLocation;
protected Boolean mRequestingLocationUpdates = false;
protected String mLastUpdateTime;
private static final int PERMISSION_ACCESS_COARSE_LOCATION = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_splash);
context = Splash.this;
SharedPrefUtil.setSharedPref(context, "alert", false);
new TestAsync().execute();
initui();
PulsatorLayout pulsator = (PulsatorLayout) findViewById(R.id.pulsator);
pulsator.start();
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
{
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED)
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.CALL_PHONE}, PERMISSION_ACCESS_COARSE_LOCATION);
else
checkLocationSettings();
}
else
checkLocationSettings();
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case PERMISSION_ACCESS_COARSE_LOCATION:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED && grantResults[1] == PackageManager.PERMISSION_GRANTED)
checkLocationSettings();
else
finish();
break;
}
}
private void initui() {
initiateSplashWork();
}
private void initiateSplashWork() {
if (checkPlayServices()) {
initiateGPS();
}
}
private void initiateGPS()
{
buildGoogleApiClient();
createLocationRequest();
buildLocationSettingsRequest();
}
private boolean checkPlayServices() {
GoogleApiAvailability apiAvailability = GoogleApiAvailability.getInstance();
int resultCode = apiAvailability.isGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.SUCCESS) {
if (apiAvailability.isUserResolvableError(resultCode)) {
apiAvailability.getErrorDialog(this, resultCode, PLAY_SERVICES_RESOLUTION_REQUEST)
.show();
} else {
Toast.makeText(context, R.string.toast_device_not_support, Toast.LENGTH_SHORT).show();
finish();
}
return false;
}
return true;
}
/** All GPS based method callback */
@Override
public void onConnected(Bundle bundle) {
Thread logoTimer = new Thread() {
public void run() {
try {
int logoTimer = 0;
while (logoTimer < 5000) {
sleep(100);
logoTimer = logoTimer + 100;
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};
logoTimer.start();
if (mCurrentLocation == null)
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
{
if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED)
{
mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
return;
}
else
{
mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
}
}
else
{
mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
}
}
}
private void initiateNext()
{
Thread logoTimer = new Thread() {
public void run()
{
try
{
int logoTimer = 0;
while (logoTimer < 5000) {
sleep(100);
logoTimer = logoTimer + 100;
}
Intent intent = new Intent(context, OneClassBuilt.class);
startActivity(intent);
}
catch (InterruptedException e)
{
e.printStackTrace();
}
finally
{
finish();
}
}
};
logoTimer.start();
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
@Override
public void onLocationChanged(Location location) {
mCurrentLocation = location;
mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
Toast.makeText(context, "onLocationChanged method : " + location.getLatitude() + " ____ " + location.getLongitude(), Toast.LENGTH_SHORT).show();
SharedPrefUtil.setSharedPref(context, "lat", String.valueOf(location.getLatitude()));
SharedPrefUtil.setSharedPref(context, "lon", String.valueOf(location.getLongitude()));
}
protected synchronized void buildGoogleApiClient() {
Log.i(TAG, "Building GoogleApiClient");
mGoogleApiClient = new GoogleApiClient.Builder(this).addConnectionCallbacks(this).addOnConnectionFailedListener(this).addApi(LocationServices.API).build();
}
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
protected void buildLocationSettingsRequest() {
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
builder.addLocationRequest(mLocationRequest);
builder.setAlwaysShow(true);
mLocationSettingsRequest = builder.build();
}
protected void checkLocationSettings() {
PendingResult<LocationSettingsResult> result = LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, mLocationSettingsRequest);
result.setResultCallback(this);
}
@Override
public void onResult(LocationSettingsResult locationSettingsResult) {
final Status status = locationSettingsResult.getStatus();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
Log.i(TAG, "All location settings are satisfied.");
startLocationUpdates();
initiateNext();
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
Log.i(TAG, "Location settings are not satisfied. Show the user a dialog to" + "upgrade location settings ");
try {
status.startResolutionForResult(Splash.this, REQUEST_CHECK_SETTINGS);
} catch (IntentSender.SendIntentException e) {
Log.i(TAG, "PendingIntent unable to execute request.");
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
finish();
Log.i(TAG, "Location settings are inadequate, and cannot be fixed here. Dialog " + "not created.");
break;
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case REQUEST_CHECK_SETTINGS:
switch (resultCode) {
case Activity.RESULT_OK:
Log.i(TAG, "User agreed to make required location settings changes.");
startLocationUpdates();
initiateNext();
break;
case Activity.RESULT_CANCELED:
Log.i(TAG, "User chose not to make required location settings changes.");
finish();
break;
}
break;
}
}
protected void startLocationUpdates() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
}
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this).setResultCallback(new ResultCallback<Status>() {
@Override
public void onResult(Status status) {
mRequestingLocationUpdates = true;
}
});
}
protected void stopLocationUpdates() {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this).setResultCallback(new ResultCallback<Status>() {
@Override
public void onResult(Status status) {
mRequestingLocationUpdates = false;
}
});
}
@Override
protected void onStart() {
super.onStart();
if (mGoogleApiClient != null)
mGoogleApiClient.connect();
}
@Override
public void onResume() {
super.onResume();
if (mGoogleApiClient != null && mGoogleApiClient.isConnected() && mRequestingLocationUpdates)
startLocationUpdates();
}
@Override
protected void onPause() {
super.onPause();
if (mGoogleApiClient != null && mGoogleApiClient.isConnected())
stopLocationUpdates();
}
@Override
protected void onStop() {
if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) {
mGoogleApiClient.disconnect();
}
super.onStop();
}
} // End of main class over here ..
在清单中：
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
在App gradle文件中依赖add ..
compile 'com.google.android.gms:play-services:8.4.0'
compile 'com.google.android.gms:play-services-location:8.1.0'
答案 1 :(得分：0)
添加此代码以请求许可
`
private void checkForPermisson {
if (ActivityCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 202);
}
return;
} else {
//add your if block here
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case 202:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//add your if block here
} else {
Log.e(TAG, "else RequestPermission");
}
break;
default:
return;
}
}
`