替换FrameLayout布局中的片段

Question

I have tried every tutorial on the first google page about android fragments, but I can't get anything to work.

So I have one navigation bar activity, MainActivity . Now I'd like to change fragments on a click in the drawer.

In my content_main (default fragment in the MainActivity activity), I have a framelayout that I wish to put the fragments in. I have the following fragments: fragment_main , fragment_one and fragment_two . And I wish to show these when I click on a button in the nav drawer.

The reason I want to use fragments is so that the nav drawer will stay on top.

Thanks in advance!

Edit: Here is the function I'll use to change fragments:
It's just to test, not finished.

public void setFragment() {
    android.support.v4.app.FragmentTransaction transaction;
    transaction = getSupportFragmentManager().beginTransaction();
    transaction.replace(R.id.fragment_container, new LoginFragment());
    transaction.commit();
}

Answer 1

I solved it!

Apparently, I had to use android.support.v4.app.Fragment; instead of android.app.Fragment; . This is the code I got it to work with:

protected void setFragment(Fragment fragment) {
    android.support.v4.app.FragmentTransaction t = getSupportFragmentManager().beginTransaction();
    t.replace(R.id.fragment_container, fragment);
    t.commit();
}

And to set it (from the nav bar onNavigationItemSelected() , you do this:

setFragment(new RoosterFragment());

I hope this helps others out with the same frustrating problem.

Answer 2

Did you try this? Click here

This link will Help you, to create fragment . and this is what you want for navigation drawer Click here

Answer 3

Accroding to your question,

This is FrameLayout

<FrameLayout
        android:id="@+id/main_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@+id/view"
        android:layout_marginTop="@dimen/medium_margin"></FrameLayout>

---

Now , call displayview method onCreate() of your activity,

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    //rest of your code here
    displayView(0); // fragment at 0 position
}

---

displayView method , which have three fragements

public void displayView(int position) {
        switch (position) {
            case 0:
                tvTitle.setText(getResources().getString(R.string.signin_tile));
                showFragment(new LoginFragment(), position);
                break;
            case 1:
                tvTitle.setText(getResources().getString(R.string.forgot_password_tile));
                showFragment(new ForgotPasswordFragment(), position);
                break;
            case 2:
                tvTitle.setText(getResources().getString(R.string.change_password_tile));
                showFragment(new ChangePasswordFragment(), position);
                break;

        }
    }

---

showFragment method called from displayView method,

public void showFragment(Fragment fragment, int position) {
        FragmentTransaction mTransactiont = getSupportFragmentManager().beginTransaction();

        mTransactiont.replace(R.id.main_container, fragment, fragment.getClass().getName());
        mTransactiont.commit();
    }

Answer 4

Try this one. it is my newbie code easier to understand :)

FragmentTransaction transaction;

switch (id){
            case R.id.button_fragment_one:
                    transaction = getSupportFragmentManager().beginTransaction();
                    transaction.replace(R.id.frame_layout, new FragmentOne());
                    transaction.addToBackStack(null);
                    transaction.commit();
                break;
            case R.id.button_fragment_two:
                    transaction = getSupportFragmentManager().beginTransaction();
                    transaction.replace(R.id.frame_layout, new FragmentTwo());
                    transaction.commit();
                break;
            default:
                break;
}