为什么所有的图片不在第一列,而文本视图在第二列在安卓中?

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英文:

Why are all the images not coming to first column and the textviews two second column in android?

问题

抱歉,我只能提供翻译,无法执行代码或提供代码方面的帮助。

根据您提供的信息,您认为在 XML 布局文件中存在一些问题。如果您需要帮助,请描述具体的问题或错误,我将尽力提供解决方案或建议。

英文:

So, i have a list of images and another list of names of those images. I want to display all the images one below other in cardviews of first column and all the names one below other on cardviews in second column. But I am getting the like this 为什么所有的图片不在第一列,而文本视图在第二列在安卓中?

So, I want all the images strictly in first column and the names on second column.Below is my xml layout files fragment_practise.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:tools="http://schemas.android.com/tools">
    <androidx.appcompat.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/flash_tablebar"
        android:elevation="4dp"
        android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
        android:layout_alignParentTop="true">

        <ImageView
            android:id="@+id/back_icon"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:src="@drawable/ic_arrow_back" />
    </androidx.appcompat.widget.Toolbar>


    <!-- RecyclerView to display the image cards -->
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerViewPractise"
        android:layout_below="@id/toolbar"
        android:layout_width="match_parent"
        tools:listitem="@layout/item_practise_cards"
        android:layout_marginTop="10dp"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:padding="16dp" />

</RelativeLayout>

item_practise_cards.xml

<GridLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:columnCount="2"
    android:orientation="horizontal"
    android:padding="8dp">

    <androidx.cardview.widget.CardView
        android:id="@+id/cardImagePractise"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_margin="4dp"
        android:onClick="onCardClick"
        android:clickable="true"
        android:foreground="?android:attr/selectableItemBackground">

        <ImageView
            android:id="@+id/imageViewPractise"
            android:layout_width="150dp"
            android:layout_height="150dp"
            android:scaleType="centerCrop" />
    </androidx.cardview.widget.CardView>

    <androidx.cardview.widget.CardView
        android:id="@+id/cardTextPractise"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_margin="4dp"
        android:onClick="onCardClick"
        android:clickable="true"
        android:foreground="?android:attr/selectableItemBackground">

        <TextView
            android:id="@+id/textViewPractise"
            android:layout_width="wrap_content"
            android:gravity="center"
            android:layout_height="wrap_content"
            android:text="Random Name"
            android:textSize="18sp" />
    </androidx.cardview.widget.CardView>
</GridLayout>

Following the Fragment class PractiseFragment.kt

package com.example.visuallithuanian.ui.activities.fragments

import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.MenuItem
import android.view.View
import android.view.ViewGroup
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.appcompat.widget.Toolbar
import androidx.recyclerview.widget.GridLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.example.visuallithuanian.R
import com.example.visuallithuanian.adapter.PractiseAdapter
import com.example.visuallithuanian.databinding.FragmentPractiseBinding
import dagger.hilt.android.AndroidEntryPoint
class PractiseFragment : Fragment() {
     lateinit var binding: FragmentPractiseBinding
    lateinit var recyclerView: RecyclerView
    private val imageNamesMap= HashMap<Int,String>()

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View {
        // Inflate the layout for this fragment

        binding = FragmentPractiseBinding.inflate(layoutInflater,container,false)

        (requireActivity() as AppCompatActivity).setSupportActionBar(binding.toolbar)
        (requireActivity() as AppCompatActivity).supportActionBar?.setDisplayHomeAsUpEnabled(true)

        populateImages()

        binding.recyclerViewPractise.layoutManager = GridLayoutManager(requireContext(),2)
       binding.recyclerViewPractise.adapter = PractiseAdapter(imageNamesMap)


        return binding.root

    }

    private fun populateImages() {
        // Add image resources to a list
        val imageResources = listOf(
            R.drawable.africa,
            R.drawable.asia,
            R.drawable.europe,
            R.drawable.antartica,
            R.drawable.australia
            // Add more image resources as needed
        )

        // Add image names to a list in random order
        val imageNames = listOf(
            "Africa",
            "Asia",
            "Europe",
            "Antarctica",
            "Australia"
            // Add more image names corresponding to the resources
        ).shuffled()

        // Use the shuffled names to assign each image resource ID a corresponding name in the imageNamesMap
        for (i in imageResources.indices) {
            imageNamesMap[imageResources[i]] = imageNames[i]
        }
    }


    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        when(item.itemId){

            android.R.id.home->{
                requireActivity().onBackPressed()
                return true
            }
        }
        return super.onOptionsItemSelected(item)
    }

    // Handle card clicks for both card views
    fun onCardClick(view: View,position: Int) {
        // Check the clicked view's ID to identify which cardView was clicked
        when (view.id) {
            R.id.cardImagePractise -> {
                Toast.makeText(requireContext(),"Hello Card Image",Toast.LENGTH_SHORT).show()
            }
            R.id.cardTextPractise -> {
                Toast.makeText(requireContext(),"Hello Card Text",Toast.LENGTH_SHORT).show()
            }
        }
    }


}

Below is the adapter class PractiseAdapter.kt

package com.example.visuallithuanian.adapter

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import android.widget.TextView
import android.widget.Toast
import androidx.cardview.widget.CardView
import androidx.recyclerview.widget.RecyclerView
import com.example.visuallithuanian.R

class PractiseAdapter(private val imageNamesMap: HashMap<Int, String>) :
    RecyclerView.Adapter<PractiseAdapter.PractiseViewHolder>() {

    private val imagesList: MutableList<Int> = imageNamesMap.keys.toMutableList()

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PractiseViewHolder {
        val view = LayoutInflater.from(parent.context).inflate(R.layout.item_practise_cards, parent, false)
        return PractiseViewHolder(view)
    }

    override fun getItemCount(): Int = imagesList.size

    override fun onBindViewHolder(holder: PractiseViewHolder, position: Int) {
        val imageResource = imagesList[position]
        val imageName = imageNamesMap[imageResource]

        holder.imageViewPractise.setImageResource(imageResource)
        holder.textViewPractise.text = imageName

        holder.cardImagePractise.setOnClickListener {
            onCardClick(it, position)
        }

        holder.cardTextPractise.setOnClickListener {
            onCardClick(it, position)
        }
    }

    class PractiseViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
        val cardImagePractise: CardView = itemView.findViewById(R.id.cardImagePractise)
        val cardTextPractise: CardView = itemView.findViewById(R.id.cardTextPractise)
        val imageViewPractise: ImageView = itemView.findViewById(R.id.imageViewPractise)
        val textViewPractise: TextView = itemView.findViewById(R.id.textViewPractise)
    }

    private fun onCardClick(view: View, position: Int) {
        // Check the clicked view's ID to identify which cardView was clicked
        when (view.id) {
            R.id.cardImagePractise -> {
                // Handle image card click
                Toast.makeText(view.context, "Image clicked at position $position", Toast.LENGTH_SHORT).show()
            }
            R.id.cardTextPractise -> {
                // Handle text card click
                Toast.makeText(view.context, "Text clicked at position $position", Toast.LENGTH_SHORT).show()
            }
        }
    }
}

I believe there is some issues in xml layout file

答案1

得分: 1

在你的情况下,你正在使用 span 为 2 的 GridLayoutManager。这就是为什么它以每行两列的方式显示图像项。

最简单的解决方案是,在 RecyclerView 中设置垂直方向的 LinearLayoutManager。

你可以在 XML 中设置布局管理器:

<androidx.recyclerview.widget.RecyclerView
    android:id="@+id/recyclerViewPractise"
    android:layout_below="@id/toolbar"
    android:layout_width="match_parent"
    tools:listitem="@layout/item_practise_cards"
    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
    android:orientation="vertical"
    android:layout_marginTop="10dp"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp" />

或者在代码中设置:

binding.recyclerViewPractise.layoutManager = LinearLayoutManager(requireContext(), LinearLayoutManager.VERTICAL, false)

希望对你有所帮助。

英文:

In your case, you are setting GridLayoutManager with span count 2. Which is way its showing image items in two columns per row.

simplest solution is, set LinearLayoutManager in recyclerview with orientation vertical.

You can set LayoutManager in xml as

&lt;androidx.recyclerview.widget.RecyclerView
    android:id=&quot;@+id/recyclerViewPractise&quot;
    android:layout_below=&quot;@id/toolbar&quot;
    android:layout_width=&quot;match_parent&quot;
    tools:listitem=&quot;@layout/item_practise_cards&quot;
    **app:layoutManager=&quot;android.support.v7.widget.LinearLayoutManager&quot;
    android:orientation=&quot;vertical&quot;**
    android:layout_marginTop=&quot;10dp&quot;
    android:layout_height=&quot;match_parent&quot;
    android:orientation=&quot;vertical&quot;
    android:padding=&quot;16dp&quot; /&gt;

Or programmatically as

        binding.recyclerViewPractise.layoutManager = LinearLayoutManager(requireContext(), LinearLayoutManager.VERTICAL, false)

Hope this helps

答案2

得分: 1

我建议您改用约束布局(ConstraintLayout)而不是网格布局(GridLayout)来将两个 CardView 放在一起。

所以你的 item_practise_cards.xml 应该像这样:

<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="8dp">

    <androidx.cardview.widget.CardView
        android:id="@+id/cardImagePractise"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        
        app:layout_constraintEnd_toStartOf="@id/cardTextPractise"
        app:layout_constraintStart_toStartOf="parent"

        android:layout_margin="4dp"
        android:onClick="onCardClick"
        android:clickable="true"
        android:foreground="?android:attr/selectableItemBackground">

        <ImageView
            android:id="@+id/imageViewPractise"
            android:layout_width="150dp"
            android:layout_height="150dp"
            android:scaleType="centerCrop" />
    </androidx.cardview.widget.CardView>

    <androidx.cardview.widget.CardView
        android:id="@+id/cardTextPractise"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"

        app:layout_constraintStart_toEndOf="@id/cardImagePractise"
        app:layout_constraintEnd_toEndOf="parent"

        android:layout_margin="4dp"
        android:onClick="onCardClick"
        android:clickable="true"
        android:foreground="?android:attr/selectableItemBackground">

        <TextView
            android:id="@+id/textViewPractise"
            android:layout_width="wrap_content"
            android:gravity="center"
            android:layout_height="wrap_content"
            android:text="随机名称"
            android:textSize="18sp" />
    </androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>

注意:上面的代码片段是 XML 布局代码,用于在 Android 应用中创建两个 CardView 并使用约束布局将它们放在一起。

英文:

I would suggest you to use constraint layout instead of GridLayout to have to CardViews side by side.

So your item_practise_cards.xml will be something like this:

&lt;androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
    android:layout_width=&quot;match_parent&quot;
    android:layout_height=&quot;wrap_content&quot;
    android:padding=&quot;8dp&quot;&gt;

    &lt;androidx.cardview.widget.CardView
        android:id=&quot;@+id/cardImagePractise&quot;
        android:layout_width=&quot;wrap_content&quot;
        android:layout_height=&quot;wrap_content&quot;
        
        app:layout_constraintEnd_toStartOf=&quot;@id/cardTextPractise&quot;
        app:layout_constraintStart_toStartOf=&quot;parent&quot;

        android:layout_margin=&quot;4dp&quot;
        android:onClick=&quot;onCardClick&quot;
        android:clickable=&quot;true&quot;
        android:foreground=&quot;?android:attr/selectableItemBackground&quot;&gt;

        &lt;ImageView
            android:id=&quot;@+id/imageViewPractise&quot;
            android:layout_width=&quot;150dp&quot;
            android:layout_height=&quot;150dp&quot;
            android:scaleType=&quot;centerCrop&quot; /&gt;
    &lt;/androidx.cardview.widget.CardView&gt;

    &lt;androidx.cardview.widget.CardView
        android:id=&quot;@+id/cardTextPractise&quot;
        android:layout_width=&quot;wrap_content&quot;
        android:layout_height=&quot;wrap_content&quot;

        app:layout_constraintStart_toEndOf=&quot;@id/cardImagePractise&quot;
        app:layout_constraintEnd_toEndOf=&quot;parent&quot;

        android:layout_margin=&quot;4dp&quot;
        android:onClick=&quot;onCardClick&quot;
        android:clickable=&quot;true&quot;
        android:foreground=&quot;?android:attr/selectableItemBackground&quot;&gt;

        &lt;TextView
            android:id=&quot;@+id/textViewPractise&quot;
            android:layout_width=&quot;wrap_content&quot;
            android:gravity=&quot;center&quot;
            android:layout_height=&quot;wrap_content&quot;
            android:text=&quot;Random Name&quot;
            android:textSize=&quot;18sp&quot; /&gt;
    &lt;/androidx.cardview.widget.CardView&gt;
&lt;/androidx.constraintlayout.widget.ConstraintLayout&gt;

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  • 本文由 发表于 2023年7月23日 16:46:42
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