Android 如何在打开首选项屏幕上打开EditTextPreference

我想在打开首选项屏幕时打开EditTextPreference。我试着

mLabel = (EditTextPreference) findPreference("labelKey");
mLabel.getDialog().show() // this does not work. getDialog return null
mLable.getEditText().requestFocus(); // this does not work too.

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我怎样才能做到这一点？

如果我理解正确，您需要在打开首选项（？？）后立即在首选项屏幕中打开单个首选项

您可能想看看这个：

// the preference screen your item is in must be known
PreferenceScreen screen = (PreferenceScreen) findPreference("pref_key");

// the position of your item inside the preference screen above
int pos = findPreference("abc").getOrder();

// simulate a click / call it!!
screen.onItemClick( null, null, pos, 0 );