相关疑难解决方法(0)

您好亲爱的stackoverflower,

在我的项目中,我正在使用新的"android设计库".问题是,有一个运行时异常说(我试图创建一个FloatingButton):

 java.lang.RuntimeException: Failed to resolve attribute at index 6
        at android.content.res.TypedArray.getColorStateList(TypedArray.java:426)
        at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:91)
        at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:79)
        at android.support.design.widget.FloatingActionButton.<init>(FloatingActionButton.java:75)

我弄清楚了哪个属性无法解决:

<style name="Widget.Design.FloatingActionButton" parent="android:Widget">
    <item name="android:background">@drawable/fab_background</item>
    <item name="backgroundTint">?attr/colorAccent</item>  **!! this one is missing !!**
    <item name="fabSize">normal</item>
    <item name="elevation">@dimen/fab_elevation</item>
    <item name="pressedTranslationZ">@dimen/fab_translation_z_pressed</item>
    <item name="rippleColor">?attr/colorControlHighlight</item>
    <item name="borderWidth">@dimen/fab_border_width</item>
</style>

它位于android-design-library中的res/values/styles/styles.xml中

我在这篇文章中读过API lvl应该是21+.但是由于设计库支持API 7+,实际上这应该不是问题.

值得一提的是,我没有将设计库包含为这样的gradle依赖:

 compile 'com.android.support:design:22.2.0'

我正在手动将库添加到项目中,因为Jenkins服务器无法访问Internet.我已将support-v4库更新为21.2.0,同时包含并更新了appcompat support-v7.

这是android-design-library gradle文件:

android {
compileSdkVersion 21
buildToolsVersion "21.1.2"

defaultConfig {
    minSdkVersion 17
    targetSdkVersion 21
}

buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
    }
} …

我正在使用以下类创建图标化弹出菜单:

public class IconizedMenu implements MenuBuilder.Callback, MenuPresenter.Callback {
    private Context mContext;
    private MenuBuilder mMenu;
    private View mAnchor;
    private MenuPopupHelper mPopup;
    private OnMenuItemClickListener mMenuItemClickListener;
    private OnDismissListener mDismissListener;

    /**
     * Callback interface used to notify the application that the menu has closed.
     */
    public interface OnDismissListener {
        /**
         * Called when the associated menu has been dismissed.
         *
         * @param menu The PopupMenu that was dismissed.
         */
        public void onDismiss(IconizedMenu menu);
    }

    /**
     * Construct a new PopupMenu.
     *
     * @param context …