对在Android的状态栏添加Menu，Back，Home的改进

在状态栏上添加Menu,Back,Home三个按钮的方法，在下文有良好的阐述。详见：

《在android的状态栏(statusbar)中增加menu，home和back快捷键的方法》http://blog.csdn.net/freshui/archive/2010/07/15/5738115.aspx

在使用过程中，存在两个问题：

HOME键在我的机器上无效
连击按钮时，由于有时Intent未响应，导致弹起操作未响应直接诶被WindowsManager抛掉。这样就出现了虽然手已离开屏幕，但按钮出现高亮的状态。

1、对于第一个问题，我的方法是把home键单独进行处理，向launcher发送一个启动activity的Intent，这样可以直接回到桌面上。在原方法的基础上,对Home单独进行处理。

1 if (RESV_KEY_HOME = = mResvKeyCode)
2 {
3 Log . d(TAG, " HOME button Intent! " );
4 Intent intent = new Intent(Intent . ACTION_MAIN);
5 intent . setFlags(Intent . FLAG_ACTIVITY_NEW_TASK);
6 intent . addCategory(Intent . CATEGORY_HOME);
7 mService . sendIntent2(intent);
8 }
9 else
10 {
11 Log . d(TAG, " other two buttons Intent! " );
12 Intent intent = new Intent(Intent . ACTION_ICONKEY_CHANGED);
13 intent . addFlags(Intent . FLAG_RECEIVER_REGISTERED_ONLY);
14 intent . putExtra( " keycode " , mResvKeyCode);
15 mService . sendIntent(intent);
16 }

在StatusBarService.java中添加sendIntent2方法

1 void sendIntent2(Intent intent)
2 {
3 mContext . startActivity(intent);
4 }

2、第二个问题的修正思想是使用Animation逐帧动画来使得按钮从完成正常态按下后-变化至高亮态-恢复正常态这一周期。

a. 先在res/layout（与status_bar.xml同目录）中添加三个animation动画xml配置文件。

分别是

animation_home.xml：

1 < ?xml version = " 1.0 " encoding = " utf-8 " ? >
2 < animation-list xmlns:android = " http://schemas.android.com/apk/res/android "
3 android:oneshot = " true " >
4 < item
5 android:duration = " 80 "
6 android:drawable = " @drawable/stat_home " >
7 < /item >
8 < item
9 android:duration = " 80 "
10 android:drawable = " @drawable/stat_home_pressed " >
11 < /item >
12 < item
13 android:duration = " 80 "
14 android:drawable = " @drawable/stat_home " >
15 < /item >
16 < /animation-list >

animation_back.xml：

1 < ?xml version = " 1.0 " encoding = " utf-8 " ? >
2 < animation-list xmlns:android = " http://schemas.android.com/apk/res/android "
3 android:oneshot = " true " >
4 < item
5 android:duration = " 80 "
6 android:drawable = " @drawable/stat_back " >
7 < /item >
8 < item
9 android:duration = " 80 "
10 android:drawable = " @drawable/stat_back_pressed " >
11 < /item >
12 < item
13 android:duration = " 80 "
14 android:drawable = " @drawable/stat_back " >
15 < /item >
16 < /animation-list >
17
18
19

animation_menu.xml：

1 < ?xml version = " 1.0 " encoding = " utf-8 " ? >
2 < animation-list xmlns:android = " http://schemas.android.com/apk/res/android "
3 android:oneshot = " true " >
4 < item
5 android:duration = " 80 "
6 android:drawable = " @drawable/stat_menu " >
7 < /item >
8 < item
9 android:duration = " 80 "
10 android:drawable = " @drawable/stat_menu_pressed " >
11 < /item >
12 < item
13 android:duration = " 80 "
14 android:drawable = " @drawable/stat_menu " >
15 < /item >
16 < /animation-list >
17
18

这三个xml文件分别对应着 home back menu的动画过程

b . 在res/layout/status_bar.xml中修改Imageview的background指向上述三个xml配置文件：

1 < ?xml version = " 1.0 " encoding = " utf-8 " ? >
2 
3 < com.android.server.status.StatusBarView xmlns:android = " http://schemas.android.com/apk/res/android "
4 android:background = " @drawable/statusbar_background "
5 android:orientation = " vertical "
6 android:focusable = " true "
7 android:descendantFocusability = " afterDescendants "
8 >
9
10 < LinearLayout android:id = " @+id/icons "
11 android:layout _width= " fill_parent "
12 android:layout _height= " fill_parent "
13 android:orientation = " horizontal " >
14 
15 < ImageView
16 android:id = " @+id/status_home "
17 android:layout _width= " wrap_content "
18 android:layout _height= " wrap_content "
19 android:layout _gravity= " top "
20 android:background = " @layout/animation_home "
21 / >
22 
23
24 < com.android.server.status.IconMerger android:id = " @+id/notificationIcons "
25 android:layout _width= " 0dip "
26 android:layout _weight= " 1 "
27 android:layout _height= " fill_parent "
28 android:layout _alignParentLeft= " true "
29 android:paddingLeft = " 6dip "
30 android:gravity = " center_vertical "
31 android:orientation = " horizontal " / >
32
33 < LinearLayout android:id = " @+id/statusIcons "
34 android:layout _width= " wrap_content "
35 android:layout _height= " fill_parent "
36 android:layout _alignParentRight= " true "
37 android:paddingRight = " 6dip "
38 android:gravity = " center_vertical "
39 android:orientation = " horizontal " / >
40 
41 < ImageView
42 android:id = " @+id/status_menu "
43 android:layout _width= " wrap_content "
44 android:layout _height= " wrap_content "
45 android:layout _gravity= " top "
46 android:background = " @layout/animation_menu "
47 / >
48
49 < ImageView
50 android:id = " @+id/status_back "
51 android:layout _width= " wrap_content "
52 android:layout _height= " wrap_content "
53 android:layout _gravity= " top "
54 android:background = " @layout/animation_back "
55 / >
56 
57 < /LinearLayout >
58 < LinearLayout android:id = " @+id/ticker "
59 android:layout _width= " fill_parent "
60 android:layout _height= " fill_parent "
61 android:paddingLeft = " 6dip "
62 android:animationCache = " false "
63 android:orientation = " horizontal " >
64 < ImageSwitcher android:id = " @+id/tickerIcon "
65 android:layout _width= " wrap_content "
66 android:layout _height= " fill_parent "
67 android:layout _marginRight= " 8dip "
68 >
69 < com.android.server.status.AnimatedImageView
70 android:layout _width= " 25dip "
71 android:layout _height= " 25dip "
72 / >
73 < com.android.server.status.AnimatedImageView
74 android:layout _width= " 25dip "
75 android:layout _height= " 25dip "
76 / >
77 < /ImageSwitcher >
78 < com.android.server.status.TickerView android:id = " @+id/tickerText "
79 android:layout _width= " 0dip "
80 android:layout _weight= " 1 "
81 android:layout _height= " wrap_content "
82 android:paddingTop = " 2dip "
83 android:paddingRight = " 10dip " >
84 < TextView
85 android:layout _width= " fill_parent "
86 android:layout _height= " wrap_content "
87 android:singleLine = " true "
88 android:textColor = " #ff000000 " / >
89 < TextView
90 android:layout _width= " fill_parent "
91 android:layout _height= " wrap_content "
92 android:singleLine = " true "
93 android:textColor = " #ff000000 " / >
94 < /com.android.server.status.TickerView >
95 < /LinearLayout >
96
97 < com.android.server.status.DateView android:id = " @+id/date "
98 android:layout _width= " wrap_content "
99 android:layout _height= " fill_parent "
100 android:singleLine = " true "
101 android:textSize = " 16sp "
102 android:textStyle = " bold "
103 android:gravity = " center_vertical|left "
104 android:paddingLeft = " 6px "
105 android:paddingRight = " 6px "
106 android:textColor = " ?android:attr/textColorPrimaryInverse "
107 android:background = " @drawable/statusbar_background "
108 / >
109 < /com.android.server.status.StatusBarView >

c . 修改StatusBarView.java文件，加入Animation相关代码：

添加三个AnimationDrawable：

1 AnimationDrawable mHomeAnimation;
2 AnimationDrawable mBackAnimation;
3 AnimationDrawable mMenuAnimation;

在onFinishInflate()方法中

1 mHomeAnimation = (AnimationDrawable) mHomeIcon . getBackground();
2 mBackAnimation = (AnimationDrawable) mBackIcon . getBackground();
3 mMenuAnimation = (AnimationDrawable) mMenuIcon . getBackground();

updateResvKeyIcon这个方法，改造成如下这样：

1 private int updateResvKeyIcon( int key)
2 {
3 if (key = = RESV_KEY_BACK)
4 {
5 mBackAnimation . run();
6 }
7 else if (key = = RESV_KEY_HOME)
8 {
9 mHomeAnimation . run();
10 }
11 else if (key = = RESV_KEY_MENU)
12 {
13 mMenuAnimation . run();
14 }
15 return 0 ;
16 }

d. 注释掉所有的updateResvKeyIcon方法，仅保留以下一个，并加上判断语句。

1 i f(mResvKeyState = = - 1 ) // remembered key state, no reserve
2 {
3 switch (getResvKeyArea(event)) {
4 case RESV_KEY_HOME :
5 case RESV_KEY_BACK :
6 case RESV_KEY_MENU :
7 {
8 mResvKeyState = event . getAction();
9 mResvKeyCode = getResvKeyArea(event);
10 i f (mResvKeyState = = MotionEvent . ACTION_DOWN) updateResvKeyIcon(mResvKeyCode); // 这句改成这样附件下载如下：

http://download.csdn.net/source/2807668

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