onFinishInflate 在XML解析完毕后调用. 而setContentView(R.layout.activity_main)方法对xml进行解析和添加.setContentView最终会调用LayoutInflater的inflate方法.
public View inflate(@LayoutRes int resource, @Nullable ViewGroup root) {
return inflate(resource, root, root != null);
}
public View inflate(@LayoutRes int resource, @Nullable ViewGroup root, boolean attachToRoot) {
try {
return inflate(parser, root, attachToRoot);
} finally {
parser.close();
}
}
public View inflate(XmlPullParser parser, @Nullable ViewGroup root, boolean attachToRoot) {
synchronized (mConstructorArgs) {
try {
if (TAG_MERGE.equals(name)) {
rInflate(parser, root, inflaterContext, attrs, false);
} else {
rInflateChildren(parser, temp, attrs, true);
}
}
return result;
}
}
final void rInflateChildren(XmlPullParser parser, View parent, AttributeSet attrs,
boolean finishInflate) throws XmlPullParserException, IOException {
rInflate(parser, parent, parent.getContext(), attrs, finishInflate);
}
void rInflate(XmlPullParser parser, View parent, Context context,
AttributeSet attrs, boolean finishInflate) throws XmlPullParserException, IOException {
//这里回调onFinishInflate方法
if (finishInflate) {
parent.onFinishInflate();
}
}
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