我正在使用 Android Studio，当我添加compile "com.android.support:appcompat-v7:21.0.0"到我的 Gradle 文件时，我遇到了很多错误：

C:\Users\WindowsSucks\AndroidStudioProjects\MMMeds\app\build\intermediates\exploded-aar\com.android.support\appcompat-v7\21.0.0\res\values-v11\values.xml
Error:(36, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
Error:(36, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
Error:(36, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
Error:(36, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
C:\Users\WindowsSucks\AndroidStudioProjects\MMMeds\app\build\intermediates\exploded-aar\com.android.support\appcompat-v7\21.0.0\res\values-v14\values.xml
Error:(9, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
Error:(9, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
Error:(9, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
Error:(9, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
C:\Users\WindowsSucks\AndroidStudioProjects\MMMeds\app\build\intermediates\exploded-aar\com.android.support\appcompat-v7\21.0.0\res\values-v21\values.xml
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Body1'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Body2'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Button'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Caption'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Display1'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Display2'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Display3'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Display4'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Headline'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Inverse'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Large'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Large.Inverse'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.PopupMenu.Large'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.PopupMenu.Small'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Medium'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Medium.Inverse'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Menu'.
Error:Error retrieving parent for item: No resource found that matches the given name '@android:TextAppearance.Material.SearchResult.Subtitle'.
Error:Error retrieving parent for item: No resource found that matches the given name '@android:TextAppearance.Material.SearchResult.Title'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Small'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Small.Inverse'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Subhead'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Title'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.ActionBar.Menu'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.ActionBar.Subtitle'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.ActionBar.Subtitle.Inverse'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.ActionBar.Title'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.ActionBar.Title.Inverse'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.ActionMode.Subtitle'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.ActionMode.Title'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.PopupMenu.Large'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.PopupMenu.Small'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Button'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.ActionBar.Subtitle'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Widget.ActionBar.Title'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:ThemeOverlay.Material'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:ThemeOverlay.Material.ActionBar'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:ThemeOverlay.Material.Dark'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:ThemeOverlay.Material.Dark.ActionBar'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:ThemeOverlay.Material.Light'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.ActionBar.TabText'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.ActionBar.TabView'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.ActionButton'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.ActionButton.CloseMode'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.ActionButton.Overflow'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.AutoCompleteTextView'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.DropDownItem.Spinner'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.Light.ActionBar.TabText'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.Light.ActionBar.TabText'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.Light.ActionBar.TabView'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.AutoCompleteTextView'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.Light.PopupMenu'.
Error:(298, 21) No resource found that matches the given name: attr 'android:overlapAnchor'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.ListPopupWindow'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.ListView.DropDown'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.ListView'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.PopupMenu'.
Error:(298, 21) No resource found that matches the given name: attr 'android:overlapAnchor'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.ProgressBar'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.ProgressBar.Horizontal'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.Spinner'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.Spinner'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Widget.Material.Toolbar.Button.Navigation'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Theme.Material'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Theme.Material.Dialog'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Theme.Material.Light'.
Error:Error retrieving parent for item: No resource found that matches the given name 'android:Theme.Material.Light.Dialog'.
Error:(144, 21) No resource found that matches the given name: attr 'android:colorAccent'.
Error:(146, 21) No resource found that matches the given name: attr 'android:colorControlActivated'.
Error:(147, 21) No resource found that matches the given name: attr 'android:colorControlHighlight'.
Error:(145, 21) No resource found that matches the given name: attr 'android:colorControlNormal'.
Error:(142, 21) No resource found that matches the given name: attr 'android:colorPrimary'.
Error:(143, 21) No resource found that matches the given name: attr 'android:colorPrimaryDark'.
Error:(144, 21) No resource found that matches the given name: attr 'android:colorAccent'.
Error:(146, 21) No resource found that matches the given name: attr 'android:colorControlActivated'.
Error:(147, 21) No resource found that matches the given name: attr 'android:colorControlHighlight'.
Error:(145, 21) No resource found that matches the given name: attr 'android:colorControlNormal'.
Error:(142, 21) No resource found that matches the given name: attr 'android:colorPrimary'.
Error:(143, 21) No resource found that matches the given name: attr 'android:colorPrimaryDark'.
Error:(144, 21) No resource found that matches the given name: attr 'android:colorAccent'.
Error:(146, 21) No resource found that matches the given name: attr 'android:colorControlActivated'.
Error:(147, 21) No resource found that matches the given name: attr 'android:colorControlHighlight'.
Error:(145, 21) No resource found that matches the given name: attr 'android:colorControlNormal'.
Error:(142, 21) No resource found that matches the given name: attr 'android:colorPrimary'.
Error:(143, 21) No resource found that matches the given name: attr 'android:colorPrimaryDark'.
Error:(144, 21) No resource found that matches the given name: attr 'android:colorAccent'.
Error:(146, 21) No resource found that matches the given name: attr 'android:colorControlActivated'.
Error:(147, 21) No resource found that matches the given name: attr 'android:colorControlHighlight'.
Error:(145, 21) No resource found that matches the given name: attr 'android:colorControlNormal'.
Error:(142, 21) No resource found that matches the given name: attr 'android:colorPrimary'.
Error:(143, 21) No resource found that matches the given name: attr 'android:colorPrimaryDark'.

所有这些似乎都出现在：

\app\build\intermediates\exploded-aar\com.android.support\appcompat-v7\21.0.0\res\values-v11\values.xml

和

\app\build\intermediates\exploded-aar\com.android.support\appcompat-v7\21.0.0\res\values-v21\values.xml