android 修改statusbar（一）添加home back menu键

转自:   http://blog.csdn.net/dahuaishu2010_/article/details/7817733

由于完全改了status bar，建议先做几张png图片，加到

Frameworks/base/core/res/res/drawable
下。最好做一张背景图，替换 statusbar_background.png


另外我又加了几张icon，分别是home menu和back的正常和按下状态。


这些图片为：
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


修改步骤为：


一．修改xml界面
1.创建按钮
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
基结构如下：
<?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. 增加图标
更改整个status bar，我的方法是：
修改status bar的layerout文件：
Frameworks/base/core/res/res/layout/status_bar.xml
在原来的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>
这样做的好处就是简单。同时保证home、menu、back按钮，不受它本来的约束。这样status bar上即可看到这些按钮了。
图标的位置，可通过修改 paddingRight， paddingLeft 和paddingTop的值达到最佳视觉效果。


3. 修改status bar的高度。
既然要在status bar上增加那么几个按钮，当然是想要使用触摸操作的，android自带的status bar高度太小，不适用。对于7寸屏的话，50pixel的高度应该是差不多了。
修改高度很简单，修改frameworks/base/core/res/res/values/dimens.xml的status_bar_height属性
    <!-- Height of the status bar -->
    <dimen name="status_bar_height">50dip</dimen>


也可以更改状态栏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"    >


当然，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


编译运行一下：




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


看状态栏是不是改变了？




二 为按钮添加模拟按键
修改frameworks\base\services\java\com\android\server\status\StatusBarView.java


1.添加各个图片按钮的引用，
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()函数，各个图片ID在上面的status_bar.xml中已经定义
@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.添加各个按钮的事件监听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.添加模拟按键处理
/* 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.避免在按下这几个按钮时，触发下拉Notification视图，影响性能
修改onInterceptTouchEvent(MotionEvent event)函数
@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 */
}


这样，基本上就完成了。


编译一下


~/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