我有这个活动，崩溃的原因是java.lang.AbstractMethodError：未实现抽象方法，我该如何解决？就像我使一些未实现的活动变得活跃起来，但我不知道如何解决！我多次面对这个问题，我不知道如何解决！
public class SelectEndPoint extends AppCompatActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener {
private GoogleMap mMap;
private GoogleApiClient mGoogleApiClient;
private final static int PLAY_SERVICES_RESOLUTION_REQUEST = 9000;
private static String TAG = "MAP LOCATION";
Context mContext;
TextView mLocationMarkerText;
private LatLng mCenterLatLong;
/**
* Receiver registered with this activity to get the response from FetchAddressIntentService.
*/
private AddressResultReceiver mResultReceiver;
/**
* The formatted location address.
*/
protected String mAddressOutput;
protected String mAreaOutput;
protected String mCityOutput;
protected String mStateOutput;
EditText mLocationAddress;
TextView mLocationText;
private …