{"record":{"id":"447d517e7cbffea8","repo":"apache/cordova-android","slug":"one-of-the-following-attributes-are-set-but-missin","errorCode":null,"errorMessage":"One of the following attributes are set but missing the other for the density type: ${errorMissingAttributes.join(', ')}. Please ensure that all require attributes are defined. For the following icons with the density of: ${errorLegacyIconNeeded.join(', ')}, adaptive foreground with a defined color or vector can not be used as a standard fallback icon for older Android devices. To support older Android environments, please provide a value for the src attribute.","messagePattern":"One of the following attributes are set but missing the other for the density type: (.+?)\\. Please ensure that all require attributes are defined\\. For the following icons with the density of: (.+?), adaptive foreground with a defined color or vector can not be used as a standard fallback icon for older Android devices\\. To support older Android environments, please provide a value for the src attribute\\.","errorType":"validation","errorClass":"CordovaError","httpStatus":null,"severity":"error","filePath":"lib/prepare.js","lineNumber":701,"sourceCode":" ) {\n errorLegacyIconNeeded.push(icon.density ? icon.density : 'size=' + (icon.height || icon.width));\n } else if (!icon.src) {\n icons[key].src = icon.foreground;\n }\n }\n });\n\n const errorMessage = [];\n if (errorMissingAttributes.length > 0) {\n errorMessage.push('One of the following attributes are set but missing the other for the density type: ' + errorMissingAttributes.join(', ') + '. Please ensure that all require attributes are defined.');\n }\n\n if (errorLegacyIconNeeded.length > 0) {\n errorMessage.push('For the following icons with the density of: ' + errorLegacyIconNeeded.join(', ') + ', adaptive foreground with a defined color or vector can not be used as a standard fallback icon for older Android devices. To support older Android environments, please provide a value for the src attribute.');\n }\n\n if (errorMessage.length > 0) {\n throw new CordovaError(errorMessage.join(' '));\n }\n\n let resourceMap = Object.assign(\n {},\n mapImageResources(cordovaProject.root, platformResourcesDir, 'mipmap', 'ic_launcher.png'),\n mapImageResources(cordovaProject.root, platformResourcesDir, 'mipmap', 'ic_launcher_foreground.png'),\n mapImageResources(cordovaProject.root, platformResourcesDir, 'mipmap', 'ic_launcher_background.png'),\n mapImageResources(cordovaProject.root, platformResourcesDir, 'mipmap', 'ic_launcher_monochrome.png'),\n mapImageResources(cordovaProject.root, platformResourcesDir, 'mipmap', 'ic_launcher_foreground.xml'),\n mapImageResources(cordovaProject.root, platformResourcesDir, 'mipmap', 'ic_launcher_background.xml'),\n mapImageResources(cordovaProject.root, platformResourcesDir, 'mipmap', 'ic_launcher_monochrome.xml'),\n mapImageResources(cordovaProject.root, platformResourcesDir, 'mipmap', 'ic_launcher.xml')\n );\n\n const preparedIcons = prepareIcons(icons);\n\n if (hasAdaptive) {\n resourceMap = updateIconResourceForAdaptive(preparedIcons, resourceMap, platformResourcesDir);","sourceCodeStart":683,"sourceCodeEnd":719,"githubUrl":"https://github.com/apache/cordova-android/blob/7c1e190064e349ffa4bbc6ac37b77cd773e4dbd3/lib/prepare.js#L683-L719","documentation":"During `cordova prepare android`, updateIcons validates every in config.xml for the android platform and throws this combined CordovaError when (a) an icon sets background without foreground or vice versa (or sets neither plus no src), and/or (b) an adaptive icon's foreground is a @color reference or vector .xml while no legacy src is provided. Adaptive (API 26+) icons need both layers, and pre-API-26 devices need a raster src fallback.","triggerScenarios":"Running `cordova build android` / `cordova prepare` with config.xml like (no foreground), or where icon.xml is a vector and there is no src=\"...png\" icon for that density. The first loop in updateIcons collects errorMissingAttributes and errorLegacyIconNeeded and throws at prepare time.","commonSituations":"Copying adaptive-icon config from a blog post but dropping the src fallback; migrating an app that only defines foreground+background expecting Android to synthesize the legacy icon; using @color backgrounds introduced for adaptive icons on an old template; density attributes (ldpi..xxxhdpi) partially updated.","solutions":["For every that declares background or foreground, declare BOTH: ","For adaptive icons whose foreground is @color/... or a vector .xml, add a legacy raster fallback on the same element: src=\"res/icon-xxxhdpi.png\"","Simplest repair: use plain raster icons only — — dropping background/foreground entirely","Re-run `cordova prepare android` to confirm the icons pass validation before building"],"exampleFix":"\n\n \n \n\n\n\n\n \n","handlingStrategy":"validation","validationCode":"// validate config.xml icons before prepare\nconst icons = parseConfigIcons(); // [{src, background, foreground, density}]\nconst bad = icons.filter(i =>\n (!!i.background !== !!i.foreground) ||\n (!i.background && !i.foreground && !i.src) ||\n (i.foreground && !i.src && (/^@color/.test(i.foreground) || i.foreground.endsWith('.xml')))\n);\nif (bad.length) throw new Error('icon config invalid: ' + bad.map(i => i.density).join(', '));","typeGuard":null,"tryCatchPattern":"try { await cordova.prepare('android'); } catch (e) {\n if (/adaptive foreground/.test(e.message) || /missing the other for the density type/.test(e.message)) { /* fix elements listed in the message, then re-prepare */ }\n}","preventionTips":["For adaptive icons always set background AND foreground AND a raster src fallback","Provide plain PNG icons per density as a safe baseline","Run `cordova prepare android` in CI to catch icon config errors early"],"tags":["cordova","cordova-android","config-xml","icons","adaptive-icons","prepare"],"backgroundTag":"config-validation-failed","analyzedSha":"7c1e190064e349ffa4bbc6ac37b77cd773e4dbd3","analyzedAt":"2026-08-22T04:57:58.868Z","schemaVersion":2},"datasetVersion":"2026-08-22T09:17:25.309Z"}