How to Start Activity in Adapter

How to start Activity in adapter?

Just pass in the current Context to the Adapter constructor and store it as a field. Then inside the onClick you can use that context to call startActivity().

pseudo-code

public class MyAdapter extends Adapter {
     private Context context;

     public MyAdapter(Context context) {
          this.context = context;     
     }

     public View getView(...){
         View v;
         v.setOnClickListener(new OnClickListener() {
             void onClick() {
                 context.startActivity(...);
             }
         });
     }
}

Start Intent in Adapter

you have passed context of activity in constructor so you can also use;

activity.startActivity(new Intent(activity, NVirementEmmeteur.class));

---

check here is sample code you get idea what to do:

setadapter like : adapter = new MyArrayAdapter(MainActivity.this, COUNTRIES);

adapter code:

package com.example.testapp;

import com.example.main.util.testActivity;

import android.content.Context;
import android.content.Intent;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

class MyArrayAdapter extends BaseAdapter {

    private LayoutInflater mInflater;
    private Context mcon;
    private String[] COUNTRIES_;

    public MyArrayAdapter(Context con, String[] countries) {
        // TODO Auto-generated constructor stub
        mcon = con;
        COUNTRIES_ = countries;
        mInflater = LayoutInflater.from(con);
    }

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return COUNTRIES_.length;
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        final ListContent holder;
        View v = convertView;
        if (v == null) {
            v = mInflater.inflate(R.layout.my_spinner_style, null);
            holder = new ListContent();
            holder.line = (LinearLayout) v.findViewById(R.id.line_);
            holder.name = (TextView) v.findViewById(R.id.textView1);
            holder.name1 = (TextView) v.findViewById(R.id.textView2);
            holder.name2 = (ImageView) v.findViewById(R.id.imageView1);

            v.setTag(holder);
        } else {

            holder = (ListContent) v.getTag();
        }

        holder.name.setText("" + Html.fromHtml("" + COUNTRIES_[position]));
        holder.name1.setText("" + Html.fromHtml("" + COUNTRIES_[position]));

        holder.line.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                mcon.startActivity(new Intent(mcon, testActivity.class));
            }
        });

        return v;
    }

}

class ListContent {

    TextView name;
    TextView name1;
    ImageView name2;
    LinearLayout line;

}

---

Edited:

if your are use this constructor: then list.setadapter(new EfficientAdapter(myactivity.this));

public EfficientAdapter(Context context) {
          this.context = context;     
     }

then use : context.startActivity(new Intent(context, NVirementEmmeteur.class));

---

if you use this construdtor list.setadapter(new EfficientAdapter(myactivity.this, ComptePostarray));

public EfficientAdapter(Activity a, ArrayList<ComptePost> d) {

        activity = a;
        data = d;
        inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    //  imageLoader = new ImageLoader(activity.getApplicationContext());
        imageLoader=new ImageLoader(activity.getApplicationContext());
    }

then use activity.startActivity(new Intent(activity, NVirementEmmeteur.class));

Hope you understud....

Starting an Activity from an Adapter

change this

activity.startActivity( new Intent(activity,BasketActivity.class));

to

 context .startActivity( new Intent(context,BasketActivity.class));

OR Create asynck task in adapter.

How to start Activity in my adapter?

You could try:

post.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        v.getContext().startActivity(new Intent(v.getContext(),asabani_cat.class));
    }
});

Start Activity in Adapter

Probably context is null :

Use single constructor to pass String Array and Context :

public CardViewDataAdapter_smiley(String[] myDataset,Context context) {
            this.mDataset = myDataset;
             this.context = context;
  }

OR

with-out passing Context in constructor use v.getContext() to start Activity on Click:

    @Override
    public void onClick(View v) {
        Intent intent = new Intent(v.getContext(),SMS_Smiley.class);
        v.getContext().startActivity(intent);
    }

How to open a new activity from the adapter?

Don't dispose passed context to your adapter

public class DataAdapter extends RecyclerView.Adapter<DataAdapter.ViewHolder> {

private LayoutInflater inflater;
private List<Phone> phones;
private Context context;

public DataAdapter(Context context, List<Phone> phones) {
    this.context = context;
    this.phones = phones;
    this.inflater = LayoutInflater.from(context);
}
// Remainder code
}

Then use context to start new activity

@Override
public void onBindViewHolder(DataAdapter.ViewHolder holder, int position) {
    final Phone phone = phones.get(position);
    holder.imageView.setImageResource(phone.getImage());
    holder.nameView.setText(phone.getName());
    holder.companyView.setText(phone.getCompany());
    holder.button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Log.e("click: ", phone.getClickbutton());
            context.startActivity(new Intent(this, Information.class));
        }
    });
}

How to pass intent from Adapter class to other activity but my variable is in other activity

You can have couple of options to solve this:

Option 1:

If you want to start "ProfilWarehouseActivity" activity from the adapter, then you need to pass the "EmailHolder" from "WarehouseActivity" to your adapter by either its constructor, or a setter:

Passing String into Adapter Constructor

final WarehouseAdapter mAdapter = new WarehouseAdapter( WarehouseActivity.this, list, EmailHolder);

Passing String using a Setter

In "ProfilWarehouseActivity" activity:

mAdapter.setEmailHolder(EmailHolder);

In WarehouseAdapter adapter:

private String mEmailHolder;
public void setEmailHolder(String emailHolder) {
    this.mEmailHolder = emailHolder;
}

....

private void passid(String idItem) {

    Intent intent = new Intent(context, ProfilWarehouseActivity.class);
    intent.putExtra(Konfigurasi_Warehouse.WAREHOUSE_ID, idItem);
    intent.putExtra("EmailHolder", mEmailHolder);

    //i think this is for get my EmailHolder from WarehouseActivity to pass it with Intent from this Adapter class

    context.startActivity(intent);

}

Option 2:

The other option is to create a listener and implement it in "ProfilWarehouseActivity", And pass the itemId as a parameter to the listener callback. Then let your "ProfilWarehouseActivity" call the "WarehouseActivity" instead of the WarehouseAdapter whenever this listener is triggered.

In WarehouseAdapter adapter:

public interface ItemClickListener {
    public void onItemClick(int idItem);
}

ItemClickListener mItemClickListener;

public void setItemClickListener(ItemClickListener listener) {
    mItemClickListener = listener;
}

private void passid(String idItem) {
    if (mItemClickListener != null)
        mItemClickListener.onItemClick(idItem);
}

In "ProfilWarehouseActivity" activity:

class ProfilWarehouseActivity extends AppCompatActivity implements WarehouseAdapter.ItemClickListener { 
    private String EmailHolder;

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

        Bundle extras = getIntent().getExtras();
        EmailHolder = extras.getString("emailuser");

    }

    @Override
    onItemClick(int itemId) {
        Intent intent = new Intent(this, ProfilWarehouseActivity.class);
        intent.putExtra(Konfigurasi_Warehouse.WAREHOUSE_ID, idItem);
        intent.putExtra("EmailHolder", EmailHolder);
        startActivity(intent);        
    }   
    ... 

    final WarehouseAdapter mAdapter = new WarehouseAdapter( WarehouseActivity.this,list);
    mAdapter.setItemClickListener(this);

How to start activity from RecyclerView adapter in fragment

Pass contaxt to recyclerview adapter constructor like this

Context context;
MyAdapter(Context context, .....){
this.context=context;
}

Call Activity

context.startActivity(......);

how to open activity from adapter in kotlin

Just replace the error line with

 context.startActivity(intent)

---

Related Topics