xref: /frameworks/base/docs/html/guide/topics/manifest/grant-uri-permission-element.jd

page.title=<grant-uri-permission>
@jd:body

<dl class="xml">
<dt>syntax:</dt>
<dd><pre class="stx">&lt;grant-uri-permission android:<a href="#path">path</a>="<i>string</i>"
                      android:<a href="#path">pathPattern</a>="<i>string</i>"
                      android:<a href="#path">pathPrefix</a>="<i>string</i>" /&gt;</pre></dd>

<dt>contained in:</dt>
<dd><code><a href="{@docRoot}guide/topics/manifest/provider-element.html">&lt;provider&gt;</a></code></dd>

<dt>description:</dt>
<dd>Specifies which data subsets of the parent content provider permission
can be granted for.  Data subsets are indicated by the path part of a 
{@code content:} URI.  (The authority part of the URI identifies the
content provider.)  
Granting permission is a way of enabling clients of the provider that don't 
normally have permission to access its data to overcome that restriction on 
a one-time basis.

<p> 
If a content provider's <code><a href="{@docRoot}guide/topics/manifest/provider-element.html#gprmns">grantUriPermissions</a></code> 
attribute is "{@code true}", permission can be granted for any the data under 
the provider's purview.  However, if that attribute is "{@code false}", permission 
can be granted only to data subsets that are specified by this element.  
A provider can contain any number of {@code &lt;grant-uri-permission&gt;} elements.  
Each one can specify only one path (only one of the three possible attributes).
</p>

<p>
For information on how permission is granted, see the 
<code><a href="{@docRoot}guide/topics/manifest/intent-filter-element.html">&lt;intent-filter&gt;</a></code> element's
<code><a href="{@docRoot}guide/topics/manifest/provider-element.html#gprmsn">grantUriPermissions</a></code> attribute.
</p></dd>

<dt>attributes:</dt>
<dd><dl class="attr">
<dt><a name="path"></a>{@code android:path}
<br/>{@code android:pathPrefix}
<br/>{@code android:pathPattern}</dt>
<dd>A path identifying the data subset or subsets that permission can be 
granted for.  The {@code path} attribute specifies a complete path; 
permission can be granted only to the particular data subset identified 
by that path.  
The {@code pathPrefix} attribute specifies the initial part of a path; 
permission can be granted to all data subsets with paths that share that 
initial part.   
The {@code pathPattern} attribute specifies a complete path, but one 
that can contain the following wildcards:

<ul>
<li>An asterisk ('{@code *}') matches a sequence of 0 to many occurrences of
the immediately preceding character.</li>

<li><p>A period followed by an asterisk ("{@code .*}") matches any sequence of 
0 to many characters.</p></li>
</ul>

<p>
Because '{@code \}' is used as an escape character when the string is read 
from XML (before it is parsed as a pattern), you will need to double-escape:  
For example, a literal '{@code *}' would be written as "{@code \\*}" and a 
literal '{@code \}' would be written as "{@code \\\\}".  This is basically 
the same as what you would need to write if constructing the string in Java code.
</p>

<p>
For more information on these types of patterns, see the descriptions of 
{@link android.os.PatternMatcher#PATTERN_LITERAL},
{@link android.os.PatternMatcher#PATTERN_PREFIX}, and
{@link android.os.PatternMatcher#PATTERN_SIMPLE_GLOB} in the
{@link android.os.PatternMatcher} class.
</p></dd>
</dl></dd>

<dt>see also:</dt>
<dd>the 
<code><a href="{@docRoot}guide/topics/manifest/provider-element.html#gprmns">grantUriPermissions</a></code>
attribute of the 
<code><a href="{@docRoot}guide/topics/manifest/provider-element.html">&lt;provider&gt;</a></code> 
element</dd>


</dl>