fragment/src/main/java/androidx/fragment/app/FragmentActivity.java
@Override
    protected void onStart() {
        super.onStart();

        mStopped = false;

        if (!mCreated) {
            mCreated = true;
            mFragments.dispatchActivityCreated();
        }

        mFragments.noteStateNotSaved();
        mFragments.execPendingActions();

        // NOTE: HC onStart goes here.

        mFragments.dispatchStart();
    }
/**
     * Dispatch onStart() to all fragments.
     */
Dispatch onStart() to all fragments.
Dispatch onStart () to all fragments .
@Override
    protected void onStart() {
        super.onStart();
        mStopped = false;
        if (!mCreated) {
            mCreated = true;
            mFragments.dispatchActivityCreated();
        }
        mFragments.noteStateNotSaved();
        mFragments.execPendingActions();
        mFragments.dispatchStart();
    }
@ Override protected void onStart ( ) { super . onStart ( ) ; mStopped = false ; if ( ! mCreated ) { mCreated = true ; mFragments . dispatchActivityCreated ( ) ; } mFragments . noteStateNotSaved ( ) ; mFragments . execPendingActions ( ) ; mFragments . dispatchStart ( ) ; }
Dispatch onStart() to all fragments.
Dispatch onStart () to all fragments .
// NOTE: HC onStart goes here.