使用 Intent 从适配器启动另一个类？

Posted 2023-04-18

【中文标题】使用 Intent 从适配器启动另一个类？

【英文标题】：Start Another Class From adapter Using Intent?

【发布时间】：2019-10-08 18:57:42

【问题描述】：

我想使用 Intent 并想移动到另一个 viewpager 类，我正在使用 Intent 来做这个

    private void gotInvoiceClass(String fname) 
       Intent goToUpdate = new Intent (mContext,Invoices.class);
       goToUpdate.putExtrka("FIRSTNAME", fname);
       mContext.startActivity(goToUpdate);
  

我知道上面的方法是用来从类移动到活动的；为什么在使用从 viewpager 类到另一个 viewpager 类的意图时这种方法是不可能的。 这是我的完整视图寻呼机回收器适配器类

public class ClientRecyclerAdapter extends RecyclerView.Adapter<ClientRecyclerAdapter.ClientViewHolder> 

private List<GetSetClientsDetail> listOrders;
Context mContext;
RecyclerView mRecyclerView;
View itemView;

public ClientRecyclerAdapter(List<GetSetClientsDetail> listOrders, RecyclerView recyclerView) 
    this.listOrders =  listOrders;
    mRecyclerView = recyclerView;


@Override
public ClientViewHolder onCreateViewHolder(ViewGroup parent, int viewType) 
    mContext = parent.getContext();
    itemView = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.items_clients_table, parent, false);

    return new ClientViewHolder(itemView);



public class ClientViewHolder extends RecyclerView.ViewHolder 

    public TextView lblName;
    public TextView lblRoute;
    public TextView lblType;
    public TextView lblCName;
    public TextView lblContact;
    RelativeLayout clientitemslayout;


    public ClientViewHolder(View view) 
        super(view);


        lblName =  view.findViewById(R.id.lblBName);
        lblRoute =  view.findViewById(R.id.lblRoute);
        lblType =  view.findViewById(R.id.lblType);
        lblCName = view.findViewById(R.id.lblCName);
        lblContact =  view.findViewById(R.id.lblContact);
        clientitemslayout = view.findViewById(R.id.listclientsitems);
    


@Override
public void onBindViewHolder(ClientViewHolder holder, final int position) 

    holder.lblName.setText(listOrders.get(position).getFNAME());
    holder.lblRoute.setText(listOrders.get(position).getROUTE());
    holder.lblType.setText(listOrders.get(position).CNIC);
    holder.lblCName.setText(listOrders.get(position).getLNAME());
    holder.lblContact.setText(listOrders.get(position).getCONTACT());
    holder.clientitemslayout.setOnLongClickListener(new View.OnLongClickListener() 
        @Override
        public boolean onLongClick(View v) 
            displayingAlertDialog(position);
            return false;
        
    );



@Override
public int getItemCount() 
    Log.v(ClientRecyclerAdapter.class.getSimpleName(), "" + listOrders.size());
    return listOrders.size();


private void displayingAlertDialog(final int position) 
    final GetSetClientsDetail getSetClientsDetail= new GetSetClientsDetail();
    AlertDialog.Builder builder = new AlertDialog.Builder(itemView.getContext());
    builder.setTitle("Choose Option");
    builder.setMessage("Add Client Invoice?");
    builder.setPositiveButton("Add", new DialogInterface.OnClickListener() 
        @Override
        public void onClick(DialogInterface dialog, int which) 

            gotInvoiceClass(listOrders.get(position).getFNAME());
            dialog.cancel();

        
    );
    builder.setNeutralButton("Remove", new DialogInterface.OnClickListener() 
        @Override
        public void onClick(DialogInterface dialog, int which) 
            //go to Remove Item
            DatabaseHelper dbHelper = new DatabaseHelper(mContext);
           dbHelper.deletePersonRecord(listOrders.get(position).getFNAME(), mContext);
            listOrders.remove( position);
            notifyItemRemoved(position);
            notifyItemRangeChanged(position, listOrders.size());
            notifyDataSetChanged();
            dialog.cancel();

        
    );
    builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() 
        @Override
        public void onClick(DialogInterface dialog, int which) 
            dialog.dismiss();
        
    );
    AlertDialog alert11 = builder.create();
    alert11.show();



private void gotInvoiceClass(String fname) 
    Intent goToUpdate = new Intent (mContext,Invoices.class);
    goToUpdate.putExtra("FIRSTNAME", fname);
    mContext.startActivity(goToUpdate);

当我点击我在适配器类中实现的对话框时，我想要移动到另一个视图寻呼机类。

谢谢

这是我的错误日志

android.content.ActivityNotFoundException: Unable to find explicit activity class com.dspak.erpmini/com.dynamicsolution.pakistan.Invoices; have you declared this activity in your AndroidManifest.xml?
    at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1541)
    at android.app.Instrumentation.execStartActivity(Instrumentation.java:1416)
    at android.app.Activity.startActivityForResult(Activity.java:3351)
    at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:767)
    at android.app.Activity.startActivityForResult(Activity.java:3312)
    at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:754)
    at android.app.Activity.startActivity(Activity.java:3522)
    at android.app.Activity.startActivity(Activity.java:3490)
    at com.dynamicsolution.pakistan.ClientRecyclerAdapter.gotupdateuserActivity(ClientRecyclerAdapter.java:133)
    at com.dynamicsolution.pakistan.ClientRecyclerAdapter.access$200(ClientRecyclerAdapter.java:21)
    at com.dynamicsolution.pakistan.ClientRecyclerAdapter$2.onClick(ClientRecyclerAdapter.java:99)

这是我的客户端类

    public class Clients extends Fragment 
    RecyclerView recyclerViewClients;
    Button btnAll;
    SearchView searchViewclient;
    ClientRecyclerAdapter clientRecyclerAdapter;
    List<GetSetClientsDetail> listclients;
    DatabaseHelper databaseHelper;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
        View view =  inflater.inflate(R.layout.clients, container, false);

        btnAll=view.findViewById(R.id.searchallclients);
        recyclerViewClients=view.findViewById(R.id.recyclerviewallclients);
        searchViewclient=view.findViewById(R.id.searchclient);
        listclients = new ArrayList<>();

        clientRecyclerAdapter = new ClientRecyclerAdapter(listclients,recyclerViewClients);
        recyclerViewClients.setItemAnimator(new DefaultItemAnimator());
        recyclerViewClients.setItemAnimator(new DefaultItemAnimator()); //multi copy paste!
        recyclerViewClients.setLayoutManager(new LinearLayoutManager(getContext()));
        recyclerViewClients.setHasFixedSize(true);
        recyclerViewClients.setAdapter(clientRecyclerAdapter);

        databaseHelper = new DatabaseHelper(getActivity());

        searchViewclient.setOnClickListener(new View.OnClickListener() 
            @Override
            public void onClick(View v) 
                SearchSQliteClientData();
            
        );

        btnAll.setOnClickListener(new View.OnClickListener() 
            @Override
            public void onClick(View v) 
                getClientFromSqlite();
            
        );

        return view;
    

    @SuppressLint("StaticFieldLeak")
    private void SearchSQliteClientData() 
        new AsyncTask<Void, Void, Void>() 
            @Override
            protected Void doInBackground(Void... params) 
                listclients.clear();
                listclients.addAll(databaseHelper.SearchClientsData("A"));
                return null;
            

            @Override
            protected void onPostExecute(Void aVoid) 
                super.onPostExecute(aVoid);
                clientRecyclerAdapter.notifyDataSetChanged();
            
        .execute();
    


    @SuppressLint("StaticFieldLeak")
    private void getClientFromSqlite() 
        new AsyncTask<Void, Void, Void>() 
            @Override
            protected Void doInBackground(Void... params) 
                listclients.clear();
                listclients.addAll(databaseHelper.getAllClientsData());
                return null;
            

            @Override
            protected void onPostExecute(Void aVoid) 
                super.onPostExecute(aVoid);
                clientRecyclerAdapter.notifyDataSetChanged();
            
        .execute();
    

这是包含查看器的我的活动..

 public class MainFragment extends AppCompatActivity 

    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_fragment);

        Toolbar toolbar = findViewById(R.id.toolbar);
        toolbar.setTitle("Dynamic ERPMini");

        TabLayout tabLayout = findViewById(R.id.tab_layout);


        tabLayout.addTab(tabLayout.newTab().setText("Clients"));
        tabLayout.addTab(tabLayout.newTab().setText("Products"));
        tabLayout.addTab(tabLayout.newTab().setText("Invoices"));

        tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);

        final ViewPager viewPager = findViewById(R.id.pager);
        final PagerAdapter adapter = new PagersAdapter(getSupportFragmentManager(), tabLayout.getTabCount());

        viewPager.setAdapter(adapter);
        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
        tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() 

            @Override
            public void onTabSelected(TabLayout.Tab tab) 
                viewPager.setCurrentItem(tab.getPosition());
            

            @Override
            public void onTabUnselected(TabLayout.Tab tab) 

            

            @Override
            public void onTabReselected(TabLayout.Tab tab) 

            
        );
    

【问题讨论】：

让我们continue this discussion in chat。

【参考方案1】：

你不能使用intent打开一个fragment类。

您可以做的是在MainFragment 中创建一个selectTab 函数，并从gotInvoiceClass 函数中调用它。

主片段

public void selectTab(int position, String fname) 
        this.fname = fname;
        viewPager.setCurrentItem(position);
    

    public String getMyData() 
        return fname;
    

修改gotInvoiceClass如下：

private void gotInvoiceClass(String fname) 
        MainFragment main = (MainFragment) mContext;
        main.selectTab(2, fname);
    

在Invoices类中，你可以从MainFragment得到fname。

发票

MainFragment activity = (MainFragment) getActivity();
String name = activity.getMyData();
EdtName.setText(name);

【讨论】：

我的问题由此解决；感谢您的帮助:)