In this example, we will see how to read file from asset folder and set into android widgets components using the Kotlin language.
Here we start the implementation.
IMPLEMENTATION:
Step 1: Create a new Project in android studio.
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Go to File > New > New Project > Empty Activity > Next > Enter Name > Select Language Kotlin > Finish
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Step 2: Create a new assets folder by using
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app > right-click > new > Folder > Assets Folder > FINISH.
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Step 3: Create a new file in Notepad and paste the following code.
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[
{
"userId": 1,
"name": "Mohit"
},
{
"userId": 2,
"name": "Nikita"
},
{
"userId": 3,
"name": "John"
},
{
"userId": 4,
"name": "Partik"
},
{
"userId": 5,
"name": "Henna"
},
{
"userId": 6,
"name": "Hessal"
}
]
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and save it with name (data.json).
Step 4: Copy the file from your pc and paste inside Assets folder in Android Studio.
Step 5: Now open the activity_main.xml file and add the following code.
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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<ScrollView
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="20dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView"
/>
</ScrollView>
</LinearLayout>
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Step 6: Go to MainActivity.kt file and add the following code below setContentView(R.layout.activity_main.xml).
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val data = readFromAsset()
val textView = findViewById(R.id.textView)
textView.setText(data)
}
private fun readFromAsset(): String {
val file_name = "data.json"
val bufferReader = application.assets.open(file_name).bufferedReader()
val data = bufferReader.use {
it.readText()
}
Log.d("Read", data)
return data;
}
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Step 7: Run the app in your emulator or real device, you will get the output as given below:
OUTPUT:
Complete Source Code of Read files from Assets Example:
activity_main.xml file
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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<ScrollView
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="20dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView"
/>
</ScrollView>
</LinearLayout>
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MainActivity.kt file
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import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import android.widget.TextView
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val data = readFromAsset()
val textView = findViewById(R.id.textView)
textView.setText(data)
}
private fun readFromAsset(): String {
val file_name = "data.json"
val bufferReader = application.assets.open(file_name).bufferedReader()
val data = bufferReader.use {
it.readText()
}
Log.d("Read", data)
return data;
}
}
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Conclusion: We have covered the topic of how to read file from assets folder in Android Studio using Kotlin.
