Android

Android DataBinding RecyclerView – Profile Screen

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I’ll provide you with a sample code and explanation for creating a profile screen with a RecyclerView using Android DataBinding. Here’s a step-by-step guide:

Step 1: Set up your project
Create a new Android project in Android Studio. Make sure you have the necessary dependencies in your build.gradle file:

android {
    // ...
    dataBinding {
        enabled = true
    }
}

Step 2: Create the layout files
Create the following layout files in your project:

activity_profile.xml:

<layout xmlns:android="http://schemas.android.com/apk/res/android">
    <data>
        <variable
            name="viewModel"
            type="com.example.yourapp.ProfileViewModel" />
    </data>

    <!-- Your profile screen layout here -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recyclerView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:items="@{viewModel.blogItems}"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
            app:itemLayout="@layout/item_blog" />
    </LinearLayout>
</layout>

item_blog.xml:

<layout xmlns:android="http://schemas.android.com/apk/res/android">
    <data>
        <variable
            name="blog"
            type="com.example.yourapp.BlogItem" />
    </data>

    <!-- Your blog item layout here -->
</layout>

Step 3: Create the ViewModel and BlogItem classes
Create the following classes in your project:

ProfileViewModel.kt:

class ProfileViewModel : ViewModel() {
    val blogItems: LiveData<List<BlogItem>> = MutableLiveData(
        listOf(
            BlogItem("Title 1", "Content 1"),
            BlogItem("Title 2", "Content 2"),
            BlogItem("Title 3", "Content 3")
        )
    )
}

class BlogItem(val title: String, val content: String)

Step 4: Create the Adapter and ViewHolder
Create the following classes in your project:

BlogAdapter.kt:

class BlogAdapter(private val blogItems: List<BlogItem>) :
    RecyclerView.Adapter<BlogAdapter.ViewHolder>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        val inflater = LayoutInflater.from(parent.context)
        val binding: ItemBlogBinding = DataBindingUtil.inflate(
            inflater, R.layout.item_blog, parent, false
        )
        return ViewHolder(binding)
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        holder.bind(blogItems[position])
    }

    override fun getItemCount(): Int = blogItems.size

    class ViewHolder(private val binding: ItemBlogBinding) :
        RecyclerView.ViewHolder(binding.root) {

        fun bind(blogItem: BlogItem) {
            binding.blog = blogItem
            binding.executePendingBindings()
        }
    }
}

Step 5: Connect everything in your Activity or Fragment
Update your ProfileActivity or ProfileFragment to include the following code:

ProfileActivity.kt:

class ProfileActivity : AppCompatActivity() {

    private lateinit var binding: ActivityProfileBinding

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = DataBindingUtil.setContentView(this, R.layout.activity_profile)

        val viewModel = ViewModelProvider(this).get(ProfileViewModel::class.java)
        binding.viewModel = viewModel

        val adapter = BlogAdapter(viewModel.blogItems.value ?: emptyList())
        binding.recyclerView.adapter = adapter
    }
}

That’s it! You have now created a profile screen with a RecyclerView using Android DataBinding. Make sure to replace com.example.yourapp it with the appropriate package name in the code.

Remember to customize the layout files and the BlogItem class according to your requirements. You can also update the blog items dynamically by modifying the blogItems LiveData in the ViewModel.

Hope this helps you get started with your profile screen implementation!

Vishal Swami is a hardcore Android programmer and Android programming has been his passion since he compiled his first hello-world program. Solving real problems of Android developers through tutorials has always been an interesting part for him.

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