Android custom title bar

 

The first step is to customize the title bar to be written in the oncreate method.

Requestwindowfeature (window. feature_custom_title );

2. Setcontentview (R. layout. Main );
3. Getwindow (). setfeatureint (window. feature_custom_title, R. layout. title_bar );

Note:

Requestwindowfeature must be before setcontentview

Getwindow (). setfeatureinit is better after setcontentview

Step 2: write your own layout file to customize the title bar.

However, we may encounter some problems, that is, the height of the title bar cannot be customized ~ The following is the solution ~

Next, let's take a look at the XML file of the title bar of Android in the source framework.

Screen_custom_title.xml

<Linearlayout Android: Orientation = "vertical" Android: fitssystemwindows = "true">

1. <Framelayout Android: Id = "@ Android: ID/title_container"
2. Android: layout_width = "match_parent"
3. Android: layout_height = "? Android: ATTR/windowtitlesize"
4. Style = "? Android: ATTR/windowtitlebackgroundstyle ">
5. </Framelayout>
6. <Framelayout Android: Id = "@ Android: ID/content"
7. Android: layout_width = "match_parent"
8. Android: layout_height = "0dip"
9. Android: layout_weight = "1"
10. Android: foregroundgravity = "fill_horizontal | top"
11. Android: foreground = "? Android: ATTR/windowcontentoverlay "/>
12. </Linearlayout>

Screen_title.xml

<Linearlayout Android: Orientation = "vertical" Android: fitssystemwindows = "true">

1. −
2. <Framelayout Android: layout_width = "match_parent"
3. Android: layout_height = "? Android: ATTR/windowtitlesize"
4. Style = "? Android: ATTR/windowtitlebackgroundstyle ">
5. <Textview Android: Id = "@ Android: ID/Title"
6. Style = "? Android: ATTR/windowtitlestyle"
7. Android: Background = "@ null"
8. Android: fadingedge = "horizontal"
9. Android: gravity = "center_vertical"
10. Android: layout_width = "match_parent"
11. Android: layout_height = "match_parent"/>
12. </Framelayout>
13. <Framelayout Android: Id = "@ Android: ID/content"
14. Android: layout_width = "match_parent"
15. Android: layout_height = "0dip"
16. Android: layout_weight = "1"
17. Android: foregroundgravity = "fill_horizontal | top"
18. Android: foreground = "? Android: ATTR/windowcontentoverlay "/>
19. </Linearlayout>

Since it is a custom title, let's take a look at screen_custom_title.xml, which contains a title_container and a content, which are combined into a title bar. The view given by the custom title, content is used as a sub-view, which cannot affect the title_container and content. Therefore, if you want to get it, it should be left blank, but you have no choice.
Check that title_container has a style like this:

Style = "? Android: ATTR/windowtitlebackgroundstyle"

Content's foreground is Android: foreground = "? Android: ATTR/windowcontentoverlay"

We can write a style by ourselves.

<Resources xmlns: Android = "http://schemas.android.com/apk/res/android">

3. <Style name = "customwindowtitlebackground">
4. <Item name = "Android: background"> #00cc00 </item>
5. </Style>
8. <Style name = "test" parent = "Android: Theme">
9. <Item name = "Android: windowtitlesize"> 50dp </item>
10. <Item name = "Android: windowtitlebackgroundstyle"> @ style/customwindowtitlebackground </item>
11. </Style>
12. </Resources>

Add to androidmanifest

<Activity Android: Name = ". customtitilebaractivity"

1. Android: Label = "@ string/app_name" Android: theme = "@ style/title_bar">
2. <Intent-filter>
3. <Action Android: Name = "android. Intent. Action. Main"/>
4. <Category Android: Name = "android. Intent. Category. launcher"/>
5. </Intent-filter>
6. </Activity>