Kotlin Picasso

PicassoActivity.kt

package com.example.hoge

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import com.squareup.picasso.Picasso
import kotlinx.android.synthetic.main.activity_picassotest.*

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

        Picasso.get()
            //いらすとやの画像URL
            .load("https://1.bp.blogspot.com/-kwMHBpDRC98/WMfCOCDhmCI/AAAAAAABClk/0YhKPlx69H8akEluJniMmVV-RoJCRtPvACLcB/s800/onsei_ninshiki_smartphone.png")
            .resize(300, 300) //表示サイズ指定
            .centerCrop() //resizeで指定した範囲になるよう中央から切り出し
            .into(imageViewtest) //imageViewに流し込み
    }
}

activity_picassotest.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/imageViewtest"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
</RelativeLayout>

build.gradle(Module: app)

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.core:core-ktx:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
    implementation "com.fasterxml.jackson.module:jackson-module-kotlin:2.9.+"
+   implementation 'com.squareup.picasso:picasso:2.71828'
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.bs_tender">

+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

    <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.AppCompat.Light.NoActionBar">
        <activity android:name=".MatchListActivity"
                  android:label="マッチリスト"
                  android:theme="@style/AppTheme">
        </activity>
        <activity android:name=".MatchActivity" />
        <activity android:name=".SplashActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".MainActivity" />
        <activity android:name=".SubActivity" />
+       <activity android:name=".PicassoActivity" />
    </application>

</manifest>

@see