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// Copyright 2012 Google Inc. All Rights Reserved.
package com.google.android.canvas.data.util;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent.ShortcutIconResource;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.net.Uri;
/**
* Utilities for working with URIs.
*/
public final class UriUtils {
private static final String SCHEME_SHORTCUT_ICON_RESOURCE = "shortcut.icon.resource";
private static final String SCHEME_DELIMITER = "://";
private static final String URI_PATH_DELIMITER = "/";
private static final String URI_PACKAGE_DELIMITER = ":";
private static final String HTTP_PREFIX = "http";
private static final String HTTPS_PREFIX = "https";
/**
* Non instantiable.
*/
private UriUtils() {}
/**
* get resource uri representation for a resource of a package
*/
public static String getAndroidResourceUri(Context context, int resourceId) {
return getAndroidResourceUri(context.getResources(), resourceId);
}
/**
* get resource uri representation for a resource
*/
public static String getAndroidResourceUri(Resources resources, int resourceId) {
return ContentResolver.SCHEME_ANDROID_RESOURCE
+ SCHEME_DELIMITER + resources.getResourceName(resourceId)
.replace(URI_PACKAGE_DELIMITER, URI_PATH_DELIMITER);
}
/**
* load drawable from resource
* TODO: move to a separate class to handle bitmap and drawables
*/
public static Drawable getDrawable(Context context, ShortcutIconResource r)
throws NameNotFoundException {
Resources resources = context.getPackageManager().getResourcesForApplication(r.packageName);
if (resources == null) {
return null;
}
final int id = resources.getIdentifier(r.resourceName, null, null);
return resources.getDrawable(id);
}
/**
* Gets a URI with short cut icon scheme.
*/
public static Uri getShortcutIconResourceUri(ShortcutIconResource iconResource) {
return Uri.parse(SCHEME_SHORTCUT_ICON_RESOURCE + SCHEME_DELIMITER + iconResource.packageName
+ URI_PATH_DELIMITER
+ iconResource.resourceName.replace(URI_PACKAGE_DELIMITER, URI_PATH_DELIMITER));
}
/**
* Gets a URI with scheme = {@link ContentResolver#SCHEME_ANDROID_RESOURCE}.
*/
public static Uri getAndroidResourceUri(String resourceName) {
Uri uri = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + SCHEME_DELIMITER
+ resourceName.replace(URI_PACKAGE_DELIMITER, URI_PATH_DELIMITER));
return uri;
}
/**
* Checks if the URI refers to an Android resource.
*/
public static boolean isAndroidResourceUri(Uri uri) {
return ContentResolver.SCHEME_ANDROID_RESOURCE.equals(uri.getScheme());
}
/**
* Checks if the URI refers to an shortcut icon resource.
*/
public static boolean isShortcutIconResourceUri(Uri uri) {
return SCHEME_SHORTCUT_ICON_RESOURCE.equals(uri.getScheme());
}
/**
* Creates a shortcut icon resource object from an Android resource URI.
*/
public static ShortcutIconResource getIconResource(Uri uri) {
if(isAndroidResourceUri(uri)) {
ShortcutIconResource iconResource = new ShortcutIconResource();
iconResource.packageName = uri.getAuthority();
// Trim off the scheme + 3 extra for "://", then replace the first "/" with a ":"
iconResource.resourceName = uri.toString().substring(
ContentResolver.SCHEME_ANDROID_RESOURCE.length() + SCHEME_DELIMITER.length())
.replaceFirst(URI_PATH_DELIMITER, URI_PACKAGE_DELIMITER);
return iconResource;
} else if(isShortcutIconResourceUri(uri)) {
ShortcutIconResource iconResource = new ShortcutIconResource();
iconResource.packageName = uri.getAuthority();
iconResource.resourceName = uri.toString().substring(
SCHEME_SHORTCUT_ICON_RESOURCE.length() + SCHEME_DELIMITER.length()
+ iconResource.packageName.length() + URI_PATH_DELIMITER.length())
.replaceFirst(URI_PATH_DELIMITER, URI_PACKAGE_DELIMITER);
return iconResource;
} else {
throw new IllegalArgumentException("Invalid resource URI. " + uri);
}
}
/**
* Returns {@code true} if this is a web URI.
*/
public static boolean isWebUri(Uri resourceUri) {
String scheme = resourceUri.getScheme().toLowerCase();
return HTTP_PREFIX.equals(scheme) || HTTPS_PREFIX.equals(scheme);
}
}
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