android GPS JAVA 获取GPS功能是否禁用

获取GPS功能是否禁用：

mgr=(LocationManager)getSystemService(LOCATION_SERVICE);

    if(mgr.isProviderEnabled((android.location.LocationManager.GPS_PROVIDER )))
    Toast.makeText(TestActivity.this,"gps enable", Toast.LENGTH_SHORT).show();
    else Toast.makeText(TestActivity.this,"gps dis", Toast.LENGTH_SHORT).show();