Permissões Necessárias

Para utilizar o SDK Android será necessário adicionar algumas permissões em seu arquivo AndroidManifest.xml:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

A partir do Android 6.0 (API 23), os usuários concedem permissões a aplicativos enquanto eles estão em execução, e não quando são instalados, o exemplo abaixo mostra como solicitar permissão ao usuário:

// Here, thisActivity is the current activity
if (ContextCompat.checkSelfPermission(thisActivity,
  Manifest.permission.READ_CONTACTS)
  != PackageManager.PERMISSION_GRANTED) {
    // Should we show an explanation?
    if (ActivityCompat.shouldShowRequestPermissionRationale(thisActivity,
    Manifest.permission.READ_CONTACTS)) {

      // 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.READ_CONTACTS},
      MY_PERMISSIONS_REQUEST_READ_CONTACTS);
      // MY_PERMISSIONS_REQUEST_READ_CONTACTS is an
      // app-defined int constant. The callback method gets the
      // result of the request.
      }
}

Para maiores informações clique aqui