我想向我的应用添加新部分，但是当我运行该应用时，新部分没有运行？ 如您所见，我有六个部分，我添加了一个新部分，但自然会与我一起出现在列表中，按一下它不会给我带来任何好处。我是否需要在适配器中添加一些东西，以便它起作用并带我到本节
据我所知，我有一个“活动”开关（位置），我试图添加一个新的案件，但没有用。 !! 如果要添加页面代码 ListOfBookActivity
MainActivity
public class MainActivity extends AppCompatActivity {
List<Book>list;
RecyclerView recyclerView;
BookAdapter adapter;
private TextView title_text;
private MyDrawerLayout mDrawerLayout;
private NavigationView mNavigationView;
private View navHeader;
Toolbar toolbar;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
title_text = findViewById(R.id.title);
toolbar = findViewById(R.id.toolbar);
toolbar.setTitleTextColor(getResources().getColor(R.color.white));
// toolbar.setTitle(getString(R.string.conatact_us));
setSupportActionBar(toolbar);
getSupportActionBar().setTitle("");
// getSupportActionBar().setDisplayHomeAsUpEnabled(true);
title_text.setText("head");
recyclerView=findViewById(R.id.recyclerView);
setBookRecycler();
list.add(new Book("s1"));
list.add(new Book("s2"));
list.add(new Book("s3"));
list.add(new Book("s4"));
list.add(new Book("s5"));
list.add(new Book("s6"));
list.add(new Book("news"));
adapter=new BookAdapter(list,MainActivity.this,true);
recyclerView.setAdapter(adapter);
mDrawerLayout = (MyDrawerLayout) findViewById(R.id.drawer_layout);
mNavigationView = (NavigationView) findViewById(R.id.nav_view);
navHeader = mNavigationView.getHeaderView(0);
// Navigation view header
// imgNavHeaderBg = (ImageView) navHeader.findViewById(R.id.img_header_bg);
navHeader.findViewById(R.id.position0).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this,WordActivity.class));
}
});
navHeader.findViewById(R.id.position1).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this,WordActivity.class));
}
});
navHeader.findViewById(R.id.position2).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this,WordActivity.class));
}
});
navHeader.findViewById(R.id.position3).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(MainActivity.this,WordActivity.class));
}
});
setUpNavigationView();
}
private void setUpNavigationView() {
//Setting Navigation View Item Selected Listener to handle the item click of the navigation menu
mNavigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
// This method will trigger on item Click of navigation menu
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
//Check to see which item was being clicked and perform appropriate action
switch (menuItem.getItemId()) {
//Replacing the main content with ContentFragment Which is our Inbox View;
// case R.id.nav_1:
// Toast.makeText(TimelineActivity.this, "test 1", Toast.LENGTH_SHORT).show();
// break;
// case R.id.nav_2:
// Toast.makeText(TimelineActivity.this, "test 2", Toast.LENGTH_SHORT).show();
//
// break;
// case R.id.nav_3:
// Toast.makeText(TimelineActivity.this, "test 3", Toast.LENGTH_SHORT).show();
//
// break;
// case R.id.nav_4:
// Toast.makeText(TimelineActivity.this, "test 4", Toast.LENGTH_SHORT).show();
//
// break;
// case R.id.nav_5:
// Toast.makeText(TimelineActivity.this, "test 5", Toast.LENGTH_SHORT).show();
//
// break;
// default:
// navItemIndex = 0;
}
//Checking if the item is in checked state or not, if not make it in checked state
if (menuItem.isChecked()) {
menuItem.setChecked(false);
} else {
menuItem.setChecked(true);
}
menuItem.setChecked(true);
return true;
}
});
ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,toolbar, R.string.open, R.string.close) {
@Override
public void onDrawerClosed(View drawerView) {
// Code here will be triggered once the drawer closes as we dont want anything to happen so we leave this blank
super.onDrawerClosed(drawerView);
}
@Override
public void onDrawerOpened(View drawerView) {
// Code here will be triggered once the drawer open as we dont want anything to happen so we leave this blank
super.onDrawerOpened(drawerView);
}
};
//Setting the actionbarToggle to drawer layout
mDrawerLayout.setDrawerListener(actionBarDrawerToggle);
//calling sync state is necessary or else your hamburger icon wont show up
actionBarDrawerToggle.syncState();
}
private void setBookRecycler() {
list = new ArrayList<>();
adapter = new BookAdapter(list, this,true);
recyclerView.setHasFixedSize(true);
GridLayoutManager gridLayoutManager = new GridLayoutManager(getApplicationContext(), 1);
gridLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
recyclerView.setLayoutManager(gridLayoutManager);
recyclerView.setAdapter(adapter);
}
}
BookAdapter
public class BookAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private List<Book> moviesList;
private Activity context;
private Boolean bool;
public BookAdapter(List<Book> moviesList, Activity context,Boolean bool) {
this.moviesList = moviesList;
this.context = context;
this.bool=bool;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(context).inflate(R.layout.row_category, parent, false);
return new MovieRow(view);
}
@Override
public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
final Book temp = moviesList.get(position);
MovieRow vh = (MovieRow) holder;
vh.mName.setText(temp.getName());
switch (position){
case 0:
vh.card.setBackgroundColor(context.getResources().getColor(R.color.c1));
break;
case 1:
vh.card.setBackgroundColor(context.getResources().getColor(R.color.c2));
break;
case 2:
vh.card.setBackgroundColor(context.getResources().getColor(R.color.c3));
break;
case 3:
vh.card.setBackgroundColor(context.getResources().getColor(R.color.c4));
break;
case 4:
vh.card.setBackgroundColor(context.getResources().getColor(R.color.c5));
break;
case 5:
vh.card.setBackgroundColor(context.getResources().getColor(R.color.c6));
break;
case 6:
vh.card.setBackgroundColor(context.getResources().getColor(R.color.c1));
break;
case 7:
vh.card.setBackgroundColor(context.getResources().getColor(R.color.c2));
break;
case 8:
vh.card.setBackgroundColor(context.getResources().getColor(R.color.c3));
break;
case 9:
vh.card.setBackgroundColor(context.getResources().getColor(R.color.c4));
break;
case 10:
vh.card.setBackgroundColor(context.getResources().getColor(R.color.c5));
break;
case 11:
vh.card.setBackgroundColor(context.getResources().getColor(R.color.c6));
break;
}
vh.cardView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (bool&&position<4){
Intent intent=new Intent(context, SelectTypeActivity.class);
intent.putExtra("position",position+1+"");
intent.putExtra("name",moviesList.get(position).getName());
context.startActivity(intent);
} else if (!bool){
Intent intent=new Intent(context, PDFViewActivity.class);
intent.putExtra("position",position+1+"");
intent.putExtra("path",moviesList.get(position).getPath());
context.startActivity(intent);
}else if (position==4||position==5){
Intent intent=new Intent(context, ListOfBookActivity.class);
intent.putExtra("position",position+1+"");
intent.putExtra("path",moviesList.get(position).getPath());
context.startActivity(intent);
}
}
});
}
@Override
public int getItemCount() {
return moviesList == null ? 0 : moviesList.size();
}
public class MovieRow extends RecyclerView.ViewHolder {
private TextView mName;
public ConstraintLayout card;
public CardView cardView;
public MovieRow(View itemView) {
super(itemView);
mName = itemView.findViewById(R.id.nameCategory);
card = itemView.findViewById(R.id.card);
cardView = itemView.findViewById(R.id.cardView);
}
}
}