我可以编写获取用户位置的代码，并且在 API < 23 中运行良好。但是在 API 23 及更高版本中，我的代码在日志中不返回任何内容。
更多详情:
我手动启用设备的 GPS。
在第一次运行应用程序请求权限并且没有日志返回。
在下次运行该应用程序时，返回我准备好的 Toast(检查您的提供商)。
这是我写的代码:
public class MainActivity extends AppCompatActivity implements LocationListener {
private static final int MY_PERMISSIONS_REQUEST_COARSE_LOCATION = 124;
private static final int MY_PERMISSIONS_REQUEST_FINE_LOCATION = 123;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Here, thisActivity is the current activity
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_FINE_LOCATION)) {
} else {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_FINE_LOCATION);
}
}
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_COARSE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_COARSE_LOCATION)) {
} else {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_COARSE_LOCATION},
MY_PERMISSIONS_REQUEST_COARSE_LOCATION);
}
}
if (ActivityCompat.checkSelfPermission(this, 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.
return;
}
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
String provider = locationManager.getBestProvider(new Criteria(), false);
Location location = locationManager.getLastKnownLocation(provider);
if (location == null) {
Toast.makeText(this, "Check your provider", Toast.LENGTH_SHORT).show();
} else {
Log.i("New Location", "lat: " + location.getLatitude());
Log.i("New Location", "lng: " + location.getLongitude());
}
}
@Override
public void onLocationChanged(Location location) {
Log.i("Location", "lat: " + location.getLatitude());
Log.i("Location", "lng: " + location.getLongitude());
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
最佳答案
在 Android API 23+ 中，有一种新的方法来处理被视为“危险”的权限，这就是 android.permission.ACCESS_FINE_LOCATION 和 android.permission.ACCESS_COARSE_LOCATION等等。
如果您已经在使用 android.permission.ACCESS_FINE_LOCATION，则无需处理 android.permission.ACCESS_COARSE_LOCATION。
请查看官方文档中的此链接，该链接向您展示了如何在 Android API 23+ 中在运行时处理权限。
https://developer.android.com/training/permissions/requesting.html
这个也可能对您有所帮助。
https://developer.android.com/guide/topics/location/strategies.html
如何检查权限:
int permissionCheck = ContextCompat.checkSelfPermission(thisActivity,
Manifest.permission.ACCESS_FINE_LOCATION);
如何请求权限:
if (ContextCompat.checkSelfPermission(thisActivity,
Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
Manifest.permission.ACCESS_FINE_LOCATION)) {
// Show an expanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(thisActivity,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION);
// MY_PERMISSIONS_REQUEST_ACCESS_FINE_LOCATION is an
// app-defined int constant. The callback method gets the
// result of the request.
}
}
请注意，即使您在运行时请求权限，您仍然必须像这样在 android list 中保留权限条目:
<manifest ... >
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
...
<!-- Needed only if your app targets Android 5.0 (API level 21) or higher. -->
<uses-feature android:name="android.hardware.location.gps" />
...
</manifest>
检查并授予权限后，您应该查看带有上述位置策略的链接，在那里您可以找到您缺少的内容的详细信息。
基本上您没有注册监听器来接收位置更新。在 onCreate() 方法末尾添加此行后，您应该开始在日志中看到位置更新。
// Register the listener with the Location Manager to receive location updates
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, this);
关于android - 在android API 23中获取用户的位置，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39934318/