mylab

em kotlin: uma ListView XML array adapter personalizada v2 (numeros)

ficheiro: MainActivity.kt

package pt.deis.estuda.estudoslistview2

import android.content.Intent
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View

const val TAG = "ListView"

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }

    fun onList2View(view: View) {
        val intent = Intent(this,ListView3Activity::class.java)
        startActivity(intent)
    }
}

ficheiro: activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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=".MainActivity">

    <Button
        android:onClick="onList2View"
        android:id="@+id/button"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:padding="16dp"
        android:text="ListView XML array adapter personalizado v2"
        android:textSize="24sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

ficheiro: activity_list3_view.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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=".ListView3Activity">

    <ListView
        android:id="@+id/terceiraListView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</FrameLayout>

ficheiro: arrays.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="dados_str">
        <item>Portugal</item>
        <item>Espanha</item>
        <item>Franca</item>
        <item>Italia</item>
        <item>Alemanha</item>
        <item>Belgica</item>
        <item>Holanda</item>
        <item>Austria</item>
        <item>Luxemburgo</item>
        <item>Suecia</item>
        <item>Dinamarca</item>
        <item>Irlanda</item>
        <item>Croacia</item>
        <item>Eslovenia</item>
        <item>Eslovaquia</item>
        <item>Estonia</item>
        <item>Polonia</item>
        <item>Grecia</item>
        <item>Finlandia</item>
        <item>Chipre</item>
        <item>Malta</item>
        <item>Bulgaria</item>
        <item>Hungria</item>
        <item>Romenia</item>
        <item>Rep. Checa</item>
        <item>Letonia</item>
        <item>Lituania</item>
    </string-array>
</resources>

ficheiro: AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="pt.deis.estuda.estudoslistview3">
    <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/Theme.Estudoslistview3">

        <activity
            android:name=".ListView3Activity"
            android:label="ListView"
            android:parentActivityName=".MainActivity" />

        <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>

ficheiro: ListView3Activity.kt

package pt.deis.estuda.estudolistview3

import android.os.Bundle
import android.util.Log
import android.widget.SimpleAdapter
import androidx.appcompat.app.AppCompatActivity
import kotlinx.android.synthetic.main.activity_list3_view.*
import kotlin.random.Random

class ListView3Activity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_list3_view)

        supportActionBar?.setDisplayHomeAsUpEnabled(true)
        supportActionBar?.subtitle = "Exemplo 3"

        val paises = resources.getStringArray(R.array.dados_str)
        paises.sort()
        /*
        val data1 = mapOf("valor1" to 10, "valor2" to 20)
        val data2 = mapOf("valor1" to 11, "valor2" to 21)
        val data = mutableListOf(data1,data2)
        */

        val data = mutableListOf<Map<String,Any>>()
        //Any() para ser qualquer tipo de dados

        //val i = Random.nextInt(10,20)
        for(p in paises) {
            val item = mapOf<String,Any>("valor1" to p,
                "valor2" to Random.nextInt(100000,99000000),
                "imagem" to android.R.drawable.ic_menu_compass)
            data.add(item)
        }
        val adapter = SimpleAdapter(this,
            data,
            R.layout.listview3_item,
            arrayOf("valor1","valor2","imagem"),
            intArrayOf(R.id.tv1,
                R.id.tv2,
                R.id.ivImg) )
        //tv1 (recebe valor1), tv2 (recebe valor2)... dados das linhas
        terceiraListView.adapter = adapter

        terceiraListView.setOnItemClickListener() {
                parent, view, pos, id ->

            Log.i(TAG, "Item: $pos $id")

        }
    }
}

ficheiro: listview3_item.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="4dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:padding="4dp"
        android:background="#800000">
        <ImageView
            android:id="@+id/ivImg"
            android:src="@android:drawable/ic_dialog_map"
            android:layout_width="32dp"
            android:layout_height="32dp" />
        <TextView
            android:textStyle="bold"
            android:padding="4dp"
            android:textSize="20sp"
            android:text="text1"
            android:layout_width="0dp"
            android:layout_weight="2"
            android:layout_height="wrap_content"
            android:id="@+id/tv1"
            android:textColor="#000000"
            android:background="#f0d080"/>
        <TextView
            android:padding="4dp"
            android:textSize="20sp"
            android:gravity="right"
            android:text="text2"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:id="@+id/tv2"
            android:background="#80d0f0"/>
    </LinearLayout>
</FrameLayout>

ficheiro: build.gralde (Module)

plugins {
    id 'com.android.application'
    id 'kotlin-android'
    id 'kotlin-android-extensions' // obrigatorio para aceder aos diferentes layouts sem usar o findId
}
...