android.app.FragmentTransaction#attach ( )源码实例Demo

private FragmentTransaction doTabChanged(String tabId, FragmentTransaction ft) {
    TabInfo newTab = null;
    for (int i=0; i<mTabs.size(); i++) {
        TabInfo tab = mTabs.get(i);
        if (tab.tag.equals(tabId)) {
            newTab = tab;
        }
    }
    if (newTab == null) {
        throw new IllegalStateException("No tab known for tag " + tabId);
    }
    if (mLastTab != newTab) {
        if (ft == null) {
            ft = mFragmentManager.beginTransaction();
        }
        if (mLastTab != null) {
            if (mLastTab.fragment != null) {
                ft.detach(mLastTab.fragment);
            }
        }
        if (newTab != null) {
            if (newTab.fragment == null) {
                newTab.fragment = Fragment.instantiate(mContext,
                        newTab.clss.getName(), newTab.args);
                ft.add(mContainerId, newTab.fragment, newTab.tag);
            } else {
                ft.attach(newTab.fragment);
            }
        }

        mLastTab = newTab;
    }
    return ft;
}
 

public void onTabSelected(Tab tab, FragmentTransaction ft) {
	// Check if the fragment is already initialized
	if (mFragment == null) {
		// If not, instantiate and add it to the activity
		mFragment = Fragment.instantiate(mActivity, mClass.getName());
		ft.add(android.R.id.content, mFragment, mTag);
	} else {
		// If it exists, simply attach it in order to show it
		ft.attach(mFragment);
	}
}
 

public void onTabSelected(Tab tab, FragmentTransaction ft) {
    if (mFragment == null) {
        mFragment = Fragment.instantiate(mActivity, mClass.getName(), mArgs);
        ft.add(android.R.id.content, mFragment, mTag);
    } else {
        ft.attach(mFragment);
    }
}
 

public void onTabSelected(Tab tab, FragmentTransaction ft) {
	// Check if the fragment is already initialized
	if (mFragment == null) {
		// If not, instantiate and add it to the activity
		mFragment = Fragment.instantiate(mActivity, mClass.getName());
		ft.add(android.R.id.content, mFragment, mTag);
	} else {
		// If it exists, simply attach it in order to show it
		ft.setCustomAnimations(android.R.animator.fade_in,
				R.animator.animationtest);
		ft.attach(mFragment);
	}
}
 

@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
public void attach(Fragment fragment,
                   FragmentTransaction currTransaction) {
    currTransaction.attach(fragment);
}
 

private FragmentTransaction a(String s, FragmentTransaction fragmenttransaction)
{
    j j1 = null;
    int i = 0;
    while (i < a.size()) 
    {
        j j2 = (j)a.get(i);
        if (!j.b(j2).equals(s))
        {
            j2 = j1;
        }
        i++;
        j1 = j2;
    }
    if (j1 == null)
    {
        throw new IllegalStateException((new StringBuilder()).append("No tab known for tag ").append(s).toString());
    }
    if (g != j1)
    {
        if (fragmenttransaction == null)
        {
            fragmenttransaction = d.beginTransaction();
        }
        if (g != null && j.a(g) != null)
        {
            fragmenttransaction.detach(j.a(g));
        }
        if (j1 != null)
        {
            if (j.a(j1) == null)
            {
                j.a(j1, Fragment.instantiate(c, j.c(j1).getName(), j.d(j1)));
                fragmenttransaction.add(e, j.a(j1), j.b(j1));
            } else
            {
                fragmenttransaction.attach(j.a(j1));
            }
        }
        g = j1;
    }
    return fragmenttransaction;
}
 

@TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
public void attach(Fragment fragment,
                   FragmentTransaction currTransaction) {
  currTransaction.attach(fragment);
}