# URLUtil
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
# URLUtil
*** ** * ** ***
Kotlin\|[Java](https://developer.android.com/reference/android/webkit/URLUtil "View this page in Java")
```
class URLUtil
```
|---|--------------------------------------------------------------------------------------------------|
| [kotlin.Any](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/index.html) ||
| ↳ | [android.webkit.URLUtil](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#) |
## Summary
| Public constructors ||
|-------------------------------------------------------------------------------------------------------|---|
| [URLUtil](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#URLUtil())`()`
|
| Public methods ||
|------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| static[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)! | [composeSearchUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#composeSearchUrl(kotlin.String,%20kotlin.String,%20kotlin.String))`(`inQuery:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`, `template:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`, `queryPlaceHolder:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)` Inserts the`inQuery`in the`template`after URL-encoding it. |
| static[ByteArray](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-byte-array/index.html)! | [decode](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#decode(kotlin.ByteArray))`(`url:` `[ByteArray](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-byte-array/index.html)!`)`
|
| static[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)! | [guessFileName](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#guessFileName(kotlin.String,%20kotlin.String,%20kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`, `contentDisposition:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)?`, `mimeType:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)?`)` Guesses canonical filename that a download would have, using the URL and contentDisposition. |
| static[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)! | [guessUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#guessUrl(kotlin.String))`(`inUrl:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)` Cleans up (if possible) user-entered web addresses |
| static[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isAboutUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#isAboutUrl(kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
|
| static[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isAssetUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#isAssetUrl(kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
|
| static[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isContentUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#isContentUrl(kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
|
| static[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isCookielessProxyUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#isCookielessProxyUrl(kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
|
| static[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isDataUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#isDataUrl(kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
|
| static[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isFileUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#isFileUrl(kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
|
| static[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isHttpUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#isHttpUrl(kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
|
| static[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isHttpsUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#isHttpsUrl(kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
|
| static[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isJavaScriptUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#isJavaScriptUrl(kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
|
| static[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isNetworkUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#isNetworkUrl(kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
|
| static[Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [isValidUrl](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#isValidUrl(kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)`
|
| static[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)! | [stripAnchor](https://developer.android.com/reference/kotlin/android/webkit/URLUtil#stripAnchor(kotlin.String))`(`url:` `[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!`)` Strips the url of the anchor. |
## Public constructors
### URLUtil
```
URLUtil()
```
## Public methods
### composeSearchUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun composeSearchUrl(
inQuery: String!,
template: String!,
queryPlaceHolder: String!
): String!
```
Inserts the`inQuery`in the`template`after URL-encoding it. The encoded query will replace the`queryPlaceHolder`.
### decode
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun decode(url: ByteArray!): ByteArray!
```
### guessFileName
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun guessFileName(
url: String!,
contentDisposition: String?,
mimeType: String?
): String!
```
Guesses canonical filename that a download would have, using the URL and contentDisposition.
File extension, if not defined, is added based on the mimetype.
The`contentDisposition`argument will be treated differently depending on targetSdkVersion.
- For targetSDK versions \<`VANILLA_ICE_CREAM`it will be parsed based on RFC 2616.
- For targetSDK versions \>=`VANILLA_ICE_CREAM`it will be parsed based on RFC 6266.
In practice, this means that from`VANILLA_ICE_CREAM`, this method will be able to parse`filename*`directives in the`contentDisposition`string.
The function also changed in the following ways in`VANILLA_ICE_CREAM`:
- If the suggested file type extension doesn't match the passed`mimeType`, the method will append the appropriate extension instead of replacing the current extension.
- If the suggested file name contains a path separator (`"/"`), the method will replace this with the underscore character (`"_"`) instead of splitting the result and only using the last part.
| Parameters ||
|----------------------|----------------------------------------------------------------------------------------------------------------------------|
| `url` | [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)!:Url to the content |
| `contentDisposition` | [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)?:Content-Disposition HTTP header or`null` |
| `mimeType` | [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)?:Mime-type of the content or`null` |
| Return ||
|-----------------------------------------------------------------------------------|--------------------|
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)! | suggested filename |
### guessUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun guessUrl(inUrl: String!): String!
```
Cleans up (if possible) user-entered web addresses
### isAboutUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun isAboutUrl(url: String!): Boolean
```
| Return ||
|------------------------------------------------------------------------------------|------------------------------------|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `true`if the url is an about: url. |
### isAssetUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun isAssetUrl(url: String!): Boolean
```
| Return ||
|------------------------------------------------------------------------------------|------------------------------------|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `true`if the url is an asset file. |
### isContentUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun isContentUrl(url: String!): Boolean
```
| Return ||
|------------------------------------------------------------------------------------|-------------------------------------|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `true`if the url is a content: url. |
### isCookielessProxyUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
Deprecated in[API level 15](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun isCookielessProxyUrl(url: String!): Boolean
```
**Deprecated:** *Cookieless proxy is no longer supported.*
| Return ||
|------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `true`if the url is a proxy url to allow cookieless network requests from a file url. |
### isDataUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun isDataUrl(url: String!): Boolean
```
| Return ||
|------------------------------------------------------------------------------------|----------------------------------|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `true`if the url is a data: url. |
### isFileUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun isFileUrl(url: String!): Boolean
```
| Return ||
|------------------------------------------------------------------------------------|-----------------------------------|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `true`if the url is a local file. |
### isHttpUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun isHttpUrl(url: String!): Boolean
```
| Return ||
|------------------------------------------------------------------------------------|-----------------------------------|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `true`if the url is an http: url. |
### isHttpsUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun isHttpsUrl(url: String!): Boolean
```
| Return ||
|------------------------------------------------------------------------------------|------------------------------------|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `true`if the url is an https: url. |
### isJavaScriptUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun isJavaScriptUrl(url: String!): Boolean
```
| Return ||
|------------------------------------------------------------------------------------|----------------------------------------|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `true`if the url is a javascript: url. |
### isNetworkUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun isNetworkUrl(url: String!): Boolean
```
| Return ||
|------------------------------------------------------------------------------------|------------------------------------|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `true`if the url is a network url. |
### isValidUrl
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun isValidUrl(url: String!): Boolean
```
| Return ||
|------------------------------------------------------------------------------------|----------------------------|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `true`if the url is valid. |
### stripAnchor
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static fun stripAnchor(url: String!): String!
```
Strips the url of the anchor.