Merge pull request #42 from vanniktech/isLocationPermissionGranted

Add helper method isLocationPermissionGranted.

rxbluetooth/src/main/java/com/github/ivbaranov/rxbluetooth/RxBluetooth.java

@@ -25,7 +25,7 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
-import android.os.Build;
+import android.content.pm.PackageManager;
 import android.text.TextUtils;
 import com.github.ivbaranov.rxbluetooth.events.AclEvent;
 import com.github.ivbaranov.rxbluetooth.events.BondStateEvent;
@@ -43,6 +43,9 @@
 import java.util.UUID;
 import java.util.concurrent.Callable;
 
+import static android.Manifest.permission.ACCESS_COARSE_LOCATION;
+import static android.os.Build.VERSION.SDK_INT;
+
 /**
  * Enables clients to listen to bluetooth events using RxJava Observables.
  */
@@ -77,6 +80,20 @@ public boolean isBluetoothEnabled() {
     return bluetoothAdapter.isEnabled();
   }
 
+  /**
+   * Return true if Location permission is granted.
+   *
+   * @return true if the local permission is granted. Pre 23 it will always return true. Post 22
+   * it will ask the Context whether the permission has been granted or not.
+   */
+  public boolean isLocationPermissionGranted() {
+    if (SDK_INT >= 23) {
+      return context.checkSelfPermission(ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED;
+    }
+
+    return true;
+  }
+
   /**
    * This will issue a request to enable Bluetooth through the system settings (without stopping
    * your application) via ACTION_REQUEST_ENABLE action Intent.
@@ -513,7 +530,7 @@ public Observable<BluetoothSocket> observeConnectDevice(final BluetoothDevice bl
                 try {
                   bluetoothSocket.close();
                 } catch (IOException suppressed) {
-                  if (Build.VERSION.SDK_INT >= 19) {
+                  if (SDK_INT >= 19) {
                     e.addSuppressed(suppressed);
                   }
                 }