如何为每个recyclerview项的按钮添加功能? [英] How to add functionality to buttons of each of the recyclerview items?
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问题描述
我正在编写一个android代码，其中在单击recyclerview上的按钮时，它将把它定向到其他活动.该程序应将控件重定向到每个recyclerview项的不同活动.我已经成功将按钮添加到了活动模板中，但是，我无法理解如何为每个按钮添加功能.随函附上项目中包含的其他文件.如果有人可以指导我如何从这里继续进行，那将非常有帮助.
I am writing an android code, wherein on clicking a button on the recyclerview, it should direct it to some other activity. The program should redirect the control to different activities for each of the recyclerview items. I have successfully added buttons to the template of the activity, however, I am not able to understand how to add functionality to each of the buttons. I am enclosing herewith the the different files that I have included in the project. It would be very helpful if someone could guide me how to proceed from here.
ProductPage1.java
ProductPage1.java
package com.agnik.example.myapplication4;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.os.Bundle;
import java.util.ArrayList;
public class ProductPage1 extends AppCompatActivity {
private RecyclerView mRecyclerView;
private RecyclerView.Adapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_product_page1);
ArrayList<ExampleItem> exampleList = new ArrayList<>();
exampleList.add(new ExampleItem(R.drawable.mickeymouse, "Line1" , "Line2"));
exampleList.add(new ExampleItem(R.drawable.donalduck, "Line3" , "Line4"));
exampleList.add(new ExampleItem(R.drawable.popey, "Line5" , "Line6"));
exampleList.add(new ExampleItem(R.drawable.mickeymouse, "Line1" , "Line2"));
exampleList.add(new ExampleItem(R.drawable.donalduck, "Line3" , "Line4"));
exampleList.add(new ExampleItem(R.drawable.popey, "Line5" , "Line6"));
exampleList.add(new ExampleItem(R.drawable.mickeymouse, "Line1" , "Line2"));
exampleList.add(new ExampleItem(R.drawable.donalduck, "Line3" , "Line4"));
exampleList.add(new ExampleItem(R.drawable.popey, "Line5" , "Line6"));
exampleList.add(new ExampleItem(R.drawable.mickeymouse, "Line1" , "Line2"));
exampleList.add(new ExampleItem(R.drawable.donalduck, "Line3" , "Line4"));
exampleList.add(new ExampleItem(R.drawable.popey, "Line5" , "Line6"));
mRecyclerView = findViewById(R.id.recyclerView);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(this);
mAdapter = new ExampleAdapter(exampleList);
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setAdapter(mAdapter);
}
}
ExampleAdapter.java
ExampleAdapter.java
package com.agnik.example.myapplication4;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.ArrayList;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
public class ExampleAdapter extends RecyclerView.Adapter<ExampleAdapter.ExampleViewHolder> {
private ArrayList<ExampleItem> mExampleList;
public static class ExampleViewHolder extends RecyclerView.ViewHolder
{
public ImageView mImageView;
public TextView mTextView1;
public TextView mTextView2;
public Button mButton;
public ExampleViewHolder(@NonNull View itemView) {
super(itemView);
mImageView = itemView.findViewById(R.id.imageView);
mTextView1 = itemView.findViewById(R.id.textView);
mTextView2 = itemView.findViewById(R.id.textView2);
mButton = itemView.findViewById(R.id.mybutton);
}
}
public ExampleAdapter(ArrayList<ExampleItem> exampleList)
{
mExampleList = exampleList;
}
@NonNull
@Override
public ExampleViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.example_item, parent, false);
ExampleViewHolder evh = new ExampleViewHolder(v);
return evh;
}
@Override
public void onBindViewHolder(@NonNull ExampleViewHolder holder, int position) {
ExampleItem currentItem = mExampleList.get(position);
holder.mImageView.setImageResource(currentItem.getImageResource());
holder.mTextView1.setText(currentItem.getText1());
holder.mTextView2.setText(currentItem.getText2());
}
@Override
public int getItemCount() {
return mExampleList.size();
}
}
ExampleItem.java
ExampleItem.java
package com.agnik.example.myapplication4;
public class ExampleItem {
private int mImageResource;
private String mText1;
private String mText2;
public ExampleItem(int imageResource, String text1, String text2) {
mImageResource = imageResource;
mText1 = text1;
mText2 = text2;
}
public int getImageResource() {
return mImageResource;
}
public String getText1() {
return mText1;
}
public String getText2() {
return mText2;
}
}
activity_product_page1.xml
activity_product_page1.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ProductPage1">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#008080"
android:padding="4dp"
android:scrollbars="vertical" />
</RelativeLayout>
example_item.xml
example_item.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:cardCornerRadius="4dp">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="4dp">
<ImageView
android:id="@+id/imageView"
android:layout_width="50dp"
android:layout_height="50dp"
android:padding="2dp" />
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toEndOf="@+id/imageView"
android:text="Line 1"
android:textColor="@android:color/black"
android:textSize="20sp"
android:textStyle="bold"
android:layout_toRightOf="@+id/imageView" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView"
android:layout_marginStart="8dp"
android:layout_toEndOf="@+id/imageView"
android:text="Line 2"
android:textSize="15sp"
android:layout_marginLeft="8dp"
android:layout_toRightOf="@+id/imageView" />
<Button
android:id="@+id/mybutton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/textView2"
android:layout_marginStart="8dp"
android:layout_toEndOf="@+id/imageView"
android:text="Purchase"
android:textSize="15sp"
android:layout_marginLeft="8dp"
android:layout_toRightOf="@+id/imageView" />
</RelativeLayout>
</androidx.cardview.widget.CardView>
activity_product_page1.java
activity_product_page1.java
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ProductPage1">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#008080"
android:padding="4dp"
android:scrollbars="vertical" />
</RelativeLayout>
正如Phil所提到的，我需要将setOnClickListener与holder对象一起添加. 但是，当我在ExampleAdapter.java上编写代码时，我无法理解如何将控制权从ProductPage1.class转移到SomeOtherActivity.class?
As mentioned by Phil, I need to add setOnClickListener with the holder object. However, I am not able to understand how should I transfer control from ProductPage1.class to SomeOtherActivity.class as I am writing the code on ExampleAdapter.java?
holder.mButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (position) {
case 1:
Intent i = new Intent(ProductPage1.class, PageDemo1_1.class);
startActivity(i);
break;
case 2:
Intent i = new Intent(ProductPage1.class, PageDemo1_2.class);
startActivity(i);
break;
case 3:
Intent i = new Intent(ProductPage1.class, PageDemo1_3.class);
startActivity(i);
break;
case 4:
Intent i = new Intent(ProductPage1.class, PageDemo1_4.class);
startActivity(i);
break;
case 5:
Intent i = new Intent(ProductPage1.class, PageDemo1_5.class);
startActivity(i);
break;
case 6:
Intent i = new Intent(ProductPage1.class, PageDemo1_6.class);
startActivity(i);
break;
case 7:
Intent i = new Intent(ProductPage1.class, PageDemo1_7.class);
startActivity(i);
break;
default:
Intent i = new Intent(ProductPage1.class, PageDemo1_3.class);
startActivity(i);
break;
}
}
});
推荐答案
此代码显示了每个单击的项目的对话框
This code shows an Dialog on each item clicked
@NonNull
@Override
public ItemViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(parent.getContext());
View view = inflater.inflate(R.layout.recycler_item, null);
final ItemViewHolder viewHolder = new ItemViewHolder(view);
dialoge = new Dialog(parent.getContext());
dialoge.setContentView(R.layout.dialog);
dialoge.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
viewHolder.container.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
setDialog(dialoge, viewHolder);
dialoge.show();
}
});
return viewHolder;
}
，在方法setDialog()中，您将使用
and in the methode setDialog() you get the current item position by using
final RecyclerItem currentItem = itemList.get(viewHolder.getAdapterPosition());
但是我认为最好的做法是考虑使用inerface，这是一个很好的教程，可以遵循 tutorialRecyclerItemOnClickListenerInterface
But i think the best practice is to consider using an inerface and here is a good tutorial to follow tutorialRecyclerItemOnClickListenerInterface
希望对您有帮助
从onClickListnere启动活动:
EDIT : Start an activity from the onClickListnere :
Intent myIntent = new Intent(parent.getContext(),yourActivityName.class);
myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(myIntent);
这篇关于如何为每个recyclerview项的按钮添加功能?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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