This example demonstrates how to make a GridLayout fit screen size in Android using Kotlin.
Step 1 − Create a new project in a new project
Step 2 − Add the following code to res/layout/activity_main.xml.
<?xml version="1.0" encoding="utf-8"?> <GridLayout xmlns:android="https://schemas.android.com/apk/res/android" xmlns:tools="https://schemas.android.com/tools" android:id="@+id/tableGrid" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:columnCount="4" android:orientation="horizontal" tools:context=".MainActivity"> <Button android:text="1" /> <Button android:text="2" /> <Button android:text="3" /> <Button android:text="4" /> <Button android:text="5" /> <Button android:text="6" /> <Button android:text="7" /> <Button android:text="8" /> <Button android:text="9" /> <Button android:text="10" /> <Button android:text="11" /> <Button android:text="12" /> <Button android:text="13" /> <Button android:text="14" /> <Button android:text="15" /> <Button android:text="16" /> </GridLayout>
Step 3 − Add the following code to src/MainActivity.kt
import android.os.Bundle import android.view.Gravity import android.widget.GridLayout import android.widget.ImageView import android.widget.TableLayout import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) title = "KotlinApp" val gridLayout = findViewById<GridLayout>(R.id.tableGrid) gridLayout.removeAllViews() val total = 12 val column = 5 val row = total / column gridLayout.columnCount = column gridLayout.rowCount = row + 1 var i = 0 var c = 0 var r = 0 while (i < total) { if (c == column) { c = 0 r++ } val oImageView = ImageView(this) oImageView.setImageResource(R.drawable.ic_launcher_background) val param = GridLayout.LayoutParams() param.height = TableLayout.LayoutParams.WRAP_CONTENT param.width = TableLayout.LayoutParams.WRAP_CONTENT param.rightMargin = 5 param.topMargin = 5 param.setGravity(Gravity.CENTER) param.columnSpec = GridLayout.spec(c) param.rowSpec = GridLayout.spec(r) oImageView.layoutParams = param gridLayout.addView(oImageView) i++ c++ } } }
Step 4 − Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="https://schemas.android.com/apk/res/android" package="com.example.q11"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen.