（第一次寫部落格勿噴 謝謝）

有的小夥伴用新建的專案就沒法編譯
出現圖中錯誤
app/build.gradle
將其設定為compile ‘com.android.support:appcompat-v7:26.0.0’
更推薦升級AS

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當編輯器未發現錯誤，logcat也沒有的時候build->clean progect （未必有效）

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在新增圖片時：

Error:java.lang.RuntimeException: Some file crunching failed, see logs for details
Error:Execution failed for task ':app:mergeDebugResources'.
Error: java.lang.RuntimeException: Some file crunching failed, see logs for details
 

可在app/build.gradle中新增

  aaptOptions {
             cruncherEnabled = false
            useNewCruncher = false
    
        }

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在build檔案中，當代碼為：

  implementation 'com.android.support:design:24.1.0'
    mplementation 'com.android.support:appcompat-v7:28.0.0'
 

Alt+Enter提示訊息為：

All com.android.support libraries must use the exact same version specification (mixing versions can lead to runtime crashes). Found versions 28.0.0, 24.1.0. Examples include com.android.support:animated-vector-drawable:28.0.0 and com.android.support:design:24.1.0 less… (Ctrl+F1)
There are some combinations of libraries, or tools and libraries, that are incompatible, or can lead to bugs. One such incompatibility is compiling with a version of the Android support libraries that is not the latest version (or in particular, a version lower than your targetSdkVersion). Issue id: GradleCompatible

他們有相容問題可改成，可將程式碼改成

implementation 'com.android.support:design:28.0.0'

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element relativelayout must be declared 說明.xml檔案所在的包（檔案）不對