有人可以帮我解决问题：
onConnected()方法为什么我的
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
代码未执行;并从checkSelfPermission()
如何在此代码中正确使用FusedLocationApi
我的代码在
之下public class JMSCLocationService extends Service implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
private final String TAG = "MyAwesomeApp";
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
// Check Permissions Now
private static final int REQUEST_LOCATION = 2;
//private final double radiusInMeters = 1609.34;
private final double radiusInMeters = 16.34;
LatLng firstLatLong;
Location fLoc;
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
Log.i(TAG, "GoogleApiClient connection has STARTED");
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
firstLatLong = new LatLng(0, 0);
Log.i(TAG, "GoogleApiClient connection has STARTED");
}
@Override
public void onDestroy() {
// disconnect the client.
if (mGoogleApiClient != null && mGoogleApiClient.isConnected())
mGoogleApiClient.disconnect();
super.onDestroy();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// Connect the client.
if (mGoogleApiClient != null && !mGoogleApiClient.isConnected()) {
mGoogleApiClient.connect();
Log.i(TAG, "GoogleApiClient mGoogleApiClient.connect();");
}
if (mGoogleApiClient.isConnected()) {
Log.i(TAG, "GoogleApiClient mGoogleApiClient.isConnected();");
}
return super.onStartCommand(intent, flags, startId);
}
@Override
public void onConnected(@Nullable Bundle bundle) {
mLocationRequest = LocationRequest.create();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(1000); // Update location every second
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;
}
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
@Override
public void onConnectionSuspended(int i) {
Log.i(TAG, "GoogleApiClient connection has been suspend");
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
Log.i(TAG, "GoogleApiClient connection has failed");
}
@Override
public void onLocationChanged(Location mCurrentLocation) {
Log.i(TAG, "GoogleApiClient Location received: " + mCurrentLocation.toString());
//test outside
double mLatitude = mCurrentLocation.getLatitude();
double mLongitude = mCurrentLocation.getLongitude();
if(firstLatLong.latitude == 0.0 && firstLatLong.longitude == 0.0){
firstLatLong = new LatLng(mLatitude,mLongitude);
fLoc=new Location(mCurrentLocation);
}
float[] results = new float[1];
Location.distanceBetween(firstLatLong.latitude, firstLatLong.longitude,
mLatitude, mLongitude, results);
float distanceInMeters = fLoc.distanceTo(mCurrentLocation);
try{
if( distanceInMeters > radiusInMeters ){
Toast.makeText(getBaseContext(), "Outside, distance from center", Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getBaseContext(), "Inside, distance from center", Toast.LENGTH_LONG).show();
}
}catch (Exception ex){
ex.printStackTrace();
}
}
}
答案 0 :(得分：0)
您必须请求权限。您只是检查您的应用是否拥有此权限。
您忽略了代码中checkSelfPermission()的结果。
阅读评论，它们是不言自明的。
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) {
// 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;
} else {
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
阅读以下内容请求运行时权限：
我想通过 ...但是在服务的编译时，它给出了必须使用自检权限的错误 你的意思是Lint警告。
您可以通过在您调用@SuppressWarnings("MissingPermission")的方法之上添加requestLocationUpdates()来禁止它们。
但如果您拥有的权限（请注意requestLocationUpdates()阻止），请确保您正在呼叫if..else。
答案 1 :(得分：0)
使用：
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
REQUEST_ID);
}else{
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
和
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case REQUEST_ID: {
for( int i = 0; i < permissions.length; i++ ) {
if( grantResults[i] == PackageManager.PERMISSION_GRANTED) {
Log.d("Permissions", "Permission Granted: " + permissions[i]);
} else if( grantResults[i] == PackageManager.PERMISSION_DENIED ) {
Log.d( "Permissions", "Permission Denied: " + permissions[i] );
}
}
}
break;
default:
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}