Android Activity.getParent() always returning null

问题:

I have this little function here:

public Activity getRootActivity() {     Activity a = this;     while (a.getParent() != null)         a = a.getParent();     return a; } 

But a.getParent() always returns null. It doesn't seem to matter how deep into my UI I go, it will always return null.

Anybody have any idea as to why?

EDIT

Here is how I am starting Activities (within other activities)

startActivity(new Intent(this, activityname.class)); 

Apparently that means I'm not 'embedding' them? How does one 'embed' them?

回答1:

Documentation says: public final Activity getParent () Since: API Level 1

Return the parent activity if this view is an embedded child.

Is your Activity an embedded child?

回答2:

Activity#getParent():

Return the parent activity if this view is an embedded child.

Is the activity an embedded child? If not, getParent() will return null.

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