[英]Facebook UiLifeCycleHelper in multiple activities
我正在尝试在我的应用程序中实现facebook sdk。 我有三个活动。 主要活动(用于Facebook登录),可与UiLifeCycleHelper配合使用。
private UiLifecycleHelper uiHelper;
private Session.StatusCallback statusCallback = new Session.StatusCallback() {
@Override
public void call(Session session, SessionState state,
Exception exception) {
onSessionStateChange(session, state, exception);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
uiHelper = new UiLifecycleHelper(this, statusCallback);
uiHelper.onCreate(savedInstanceState);
}
@Override
protected void onResume() {
super.onResume();
// For scenarios where the main activity is launched and user
// session is not null, the session state change notification
// may not be triggered. Trigger it if it's open/closed.
Session session = Session.getActiveSession();
if (session != null && (session.isOpened() || session.isClosed())) {
onSessionStateChange(session, session.getState(), null);
}
uiHelper.onResume();
}
@Override
protected void onPause() {
super.onPause();
uiHelper.onPause();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
uiHelper.onActivityResult(requestCode, resultCode, data);
}
@Override
protected void onDestroy() {
super.onDestroy();
uiHelper.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
Session session = Session.getActiveSession();
Session.saveSession(session, outState);
uiHelper.onSaveInstanceState(outState);
}
private void onSessionStateChange(Session session, SessionState state, Exception exception) {
if (state.isOpened()) {
Log.i(Consts.TAG, "Logged in...");
setCookies();
} else if (state.isClosed()) {
Log.i(Consts.TAG, "Logged out...");
}
}
但是我还有另外两个活动StepOneActivity和StepTwoActivity,它们也需要集成facebook sdk。 因此,在这些活动中我是否必须使用相同的UiLifeCycleHelper实例。 请告诉我如何在以startActivity(new Intent(this,StepOneActivity.class));
启动的StepOneActivity和StepTwoActivity中实现uilifecyclehelper startActivity(new Intent(this,StepOneActivity.class));
来自MainActivity。 我必须发布来自StepOneActivity的文本并邀请来自StepTwoActivity的朋友。
您可以创建一个FacebookActivity,它是所有需要Facebook实施的Activity的父类。
从父活动中,您将调用所有生命周期方法,而这三个活动均从FacebookActivity扩展
这样,您必须编写一次这些生命周期方法,并且如果您需要使用FB实现的另一个Activity,只需使其从FacebookActivity扩展即可
这是在Paint中创建的漂亮图形
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