Android Activity定制需要的Title

Activity界面默认的Title是只有文字描述的，当我们想要做成类似微信中Tilte行带有导航和多功能效果的时候，我们就需要自己去定义需要的布局来加载它。
Activity的全屏显示和去掉Title，说白了就是改变Window窗口features

01   /** Flag for the "options panel" feature.  This is enabled by default. */

02   publicstatic final int FEATURE_OPTIONS_PANEL = 0;

03   /** Flag for the "no title" feature, turning off the title at the top

04     *  of the screen. */

05   publicstatic final int FEATURE_NO_TITLE = 1;

06   /** Flag for the progress indicator feature */

07   publicstatic final int FEATURE_PROGRESS = 2;

08   /** Flag for having an icon on the left side of the title bar */

09   publicstatic final int FEATURE_LEFT_ICON = 3;

10   /** Flag for having an icon on the right side of the title bar */

11   publicstatic final int FEATURE_RIGHT_ICON = 4;

12   /** Flag for indeterminate progress */

13   publicstatic final int FEATURE_INDETERMINATE_PROGRESS = 5;

14   /** Flag for the context menu.  This is enabled by default. */

15   publicstatic final int FEATURE_CONTEXT_MENU = 6;

16   /** Flag for custom title. You cannot combine this feature with other title features. */

17   publicstatic final int FEATURE_CUSTOM_TITLE = 7;

18   /**

19     * Flag for enabling the Action Bar.

20     * This is enabled by default for some devices. The Action Bar

21     * replaces the title bar and provides an alternate location

22     * for an on-screen menu button on some devices.

23     */

24   publicstatic final int FEATURE_ACTION_BAR = 8;

25   /**

26     * Flag for requesting an Action Bar that overlays window content.

27     * Normally an Action Bar will sit in the space above window content, but if this

28     * feature is requested along with {@link #FEATURE_ACTION_BAR} it will be layered over

29     * the window content itself. This is useful if you would like your app to have more control

30     * over how the Action Bar is displayed, such as letting application content scroll beneath

31     * an Action Bar with a transparent background or otherwise displaying a transparent/translucent

32     * Action Bar over application content.

33     *

34     * <p>This mode is especially useful with {@link View#SYSTEM_UI_FLAG_FULLSCREEN

35     * View.SYSTEM_UI_FLAG_FULLSCREEN}, which allows you to seamlessly hide the

36     * action bar in conjunction with other screen decorations.

37     *

38     * <p>As of {@link android.os.Build.VERSION_CODES#JELLY_BEAN}, when an

39     * ActionBar is in this mode it will adjust the insets provided to

40     * {@link View#fitSystemWindows(android.graphics.Rect) View.fitSystemWindows(Rect)}

41     * to include the content covered by the action bar, so you can do layout within

42     * that space.

43     */

44   publicstatic final int FEATURE_ACTION_BAR_OVERLAY = 9;

45   /**

46     * Flag for specifying the behavior of action modes when an Action Bar is not present.

47     * If overlay is enabled, the action mode UI will be allowed to cover existing window content.

48     */

49   publicstatic final int FEATURE_ACTION_MODE_OVERLAY = 10;

通过上面的源码我们可以看到，如果我要定制自己的Title，我们需要采用Window.FEATURE_CUSTOM_TITLE这个特征来实现。
需要注意的是，Window.FEATURE_CUSTOM_TITLE这个特征不能其他特征一起使用，还有就是必须在setContentView()方法之前使用（这个是所有Window特征改变的必须条件），不然无效


首先是布局文件

01<?xml version="1.0"encoding="utf-8"?>

02<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

03   android:layout_width="fill_parent"

04   android:layout_height="wrap_content">

05 

06   <ImageView

07        android:layout_width="wrap_content"

08        android:layout_height="wrap_content"

09        android:layout_alignParentLeft="true"

10        android:background="@drawable/ic_launcher"/>

11 

12   <TextView

13        android:id="@+id/title"

14        android:layout_width="wrap_content"

15        android:layout_height="wrap_content"

16        android:layout_centerInParent="true"

17        android:shadowColor="#000986"

18        android:shadowDx="1"

19        android:shadowDy="1"

20        android:shadowRadius="1"

21        android:textColor="@android:color/white"

22        android:textSize="20sp"

23        android:textStyle="bold"/>

24 

25   <ImageView

26        android:layout_width="wrap_content"

27        android:layout_height="wrap_content"

28        android:layout_alignParentRight="true"

29        android:background="@drawable/ic_launcher"/>

30 

31</RelativeLayout>

01<?xml version="1.0"encoding="utf-8"?>

02<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

03   android:layout_width="fill_parent"

04   android:layout_height="wrap_content">

05 

06   <ImageView

07        android:layout_width="wrap_content"

08        android:layout_height="wrap_content"

09        android:layout_alignParentLeft="true"

10        android:background="@drawable/ic_launcher"/>

11 

12   <TextView

13        android:id="@+id/title"

14        android:layout_width="wrap_content"

15        android:layout_height="wrap_content"

16        android:layout_centerInParent="true"

17        android:shadowColor="#000986"

18        android:shadowDx="1"

19        android:shadowDy="1"

20        android:shadowRadius="1"

21        android:textColor="@android:color/white"

22        android:textSize="20sp"

23        android:textStyle="bold"/>

24 

25   <ImageView

26        android:layout_width="wrap_content"

27        android:layout_height="wrap_content"

28        android:layout_alignParentRight="true"

29        android:background="@drawable/ic_launcher"/>

30 

31</RelativeLayout>

我只加入了2张图片，大家可以按照自己的需要来添加元素



下面就上代码了

1getWindow().requestFeature(Window.FEATURE_CUSTOM_TITLE);

2 

3setContentView(R.layout.main);

4 

5getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title);

这样就实现了自定义Title的效果，当时，当我们运行在android sdk 3.0以上的时候会出现
报如下错误：android.util.AndroidRuntimeException: You cannot combine custom titles with other title features



原因在于，3.0以上的系统默认使用了Window.FEATURE_ACTION_BAR，我们需要使用自己的样式来修改它
首先考虑到不同版本，建立vlaues-v11和values-v14两个文件夹满足，3.0以上和4.0以上
看样式style.xml
改变背景色修改android:windowTitleBackgroundStyle的值，改变标题栏高度则修改 android:windowTitleSize的值
去掉windowActionBar特征

01<resources>

02 

03   <!--

04        Base application theme forAPI 14+. This theme completely replaces

05        AppBaseTheme from BOTH res/values/styles.xml and

06        res/values-v11/styles.xml on API 14+ devices.

07   -->

08   <style name="AppBaseTheme"parent="android:Theme.Holo.Light.DarkActionBar">

09        <!-- API 14theme customizations can go here. -->

10        <item name="android:windowActionBar">false</item>

11        <item name="android:windowTitleSize">50dip</item>

12        <item name="android:windowTitleBackgroundStyle">@style/CustomWindowTitleBackground</item>

13   </style>

14    

15   <style name="CustomWindowTitleBackground">

16        <item name="android:background">@drawable/stripes</item>

17   </style>

18 

19</resources>

接着再修改AndroidManifest.xml文件，找到要自定义标题栏的Activity，添加上android:theme值，       
<activity android:name=".MainActivity" android:theme="@style/activityTitlebar"> 这样就解决了问题