Bad state: Insecure HTTP is not allowed by platform:

问题

I'm having the following problem: E/flutter ( 7144): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: Bad state: Insecure HTTP is not allowed by platform: http://myIPv4:PORT/PATH.

And this is the backend that I can access:

I already allowing the access by cors, but not even this help me. I already tried to use the http://localhost:port/path and http://myIP:port/path but doesn't worked!

But if I try access directly by browser so work.

回答1:

1. Navigate to your project.
2. Go to yourapp\android\app\src\debug\AndroidManifest.xml.
3. Add this line.

<application android:usesCleartextTraffic="true">
</application>

For further details, follow this link.

回答2:

For Android:

This behavior may be omitted following migration guide: https://flutter.dev/docs/release/breaking-changes/network-policy-ios-android.

or... Just add in android/app/src/main/AndroidManifest.xml:

android:usesCleartextTraffic="true" to <application /> also dont forget to take INTERNET PERMISSION:

<uses-permission android:name="android.permission.INTERNET" /> <!-- This Line -->

<application
        android:name="io.flutter.app.FlutterApplication"
        android:label="receipt"
        android:usesCleartextTraffic="true" <!-- This Line -->
        android:icon="@mipmap/ic_launcher">

For iOS:

Allow insecure/HTTP requests globally across your application on iOS, you can add this to your ios/Runner/info.plist under the main dictionary definition:

<key>NSAppTransportSecurity</key>
<dict>
        <key>NSAllowsArbitraryLoads</key>
        <true/>
</dict>

Be warned that you will need to have an explanation for Apple's review team when enabling this, otherwise your app will get rejected on submission.

Thank you.

回答3:

This problem is solved here.

https://flutter.dev/docs/release/breaking-changes/network-policy-ios-android

You just need to change the HTTP to HTTPS. Like this

Response response = await get('https://worldtimeapi.org/api/timezone/Africa/Nairobi');

回答4:

I solved it by following this step:

1. android/app/src/main/AndroidManifest.xml then write

   <application
   android:usesCleartextTraffic="true"
   android:label="laundry"
   android:icon="@mipmap/ic_launcher">
   <uses-library
    android:name="org.apache.http.legacy"
    android:required="false" />  </application>
   

来源：https://stackoverflow.com/questions/64197752/bad-state-insecure-http-is-not-allowed-by-platform