如何在 android 中使用一个注销按钮实现 Facebook 和 Google 登录？

Question

你好朋友是 android、Facebook 和 google 的初学者以及使用单个注销按钮登录 android 应用程序

Answer 1

When the user logs in, you could store a variable, with a value of 'facebook' or 'google'. When you click the log out button, check the value of the variable, then do whatever you need based on that.

Answer 2

First intialize Facbook SDK with the below line of code on your user welcome activity.

FacebookSdk.sdkInitialize(getApplicationContext());

Then, create a logoutUser() method that should be called on logout button click, like below;

private void logoutUser() {
    LoginManager.getInstance().logOut(); // this is to logout Facebook

    Intent intent = new Intent(this, LoginActivity.class);
    intent.putExtra("finish", true); // if you are checking for this in your other Activities
    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
            Intent.FLAG_ACTIVITY_CLEAR_TASK |
            Intent.FLAG_ACTIVITY_NEW_TASK |
            Intent.FLAG_ACTIVITY_NO_ANIMATION |
            Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
    startActivity(intent);
    finish(); // This will kill all current logged in activities
}

Call this one method through one logout button onClickListner n thats it.