{"id":400,"date":"2015-03-25T20:55:09","date_gmt":"2015-03-25T20:55:09","guid":{"rendered":"http:\/\/installingcats.com\/?p=400"},"modified":"2015-03-25T20:55:09","modified_gmt":"2015-03-25T20:55:09","slug":"android-studio-failed-sync-gradle-project-fix","status":"publish","type":"post","link":"https:\/\/installingcats.com\/2015\/03\/25\/android-studio-failed-sync-gradle-project-fix\/","title":{"rendered":"Android Studio &#8211; Failed to Sync Gradle project &#8211; Fix"},"content":{"rendered":"<p><strong>Matching SDK versions\u00a0identified in build.gradle <em>(Module: app)<\/em> with the SDK versions you have installed via SDK Manager, then &#8220;Sync Now&#8221;, will fix\u00a0most Android Studio build errors.<\/strong><\/p>\n<p>Common Android Studio build errors:<\/p>\n<ul>\n<li>Failed to Sync Gradle project<\/li>\n<li>Failed to find target android-21<\/li>\n<li>Install missing platform(s) and sync project<\/li>\n<\/ul>\n<p>If you&#8217;re building \/ running someone else&#8217;s project that you&#8217;ve cloned from Github likely you&#8217;ll run into build errors in Android Studio.<\/p>\n<p>Most Android Studio project build errors can be fixed in one file: \/project\/app\/build.gradle<\/p>\n<p>There are multiple Gradle build files, frustratingly named build.gradle. \u00a0You want the build.gradle <strong>(Module: app)<\/strong> Gradle file.<\/p>\n<p><a href=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/android-studio-build-gradle-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-406\" src=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/android-studio-build-gradle-1-300x280.png\" alt=\"android-studio-build-gradle\" width=\"300\" height=\"280\" \/><\/a><\/p>\n<p>Here&#8217;s a typical Gradle build.gradle file<\/p>\n<pre>android {\n compileSdkVersion 21\n buildToolsVersion \"21.1.2\"\n\n defaultConfig {\n applicationId \"com.domain.appname\"\n minSdkVersion 18\n targetSdkVersion 21\n versionCode 1\n versionName \"1.0\"\n }\n buildTypes {\n release {\n minifyEnabled false\n proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'\n }\n }\n}\n\ndependencies {\n compile fileTree(dir: 'libs', include: ['*.jar'])\n compile 'com.android.support:appcompat-v7:21.0.3'\n}\n\n<\/pre>\n<p>Starting from\u00a0the top of build.gradle file and moving down,<\/p>\n<ul>\n<li><strong>compileSdkVersion<\/strong>\n<ul>\n<li>This number should not be higher than the highest SDK version you have installed via SDK Manager. \u00a0You can scroll through SDK Manager looking for <strong>SDK Platform<\/strong> entries, checking the <strong>API #<\/strong> (<strong>18<\/strong> in the screenshot) and the <strong>Status &#8211; Installed<\/strong>:<\/li>\n<li><a href=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/android-sdk-version-installed-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-402\" src=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/android-sdk-version-installed-1-1024x344.png\" alt=\"android-sdk-version-installed\" width=\"665\" height=\"223\" srcset=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/android-sdk-version-installed-1-1024x344.png 1024w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/android-sdk-version-installed-1-300x101.png 300w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/android-sdk-version-installed-1-768x258.png 768w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/android-sdk-version-installed-1.png 1398w\" sizes=\"(max-width: 665px) 100vw, 665px\" \/><\/a><\/li>\n<\/ul>\n<\/li>\n<li><strong>buildToolsVersion<\/strong>\n<ul>\n<li>This line in your build.gradle should be set to the\u00a0<strong><em>latest<\/em><\/strong> Android SDK build-tools version you have installed, <strong><em>not<\/em><\/strong> a revision\/version that matches your target SDK. \u00a0Again, the build tools version # is not related to your SDK version #. \u00a0In general you want to install and use the latest build tools version.<\/li>\n<li>Visible in SDK Manager here:<\/li>\n<li><a href=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/android-sdk-build-tools-version-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-401\" src=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/android-sdk-build-tools-version-1-1024x337.png\" alt=\"android-sdk-build-tools-version\" width=\"665\" height=\"218\" \/><\/a><\/li>\n<\/ul>\n<\/li>\n<li><strong>targetSdkVersion<\/strong>\n<ul>\n<li>This should generally be the same as your compileSdkVersion<\/li>\n<\/ul>\n<\/li>\n<li><strong>dependencies<\/strong>\n<ul>\n<li>Here is where support libraries are identified \/ referenced.<\/li>\n<li>Note: If you don&#8217;t specifically need libraries from the support library, such as Support FragmentActivity, <strong>remove the reference<\/strong>! Comment out (double forward slash \/\/) these libraries or\u00a0delete the line entirely.<\/li>\n<li>Example:\n<pre>compile 'com.android.support:appcompat-v7:21.0.3'<\/pre>\n<\/li>\n<li>A version # suffix is used when identifying the support library, which comes after the colon (21.0.3 in above\u00a0example). \u00a0This specifies the <strong>version of the support library, <\/strong><em>not<\/em> your SDK version. \u00a0Revisions of the support library are <a href=\"http:\/\/developer.android.com\/tools\/support-library\/index.html\">listed here<\/a>. \u00a0Generally you&#8217;ll want to use the latest unless you specifically need to use previous versions of methods\/functions in older support library revisions.<\/li>\n<li>In SDK Manager, you want to ensure you have Support <span style=\"text-decoration: underline;\">Repository<\/span> installed.<\/li>\n<li><a href=\"https:\/\/developer.android.com\/tools\/support-library\/setup.html\">Android Studio uses the <strong>Support Repository<\/strong><\/a>, <em>not<\/em> the Support Library (which I assume is\u00a0for Eclipse projects). \u00a0Make sure you have the Support <em><strong>Repository<\/strong><\/em> installed. \u00a0Generally you&#8217;ll want this library updated to the latest version, so update it within SDK Manager when you see an update is available.<\/li>\n<\/ul>\n<\/li>\n<li>After correcting version numbers in build.gradle, Android Studio will request you Sync with the following message:\n<ul>\n<li><strong>Gradle files have changed since last project sync. \u00a0A project sync may be necessary for the IDE to work properly.<\/strong> \u00a0<span style=\"text-decoration: underline;\">Sync Now.<\/span><\/li>\n<li>Click the blue Sync Now link to sync your project.<\/li>\n<li><a href=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-now-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-404\" src=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-now-1-1024x290.png\" alt=\"gradle-sync-now\" width=\"665\" height=\"188\" srcset=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-now-1-1024x290.png 1024w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-now-1-300x85.png 300w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-now-1-768x218.png 768w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-now-1-1536x435.png 1536w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-now-1.png 1778w\" sizes=\"(max-width: 665px) 100vw, 665px\" \/><\/a><\/li>\n<\/ul>\n<\/li>\n<li>After sync try building your project using Cmd + F9 (Control + F9 for Windows). \u00a0Hopefully the Android Studio project builds without errors.<\/li>\n<li>If all goes well, you see a tiny completion message, bottom left corner saying: Gradle build finished in 2 sec.<\/li>\n<li>If things go wrong, the Messages window will pop-up showing the error<\/li>\n<li><a href=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-error-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-407\" src=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-error-1-1024x253.png\" alt=\"gradle-sync-error\" width=\"665\" height=\"164\" srcset=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-error-1-1024x253.png 1024w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-error-1-300x74.png 300w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-error-1-768x190.png 768w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-error-1-1536x380.png 1536w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/gradle-sync-error-1.png 1770w\" sizes=\"(max-width: 665px) 100vw, 665px\" \/><\/a><\/li>\n<li>Language Level Changed &#8211; Answer Yes<\/li>\n<li><a href=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/language-levels-change-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-412\" src=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/language-levels-change-1-300x91.png\" alt=\"language-levels-change\" width=\"300\" height=\"91\" srcset=\"https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/language-levels-change-1-300x91.png 300w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/language-levels-change-1-768x234.png 768w, https:\/\/installingcats.com\/wp-content\/uploads\/2015\/03\/language-levels-change-1.png 978w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Matching SDK versions\u00a0identified in build.gradle (Module: app) with the SDK versions you have installed via SDK Manager, then &#8220;Sync Now&#8221;, will fix\u00a0most Android Studio build errors. Common Android Studio build errors: Failed to Sync Gradle project Failed to find target android-21 Install missing platform(s) and sync project If you&#8217;re building \/ running someone else&#8217;s project [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,2],"tags":[235,238],"_links":{"self":[{"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/posts\/400"}],"collection":[{"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/comments?post=400"}],"version-history":[{"count":0,"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/posts\/400\/revisions"}],"wp:attachment":[{"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/media?parent=400"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/categories?post=400"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/installingcats.com\/wp-json\/wp\/v2\/tags?post=400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}