Android 检查用户是否已登录

我正在使用

SharedReferences

检查用户是否登录。 如果用户未登录，他将被带到登录活动（或“我的信息”活动）

SharedPreferences settings = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
editor.putBoolean("logged", true); // set it to false when the user is logged out
editor.commit(); // Commit the edits!

我的代码如下

这是在登录活动中

SharedPreferences settings = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
editor.putBoolean("logged", true); // set it to false when the user is logged out
editor.commit(); // Commit the edits!

我在主要活动中检查代码，如下所示

SharedPreferences settings = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
boolean loggedIn = settings.getBoolean("logged", true);
if (loggedIn != true) {
    // Toast.makeText(this,"you are logged in !!",3000).show();
    /* Intent i = new Intent(this,Login.class);
     startActivity(i);*/
    Intent intent = new
    Intent(MymainScreen.this, Registered.class);
    startActivity(intent);
} else {
    // Toast.makeText(this,"you are not logged in !!",3000).show();
    Intent intent = new
    Intent(MymainScreen.this, My_info.class);
    startActivity(intent);
}

---

请帮助我，没有此活动，我无法进一步发展。

据我所知，您想使用

SharedReferences检查登录状态，默认情况下您应该认为用户已注销。因此，当
SharedReferences
中没有任何内容时，您应该将默认值设置为
false
not
true

SharedPreferences settings = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
editor.putBoolean("logged", true); // set it to false when the user is logged out
editor.commit(); // Commit the edits!

SharedPreferences prefs = getSharedPreferences(PREF_NAME, MODE_PRIVATE);
Intent intent = null;
if (prefs.getBoolean("logged_in", false)) { //user logged in before
    intent = new Intent(this, Info.class);
} else {
    intent = new Intent(this, Registration.class);
}

startActivity(intent);

希望它能帮助你
 它只接受一个条件，没有设置状态。我已经将我的putboolean方法放在了login bitton下的onclick方法中