但是所有其他设备都获得了正确的位置，有一种奇怪的行为，谷歌地图和whatsapp在HTC欲望中获得了确切的位置，但我的应用程序没有得到位置。请帮助我，这种行为给我带来了很多问题。请尽早提供帮助。
public class GPSTracker extends Service implements LocationListener {
private final Context mContext;
// flag for GPS status
boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = false;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;
private static final int REQUEST_CODE_PERMISSION_LOCATION = 4;
String mPermission = Manifest.permission.ACCESS_COARSE_LOCATION;
public GPSTracker(Context context) {
this.mContext = context;
getLocation();
}
public Location getLocation() {
try {
locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
isNetworkEnabled = locationManager
.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
} else {
this.canGetLocation = true;
// First get location from Network Provider
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
if (ActivityCompat.checkSelfPermission((Activity)mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, 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.
try {
ActivityCompat.requestPermissions((Activity) mContext, new String[]{mPermission},
REQUEST_CODE_PERMISSION_LOCATION);
// If any permission above not allowed by user, this condition will execute every time, else your else part will work
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
// Log.d("GPS Enabled", "GPS Enabled");
// if (locationManager != null) {
// location = locationManager
// .getLastKnownLocation(LocationManager.GPS_PROVIDER);
//
// if (location != null) {
// latitude = location.getLatitude();
// longitude = location.getLongitude();
// }
// }
if (isNetworkEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
if (location==null){
try {
location = locationManager.getLastKnownLocation(locationManager.getBestProvider(new Criteria(), true));
} catch(NullPointerException e) {}
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
if (location==null){
location=new Location("");
location.setLatitude(0);
location.setLongitude(0);
return location;
}else
return location;
}
/**
* Stop using GPS listener
* Calling this function will stop using GPS in your app
* */
public void stopUsingGPS(){
if(locationManager != null){
locationManager.removeUpdates(GPSTracker.this);
}
}
/**
* Function to get latitude
* */
public double getLatitude(){
if(location != null){
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude(){
if(location != null){
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
/**
* Function to check GPS/wifi enabled
* @return boolean
* */
public boolean canGetLocation() {
return this.canGetLocation;
}
/**
* Function to show settings alert dialog
* On pressing Settings button will lauch Settings Options
* */
public void showSettingsAlert(){
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle("GPS is settings");
// Setting Dialog Message
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
// On pressing Settings button
alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
@Override
public void onLocationChanged(Location location) {
latitude=location.getLatitude();
latitude=location.getLongitude();
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public IBinder onBind(Intent arg0) {
return null;
}
}
getLocation(( 总是在 HTC desire 626 模型上返回空对象。
Build.gradel (App：level(
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "com.bingoit.blaze"
minSdkVersion 15
targetSdkVersion 25
versionCode 2
versionName "1.1"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile files('libs/ksoap2-android-assembly-3.6.2-jar-with-dependencies.jar')
compile 'com.android.support:design:25.3.1'
compile 'com.android.support:design:25.3.1'
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support:cardview-v7:25.3.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
compile 'net.bohush.geometricprogressview:geometricprogressview:1.1.1'
compile 'com.android.support:percent:25.3.1'
compile 'com.squareup.picasso:picasso:2.4.0'
compile 'com.google.android.gms:play-services-maps:10.2.6'
testCompile 'junit:junit:4.12'
compile 'com.weiwangcn.betterspinner:library-material:1.1.0'
compile 'com.github.chrisbanes:PhotoView:2.0.0'
}
是否已向应用清单文件添加权限？
android.permission.ACCESS_COARSE_LOCATION
或
android.permission.ACCESS_FINE_LOCATION