Flutter and Google Translate API

Communication is a miracle of translation…

Fluttering into the Google World over some time and decided to go for Translation……

Begin…

For the translation part, we need to introduce Google Cloud Translation API.

As per the docs, 

The Translation API translates input into any supported language using state-of-the-art Neural Machine Translation. 

What do we need : 

1. Google Project in the Google Cloud Console.
2. Enable Google Cloud Translation API.

3. Create a credentials key for your account..

Navigate to the API Manager section of your project dashboard,

In the drop down menu, select API key:

Send requests to Cloud Translation API…

1. Need to create a URI based on the API key (from above)

https://translation.googleapis.com/language/translate/v2?target={YOUR_LANGUAGE}&key=${API_KEY}&q=${TEXT}

Parameters :

1. target={YOUR_LANGUAGE}

Replace this to the language, you want for your text. e.g If the output required is in Spanish, then target=es

2. key=${API_KEY}

Replace this to your api key from above steps. e.g If key is 1234567, then key=1234567

3. q=${TEXT}

Replace this to your text you want to be translated. e.g Say “hello”, then q=hello

No headers etc required. Just the above params.

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Response….

Your response should look like the following:

{  "data": {    "translations": [      {        "translatedText": "TRANSLATED TEXT",        "detectedSourceLanguage": "DETECTED SOURCE LANGUAGE"      }    ]  }}

Note : TRANSLATED TEXT and DETECTED SOURCE LANGUAGE

will be replaced by actual response from API…

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Enter Flutter…

For constructing the url in Flutter, I would recommend using Uri class.

There is an inbuilt option in Flutter under dart:core as Uri.https

Creates a new https URI from authority, path and query.

This constructor is the same as Uri.http except for the scheme which is set to https.

Uri.https(
          String authority,  
          String unencodedPath, 
          [ Map<String, String> queryParameters ]
)

where authority is e.g stackoverflow.com and not https://stackoverflow.com

where unencodedPath is /questions/sdsdssa

where queryParameters are : in our case the 3 params above.