2013年8月23日星期五

新建的Android程式,預設無Menu bar (Action bar)

最近新建Android程式,發現Theme等背景都幫你設好了,
原本新建好的Android背景是黑的,
但新近建的Android程式,背景是白的;

查了一下,
原本是在 AndroidManifest.xml中多了android:theme="@style/AppTheme"

 <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >

反正是程式自行建立的,所以應該不是壞事,
結果問題來了,在Activity中的onCreateOptionsMenu竟然跑不進去,



@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
Log.d(TAG, "onCreateOptionsMenu");
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

在Log裡面居然看不到它印出onCreateOptionsMenu的Log,
趕緊上網路查查去;
原來要修改style.xml(這也是程式自己產生的)

<resources>

    <!--
        Base application theme, dependent on API level. This theme is replaced
        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
    -->
    <style name="AppBaseTheme" parent="android:Theme.Light">
        <!--
            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
        -->
    </style>

    <!-- Application theme. -->
    <style name="AppTheme" parent="AppBaseTheme">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    </style>

</resources>



原本的Theme使用是android:Theme.Light是不會產生Menu bar(Action bar)的,
要用android:Theme.Holo.Light來取代,修改如下:


<resources>

    <!--
        Base application theme, dependent on API level. This theme is replaced
        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
    -->
    <style name="AppBaseTheme" parent="android:Theme.Holo.Light">
        <!--
            Theme customizations available in newer API levels can go in
            res/values-vXX/styles.xml, while customizations related to
            backward-compatibility can go here.
        -->
    </style>

    <!-- Application theme. -->
    <style name="AppTheme" parent="AppBaseTheme">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
    </style>

</resources>


這樣程式就會正常了。

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