- Android Quote App with MVVM

activity_quotes_learning.xml

<!-
 * Author Ikhlaq Yousuf Malik
 * Created on 19-Nov-2022
!>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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=".quotes_learning.network.QuotesLearningActivity">

    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
        android:id="@+id/srl_quotes"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:id="@+id/id_quote"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center_vertical|center_horizontal"
            android:padding="@dimen/_20dp"
            android:text="quote"
            android:textColor="@color/black"
            android:textSize="32sp"
            android:textStyle="italic" />

    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>


</LinearLayout>

api_link.txt

https://type.fit/api/quotes

GenericResponse.kt

/*
 * Author Ikhlaq Yousuf Malik
 * Created on 19-Nov-2022
*/

package com.maple.kashin.core

data class GenericResponse<T>(val data: T?, val success: Boolean, val message: String?)

QuotesAPIClasss.kt

/*
 * Author Ikhlaq Yousuf Malik
 * Created on 19-Nov-2022
*/

package com.maple.kashin.quotes_learning.network

import retrofit2.Retrofit
import retrofit2.converter.gson.GsonConverterFactory

class QuotesAPIClasss {

    private lateinit var retrofit: Retrofit

    fun getClient() : Retrofit {
        retrofit = Retrofit
            .Builder()
            .baseUrl("https://type.fit/api/")
            .addConverterFactory(GsonConverterFactory.create())
            .build()

        return retrofit
    }
}

QuotesLearningActivity.kt

/*
 * Author Ikhlaq Yousuf Malik
 * Created on 19-Nov-2022
*/

package com.maple.kashin.quotes_learning.network

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import androidx.lifecycle.ViewModelProvider
import com.maple.kashin.databinding.ActivityQuotesLearningBinding
import com.maple.kashin.quotes_learning.network.utils.QuotesLearningResponseModelItem
import com.maple.kashin.quotes_learning.network.utils.QuotesLearningViewModel
import kotlin.random.Random

class QuotesLearningActivity : AppCompatActivity() {

    private lateinit var binding: ActivityQuotesLearningBinding
    private lateinit var mQuotesLearningViewModel: QuotesLearningViewModel
    private var mQuotes: List<QuotesLearningResponseModelItem?> = arrayListOf()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityQuotesLearningBinding.inflate(layoutInflater)
        setContentView(binding.root)

        mQuotesLearningViewModel = ViewModelProvider(this).get(QuotesLearningViewModel::class.java)
        mQuotesLearningViewModel.getQuotes()

        mQuotesLearningViewModel.getQuotesLearningLiveData().observe(this) {
            if (!it.success) return@observe
            if (it.data == null) return@observe
            mQuotes = it.data
            Log.d("DATA", it.data.toString())
        }

        binding.srlQuotes.setOnRefreshListener {
            if (mQuotes.isNotEmpty()) {
                binding.idQuote.text = mQuotes[Random.nextInt(0, mQuotes.size - 1)]?.text.toString()
            }
            binding.srlQuotes.isRefreshing = false
        }

    }
}

QuotesLearningAPIInterface.kt

/*
 * Author Ikhlaq Yousuf Malik
 * Created on 19-Nov-2022
*/

package com.maple.kashin.quotes_learning.network.utils

import retrofit2.Call
import retrofit2.http.GET

interface QuotesLearningAPIInterface {

    @GET("quotes")
    fun getQuotes(): Call<List<QuotesLearningResponseModelItem?>?>

}

QuotesLearningNetworkDataSource.kt

/*
 * Author Ikhlaq Yousuf Malik
 * Created on 19-Nov-2022
*/

package com.maple.kashin.quotes_learning.network.utils

import androidx.lifecycle.MutableLiveData
import com.maple.kashin.core.GenericResponse
import com.maple.kashin.quotes_learning.network.QuotesAPIClasss
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response

class QuotesLearningNetworkDataSource {

    fun getQuotes(
        data: MutableLiveData<GenericResponse<List<QuotesLearningResponseModelItem?>?>>
    ) = QuotesAPIClasss().getClient().create(QuotesLearningAPIInterface::class.java)
        .getQuotes()
        .enqueue(object : Callback<List<QuotesLearningResponseModelItem?>?> {
            override fun onResponse(
                call: Call<List<QuotesLearningResponseModelItem?>?>,
                response: Response<List<QuotesLearningResponseModelItem?>?>
            ) {
                if (response.isSuccessful) {
                    data.value = GenericResponse<List<QuotesLearningResponseModelItem?>?>(
                        response.body(),
                        true,
                        null
                    )
                } else {
                    data.value = GenericResponse<List<QuotesLearningResponseModelItem?>?>(
                        null,
                        false,
                        response.message()
                    )
                }
            }

            override fun onFailure(
                call: Call<List<QuotesLearningResponseModelItem?>?>,
                t: Throwable
            ) {
                data.value = GenericResponse<List<QuotesLearningResponseModelItem?>?>(
                    null,
                    false,
                    t.message
                )
            }

        })
}

QuotesLearningRepository.kt

/*
 * Author Ikhlaq Yousuf Malik
 * Created on 19-Nov-2022
*/

package com.maple.kashin.quotes_learning.network.utils

import androidx.lifecycle.MutableLiveData
import com.maple.kashin.core.GenericResponse

class QuotesLearningRepository {

    private var mQuotesLearningNetworkDataSource: QuotesLearningNetworkDataSource =
        QuotesLearningNetworkDataSource()

    fun getQuotes(
        data: MutableLiveData<GenericResponse<List<QuotesLearningResponseModelItem?>?>>
    ) = mQuotesLearningNetworkDataSource.getQuotes(data)

}

QuotesLearningResponseModel.kt

/*
 * Author Ikhlaq Yousuf Malik
 * Created on 19-Nov-2022
*/


package com.maple.kashin.quotes_learning.network.utils

import android.os.Parcelable
import com.google.gson.annotations.SerializedName
import kotlinx.android.parcel.Parcelize

@Parcelize
data class QuotesLearningResponseModel(

	@field:SerializedName("QuotesLearningResponseModel")
	val quotesLearningResponseModel: List<QuotesLearningResponseModelItem?>? = null
) : Parcelable

@Parcelize
data class QuotesLearningResponseModelItem(

	@field:SerializedName("author")
	val author: String? = null,

	@field:SerializedName("text")
	val text: String? = null
) : Parcelable

QuotesLearningViewModel.kt

package com.maple.kashin.quotes_learning.network.utils

import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.ViewModel
import com.maple.kashin.core.GenericResponse
/*
 * Author Ikhlaq Yousuf Malik
 * Created on 19-Nov-2022
*/

class QuotesLearningViewModel : ViewModel() {

    private var mQuotesLearningRepository: QuotesLearningRepository = QuotesLearningRepository()

    private val mLearningQuotesLiveData: MutableLiveData<GenericResponse<List<QuotesLearningResponseModelItem?>?>> =
        MutableLiveData<GenericResponse<List<QuotesLearningResponseModelItem?>?>>()

    fun getQuotesLearningLiveData(): LiveData<GenericResponse<List<QuotesLearningResponseModelItem?>?>> {
        return mLearningQuotesLiveData
    }

    fun getQuotes() {
        mQuotesLearningRepository.getQuotes(mLearningQuotesLiveData)
    }

}