我想将product_name，product_price和数量的值从firebase适配器传递给Product_viewer Activity。 我如何才能找到回收者的哪一部分查看用户点击。
我的主要活动是User_home_page。
Dataprovider.java
package com.example.alok.shoppers1.User_data.RecyclerView;
public class Dataprovider {
private String category;
private String email_id;
private String product_id;
private String product_name;
private String product_price;
private String quantity;
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public String getProduct_name() {
return product_name;
}
public void setProduct_name(String product_name) {
this.product_name = product_name;
}
public String getEmail_id() {
return email_id;
}
public void setEmail_id(String email_id) {
this.email_id = email_id;
}
public String getProduct_id() {
return product_id;
}
public void setProduct_id(String product_id) {
this.product_id = product_id;
}
public String getProduct_price() {
return product_price;
}
public void setProduct_price(String product_price) {
this.product_price = product_price;
}
public String getQuantity() {
return quantity;
}
public void setQuantity(String quantity) {
this.quantity = quantity;
}
public Dataprovider(String category, String product_name, String email_id, String product_id, String product_price, String quantity) {
this.category = category;
this.product_name = product_name;
this.email_id = email_id;
this.product_id = product_id;
this.product_price = product_price;
this.quantity = quantity;
}
public Dataprovider() {
}
}
这是我的User_home_page User_home_page
package com.example.alok.shoppers1.User_data;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.TextView;
import com.example.alok.shoppers1.R;
import com.example.alok.shoppers1.User_data.RecyclerView.Dataprovider;
import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import java.util.ArrayList;
public class User_home_page extends AppCompatActivity
implements NavigationView.OnNavigationItemSelectedListener {
private RecyclerView mDataprovider;
private DatabaseReference mDatabase;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_user_home_page);
mDatabase = FirebaseDatabase.getInstance().getReference().child("product");
mDatabase.keepSynced(true);
mDataprovider = findViewById(R.id.recycler_view);
mDataprovider.setHasFixedSize(true);
mDataprovider.setLayoutManager(new LinearLayoutManager(this));
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
}
@Override
protected void onStart() {
super.onStart();
FirebaseRecyclerAdapter<Dataprovider,DataproviderViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Dataprovider, DataproviderViewHolder>(Dataprovider.class,R.layout.user_item_layout,DataproviderViewHolder.class,mDatabase) {
@Override
protected void populateViewHolder(DataproviderViewHolder viewHolder, Dataprovider model, int position) {
viewHolder.setProduct_price(model.getProduct_price());
viewHolder.setQuantity(model.getQuantity());
viewHolder.setProduct_name(model.getProduct_name());
}
};
mDataprovider.setAdapter(firebaseRecyclerAdapter);
}
public static class DataproviderViewHolder extends RecyclerView.ViewHolder{
View mview;
public DataproviderViewHolder(View itemView){
super(itemView);
mview = itemView;
}
public void setProduct_price(String price){
TextView prod_price = mview.findViewById(R.id.price_product_user);
prod_price.setText(price);
}
public void setQuantity(String quantity){
TextView quant = mview.findViewById(R.id.product_quantity_user);
quant.setText(quantity);
}
public void setProduct_name(String name){
TextView nam = mview.findViewById(R.id.product_name_user);
nam.setText(name);
}
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.user_home_page, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.electronics) {
// Handle the camera action
} else if (id == R.id.user_profile) {
Intent user_profile = new Intent(getBaseContext(),User_profile.class);
startActivity(user_profile);
} else if (id == R.id.lifestyle) {
} else if (id == R.id.home_appliances) {
} else if (id == R.id.books_and_more) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
我想将数据从user_home_page传递给data_viewer Intent
答案 0 :(得分：0)
以及我已经看到你的代码最好将你的适配器放在一个单独的类中，但是在你的适配器实现中你应该调用on click函数。
protected void onStart() {
super.onStart();
FirebaseRecyclerAdapter<Dataprovider,DataproviderViewHolder> firebaseRecyclerAdapter = new FirebaseRecyclerAdapter<Dataprovider, DataproviderViewHolder>(Dataprovider.class,R.layout.user_item_layout,DataproviderViewHolder.class,mDatabase) {
@Override
protected void populateViewHolder(DataproviderViewHolder viewHolder, Dataprovider model, int position) {
viewHolder.setProduct_price(model.getProduct_price());
viewHolder.setQuantity(model.getQuantity());
viewHolder.setProduct_name(model.getProduct_name());
//set your click listener here
viewholder.setOnClickListener(new View.onClickListener(){...
//to pass data you could either put them seperatly in new intent
Intent i = new Intent(CurrentActivity, NextActivity.class);
i.putExtra("quantity", model.getQuantity());
// all data needed then
startActivity(i);
//or you could make your object model extend Serializable and send the object as it is to the next activity as
i.putExtra("model", model);
});
}
};
mDataprovider.setAdapter(firebaseRecyclerAdapter);
}
public static class DataproviderViewHolder extends
RecyclerView.ViewHolder{
View mview;
public DataproviderViewHolder(View itemView){
super(itemView);
mview = itemView;
}
public void setProduct_price(String price){
TextView prod_price = mview.findViewById(R.id.price_product_user);
prod_price.setText(price);
}
public void setQuantity(String quantity){
TextView quant = mview.findViewById(R.id.product_quantity_user);
quant.setText(quantity);
}
public void setProduct_name(String name){
TextView nam = mview.findViewById(R.id.product_name_user);
nam.setText(name);
}
}
在您的下一个活动中，您可以按如下方式获取数据
//First method
String qty = getIntent().getStringExtra("quantity");
或者如果您选择发送可序列化对象
//Second method
Model model = getIntent().getSerializableExtra("model");
希望这会有所帮助