2nd edition

2nd_edition/ActivityLifeCycle/app/build.gradle

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+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion 30
+    defaultConfig {
+        applicationId "com.example.activitylifecycle"
+        minSdkVersion 16
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    buildFeatures {
+        viewBinding true
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.core:core-ktx:1.1.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+
+    // for videoview
+    implementation 'androidx.core:core:1.1.0'
+    implementation 'androidx.media:media:1.1.0'
+}

2nd_edition/ActivityLifeCycle/app/src/androidTest/java/com/example/activitylifecycle/ExampleInstrumentedTest.kt

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+package com.example.activitylifecycle
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.example.activitylifecycle", appContext.packageName)
+    }
+}

2nd_edition/ActivityLifeCycle/app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.activitylifecycle">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+
+    <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>

2nd_edition/ActivityLifeCycle/app/src/main/java/com/example/activitylifecycle/MainActivity.kt

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+package com.example.activitylifecycle
+
+
+import android.net.Uri
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.support.v4.media.session.MediaControllerCompat
+import android.support.v4.media.session.MediaSessionCompat
+import android.support.v4.media.session.PlaybackStateCompat
+import android.widget.MediaController
+import com.example.activitylifecycle.databinding.ActivityMainBinding
+
+class MainActivity : AppCompatActivity() {
+
+    val binding by lazy { ActivityMainBinding.inflate(layoutInflater)}
+
+    val LOG_TAG = "MainActivity"
+    private lateinit var mediaSession: MediaSessionCompat
+
+    private val mediaCallback = object : MediaSessionCompat.Callback() {
+        override fun onPrepare() {
+            super.onPrepare()
+        }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(binding.root)
+
+//        val mediaController = MediaController(this)
+
+        // Create a MediaSessionCompat
+        mediaSession = MediaSessionCompat(this, LOG_TAG).apply {
+
+            setFlags(MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS or
+                    MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS)
+
+            // Do not let MediaButtons restart the player when the app is not visible
+            setMediaButtonReceiver(null)
+
+            // Set an initial PlaybackState with ACTION_PLAY, so media buttons can start the player
+            val stateBuilder = PlaybackStateCompat.Builder()
+                .setActions(PlaybackStateCompat.ACTION_PLAY or PlaybackStateCompat.ACTION_PLAY_PAUSE)
+            setPlaybackState(stateBuilder.build())
+
+            // MySessionCallback has methods that handle callbacks from a media controller
+            setCallback(mediaCallback)
+        }
+
+        // Create a MediaControllerCompat
+        MediaControllerCompat(this, mediaSession).also { mediaController ->
+            MediaControllerCompat.setMediaController(this, mediaController)
+
+            binding.buttonPlay.setOnClickListener {
+                val videoUri = Uri.parse("http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4")
+
+                binding.videoView.setVideoURI(videoUri)
+                binding.videoView.requestFocus()
+                binding.videoView.start()
+            }
+        }
+    }
+
+    override fun onResume() {
+        super.onResume()
+        binding.textView.text = "액티비티가 실행중입니다."
+    }
+}
+
+

2nd_edition/ActivityLifeCycle/app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,43 @@
+<?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">
+
+    <TextView
+        android:id="@+id/textView"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        android:text="상태표시"
+        android:textSize="24sp"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/videoView" />
+
+    <VideoView
+        android:id="@+id/videoView"
+        android:layout_width="351dp"
+        android:layout_height="287dp"
+        android:layout_marginStart="30dp"
+        android:layout_marginLeft="30dp"
+        android:layout_marginTop="30dp"
+        android:layout_marginEnd="30dp"
+        android:layout_marginRight="30dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/buttonPlay"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="24dp"
+        android:text="Play Video"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/textView" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

2nd_edition/ActivityLifeCycle/app/src/main/res/values/strings.xml

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+<resources>
+    <string name="app_name">Activity LifeCycle</string>
+</resources>

2nd_edition/ActivityLifeCycle/app/src/test/java/com/example/activitylifecycle/ExampleUnitTest.kt

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+package com.example.activitylifecycle
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}

2nd_edition/ActivityLifeCycle/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Mon Dec 02 11:35:53 KST 2019
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip

2nd_edition/ActivityLifeCycle/settings.gradle

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+include ':app'
+rootProject.name='Activity LifeCycle'

2nd_edition/Array/.gitignore

@@ -0,0 +1,13 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild