在Android中登录的Facebook API代码很简单，方法 onActivityResult
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
}
Google提供的文档说明相同方法的代码必须是
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Log.d(TAG, "onActivityResult:" + requestCode + ":" + resultCode + ":" + data);
if (requestCode == RC_SIGN_IN) {
// If the error resolution was not successful we should not resolve further.
if (resultCode != RESULT_OK) {
mShouldResolve = false;
}
mIsResolving = false;
mGoogleApiClient.connect();
}
}
假设声明并初始化所有变量。为了处理Facebook和G +登录，onActivityResult的代码必须是什么。
我的登录（活动）代码是
package cc.campusconnect.devapp;
import android.content.Intent;
import android.content.IntentSender;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import com.facebook.AccessToken;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.GraphRequest;
import com.facebook.GraphResponse;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.Scopes;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.Scope;
import com.google.android.gms.plus.Plus;
import org.json.JSONException;
import org.json.JSONObject;
public class Login extends AppCompatActivity implements
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
View.OnClickListener{
private static final String TAG = "Login";
LoginButton btnFBLogin;
CallbackManager callbackManager;
private static final int RC_SIGN_IN = 0;
private GoogleApiClient mGoogleApiClient;
/* Is there a ConnectionResult resolution in progress? */
private boolean mIsResolving = false;
/* Should we automatically resolve ConnectionResults when possible? */
private boolean mShouldResolve = false;
/* Request code used to invoke sign in user interactions. */
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getApplicationContext());
setContentView(R.layout.login);
callbackManager = CallbackManager.Factory.create();
btnFBLogin = (LoginButton) findViewById(R.id.fblogin);
btnFBLogin.setReadPermissions("public_profile email");
btnFBLogin.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
// App code
if (AccessToken.getCurrentAccessToken() != null) {
GraphRequest request = GraphRequest.newMeRequest(AccessToken.getCurrentAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
@Override
public void onCompleted(JSONObject object, GraphResponse response) {
JSONObject json = response.getJSONObject();
try {
if (json != null) {
String text = "<b>Name :</b> " + json.getString("name") + "<br><br><b>Email :</b> " + json.getString("email") + "<br><br><b>Profile link :</b> " + json.getString("link");
}
} catch (JSONException e) {
e.printStackTrace();
}
}
});
}
}
@Override
public void onCancel() {
// App code
}
@Override
public void onError(FacebookException exception) {
// App code
}
});
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(Plus.API)
.addScope(new Scope(Scopes.PROFILE))
.build();
findViewById(R.id.sign_in_button).setOnClickListener(this);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
}
@Override
public void onConnected(Bundle bundle) {
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.sign_in_button) {
onSignInClicked();
}
}
private void onSignInClicked() {
// User clicked the sign-in button, so begin the sign-in process and automatically
// attempt to resolve any errors that occur.
mShouldResolve = true;
mGoogleApiClient.connect();
// Show a message to the user that we are signing in.
System.out.println("Signing in...");
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
// Could not connect to Google Play Services. The user needs to select an account,
// grant permissions or resolve an error in order to sign in. Refer to the javadoc for
// ConnectionResult to see possible error codes.
Log.d(TAG, "onConnectionFailed:" + connectionResult);
if (!mIsResolving && mShouldResolve) {
if (connectionResult.hasResolution()) {
try {
connectionResult.startResolutionForResult(this, RC_SIGN_IN);
mIsResolving = true;
} catch (IntentSender.SendIntentException e) {
Log.e(TAG, "Could not resolve ConnectionResult.", e);
mIsResolving = false;
mGoogleApiClient.connect();
}
} else {
// Could not resolve the connection result, show the user an
// error dialog.
//showErrorDialog(connectionResult);
System.out.println("Couldn't connect");
}
} else {
// Show the signed-out UI
//showSignedOutUI();
System.out.println("Signed out");
}
}
@Override
protected void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
@Override
protected void onStop() {
super.onStop();
mGoogleApiClient.disconnect();
}
}
答案 0 :(得分：8)
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
Log.d(TAG, "onActivityResult:" + requestCode + ":" + resultCode + ":" + data);
if (requestCode == RC_SIGN_IN) {
// If the error resolution was not successful we should not resolve further.
if (resultCode != RESULT_OK) {
mShouldResolve = false;
}
mIsResolving = false;
mGoogleApiClient.connect();
}else{
//If not request code is RC_SIGN_IN it must be facebook
callbackManager.onActivityResult(requestCode, resultCode, data);
}
}