【基于最新的Android4.4的源码分析】
每家公司或者每个移动团队无不想开发出一套自己的UI框架,融入自己的设计和特性,这必然会去修改android的ui。
所以,学习和理解android的UI设计是最基础和非常有必要的。
android
ui设计最重要的就是主题和样式。
1、位置
在Android的frameworks/base/core/res/res/values目录下有一下几个文件:
1
2
3
4
|
themes.xml themes_device_defaults.xml styles.xml styles_device_defaults.xml |
分别定义了各种系统Theme,Style。
2、主题Theme
主要关注themes.xml,themes_device_defaults.xml两个文件。
themes.xml定义了android低版本的theme和Holo
theme,themes_device_defaults.xml定义了DeviceDefault主题(继承自Holo主题),实际上就是在Holo主题上定制主题(For厂商)。
系统如何去选择默认的主题呢?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
/**frameworks/base/core/java/android/content/res/Resources.java*/ /** @hide */ public static int selectDefaultTheme( int
curTheme, int
targetSdkVersion) {
return
selectSystemTheme(curTheme, targetSdkVersion,
com.android.internal.R.style.Theme,
com.android.internal.R.style.Theme_Holo,
com.android.internal.R.style.Theme_DeviceDefault);
} /** @hide */ public
static int selectSystemTheme( int
curTheme, int
targetSdkVersion,
int
orig, int
holo, int
deviceDefault) {
if
(curTheme != 0 ) {
return
curTheme;
}
if
(targetSdkVersion < Build.VERSION_CODES.HONEYCOMB) {
// < 11
return
orig;
}
if
(targetSdkVersion < Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
// < 14
return
holo;
}
return
deviceDefault;
} |
当<11时,使用以前低版本主题;当>=11&&<14,使用Holo主题;>14的时候,使用DeviceDefault主题。
方便理解,下面把目前所有的版本号列出来,也顺便温习一下android的历史:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
public static class VERSION_CODES {
/**
* Magic version number for a current development build, which has
* not yet turned into an official release.
*/
public
static final int CUR_DEVELOPMENT = 10000 ;
/**
* October 2008: The original, first, version of Android. Yay!
*/
public
static final int BASE = 1 ;
/**
* February 2009: First Android update, officially called 1.1.
*/
public
static final int BASE_1_1 = 2 ;
/**
* May 2009: Android 1.5.
*/
public
static final int CUPCAKE = 3 ;
/**
* September 2009: Android 1.6.
*/
public
static final int DONUT = 4 ;
/**
* November 2009: Android 2.0
*/
public
static final int ECLAIR = 5 ;
/**
* December 2009: Android 2.0.1
*/
public
static final int ECLAIR_0_1 = 6 ;
/**
* January 2010: Android 2.1
*/
public
static final int ECLAIR_MR1 = 7 ;
/**
* June 2010: Android 2.2
*/
public
static final int FROYO = 8 ;
/**
* November 2010: Android 2.3
*/
public
static final int GINGERBREAD = 9 ;
/**
* February 2011: Android 2.3.3.
*/
public
static final int GINGERBREAD_MR1 = 10 ;
/**
* February 2011: Android 3.0.
*/
public
static final int HONEYCOMB = 11 ;
/**
* May 2011: Android 3.1.
*/
public
static final int HONEYCOMB_MR1 = 12 ;
/**
* June 2011: Android 3.2.
*/
public
static final int HONEYCOMB_MR2 = 13 ;
/**
* October 2011: Android 4.0.
*/
public
static final int ICE_CREAM_SANDWICH = 14 ;
/**
* December 2011: Android 4.0.3.
*/
public
static final int ICE_CREAM_SANDWICH_MR1 = 15 ;
/**
* June 2012: Android 4.1.
*/
public
static final int JELLY_BEAN = 16 ;
/**
* Android 4.2: Moar jelly beans!
*/
public
static final int JELLY_BEAN_MR1 = 17 ;
/**
* Android 4.3: Jelly Bean MR2, the revenge of the beans.
*/
public
static final int JELLY_BEAN_MR2 = 18 ;
/**
* Android 4.4: KitKat, another tasty treat.
*/
public
static final int KITKAT = 19 ;
} |
3、系统主题Theme列表
系统默认大的主题是三种:Theme,Theme.Holo,Theme.DeviceDefault,
但是实际上在此基础系统还定义了大量的派生主题,最典型的是对应的Light主题。
除此之外,还有很多,在此一一列出,打字太痛苦了,我贴出截图:
了解android系统定义的主题之后,我们就可以根据实际情况在自己的应用中使用这些主题,但是如果想修改主题的某些内容,需要进一步深入。
4、详解每个主题中定义item分类
一个完整的主题应该定义哪些内容呢,以Theme为例,如下:
1)颜色
1
2
3
4
5
6
7
8
9
10
|
<item name= "colorForeground" > @android :color/bright_foreground_dark</item>
<item name= "colorForegroundInverse" > @android :color/bright_foreground_dark_inverse</item>
<item name= "colorBackground" > @android :color/background_dark</item>
<item name= "colorBackgroundCacheHint" >?android:attr/colorBackground</item>
<item name= "colorPressedHighlight" > @color /legacy_pressed_highlight</item>
<item name= "colorLongPressedHighlight" > @color /legacy_long_pressed_highlight</item>
<item name= "colorFocusedHighlight" > @color /legacy_selected_highlight</item>
<item name= "colorMultiSelectHighlight" > @color /legacy_selected_highlight</item>
<item name= "colorActivatedHighlight" > @color /legacy_selected_highlight</item>
|
2)字体
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
<!-- Text styles --> <item name= "textAppearance" > @android :style/TextAppearance</item>
<item name= "textAppearanceInverse" > @android :style/TextAppearance.Inverse</item>
<item name= "textColorPrimary" > @android :color/primary_text_dark</item>
<item name= "textColorSecondary" > @android :color/secondary_text_dark</item>
<item name= "textColorTertiary" > @android :color/tertiary_text_dark</item>
<item name= "textColorPrimaryInverse" > @android :color/primary_text_light</item>
<item name= "textColorSecondaryInverse" > @android :color/secondary_text_light</item>
<item name= "textColorTertiaryInverse" > @android :color/tertiary_text_light</item>
<item name= "textColorPrimaryDisableOnly" > @android :color/primary_text_dark_disable_only</item>
<item name= "textColorPrimaryInverseDisableOnly" > @android :color/primary_text_light_disable_only</item>
<item name= "textColorPrimaryNoDisable" > @android :color/primary_text_dark_nodisable</item>
<item name= "textColorSecondaryNoDisable" > @android :color/secondary_text_dark_nodisable</item>
<item name= "textColorPrimaryInverseNoDisable" > @android :color/primary_text_light_nodisable</item>
<item name= "textColorSecondaryInverseNoDisable" > @android :color/secondary_text_light_nodisable</item>
<item name= "textColorHint" > @android :color/hint_foreground_dark</item>
<item name= "textColorHintInverse" > @android :color/hint_foreground_light</item>
<item name= "textColorSearchUrl" > @android :color/search_url_text</item>
<item name= "textColorHighlight" > @android :color/highlighted_text_dark</item>
<item name= "textColorHighlightInverse" > @android :color/highlighted_text_light</item>
<item name= "textColorLink" > @android :color/link_text_dark</item>
<item name= "textColorLinkInverse" > @android :color/link_text_light</item>
<item name= "textColorAlertDialogListItem" > @android :color/primary_text_light_disable_only</item>
<item name= "textAppearanceLarge" > @android :style/TextAppearance.Large</item>
<item name= "textAppearanceMedium" > @android :style/TextAppearance.Medium</item>
<item name= "textAppearanceSmall" > @android :style/TextAppearance.Small</item>
<item name= "textAppearanceLargeInverse" > @android :style/TextAppearance.Large.Inverse</item>
<item name= "textAppearanceMediumInverse" > @android :style/TextAppearance.Medium.Inverse</item>
<item name= "textAppearanceSmallInverse" > @android :style/TextAppearance.Small.Inverse</item>
<item name= "textAppearanceSearchResultTitle" > @android :style/TextAppearance.SearchResult.Title</item>
<item name= "textAppearanceSearchResultSubtitle" > @android :style/TextAppearance.SearchResult.Subtitle</item>
<item name= "textAppearanceEasyCorrectSuggestion" > @android :style/TextAppearance.EasyCorrectSuggestion</item>
<item name= "textAppearanceMisspelledSuggestion" > @android :style/TextAppearance.MisspelledSuggestion</item>
<item name= "textAppearanceAutoCorrectionSuggestion" > @android :style/TextAppearance.AutoCorrectionSuggestion</item>
<item name= "textAppearanceButton" > @android :style/TextAppearance.Widget.Button</item>
<item name= "editTextColor" > @android :color/primary_text_light</item>
<item name= "editTextBackground" > @android :drawable/edit_text</item>
<item name= "candidatesTextStyleSpans" > @android :string/candidates_style</item>
<item name= "textCheckMark" > @android :drawable/indicator_check_mark_dark</item>
<item name= "textCheckMarkInverse" > @android :drawable/indicator_check_mark_light</item>
<item name= "textAppearanceLargePopupMenu" > @android :style/TextAppearance.Widget.PopupMenu.Large</item>
<item name= "textAppearanceSmallPopupMenu" > @android :style/TextAppearance.Widget.PopupMenu.Small</item>
|
3)按钮
1
2
3
4
5
6
7
8
9
10
11
|
<!-- Button styles --> <item name= "buttonStyle" > @android :style/Widget.Button</item>
<item name= "buttonStyleSmall" > @android :style/Widget.Button.Small</item>
<item name= "buttonStyleInset" > @android :style/Widget.Button.Inset</item>
<item name= "buttonStyleToggle" > @android :style/Widget.Button.Toggle</item>
<item name= "selectableItemBackground" > @android :drawable/item_background</item>
<item name= "borderlessButtonStyle" >?android:attr/buttonStyle</item>
<item name= "homeAsUpIndicator" > @android :drawable/ic_ab_back_holo_dark</item>
|
4)List
1
2
3
4
5
6
7
8
9
10
11
|
<!-- List attributes --> <item name= "listPreferredItemHeight" >64dip</item>
<item name= "listPreferredItemHeightSmall" >?android:attr/listPreferredItemHeight</item>
<item name= "listPreferredItemHeightLarge" >?android:attr/listPreferredItemHeight</item>
<item name= "dropdownListPreferredItemHeight" >?android:attr/listPreferredItemHeight</item>
<item name= "textAppearanceListItem" >?android:attr/textAppearanceLarge</item>
<item name= "textAppearanceListItemSmall" >?android:attr/textAppearanceLarge</item>
<item name= "listPreferredItemPaddingLeft" >6dip</item>
<item name= "listPreferredItemPaddingRight" >6dip</item>
<item name= "listPreferredItemPaddingStart" >6dip</item>
<item name= "listPreferredItemPaddingEnd" >6dip</item>
|
5)Window
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
|
<!-- Window attributes --> <item name= "windowBackground" > @android :drawable/screen_background_selector_dark</item>
<item name= "windowFrame" > @null </item>
<item name= "windowNoTitle" > false </item>
<item name= "windowFullscreen" > false </item>
<item name= "windowOverscan" > false </item>
<item name= "windowIsFloating" > false </item>
<item name= "windowContentOverlay" > @null </item>
<item name= "windowShowWallpaper" > false </item>
<item name= "windowTitleStyle" > @android :style/WindowTitle</item>
<item name= "windowTitleSize" >25dip</item>
<item name= "windowTitleBackgroundStyle" > @android :style/WindowTitleBackground</item>
<item name= "android:windowAnimationStyle" > @android :style/Animation.Activity</item>
<item name= "android:windowSoftInputMode" >stateUnspecified|adjustUnspecified</item>
<item name= "windowActionBar" > false </item>
<item name= "windowActionModeOverlay" > false </item>
<item name= "windowCloseOnTouchOutside" > false </item>
<item name= "windowTranslucentStatus" > false </item>
<item name= "windowTranslucentNavigation" > false </item>
|
6)Dialog
1
2
3
4
5
|
<!-- Dialog attributes --> <item name= "dialogTheme" > @android :style/Theme.Dialog</item>
<item name= "dialogTitleIconsDecorLayout" > @layout /dialog_title_icons</item>
<item name= "dialogCustomTitleDecorLayout" > @layout /dialog_custom_title</item>
<item name= "dialogTitleDecorLayout" > @layout /dialog_title</item>
|
7)AlertDialog
1
2
3
4
5
|
<!-- AlertDialog attributes --> <item name= "alertDialogTheme" > @android :style/Theme.Dialog.Alert</item>
<item name= "alertDialogStyle" > @android :style/AlertDialog</item>
<item name= "alertDialogCenterButtons" > true </item>
<item name= "alertDialogIcon" > @android :drawable/ic_dialog_alert</item>
|
8)Panel
1
2
3
4
5
6
7
8
9
10
|
<!-- Panel attributes --> <item name= "panelBackground" > @android :drawable/menu_background</item>
<item name= "panelFullBackground" > @android :drawable/menu_background_fill_parent_width</item>
<!-- These three attributes do
not seems to be used by the framework. Declared public
though -->
<item name= "panelColorBackground" ># 000 </item>
<item name= "panelColorForeground" >?android:attr/textColorPrimary</item>
<item name= "panelTextAppearance" >?android:attr/textAppearance</item>
<item name= "panelMenuIsCompact" > false </item>
<item name= "panelMenuListWidth" >296dip</item>
|
9)滚动条(Scrollbar)
1
2
3
4
5
6
7
8
|
<!-- Scrollbar attributes --> <item name= "scrollbarFadeDuration" > 250 </item>
<item name= "scrollbarDefaultDelayBeforeFade" > 300 </item>
<item name= "scrollbarSize" >10dip</item>
<item name= "scrollbarThumbHorizontal" > @android :drawable/scrollbar_handle_horizontal</item>
<item name= "scrollbarThumbVertical" > @android :drawable/scrollbar_handle_vertical</item>
<item name= "scrollbarTrackHorizontal" > @null </item>
<item name= "scrollbarTrackVertical" > @null </item>
|
10)文字选中(Text selection)
1
2
3
4
5
6
7
8
9
10
11
12
|
<!-- Text selection handle attributes --> <item name= "textSelectHandleLeft" > @android :drawable/text_select_handle_left</item>
<item name= "textSelectHandleRight" > @android :drawable/text_select_handle_right</item>
<item name= "textSelectHandle" > @android :drawable/text_select_handle_middle</item>
<item name= "textSelectHandleWindowStyle" > @android :style/Widget.TextSelectHandle</item>
<item name= "textEditPasteWindowLayout" > @android :layout/text_edit_paste_window</item>
<item name= "textEditNoPasteWindowLayout" > @android :layout/text_edit_no_paste_window</item>
<item name= "textEditSidePasteWindowLayout" > @android :layout/text_edit_side_paste_window</item>
<item name= "textEditSideNoPasteWindowLayout" > @android :layout/text_edit_side_no_paste_window</item>
<item name= "textSuggestionsWindowStyle" > @android :style/Widget.TextSuggestionsPopupWindow</item>
<item name= "textEditSuggestionItemLayout" > @android :layout/text_edit_suggestion_item</item>
<item name= "textCursorDrawable" > @null </item>
|
有点长,下篇继续列举,并深入分析具体style.