有关style的查找

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在源码中有如下AlertDialog

protected AlertDialog(Context context) {        this(context, com.android.internal.R.style.Theme_Dialog_Alert);    }

其中Theme_Dialog_Alert在哪里呢？

我们到res下面找到value里面的themes.xml里面的Theme_Dialog_Alert，但是这样是找不到的，需要把下划线"_"改成"."，这样就ok了

    <!-- Default theme for alert dialog windows, which is used by the         {@link android.app.AlertDialog} class.  This is basically a dialog         but sets the background to empty so it can do two-tone backgrounds. -->    <style name="Theme.Dialog.Alert">        <item name="windowBackground">@android:color/transparent</item> <item name="android:windowBackground">@android:color/transparent</item>        <item name="windowTitleStyle">@android:style/DialogWindowTitle</item>        <item name="windowIsFloating">true</item>        <item name="windowContentOverlay">@null</item> <item name="android:gravity">center</item>    </style>

在AlertController中

        TypedArray a = mContext.obtainStyledAttributes(                null, com.android.internal.R.styleable.AlertDialog, com.android.internal.R.attr.alertDialogStyle, 0);

针对R.attr.alertDialogStyle

pateo@pateo-B86N53X:/work/project/f0400s/frameworks/base/core/res$ grep -r "alertDialogStyle" ././res/values/attrs.xml:        <attr name="alertDialogStyle" format="reference" />./res/values/attrs.xml:        <attr name="dlsalertDialogStyle" format="reference" />./res/values/public.xml:  <public type="attr" name="alertDialogStyle" id="0x0101005d" />./res/values/themes.xml:        <item name="alertDialogStyle">@android:style/AlertDialog</item>./res/values/themes.xml:        <item name="dlsalertDialogStyle">@android:style/DlsAlertDialog</item>pateo@pateo-B86N53X:/work/project/f0400s/frameworks/base/core/res$ pateo@pateo-B86N53X:/work/project/f0400s/frameworks/base/core/res$

找到styles.xml文件里面的AlertDialog

    <style name="AlertDialog">        <item name="fullDark">@android:drawable/popup_full_dark</item>        <item name="topDark">@android:drawable/popup_top_dark</item>        <item name="centerDark">@android:drawable/popup_center_dark</item>        <item name="bottomDark">@android:drawable/popup_bottom_dark</item>        <item name="fullBright">@android:drawable/popup_full_bright</item>        <item name="topBright">@android:drawable/popup_top_bright</item>        <item name="centerBright">@android:drawable/popup_center_bright</item>        <item name="bottomBright">@android:drawable/popup_bottom_bright</item>        <item name="bottomMedium">@android:drawable/popup_bottom_medium</item>        <item name="centerMedium">@android:drawable/popup_center_medium</item>        </style>

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