android activity 自定义标题 工具栏 requestWindowFeature

当应用需要一个相同的标题时或者是工具栏时我们可以使用requestWindowFeature属性：

public class AndroidTestActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
        setContentView(R.layout.main);
        getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.title);
    }
}

R.layout.title为标题的布局。

要使用这个属性还需要给Manifest.xml属性中相应的activity设置theme属性，否则会报错。

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".AndroidTestActivity"
              android:theme="@style/tudou_titlebar"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

theme属性：

<resources>
       <style name="tudou_titlebar" parent="@android:style/Theme">
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowTitleSize">40dp</item>
        <item name="android:windowTitleBackgroundStyle">@style/CustomWindowTitleBackground</item>
    </style>
        <style name="CustomWindowTitleBackground">
        <item name="android:background">@android:color/darker_gray</item>
    </style>
</resources>