dokinkon

public class PlayServicesUtils {
    public static boolean checkGooglePlayServices(final Activity activity) {
        final int googlePlayServicesCheck = GooglePlayServicesUtil.isGooglePlayServicesAvailable(activity);
        switch (googlePlayServicesCheck) {
            case ConnectionResult.SUCCESS:
                return true;
            case ConnectionResult.SERVICE_DISABLED:
            case ConnectionResult.SERVICE_INVALID:
            case ConnectionResult.SERVICE_MISSING:
            case ConnectionResult.SERVICE_VERSION_UPDATE_REQUIRED:

dokinkon

public class RxBusExample {
    RxBus bus = RxBus.getInstance();
    bus.post();
}

dokinkon

inline fun <reified T> createWebService(okHttpClient: OkHttpClient, url: String): T {
  val retrofit = Retrofit.Builder()
    .baseUrl(url)
    .client(okHttpClient)
    .addConverterFactory(ScalarsConverterFactory.create()) // <--- 避免產生雙引號在multipart-formdata的參數中
    .addConverterFactory(GsonConverterFactory.create()) // <-- ScalarsConverterFactory要放在GsonConverterFactory之前
    .addCallAdapterFactory(RxJava2CallAdapterFactory.create()).build()
  return retrofit.create(T::class.java)
}

dokinkon

android {
    compileSdkVersion 28
    
    ...

    /**
     * 解決：
     * Kotlin: Calls to static methods in Java interfaces are prohibited in JVM target 1.6. Recompile with '-jvm-target 1.8'
     * 參考：
     * https://stackoverflow.com/a/52561908/307442

dokinkon

fun exampleOfAudioFocus() {
  // AUDIOFOCUS_GAIN : 嘗試取得非特定時間長度的Audio focus
  // AUDIOFOCUS_GAIN_TRANSIENT, 取得一個短時間的focus，例如導航的提示音
  // AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK, 取得一個短時間的focus，但是可以跟其他App播放的聲音一起播放，例如導航的提示音，蓋在背景音樂上
  // AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE, 預期取得一個獨佔的focus，佔有這個focus的期間，其他App應該安靜，例如語音筆記或是語音辨識
  
  // 要播放聲音前，先取得Audio focus
  // Audio focus改變時，會透過Listener通知
  val gain = AudioManager.AUDIOFOCUS_GAIN
  val request = AudioFocusRequest.Builder(gain)

dokinkon

/**
 * Wraps the parameters of onActivityResult
 *
 * @property resultCode the result code returned from the activity.
 * @property data the optional intent returned from the activity.
 * @since 0.0.3
 */
data class ActivityResult(
    val requestCode: Int,
    val resultCode: Int,