Install Android SDK CLI Ubuntu 20.04 WSL2 (Work in Progress)

README.md

Install Android SDK CLI Ubuntu 20.04 WSL2 (Work in Progress)

Install Java 8

sudo apt install openjdk-8-jdk-headless

Android SDK

wget https://dl.google.com/android/repository/commandlinetools-linux-6200805_latest.zip
mkdir -p Android/Sdk
unzip commandlinetools-linux-6200805_latest.zip -d Android/Sdk

export ANDROID_HOME=$HOME/Android/Sdk
# Make sure emulator path comes before tools. Had trouble on Ubuntu with emulator from /tools being loaded
# instead of the one from /emulator
export PATH="$ANDROID_HOME/emulator:$ANDROID_HOME/tools:$ANDROID_HOME/tools/bin:$ANDROID_HOME/platform-tools:$PATH"

sdkmanager --sdk_root=${ANDROID_HOME} "tools"

sdkmanager --update
sdkmanager --list
sdkmanager "build-tools;28.0.3" "platform-tools" "platforms;android-28" "tools"
sdkmanager --licenses

sudo apt install gradle

Note: you can get an updated Android SDK link from https://developer.android.com/studio/#downloads

Used a combinaton of these gists: https://gist.github.com/fedme/fd42caec2e5a7e93e12943376373b7d0 https://gist.github.com/jjvillavicencio/18feb09f0e93e017a861678bc638dcb0

Background on the update to command line tools from android sdk https://stackoverflow.com/a/61176718

main_activity.xml

<?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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <androidx.coordinatorlayout.widget.CoordinatorLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <com.google.android.material.appbar.AppBarLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content">

                <com.google.android.material.appbar.MaterialToolbar
                    android:id="@+id/topAppBar"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:navigationIcon="@drawable/baseline_menu_24"
                    app:title="@string/app_name" />

            </com.google.android.material.appbar.AppBarLayout>


        </androidx.coordinatorlayout.widget.CoordinatorLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_margin="12dp"
            android:gravity="center"
            android:orientation="vertical">

            <com.google.android.material.textview.MaterialTextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="16dp"
                android:text="@string/calc_type_length"
                android:textSize="24sp" />

            <com.google.android.material.textfield.TextInputLayout
                android:id="@+id/fromTextField"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="16dp"
                android:hint="@string/input_number">

                <com.google.android.material.textfield.TextInputEditText
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:inputType="numberDecimal" />

            </com.google.android.material.textfield.TextInputLayout>

            <com.google.android.material.textfield.TextInputLayout
                android:id="@+id/fromUnitInput"
                style="@style/Widget.Material3.TextInputLayout.FilledBox.ExposedDropdownMenu"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="16dp"
                android:hint="@string/fromUnitHint">

                <AutoCompleteTextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:simpleItems="@array/units_menu_array"
                    tools:ignore="LabelFor" />

            </com.google.android.material.textfield.TextInputLayout>

            <com.google.android.material.textfield.TextInputLayout
                android:id="@+id/toUnitInput"
                style="@style/Widget.Material3.TextInputLayout.FilledBox.ExposedDropdownMenu"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="16dp"
                android:hint="@string/toUnitHint">

                <AutoCompleteTextView
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:simpleItems="@array/units_menu_array"
                    tools:ignore="LabelFor" />

            </com.google.android.material.textfield.TextInputLayout>

            <com.google.android.material.button.MaterialButton
                android:id="@+id/convertButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="16dp"
                android:text="@string/convert">

            </com.google.android.material.button.MaterialButton>

            <com.google.android.material.textview.MaterialTextView
                android:id="@+id/outputTextView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="">

            </com.google.android.material.textview.MaterialTextView>
        </LinearLayout>


    </LinearLayout>


</LinearLayout>

MainActivity.kt

package ru.nm17.calcpracticeview

import android.os.Bundle
import android.util.Log
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.ViewCompat
import androidx.core.view.WindowInsetsCompat
import com.google.android.material.button.MaterialButton
import com.google.android.material.textfield.TextInputLayout
import com.google.android.material.textview.MaterialTextView

class MainActivity : AppCompatActivity() {
    private lateinit var fromInput: TextInputLayout

    private val fromInputValue: Float?
        get() = fromInput.editText!!.text.toString().toFloatOrNull()

    private lateinit var fromUnit: TextInputLayout

    private val fromUnitValue: String
        get() = fromUnit.editText!!.text.toString()

    private lateinit var toUnit: TextInputLayout
    private val toUnitValue: String
        get() = toUnit.editText!!.text.toString()

    private lateinit var convertButton: MaterialButton
    private lateinit var outputTextView: MaterialTextView


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContentView(R.layout.activity_main)
        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
            insets
        }

        fromInput = findViewById(R.id.fromTextField)
        fromUnit = findViewById(R.id.fromUnitInput)
        toUnit = findViewById(R.id.toUnitInput)
        convertButton = findViewById(R.id.convertButton)
        outputTextView = findViewById(R.id.outputTextView)


        convertButton.setOnClickListener {
            if (fromInputValue == null) {
                fromInput.error = "Пустое поле"
                return@setOnClickListener
            }
            val asd = Pair(fromUnitValue, toUnitValue);
            var meters = 0.0f;
            meters = when (fromUnitValue) {
                "м" -> fromInputValue!!
                "км" -> fromInputValue!! / 1000
                "in" -> fromInputValue!! * 0.0254f
                "ft" -> fromInputValue!! * 0.3048f
                else -> {
                    fromInput.error = "Не верный входной тип"
                    return@setOnClickListener
                }
            }.toFloat()

            val result = when (toUnitValue) {
                "m" -> meters
                "km" -> meters / 1000.0f
                "ft" -> meters * (3 + 428.0f/127.0f)
                "in" -> meters * (5000.0f/127.0f)
                else -> {
                    fromInput.error = "Не верный итоговый тип"
                    return@setOnClickListener
                }
            }

            outputTextView.text = getString(R.string.result_format_string).format(result, toUnitValue)
        }
    }
}