Java Android位置权限代码无法正常工作
我编写了一个简单的代码,用于在运行时从用户处获取位置权限仅在第一次正常工作。之后,权限对话框根本不会出现。有人能告诉我代码中缺少了什么吗Java Android位置权限代码无法正常工作,java,android,google-maps,location,geocoding,Java,Android,Google Maps,Location,Geocoding,我编写了一个简单的代码,用于在运行时从用户处获取位置权限仅在第一次正常工作。之后,权限对话框根本不会出现。有人能告诉我代码中缺少了什么吗 public static final String FINE_LOCATION=Manifest.permission.ACCESS_FINE_LOCATION; public static final String COARSE_LOCATION=Manifest.permission.ACCESS_COARSE_LOCATION; p
public static final String FINE_LOCATION=Manifest.permission.ACCESS_FINE_LOCATION;
public static final String COARSE_LOCATION=Manifest.permission.ACCESS_COARSE_LOCATION;
private static final int LOCATION_PERMISSION_REQUEST_CODE=1234;
private boolean mLocationPermissionGranted=false;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
getLocationPermission();
}
public void initMap() {
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
Toast.makeText(this, "Map is ready", Toast.LENGTH_SHORT).show();
}
public void getLocationPermission(){
String [] permissions={Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.ACCESS_COARSE_LOCATION};
if(ContextCompat.checkSelfPermission(this.getApplicationContext(),FINE_LOCATION)==PackageManager.PERMISSION_GRANTED){
if(ContextCompat.checkSelfPermission(this.getApplicationContext(),COARSE_LOCATION)==PackageManager.PERMISSION_GRANTED){
mLocationPermissionGranted=true;
initMap();
} else {
ActivityCompat.requestPermissions(this,permissions,LOCATION_PERMISSION_REQUEST_CODE);
}
}
else {
ActivityCompat.requestPermissions(this,permissions,LOCATION_PERMISSION_REQUEST_CODE);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
mLocationPermissionGranted=false;
switch (requestCode){
case LOCATION_PERMISSION_REQUEST_CODE:{
if(grantResults.length>0){
for(int i=0;i<grantResults.length;i++){
if(grantResults[i]!=PackageManager.PERMISSION_GRANTED){
mLocationPermissionGranted=false;
return;
}
}
mLocationPermissionGranted=true;
initMap();
}
}
}
}
我是谷歌地图编码新手,所以我对它知之甚少。任何人都有办法,请帮帮我。提前谢谢
这是它第一次正常工作。在得到许可之后
对话框根本不出现
一旦授予权限,则无需再次允许,除非用户通过设置应用程序更改权限或重新安装应用程序等
这是它第一次正常工作。在得到许可之后
对话框根本不出现
一旦授予权限,则无需再次允许,除非用户通过设置应用程序更改权限或重新安装应用程序等。您可以使用以下代码:
public static double longitude = 0.0d;
public static double latitude = 0.0d;
private FusedLocationProviderClient mFusedLocationClient;
private long UPDATE_INTERVAL = 30 * 1000; /* 10 secs */
private long FASTEST_INTERVAL = 2000; /* 2 sec */
protected void startLocationUpdates() {
LocationRequest mLocationRequest = new LocationRequest();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(UPDATE_INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
// Create LocationSettingsRequest object using location request
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
builder.addLocationRequest(mLocationRequest);
LocationSettingsRequest locationSettingsRequest = builder.build();
// Check whether location settings are satisfied
// https://developers.google.com/android/reference/com/google/android/gms/location/SettingsClient
SettingsClient settingsClient = LocationServices.getSettingsClient(this);
settingsClient.checkLocationSettings(locationSettingsRequest);
final LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
if( !locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){
showGPSDisabledAlertToUser();
}
return;
else {
// new Google API SDK v11 uses getFusedLocationProviderClient(this)
LocationServices.getFusedLocationProviderClient(this).requestLocationUpdates(mLocationRequest, new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
// do work here
onLocationChanged(locationResult.getLastLocation());
}
},
Looper.myLooper());
}
}
在oncreate中添加以下代码:
public static double longitude = 0.0d;
public static double latitude = 0.0d;
private FusedLocationProviderClient mFusedLocationClient;
private long UPDATE_INTERVAL = 30 * 1000; /* 10 secs */
private long FASTEST_INTERVAL = 2000; /* 2 sec */
protected void startLocationUpdates() {
LocationRequest mLocationRequest = new LocationRequest();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(UPDATE_INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
// Create LocationSettingsRequest object using location request
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
builder.addLocationRequest(mLocationRequest);
LocationSettingsRequest locationSettingsRequest = builder.build();
// Check whether location settings are satisfied
// https://developers.google.com/android/reference/com/google/android/gms/location/SettingsClient
SettingsClient settingsClient = LocationServices.getSettingsClient(this);
settingsClient.checkLocationSettings(locationSettingsRequest);
final LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
if( !locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){
showGPSDisabledAlertToUser();
}
return;
else {
// new Google API SDK v11 uses getFusedLocationProviderClient(this)
LocationServices.getFusedLocationProviderClient(this).requestLocationUpdates(mLocationRequest, new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
// do work here
onLocationChanged(locationResult.getLastLocation());
}
},
Looper.myLooper());
}
}
您可以使用以下代码:
public static double longitude = 0.0d;
public static double latitude = 0.0d;
private FusedLocationProviderClient mFusedLocationClient;
private long UPDATE_INTERVAL = 30 * 1000; /* 10 secs */
private long FASTEST_INTERVAL = 2000; /* 2 sec */
protected void startLocationUpdates() {
LocationRequest mLocationRequest = new LocationRequest();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(UPDATE_INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
// Create LocationSettingsRequest object using location request
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
builder.addLocationRequest(mLocationRequest);
LocationSettingsRequest locationSettingsRequest = builder.build();
// Check whether location settings are satisfied
// https://developers.google.com/android/reference/com/google/android/gms/location/SettingsClient
SettingsClient settingsClient = LocationServices.getSettingsClient(this);
settingsClient.checkLocationSettings(locationSettingsRequest);
final LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
if( !locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){
showGPSDisabledAlertToUser();
}
return;
else {
// new Google API SDK v11 uses getFusedLocationProviderClient(this)
LocationServices.getFusedLocationProviderClient(this).requestLocationUpdates(mLocationRequest, new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
// do work here
onLocationChanged(locationResult.getLastLocation());
}
},
Looper.myLooper());
}
}
在oncreate中添加以下代码:
public static double longitude = 0.0d;
public static double latitude = 0.0d;
private FusedLocationProviderClient mFusedLocationClient;
private long UPDATE_INTERVAL = 30 * 1000; /* 10 secs */
private long FASTEST_INTERVAL = 2000; /* 2 sec */
protected void startLocationUpdates() {
LocationRequest mLocationRequest = new LocationRequest();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(UPDATE_INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
// Create LocationSettingsRequest object using location request
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
builder.addLocationRequest(mLocationRequest);
LocationSettingsRequest locationSettingsRequest = builder.build();
// Check whether location settings are satisfied
// https://developers.google.com/android/reference/com/google/android/gms/location/SettingsClient
SettingsClient settingsClient = LocationServices.getSettingsClient(this);
settingsClient.checkLocationSettings(locationSettingsRequest);
final LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
if( !locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)){
showGPSDisabledAlertToUser();
}
return;
else {
// new Google API SDK v11 uses getFusedLocationProviderClient(this)
LocationServices.getFusedLocationProviderClient(this).requestLocationUpdates(mLocationRequest, new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
// do work here
onLocationChanged(locationResult.getLastLocation());
}
},
Looper.myLooper());
}
}
public void onLocationChanged(Location-Location){//New-Location现在已确定String msg=“Updated-Location:”+Double.toString(Location.getLatitude())+“,“+Double.toString(Location.getLatitude());latitude=Location.getLatitude();longide=Location.getLatitude()();}private void showGPSDisabledAlertToUser(){Intent callGPSSettingcontent=new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_Settings);startActivity(callGPSSettingcontent);}public void onLocationChanged(LOCATION-LOCATION){//New location现已确定String msg=“更新的位置:“+Double.toString(location.getLatitude())+”,“+Double.toString(location.getLatitude());latitude=location.getLatitude();latitude=location.getLatitude();}私有void ShowGPSDisableAlertToUser(){Intent callgpssettingcontent=newintent(android.provider.Settings.ACTION\u LOCATION\u SOURCE\u Settings);startActivity(callgpssettingcontent);}