android 修改statusbar(一)添加home back menu鍵

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由於完全改了status bar,建議先做幾張png圖片,加到

Frameworks/base/core/res/res/drawable
下。最好做一張背景圖,替換 statusbar_background.png

另外我又加了幾張icon,分別是home menu和back的正常和按下狀態。

這些圖片為:
frameworks\base\core\res\res\drawable\ic_menu_back_pressed.png
frameworks\base\core\res\res\drawable\ic_menu_home_pressed.png
frameworks\base\core\res\res\drawable\ic_menu_more_pressed.png
frameworks\base\core\res\res\drawable\ic_volume_down_pressed.png
frameworks\base\core\res\res\drawable\ic_volume_up_pressed.png
frameworks\base\core\res\res\drawable\ic_menu_back.png
frameworks\base\core\res\res\drawable\ic_menu_home.png
frameworks\base\core\res\res\drawable\ic_menu_more.png
frameworks\base\core\res\res\drawable\ic_volume_down.png
frameworks\base\core\res\res\drawable\ic_volume_up.png

修改步驟為:

一.修改xml介面
1.建立按鈕
frameworks\base\core\res\res\drawable\btn_sbicon_back.xml
frameworks\base\core\res\res\drawable\btn_sbicon_home.xml
frameworks\base\core\res\res\drawable\btn_sbicon_menu.xml
frameworks\base\core\res\res\drawable\btn_sbicon_vol_down.xml
frameworks\base\core\res\res\drawable\btn_sbicon_vol_up.xml
基結構如下:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android ">
    <item android:state_pressed="true" android:drawable="@drawable/ic_menu_back_pressed" />
    <item android:state_pressed="false" android:drawable="@drawable/ic_menu_back" />
</selector>

2. 增加表徵圖
更改整個status bar,我的方法是:
修改status bar的layerout檔案:
Frameworks/base/core/res/res/layout/status_bar.xml
在原來的linearlayout中新增 image view

<?xml version="1.0" encoding="utf-8"?>
<com.android.server.status.StatusBarView xmlns:android="http://schemas.android.com/apk/res/android " 
    android:background="@drawable/statusbar_background"
    android:orientation="vertical"
    android:focusable="true"
    android:descendantFocusability="afterDescendants"
    >
    <LinearLayout android:id="@+id/keys"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:orientation="horizontal">
     <ImageView android:id="@+id/status_home" 
      android:layout_width="40dip" 
      android:layout_height="40dip"
      android:clickable="true"
      android:layout_gravity="top" 
      android:paddingTop="1dip" 
      android:paddingRight="1dip" 
      android:paddingLeft="1dip" 
      android:src="@drawable/btn_sbicon_home" /> 
     <ImageView android:id="@+id/status_back" 
      android:layout_width="40dip" 
      android:layout_height="40dip"
      android:clickable="true"
      android:layout_gravity="top" 
      android:paddingTop="1dip" 
      android:paddingRight="1dip" 
      android:paddingLeft="1dip" 
      android:src="@drawable/btn_sbicon_back" /> 
     <ImageView android:id="@+id/status_menu" 
      android:layout_width="40dip" 
      android:layout_height="40dip" 
      android:clickable="true"
      android:layout_gravity="top" 
      android:paddingTop="1dip" 
      android:paddingRight="1dip" 
      android:paddingLeft="1dip" 
      android:src="@drawable/btn_sbicon_menu" /> 
     <ImageView android:id="@+id/status_vol_down" 
      android:layout_width="40dip" 
      android:layout_height="40dip" 
      android:clickable="true"
      android:layout_gravity="top" 
      android:paddingTop="1dip" 
      android:paddingRight="1dip" 
      android:paddingLeft="1dip" 
      android:src="@drawable/btn_sbicon_vol_down" /> 
     <ImageView android:id="@+id/status_vol_up" 
      android:layout_width="40dip" 
      android:layout_height="40dip" 
      android:clickable="true"
      android:layout_gravity="top" 
      android:paddingTop="1dip" 
      android:paddingRight="1dip" 
      android:paddingLeft="1dip" 
      android:src="@drawable/btn_sbicon_vol_up" /> 
    </LinearLayout>
   ......
</com.android.server.status.StatusBarView>
這樣做的好處就是簡單。同時保證home、menu、back按鈕,不受它本來的約束。這樣status bar上即可看到這些按鈕了。
表徵圖的位置,可通過修改 paddingRight, paddingLeft 和paddingTop的值達到最佳視覺效果。

3. 修改status bar的高度。
既然要在status bar上增加那麼幾個按鈕,當然是想要使用觸摸操作的,android內建的status bar高度太小,不適用。對於7寸屏的話,50pixel的高度應該是差不多了。
修改高度很簡單,修改frameworks/base/core/res/res/values/dimens.xml的status_bar_height屬性
    <!-- Height of the status bar -->
    <dimen name="status_bar_height">50dip</dimen>

也可以更改狀態列Icon的大小,frameworks\base\core\res\res\layout\status_bar_icon.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android " 
    android:layout_width="25dp" 
    android:layout_height="25dp"    >

當然,如果相改title的高度,可以修改 Frameworks/base/core/res/res/values/themes.xml中的Window attributes的windowTitleSize值

編譯運行一下:

~/donut$ source ./env.sh   
~/donut$ make –j8   
~/donut$ emulator –skin WVGA800 
~/donut$ source ./env.sh
~/donut$ make –j8
~/donut$ emulator –skin WVGA800

看狀態列是不是改變了?

二 為按鈕添加類比按鍵
修改frameworks\base\services\java\com\android\server\status\StatusBarView.java

1.添加各個圖片按鈕的引用,
android.widget.LinearLayout keysLayout;
android.widget.ImageView btnHome;
android.widget.ImageView btnBack;
android.widget.ImageView btnMenu;
android.widget.ImageView btnVolUp;
android.widget.ImageView btnVolDown;

2.修改onFinishInflate()函數,各個圖片ID在上面的status_bar.xml中已經定義
@Override
protected void onFinishInflate() {
   ......    
    /* Begin : Added by TigerPan */
    keysLayout = (android.widget.LinearLayout)findViewById(R.id.keys);
    btnHome = (android.widget.ImageView)findViewById(R.id.status_home);
    btnBack = (android.widget.ImageView)findViewById(R.id.status_back);
    btnMenu = (android.widget.ImageView)findViewById(R.id.status_menu);
    btnVolUp = (android.widget.ImageView)findViewById(R.id.status_vol_up);
    btnVolDown = (android.widget.ImageView)findViewById(R.id.status_vol_down);
    btnHome.setOnClickListener(mKeysListener);
    btnBack.setOnClickListener(mKeysListener);
    btnMenu.setOnClickListener(mKeysListener);
    btnVolUp.setOnClickListener(mKeysListener);
    btnVolDown.setOnClickListener(mKeysListener);
    /* End : Added by TigerPan */
}

3.添加各個按鈕的事件監聽Listener
android.view.View.OnClickListener mKeysListener = new android.view.View.OnClickListener(){
public void onClick(View v) {
switch (v.getId()) {
case R.id.status_home:
   mKeysHandler.sendEmptyMessage(KEY_HOME);
   break;
case R.id.status_back:
   mKeysHandler.sendEmptyMessage(KEY_BACK);
   break;
case R.id.status_menu:
   mKeysHandler.sendEmptyMessage(KEY_MENU);
   break;
case R.id.status_vol_up:
   mKeysHandler.sendEmptyMessage(KEY_VOL_UP);
   break;
case R.id.status_vol_down:
   mKeysHandler.sendEmptyMessage(KEY_VOL_DOWN);
   break;
default:
   break;
}
}};

4.添加類比按鍵處理
/* Begin : ADDED by TigerPan 20100831 */
private static final int KEY_HOME = 1000;
private static final int KEY_BACK = 1001;
private static final int KEY_MENU = 1002;
private static final int KEY_VOL_UP = 1003;
private static final int KEY_VOL_DOWN = 1004;
private Handler mKeysHandler = new Handler(){
public void handleMessage(Message msg) {
   switch (msg.what) {
case KEY_HOME:
   sendKey(KeyEvent.KEYCODE_HOME);
   break;
case KEY_BACK:
   sendKey(KeyEvent.KEYCODE_BACK);
   break;
case KEY_MENU:
   sendKey(KeyEvent.KEYCODE_MENU);
   break;
case KEY_VOL_UP:
   ((android.media.AudioManager)mContext.getSystemService(Context.AUDIO_SERVICE))
   .adjustVolume(android.media.AudioManager.ADJUST_RAISE, android.media.AudioManager.STREAM_MUSIC);
   break;
case KEY_VOL_DOWN:
   ((android.media.AudioManager)mContext.getSystemService(Context.AUDIO_SERVICE))
   .adjustVolume(android.media.AudioManager.ADJUST_LOWER, android.media.AudioManager.STREAM_MUSIC);
   break;
default:
   break;
}
}

private void sendKey(int keyCode) {
long now = SystemClock.uptimeMillis();
long n = System.currentTimeMillis();
Log.d("Tiger", "Intent.ACTION_SOFT_"+keyCode+"_PRESSED   0="+n);
try {
   KeyEvent down = new KeyEvent(now, now, KeyEvent.ACTION_DOWN, keyCode, 0);
   KeyEvent up = new KeyEvent(now, now, KeyEvent.ACTION_UP, keyCode, 0);
   Log.d("Tiger", "Intent.ACTION_SOFT_"+keyCode+"_PRESSED   1="+(System.currentTimeMillis()/*-n*/));
   IWindowManager wm = IWindowManager.Stub.asInterface(ServiceManager.getService("window"));
   Log.d("Tiger", "Intent.ACTION_SOFT_"+keyCode+"_PRESSED   2="+(System.currentTimeMillis()/*-n*/));
   wm.injectKeyEvent(down, false);
   Log.d("Tiger", "Intent.ACTION_SOFT_"+keyCode+"_PRESSED   3="+(System.currentTimeMillis()/*-n*/));
   wm.injectKeyEvent(up, false);
   Log.d("Tiger", "Intent.ACTION_SOFT_"+keyCode+"_PRESSED   4="+(System.currentTimeMillis()/*-n*/));
} catch (RemoteException e) {
   Log.i("Input", "DeadOjbectException");
}
}
};
/* End : ADDED by TigerPan 20100831 */

5.避免在按下這幾個按鈕時,觸發下拉Notification視圖,影響效能
修改onInterceptTouchEvent(MotionEvent event)函數
@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
/* Begin : Modified by TigerPan */
if (keysLayout.getRight() < event.getX())
   return mService.interceptTouchEvent(event) ? true : super.onInterceptTouchEvent(event);
/*int parentLeft = mStatusIcons.getLeft();
android.util.Log.i("Tiger","....."+(event.getX() < (parentLeft + iconVolDown.getLeft()) || event.getX() > (parentLeft + iconHome.getRight())));
if(event.getX() < (parentLeft + iconVolDown.getLeft()) || event.getX() > (parentLeft + iconHome.getRight()))
   return mService.interceptTouchEvent(event) ? true : super.onInterceptTouchEvent(event);
*/
return false;
/* End : Modified by TigerPan */
}

這樣,基本上就完成了。

編譯一下

~/donut$ source ./env.sh   
~/donut$ make update-api   
~/donut$ make –j8   
~/donut$ emulator –skin WVGA800 
~/donut$ source ./env.sh
~/donut$ make update-api
~/donut$ make –j8
~/donut$ emulator –skin WVGA800

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