I''m下面这个教程但到目前为止，我不能让它工作，虽然这是从一年前左右...

我使用androidStudo 1.2.2和FacebookSDK 4。

我想要一个简单的登录到Facebook的使用自定义的按钮，就像这个图片所示：

现在，从指南中，我有问题的会话变量的例子，它说，它解决不了的，也不 getActivity（ ）

有naybody尝试这样的FacebookSDK4.0？

那是一个正确的做法或许有更多的东西更新？

在此先感谢！

第1步： 首先添加的FrameLayout，并让Facebook按钮的知名度=水涨船高，并添加自定义按钮。 不要忘了的xmlns：Facebook的=htt​​p://schemas.android.com/apk/res-auto在主布局

第二步： 在的onCreate 初始化 FacebookSdk 活用布局之前。

第三步：添加到您的Java文件这个

第四步： 不要忘记添加以下code。

第五步： 设置您的自定义按钮，点击按钮FacebookLogin点击。

第6步： 对于编程注销使用。

第7步：你可以找到用户登录或不配置文件。

I''m following this Tutorial but so far I can't make it work, though this is from a year ago or so...

I'm using androidStudo 1.2.2 and FacebookSDK 4.

I want a simple login into facebook using a custom button, like the one shown in this image:

Now, in the example from the tutorial I'm having problems with the Session variable, it says it cannot resolve it, neither getActivity()

Has naybody tried this on FacebookSDK4.0?

Is that a correct approach or maybe there is something more updated?

Thanks in advance!

Step 1: First add FrameLayout and make facebook button visibility="gone" and add your custom button. Don't forgot to put xmlns:facebook="http://schemas.android.com/apk/res-auto" in your main layout.

<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>

Step 2: Initialize FacebookSdk in onCreate before inflecting layout.

FacebookSdk.sdkInitialize(this.getApplicationContext());

Step 3: add this into your java file.

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());
	}
});

Step 4: Don't forget to add following code.

@Override
protected void onActivityResult(int requestCode, int responseCode,
Intent data) {
	super.onActivityResult(requestCode, responseCode, data);
	callbackManager.onActivityResult(requestCode, responseCode, data);
}

Step 5: Set your custom button click to FacebookLogin button click.

 
public void onClick(View v) {
 	if (v == fb) {
 		loginButton.performClick();
 	}
 }

Step 6: For programmatically logout use this.

LoginManager.getInstance().logOut();

Step 7: you can find user logged in or not by profile.

profile = Profile.getCurrentProfile().getCurrentProfile();
if (profile != null) {
	// user has logged in
} else {
	// user has not logged in
}