小编A M*_*aja的帖子

我收到以下运行时错误:

 checkParameterIsNotNull, parameter oneClickTokens
    at com.info.app.fragments.Fragment_Payment_Profile$fetchMerchantHashes$1.onPostExecute(Fragment_Payment_Profile.kt:0)
    at com.info.app.fragments.Fragment_Payment_Profile$fetchMerchantHashes$1.onPostExecute(Fragment_Payment_Profile.kt:1543)

这是我的代码:

 private fun fetchMerchantHashes(intent: Intent) {
    // now make the api call.
    val postParams = "merchant_key=$key&user_credentials=$var1"
    val baseActivityIntent = intent
    object : AsyncTask<Void, Void, HashMap<String, String>>() {

        override fun doInBackground(vararg params: Void): HashMap<String, String>? {
                ...
        }

        override fun onPostExecute(oneClickTokens: HashMap<String, String>) {
            super.onPostExecute(oneClickTokens)
            ...

        }
    }.execute()
}

似乎函数调用似乎无效.但是,我不知道如何解决这个问题.Kotlin有什么具体的我错过了吗？

如何在 kotlin android 中使用带有 responseInputStream.read 的 while 循环

这里添加了 responseInputStream read while loop .kt

                val responseInputStream = conn.inputStream
                val responseStringBuffer = StringBuffer()
                val byteContainer = ByteArray(1024)
                var i: Int
                while ((i = responseInputStream.read(byteContainer)) != -1) {
                    responseStringBuffer.append(String(byteContainer, 0, i))
                }
                Log.w("TAG", "res :" + responseStringBuffer.toString())

AndroidRuntime: FATAL EXCEPTION: main
  Process: com.info.app, PID: 24503
  java.lang.RuntimeException: Unable to get provider com.google.firebase.provider.FirebaseInitProvider: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.info.app-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.info.app-1, /vendor/lib, /system/lib]]
      at android.app.ActivityThread.installProvider(ActivityThread.java:5236)
      at android.app.ActivityThread.installContentProviders(ActivityThread.java:4827)
      at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4710)
      at android.app.ActivityThread.access$1600(ActivityThread.java:174)
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1367)
      at android.os.Handler.dispatchMessage(Handler.java:102)
      at android.os.Looper.loop(Looper.java:146)
      at android.app.ActivityThread.main(ActivityThread.java:5593)
      at java.lang.reflect.Method.invokeNative(Native Method)
      at java.lang.reflect.Method.invoke(Method.java:515)
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
      at dalvik.system.NativeStart.main(Native Method)
   Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.info.app-1.apk"],nativeLibraryDirectories=[/data/app-lib/com.info.app-1, /vendor/lib, /system/lib]]
      at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:67)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
      at android.app.ActivityThread.installProvider(ActivityThread.java:5221)
      at android.app.ActivityThread.installContentProviders(ActivityThread.java:4827) 
      at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4710) …