解决Android10 无法下载安装apk的问题 open failed: EACCES (Permission denied)_permitdeny下载

背景

Android 10 华为P30 pro手机
从服务器下载apk安装包的时候报错open failed: EACCES (Permission denied)

解决方法

注意这句话: android:requestLegacyExternalStorage="true"
 <application
        android:name=".MyApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:networkSecurityConfig="@xml/network_security_config"
        android:requestLegacyExternalStorage="true"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
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此时可以正常下载文件之后,即可安装:

  <!--安装下载好的安装包-->
    <uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
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 // 获取文件下载路径
                    val apkFile = File(filePath)
                    val intent = Intent(Intent.ACTION_VIEW)
                    intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                        intent.flags = Intent.FLAG_GRANT_READ_URI_PERMISSION
                        val contentUri: Uri = FileProvider.getUriForFile(
                            this@MainActivity,
                            "com.ly.checkticket4hengqin",
                            apkFile
                        )
                        intent.setDataAndType(contentUri, "application/vnd.android.package-archive")
                    } else {
                        intent.setDataAndType(
                            Uri.fromFile(apkFile),
                            "application/vnd.android.package-archive"
                        )
                    }
                    startActivity(intent)
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最后manifest.xml里面也要对应起来:

        <provider
            android:name="androidx.core.content.FileProvider"
            android:authorities="com.ly.checkticket4hengqin"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/provider_paths" />
        </provider>
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打完收工。