Xtykutl

I am new to developing Android Google Map , I use the two SupportMapFragment in different Fragment-1 and Fragment-2 respectively.

First , I add the two fragment to BackStack. Before showing the any fragment , I will hide the all fragment first.

I want these two fragment were live at the same times , so I did not use replace or remove any fragment. Forex-sample , when the fragment2 is hiding , but it still do something at the background.

I open the Fragment-1 at first and turn to the Fragment-2 , and then back to the Fragment-1. The Fragment-1 show the overlap like the following picture.

I have try to hide the one of the Fragment-2, but it is not working.

IN MainActivity , I manager my fragment.

In onCreate() , I will call following function:

public void initStartFragment(){



        fragment1= new Fragment1();

        getSupportFragmentManager().beginTransaction()

                .add(R.id.fragment_layout, fragment1)

                .addToBackStack(Fragment1.getClass().getName()).commit();



        fragment2= new Fragment2();

        getSupportFragmentManager().beginTransaction()

                .add(R.id.fragment_layout, fragment2)

                .addToBackStack(Fragment2.getClass().getName()).commit();

}





@Override

public void onClick(View v) {



    FragmentTransaction mFragmentTransaction = mManager.beginTransaction();

    hideFragment(mFragmentTransaction);



    if(v.getId() == R.id.dive_learning_btn){



        if (fragment1 == null) {

            fragment1= new Fragment1();

            getSupportFragmentManager().beginTransaction()

                    .add(R.id.fragment_layout, fragment1)

                    .commit();

        }

        mFragmentTransaction.show(fragment1)

                .commit();



    }else if(v.getId() == R.id.expect_setting_btn){



        if (fragment2== null) {

            fragment2= new Fragment2();

            getSupportFragmentManager().beginTransaction()

                    .add(R.id.fragment_layout, fragment2)

                    .commit();

        }

        mFragmentTransaction.show(fragment2)

                .commit();



    }

}

Before show the fragment, I will hide all fragment first:

public void hideFragment(FragmentTransaction ft) {

        //if fragment noy null , hide it.

        if (fragment1 != null) {

            ft.hide(fragment1 );

        }

        if (fragment2 != null) {

            ft.hide(fragment12);

        }

    }

I want these two fragment were live at the same times , so I did not use replace or remove any fragment.

Why this condition happened ? Did I missing something ?

Can someone help me ?

Thanks in advance.