java - getSerializableExtra 返回 null

Question

我的例子:

public static final String EXTRA_TARGET_FRAGMENT = "fragment_to_show";

    public static void show(Activity pActivity,
            Class<? extends Fragment> fragment) {
        Intent intent = new Intent(pActivity, HomeActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intent.putExtra(EXTRA_TARGET_FRAGMENT, fragment);
        pActivity.startActivity(intent);
    }

    @SuppressWarnings("unchecked")
    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        setIntent(intent);
        mUpcomingTarget = (Class<Fragment>) intent
                .getSerializableExtra(EXTRA_TARGET_FRAGMENT);

}

mUpcomingTarget --> null，我不明白这是什么问题。

Answer 1

putExtra(String, Serializable) 的文档说

The name must include a package prefix, for example the app com.android.contacts would use names like "com.android.contacts.ShowAll".

将您的 EXTRA_TARGET_FRAGMENT 更改为以包前缀开头。