Android 4.4 WebView file chooser not opening?

Question

We are creating an app which uses the webview and will access a page where the user needs to upload a file. We are experiencing problems with Android 4.4 where the file choo

Answer 1

Android Kotlin,

MyWebViewChromeClient class:

class MyWebViewChromeClient(private val mContext: MyMainActivity): WebChromeClient() {

    override fun onShowFileChooser(webView: WebView, filePathCallback: ValueCallback>, fileChooserParams: FileChooserParams): Boolean {
        mContext.mUploadMessageArray?.onReceiveValue(null)
        mContext.mUploadMessageArray = filePathCallback

        val contentSelectionIntent = Intent(Intent.ACTION_GET_CONTENT)
        contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE)
        contentSelectionIntent.type = "*/*"
        val intentArray: Array = arrayOfNulls(0)

        val chooserIntent = Intent(Intent.ACTION_CHOOSER)
        chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent)
        chooserIntent.putExtra(Intent.EXTRA_TITLE, "File Chooser")
        chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray)
        mContext.startActivityForResult(chooserIntent, mContext.FILECHOOSER_RESULTCODE)
        return true
    }

MyMainActivity class:

class MyMainActivity : MyBaseActivity() {

    val FILECHOOSER_RESULTCODE = 1001
    var mUploadMessageArray: ValueCallback>? = null

    private lateinit var mWebView: MyWebView
    private lateinit var mContext: Context

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        if (requestCode == FILECHOOSER_RESULTCODE) {
            if (mUploadMessageArray == null) {
                return
            }
            val result = if (intent == null || resultCode != Activity.RESULT_OK) null else data?.data
            result?.let {
                val uriArray: Array = arrayOf(it)
                mUploadMessageArray?.onReceiveValue(uriArray)
                mUploadMessageArray = null
            } ?: kotlin.run {
                mUploadMessageArray?.onReceiveValue(null)
                mUploadMessageArray = null
            }
        }
    }
}