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recyclerViewの中の画像削除ボタンをクリックするとデータベースから項目を削除する必要があります。Recyclerで実装されたボタンクリックでSqliteからデータを削除する方法
これはバスケット活動です BasketMain.java package in.haazir.haazir.basket;
import android.app.ActionBar;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
import java.util.jar.Attributes;
import in.haazir.haazir.R;
import in.haazir.haazir.demo;
import in.haazir.haazir.recycleviewlistner.RecyclerTouchListener;
import in.haazir.haazir.sqllitedatabase.DatabaseOperations;
public class BasketMain extends AppCompatActivity {
private RecyclerView haazirBasket;
DatabaseOperations basketobj;
List<DataofBasket> data=new ArrayList<>();
AdapterBasket mAdapter;
AdapterBasket mAdapter2;
private Toolbar mToolbar;
DataofBasket dob = new DataofBasket();
public int counter=0;
public String name;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_basket_main);
//deletecartitem = (ImageButton)findViewById(R.id.basketdeleteitembtn);
this.setTitle("Basket");
this.getSupportActionBar().setDisplayHomeAsUpEnabled(true); // we use this when we use app compact else if we use actionbar then "this.getActionBar().setDisplayHomeAsUpEnabled(true);"
haazirBasket = (RecyclerView) findViewById(R.id.basketmain);
haazirBasket.setLayoutManager(new LinearLayoutManager(BasketMain.this));
haazirBasket.setItemAnimator(new DefaultItemAnimator());
//haazirService.addItemDecoration(new DividerItemDecoration(this, LinearLayoutManager.VERTICAL));
haazirBasket.addItemDecoration(new in.haazir.haazir.recycleviewlistner.DividerItemDecoration(getApplicationContext()));
basketobj = new DatabaseOperations(this);
data = basketobj.getAllProducts();
mAdapter = new AdapterBasket(BasketMain.this,data);
haazirBasket.setAdapter(mAdapter);
haazirBasket.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(), haazirBasket, new RecyclerTouchListener.ClickListener() {
@Override
public void onClick(View view, int position) {
Toast.makeText(getApplicationContext(), "clicked", Toast.LENGTH_SHORT).show();
// mAdapter.deleteListener(getApplicationContext());
DataofBasket dob = data.get(position);
name = dob.serviceName;
// mAdapter2 = new AdapterBasket(name,getApplicationContext());
/*if (counter > 0) {
float r = basketobj.DeletRecord(name);
Log.e("deletItem: ", "" + r);
data = basketobj.getAllProducts();
mAdapter = new AdapterBasket(BasketMain.this, data);
haazirBasket.setAdapter(mAdapter);
}*/
}
@Override
public void onLongClick(View view, int position) {
}
}));
}
String getName()
{
return name;
}
void updateCounter()
{
counter++;
}
void deletItem(int pos)
{
// mAdapter.deleteListener(getApplicationContext());
data = basketobj.getAllProducts();
DataofBasket dob = data.get(pos);
name = dob.serviceName;
float r =basketobj.DeletRecord(name);
Log.e("deletItem: ",""+r);
data = basketobj.getAllProducts();
mAdapter = new AdapterBasket(BasketMain.this, data);
haazirBasket.setAdapter(mAdapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, 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.
switch (item.getItemId()) {
case android.R.id.home:
// app icon in action bar clicked; goto parent activity.
this.finish();
return true;
case R.id.action_settings:
return true;
case R.id.cart:
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
これは私がrecyclerViewに使用アダプタです。
AdapterBasket.java パッケージin.haazir.haazir.basket;
/**
* Created by Dell on 3/4/2017.
*/
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import com.bumptech.glide.Glide;
import java.util.Collections;
import java.util.List;
import in.haazir.haazir.R;
import in.haazir.haazir.haazirservices.DataofServices;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ToggleButton;
import com.bumptech.glide.Glide;
import java.util.Collections;
import java.util.List;
import in.haazir.haazir.R;
import in.haazir.haazir.haazirservices.DataofServices;
import in.haazir.haazir.sqllitedatabase.DatabaseOperations;
/**
* Created by hp.com on 10-02-2017.
*/
public class AdapterBasket extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
public Context context;
private LayoutInflater inflater;
List<DataofBasket> data= Collections.emptyList();
DataofBasket current;
DataofBasket current1;
int currentPos=0;
public int count = 1;
DatabaseOperations dbobj;
MyHolder holder;
public String name;
// create constructor to innitilize context and data sent from MainActivity
public AdapterBasket(Context context, List<DataofBasket> data){
this.context=context;
inflater= LayoutInflater.from(context);
this.data=data;
}
public AdapterBasket(String name, Context context){
this.name=name;
inflater= LayoutInflater.from(context);
}
// Inflate the layout when viewholder created
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view=inflater.inflate(R.layout.container_basket, parent,false);
holder=new MyHolder(view);
return holder;
}
// Bind data
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
// Get current position of item in recyclerview to bind data and assign values from list
final MyHolder myHolder = (MyHolder) holder;
current = data.get(position);
myHolder.textServiceName.setText(current.serviceName);
// load image into imageview using glide
Glide.with(context).load(current.serviceImage)
.placeholder(R.drawable.grocery)
.error(R.drawable.maggie)
.into(myHolder.serviceImageHaazir);
/*myHolder.deletecartitem.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Log.e("onClick: ","button clicked "+current.serviceName);
DatabaseOperations basketobj = new DatabaseOperations(context);
BasketMain bm = new BasketMain();
float r =basketobj.DeletRecord(current.serviceName);
Log.e("onClick: ",""+r);
//data = basketobj.getAllProducts();
//AdapterBasket ad = new AdapterBasket(context, data);
//ad.setAdapter(mAdapter);
}
});
*/
}
// return total item from List
@Override
public int getItemCount() {
return data.size();
}
public void delete(int position) { //removes the row
current1 = data.get(position);
Log.e("onClick: ","button clicked "+current1.serviceName);
BasketMain bm = new BasketMain();
//bm.deletItem(current1.serviceName);
//bm.updateCounter();
DatabaseOperations dbo = new DatabaseOperations(context);
float r = dbo.DeletRecord(name);
Log.e("deletItem: ", "" + r);
//data = dbo.getAllProducts();
//data.remove(position);
//notifyItemRemoved(position);
}
class MyHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
TextView textServiceName;
ImageView serviceImageHaazir;
ImageButton deletecartitem;
// create constructor to get widget reference
public MyHolder(View itemView) {
super(itemView);
textServiceName = (TextView) itemView.findViewById(R.id.productdisplatnameidbasket);
serviceImageHaazir = (ImageView) itemView.findViewById(R.id.imagebasket);
deletecartitem = (ImageButton) itemView.findViewById(R.id.basketdeleteitmebutton);
deletecartitem.setOnClickListener(this);
}
@Override
public void onClick(View view) {
BasketMain bm = new BasketMain();
bm.deletItem(getAdapterPosition());
delete(getAdapterPosition());
}
}
}
特定のアイテムのカーソルIDを取得し、DBからraw全体を削除します。 –