pennya

   fun forTest(list: List<String>) {
        for(item in list) {
            println(item)
        }
        for(i in 0..list.size) {
            println(list[i])
        }
        for(i in list.indices) {
            println(list[i])
        }

pennya

apply plugin: 'java-library'
apply plugin: 'kotlin'

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    runtimeClasspath files(compileKotlin.destinationDir)
}

sourceCompatibility = "1.8"

pennya

    @SuppressLint("WrongConstant")
    fun getKeyHash(): String? {
        try {
            if (Build.VERSION.SDK_INT >= 28) {
                val info: PackageInfo = packageManager.getPackageInfo(packageName, PackageManager.GET_SIGNING_CERTIFICATES)
                val signatures: Array<Signature> = info.signingInfo.apkContentsSigners
                val md: MessageDigest = MessageDigest.getInstance("SHA")
                for (signature in signatures) {
                    md.update(signature.toByteArray())
                    return Base64.encodeToString(md.digest(), Base64.NO_WRAP)

pennya

appbar.addOnOffsetChangedListener(AppBarLayout.OnOffsetChangedListener { appBarLayout, verticalOffset ->
    if(Math.abs(verticalOffset) - appBarLayout.totalScrollRange == 0) {
        // collapse
    } else {
        // expanded
    }
})

pennya

#앱 서명용 인증서 위치 확인

• Windows: C:\Users{사용자 계정 이름}.android\debug.keystore
• OS X, Linux: ~/.android/debug.keystore

#SHA-1 지문 얻기

• Windows keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android

• OS X, Linux

pennya

class DuziPermission(private val context: Context) {

    private lateinit var listener: PermissionListener
    private lateinit var permissions: Array<String>
    private lateinit var rationaleTitle: CharSequence
    private lateinit var rationaleMessage: CharSequence
    private lateinit var denyTitle: CharSequence
    private lateinit var denyMessage: CharSequence
    private var requestedOrientation: Int = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED // 시스템이 화면 모드를 정함

pennya

apply plugin: 'kotlin-kapt'

....

dependencies {
    implementation 'com.github.bumptech.glide:glide:4.8.0'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.8.0'
}

pennya

public class DonutView extends View {

    Context context;
    int value = 0;
    int size;
    int strokeSize;
    int textSize;

    int width;
    int height;

pennya

The issue is resolved by these changes:

Close Android Studio
Go to C:\Users\UserName.android and rename the build-cache folder to buildcache.bak
Go to C:\Users\UserName.AndroidStudio3.2\system and rename these folders

(1) caches to caches.bak
(2) compiler to compiler.bak
(3) compile-server to compile-server.bak
(4) conversion to conversion.bak

pennya

public abstract class SwipeDismissBaseActivity extends AppCompatActivity {
    private static final int SWIPE_MIN_DISTANCE = 120;
    private static final int SWIPE_MAX_OFF_PATH = 250;
    private static final int SWIPE_THRESHOLD_VELOCITY = 200;
    private GestureDetector gestureDetector;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        gestureDetector = new GestureDetector(new SwipeDetector());