GoogleApiClient.ConnectionCallbacks 方法在连接到 GoogleApiClient 后未被调用

Question

我有一些连接到 GoogleApiClient 的代码，但没有调用 onConnected。

public class MainActivity extends Activity implements  GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
    private GoogleApiClient mApiClient;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initGoogleApiClient();
    }

    private void initGoogleApiClient() {
        mApiClient = new GoogleApiClient.Builder( this )
                .addApi( Wearable.API )
                .build();
        mApiClient.connect(); // On completion onConnected() will be called
    }
    @Override
    public void onConnected(Bundle bundle) {
    }

    @Override
    public void onConnectionSuspended(int i) {
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mApiClient.disconnect();
    }

    @Override
    public void onConnectionFailed(com.google.android.gms.common.ConnectionResult connectionResult) {
    }

None 四个@Override 方法中的一个被调用，这是为什么？

Answer 1

您需要在 GoogleApiClient.Builder:

上拨打 addConnectionCallbacks() and addOnConnectionFailedListener()

mApiClient = new GoogleApiClient.Builder( this )
    .addApi( Wearable.API )
    .addConnectionCallbacks(this)
    .addOnConnectionFailedListener(this)
    .build();