如何在android中下载和安装apk更新？

Question

如何在Android编程中下载和安装apk文件。我需要从包含apk file...The的URL下载和安装新的更新，通常的步骤是检查是否有新版本，然后下载并安装它。

这是我现在使用的代码：

    val extStorageDirectory = Environment.getExternalStorageDirectory().toString()
        val folder = File(extStorageDirectory)
        Log.e("extStorageDirectory", extStorageDirectory)
        folder.mkdir()
        val file = File(folder, "AppName." + "apk")
        try {
            file.createNewFile()
            /**
             * APKURL is your apk file url(server url)
             */
            DownloadFile(apkLink, file)
        } catch (e1: IOException) {
//            e1.printStackTrace()
            Log.e("e1", e1.toString())
        }


    private fun DownloadFile(fileURL: String, directory: File) {

        try {
            val f = FileOutputStream(directory)
            val u = URL(fileURL)
            val c = u.openConnection() as HttpURLConnection
            c.requestMethod = "GET"
            //c.setDoOutput(true);
            c.connect()
            val `in` = c.inputStream
            val buffer = ByteArray(1024)
            var len1 = 0
            while (`in`.read(buffer).also { len1 = it } > 0) {
                f.write(buffer, 0, len1)
            }
            f.close()

            val intent = Intent(Intent.ACTION_VIEW)
            intent.setDataAndType(
                Uri.fromFile(
                    File(
                        Environment.getExternalStorageDirectory()
                            .toString()  + "AppName.apk"
                    )
                ), "application/vnd.android.package-archive"
            )
            startActivity(intent)

        } catch (e: Exception) {
            println("exception in DownloadFile: --------$e")
            e.printStackTrace()
            Log.e("exception in DownloadFile", e.toString())
        }
    }

我得到了这个错误: java.io.IOException:不允许的操作

Answer 1

在您的设备中设置->安全->未知源->允许安装来自未知源的应用程序。因为您不使用CHplay，所以必须接受其他来源的apk。