我正在学习这个教程,但到目前为止,我还无法使其正常工作,尽管这是大约一年前的内容...
我正在使用Android Studio 1.2.2和FacebookSDK 4。
我想要通过一个自定义按钮简单地登录Facebook,就像在这张图片中所示:
现在,在教程的示例中,我遇到了Session
变量的问题,它说无法解决它,也无法解决getActivity()
有人已经在FacebookSDK4.0上尝试过吗?
这是正确的方法,还是可能有更更新的东西吗?
我正在学习这个教程,但到目前为止,我还无法使其正常工作,尽管这是大约一年前的内容...
我正在使用Android Studio 1.2.2和FacebookSDK 4。
我想要通过一个自定义按钮简单地登录Facebook,就像在这张图片中所示:
现在,在教程的示例中,我遇到了Session
变量的问题,它说无法解决它,也无法解决getActivity()
有人已经在FacebookSDK4.0上尝试过吗?
这是正确的方法,还是可能有更更新的东西吗?
步骤1:
首先添加FrameLayout并使Facebook按钮visibility="gone",然后添加自定义按钮。
不要忘记在主布局中加入xmlns:facebook="http://schemas.android.com/apk/res-auto"
。
<FrameLayout
android:id="@+id/FrameLayout1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<com.facebook.login.widget.LoginButton
android:id="@+id/login_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone" />
<Button
android:id="@+id/fb"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#416BC1"
android:onClick="onClick"
android:text="FaceBook"
android:textColor="#ffffff"
android:textStyle="bold" />
</FrameLayout>
第二步:在设置布局前,在 onCreate
方法中初始化 FacebookSdk
。
FacebookSdk.sdkInitialize(this.getApplicationContext());
第三步:将此代码添加到您的 Java 文件中。
callbackManager = CallbackManager.Factory.create();
fb = (Button) findViewById(R.id.fb);
loginButton = (LoginButton) findViewById(R.id.login_button);
List < String > permissionNeeds = Arrays.asList("user_photos", "email",
"user_birthday", "public_profile", "AccessToken");
loginButton.registerCallback(callbackManager,
new FacebookCallback < LoginResult > () {@Override
public void onSuccess(LoginResult loginResult) {
System.out.println("onSuccess");
String accessToken = loginResult.getAccessToken()
.getToken();
Log.i("accessToken", accessToken);
GraphRequest request = GraphRequest.newMeRequest(
loginResult.getAccessToken(),
new GraphRequest.GraphJSONObjectCallback() {@Override
public void onCompleted(JSONObject object,
GraphResponse response) {
Log.i("LoginActivity",
response.toString());
try {
id = object.getString("id");
try {
URL profile_pic = new URL(
"http://graph.facebook.com/" + id + "/picture?type=large");
Log.i("profile_pic",
profile_pic + "");
} catch (MalformedURLException e) {
e.printStackTrace();
}
name = object.getString("name");
email = object.getString("email");
gender = object.getString("gender");
birthday = object.getString("birthday");
} catch (JSONException e) {
e.printStackTrace();
}
}
});
Bundle parameters = new Bundle();
parameters.putString("fields",
"id,name,email,gender, birthday");
request.setParameters(parameters);
request.executeAsync();
}
@Override
public void onCancel() {
System.out.println("onCancel");
}
@Override
public void onError(FacebookException exception) {
System.out.println("onError");
Log.v("LoginActivity", exception.getCause().toString());
}
});
第四步:不要忘记添加以下代码。
@Override
protected void onActivityResult(int requestCode, int responseCode,
Intent data) {
super.onActivityResult(requestCode, responseCode, data);
callbackManager.onActivityResult(requestCode, responseCode, data);
}
第五步:将自定义按钮点击事件设置为Facebook登录按钮的点击事件。
public void onClick(View v) {
if (v == fb) {
loginButton.performClick();
}
}
步骤6: 要进行编程登出,请使用以下代码。
LoginManager.getInstance().logOut();
步骤7:您可以通过个人资料查找用户是否已登录。
profile = Profile.getCurrentProfile().getCurrentProfile();
if (profile != null) {
// user has logged in
} else {
// user has not logged in
}
依我看,所选答案中的部分是一种“变通方法”,而不是正确的解决方案。因此,要使其正确,需要进行以下更改:
从您的XML中删除“com.facebook.login.widget.LoginButton”
<com.facebook.login.widget.LoginButton
android:id="@+id/login_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone" />
在你的Java代码中清除所有有关"LoginButton"的引用
使用Facebook的"LoginManager"类,该类专门用于此目的,操作如下:
@Override
protected void onCreate(Bundle savedInstanceState) {
// Some code
callbackManager = CallbackManager.Factory.create();
LoginManager.getInstance().registerCallback(
callbackManager,
new FacebookCallback < LoginResult > () {
@Override
public void onSuccess(LoginResult loginResult) {
// Handle success
}
@Override
public void onCancel() {
}
@Override
public void onError(FacebookException exception) {
}
}
);
}
public void onClick(View v) {
if (v == fb) {
LoginManager.getInstance().logInWithReadPermissions(
this,
Arrays.asList("user_photos", "email", "user_birthday", "public_profile")
);
}
}
// this part was missing thanks to wesely
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
}
LoginManager
的状态,您可能希望将按钮的标签从“登录”更新为“注销”。 - ViliusK这很简单。在布局文件中添加一个按钮,例如:
<Button
android:layout_width="200dp"
android:layout_height="wrap_content"
android:text="Login with facebook"
android:textColor="#ffff"
android:layout_gravity="center"
android:textStyle="bold"
android:onClick="fbLogin"
android:background="@color/colorPrimary"/>
在onClick事件中,放置LoginManager的registercallback()方法。由于该方法会自动执行,因此需要这么做。
例如:
public void fbLogin(View view)
{
// Before Edit:
// LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList("user_photos", "email", "public_profile", "user_posts" , "AccessToken"));
LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList("user_photos", "email", "public_profile", "user_posts"));
LoginManager.getInstance().logInWithPublishPermissions(this, Arrays.asList("publish_actions"));
LoginManager.getInstance().registerCallback(callbackManager,
new FacebookCallback<LoginResult>()
{
@Override
public void onSuccess(LoginResult loginResult)
{
// App code
}
@Override
public void onCancel()
{
// App code
}
@Override
public void onError(FacebookException exception)
{
// App code
}
});
}
玩得开心
(没有足够的声望来添加评论...)
我尝试了@Shehabix的答案,但在添加以下内容之前无法接收回调
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
}
那么它正常工作。
<!-- connect with Facebook -->
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<com.facebook.login.widget.LoginButton
android:id="@+id/fb_connect"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:textSize="@dimen/login_fb_font_size"
android:visibility="invisible" />
<LinearLayout
android:id="@+id/mfb_connect"
style="@style/facebook_button">
<ImageView
style="@style/login_connect_icon"
android:src="@drawable/ic_facebook" />
<TextView
style="@style/login_connect_text"
android:text="@string/login_connect_facebook" />
</LinearLayout>
</RelativeLayout>
...
private LoginButton fb_connect;
private LinearLayout mfb_connect;
...
// the button from facebook sdk
fb_connect = (LoginButton) findViewById(R.id.fb_connect);
// handle the click from my custom button to perfrom action click on facebook sdk button
mfb_connect = (LinearLayout) findViewById(R.id.mfb_connect);
mfb_connect.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
fb_connect.performClick();
}
});
那将实现这个效果:
public class SignInFragment extends Fragment implements
FragmentChangeListener{
private Button facebook
private FirebaseAuth firebaseAuth;
private CallbackManager mCallBackManager;
private LoginButton loginButton;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_sign_in, container, false);
facebook = view.findViewById(R.id.facebookButton);
loginButton = view.findViewById(R.id.facebookBtn);
firebaseAuth = FirebaseAuth.getInstance();
facebook.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
loginButton.callOnClick();
}
});
loginButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mCallBackManager = CallbackManager.Factory.create();
loginButton.setFragment(SignInFragment.this);
loginButton.setPermissions("email","public_profile");
loginButton.registerCallback(mCallBackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
handleFacebookAccessToken(loginResult.getAccessToken());
}
@Override
public void onCancel() {
Toast.makeText(getContext(),"Is Cancelled",Toast.LENGTH_LONG).show();
}
@Override
public void onError(FacebookException error) {
Toast.makeText(getContext(),error.getMessage(),Toast.LENGTH_LONG).show();
}
});
}
});
return view;
}
@Override
public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
mCallBackManager.onActivityResult(requestCode, resultCode, data);
}
private void handleFacebookAccessToken(AccessToken token) {
AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
firebaseAuth.signInWithCredential(credential)
.addOnCompleteListener(getActivity(), new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
// Sign in success, update UI with the signed-in user's information
FirebaseUser user = firebaseAuth.getCurrentUser();
startActivity(new Intent(getContext(),MainActivity.class));
} else {
// If sign in fails, display a message to the user.
Toast.makeText(getContext(), task.getException().getMessage(),
Toast.LENGTH_SHORT).show();
}
}
});
}
}
private void handleFacebookAccessToken(AccessToken token) {
AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
mAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
//Toast.makeText(MainActivity.this, "Autenticando",Toast.LENGTH_SHORT).show();
} else {
// If sign in fails, display a message to the user.
Toast.makeText(MainActivity.this, "Authentication failed.",
Toast.LENGTH_SHORT).show();
//updateUI(null);
}
}
});
}
try this
// Facebook Button
LoginButton loginButton = findViewById(R.id.loginbtn);
loginButton.setVisibility(View.GONE)
// Your Custom Button
binding.fbBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
loginButton.callOnClick();
}
});