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1// Add a viewer fragment to the layout container in the specified 
2// activity, and returns the added fragment
3public PdfViewCtrlTabHostFragment2 addViewerFragment(@IdRes int fragmentContainer, 
4        @NonNull AppCompatActivity activity, @NonNull Uri fileUri, @Nullable String password) {
5    
6    // Create the viewer fragment
7    PdfViewCtrlTabHostFragment2 fragment =
8            ViewerBuilder2.withUri(fileUri, password).build(activity);
9
10    // Add the fragment to the layout fragment container
11    activity.getSupportFragmentManager().beginTransaction()
12            .replace(fragmentContainer, fragment)
13            .commit();
14
15    return fragment;
16}

1// Add a viewer fragment to the layout container in the specified
2// activity, and returns the added fragment
3public MyCustomTabHostFragment addViewerFragment(@IdRes int fragmentContainer,
4        @NonNull AppCompatActivity activity, @NonNull Uri fileUri, @Nullable String password) {
5
6    // Create the viewer fragment with a custom 
7    // PdfViewCtrlTabFragment2 and PdfViewCtrlTabHostFragment2
8    PdfViewCtrlTabHostFragment2 fragment =
9            ViewerBuilder2.withUri(fileUri, password)
10                    .usingTabClass(MyCustomTabFragment.class)
11                    .build(activity, MyCustomTabHostFragment.class);
12
13    // Add the fragment to the layout fragment container
14    activity.getSupportFragmentManager().beginTransaction()
15            .replace(fragmentContainer, fragment)
16            .commit();
17
18    return fragment;
19}

1// Pass a custom ViewerConfig object to initialize your viewer fragment 
2public PdfViewCtrlTabHostFragment2 createUsingViewerConfig(@NonNull Context context,
3        @NonNull Uri fileUri, @Nullable String password) {
4
5    // Create a ViewerConfig object with custom settings
6    ViewerConfig config = new ViewerConfig.Builder()
7            .fullscreenModeEnabled(true)
8            .multiTabEnabled(true)
9            .documentEditingEnabled(true)
10            .longPressQuickMenuEnabled(true)
11            .toolbarTitle("Host Fragment")
12            .showSearchView(true)
13            .build();
14
15    // Pass in the ViewerConfig object into the ViewerBuilder2
16    return ViewerBuilder2.withUri(fileUri, password)
17            .usingConfig(config)
18            .build(context);
19}

1public PdfViewCtrlTabHostFragment2 createUsingCustomToolbar(@NonNull Context context,
2        @NonNull Uri fileUri, @DrawableRes int navIcon, @MenuRes int[] menuRes) {
3    return ViewerBuilder2.withUri(fileUri)
4            .usingCustomToolbar(menuRes)// Specify a custom toolbar
5            .usingNavIcon(navIcon)      // Specify a custom navigation component
6            .build(context);
7}

1public class CustomToolbarActivity extends AppCompatActivity implements PdfViewCtrlTabHostFragment2.TabHostListener {
2
3@Nullable
4private PdfViewCtrlTabHostFragment2 mPdfViewCtrlTabHostFragment;
5
6// Method used to initialize the viewer fragment with a custom toolbar.
7public void createCustomToolbarFragment(@NonNull Uri fileUri) {
8    mPdfViewCtrlTabHostFragment = ViewerBuilder2.withUri(fileUri)
9            // Specify a custom toolbar
10            .usingCustomToolbar(new int[] {R.menu.my_custom_toolbar})
11            // Specify a custom navigation component
12            .usingNavIcon(R.drawable.ic_arrow_back_white_24dp)      
13            .build(this);
14}
15
16@Override
17public boolean onToolbarOptionsItemSelected(MenuItem item) {
18    if (item.getItemId() == R.id.action_show_toast) {
19        Toast.makeText(this, "Show toast is clicked!", Toast.LENGTH_SHORT).show();
20    }
21    return false;
22}
23
24@Override
25public void onNavButtonPressed() {
26    // called when navigation button has been clicked
27}
28
29@Override
30protected void onDestroy() {
31    super.onDestroy();
32    if (mPdfViewCtrlTabHostFragment != null) {
33        mPdfViewCtrlTabHostFragment.removeHostListener(this);
34    }
35}
36
37// ...