CODEWITHSUNDEEP
androidandroid-fragments
Micro
Micro

Reputation: 10891

How to launch activity and show specific fragment

I have a MainActivity that has several fragments which are added and then shown/hidden. This is because the MainActivity uses a NavigationDrawer. Clicking on items in the drawer causes different fragments to be added (if they do not exist), or shown/hidden if they do.

My question is, how can I launch my MainActivity via an intent from a different activity, and at the same time show a specific fragment?

Would I have to pass some extra to my MainActivity and then based on that data, add/show/hide the relevant fragment? Is there another way?

Upvotes: 6

Views: 16176

Answers (4)

Jtoby
Jtoby

Reputation: 71

In Kotlin,

val i = Intent(context, MyActivity::class.java)
i.putExtra("fragmentToLoad", "fragment2")
startActivity(i)

Inside your activity check the extra and load the intended Fragment:

val intentFragment = intent?.extras?.getString("fragmentToLoad")
when (intentFragment) {
    "fragment2" -> {
        val fragment = Fragment2()

        supportFragmentManager.beginTransaction()
            .replace(R.id.main_content, fragment)
            .commit()
    }
}

android navigation-migrate

Upvotes: 1

Bad Toro
Bad Toro

Reputation: 211

When you create your Intent, you can give it an extra that determines the fragment to load.

Intent i = new Intent(this, ActivityClass.class);
i.putExtra("frgToLoad", FRAGMENT_A);

// Now start your activity
startActivity(i);

Now, inside your activity check the extra and load the right Fragment:

OnCreate(){
    ...

    int intentFragment = getIntent().getExtras().getInt("frgToLoad");

    switch (intentFragment){
        case FRAGMENT_A:
            // Load corresponding fragment
            break;
        case FRAGMENT_B:
            // Load corresponding fragment
            break;
        case FRAGMENT_C:
            // Load corresponding fragment
            break;
    }
}

Upvotes: 21

Sen
Sen

Reputation: 154

You can use sharedPreference to achieve the goals. Save the index after you open you TAB/Fragment.

        //get current tab
        sharedPreferences = getSharedPreferences("MyPrefs", MODE_PRIVATE);
        String position = sharedPreferences.getString("tab_opened", null);
        if(position==null){
            viewPager.setCurrentItem(1,true);
        }else if(position=="0"){
            viewPager.setCurrentItem(0,true);
        }else if(position=="1"){
            viewPager.setCurrentItem(1,true);
        }else if(position=="2"){
            viewPager.setCurrentItem(2,true);
        }

}// <<<~~~ THAT IS END OF onCreate() method.

Please refer to this tutorial : OPEN THIS .

Upvotes: 1

pavanjoshi
pavanjoshi

Reputation: 240

In case you are looking for something like this, hope so! 

@Override
public void onNavigationDrawerItemSelected(int position) {    
    Fragment fragment;
    FragmentManager fManager = getFragmentManager();
    Bundle args = new Bundle();
    args.putInt(MCConstants.ARG_SECTION_NUMBER, position);
    clearAllBackStack();
    FragmentTransaction fTransaction = fManager.beginTransaction();

    switch (position) {
    case 0:
        fragment = new FirstFragment();
        fragment.setArguments(args);
        fTransaction.replace(R.id.container, fragment,
                "FTAG").commit();
        break;
    case 1:
        fragment = new SecFragment();
        fragment.setArguments(args);
        fTransaction.replace(R.id.container, fragment,
                "STAG").commit();
        break;
    case 2:
        fragment = new ThirdFragment();
        fragment.setArguments(args);
        fTransaction.replace(R.id.container, fragment,
                "TTAG").commit();
        break;
    }
}

Upvotes: 0

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