监听耳机是否插入并在通知栏上显示图标

在android系统级服务启动中,状态栏右边的图标会被初始化,在左边一般显示动态的notification。这里我们要添加一个耳机插拔状态的图标,就应该放在右边,属于frameworks代码

在android2.3中

frameworks/base/core/res/res/drawable-mdpi             加入要显示的图标   status_sys_headset.png

frameworks/base/core/res/res/values/config.xml                                       加入耳机字符串标记(在下面用到)

<string-array name="config_statusBarIcons">
<item><xliff:g id="id">ime</xliff:g></item>
<item><xliff:g id="id">sync_failing</xliff:g></item>
<item><xliff:g id="id">sync_active</xliff:g></item>
<item><xliff:g id="id">gps</xliff:g></item>
<item><xliff:g id="id">bluetooth</xliff:g></item>
<item><xliff:g id="id">nfc</xliff:g></item>
<item><xliff:g id="id">tty</xliff:g></item>
<item><xliff:g id="id">speakerphone</xliff:g></item>
<item><xliff:g id="id">mute</xliff:g></item>
<item><xliff:g id="id">volume</xliff:g></item>

<item ><xliff:g id="id"> headset</xliff:g></item >

<item><xliff:g id="id">wifi</xliff:g></item>
<item><xliff:g id="id">cdma_eri</xliff:g></item>
<item><xliff:g id="id">data_connection</xliff:g></item>
<item><xliff:g id="id">phone_evdo_signal</xliff:g></item>
<item><xliff:g id="id">phone_signal</xliff:g></item>
<item><xliff:g id="id">battery</xliff:g></item>
<item><xliff:g id="id">alarm_clock</xliff:g></item>
<item><xliff:g id="id">secure</xliff:g></item>
<item><xliff:g id="id">clock</xliff:g></item>
</string-array>

frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/StatusBarPolicy.java          监听各个事件,处理状态栏图标变化。

模仿其他图标的添加:

private IBinder mHeadSetPlugIcon; 
private IconData mHeadSetPlugIconData;

在构造方法里: public StatusBarPolicy(Context context)

mService.setIcon("headset", R.drawable.status_sys_headset, 0);
mService.setIconVisibility("headset", false);

注册广播监听耳机:action tag可以在API文档中查找。

filter.addAction(Intent.ACTION_HEADSET_PLUG);

在广播接收onReceive(Context context, Intent intent) :

elseif (action.equals(Intent.ACTION_HEADSET_PLUG)) {
updateHeadset(intent);
}

定义方法改变耳机状态:

private void updateHeadset(Intent intent){

mService.setIconVisibility("headset", (intent.getIntExtra("state", 0) == 1 ) ? true : false)

 
 

}

下面时android2.3源码以前的版本添加方式。2.3以后这个已经放到应用中里:

 

1.在frameworks/base/core/res/res/drawable-mdpi      添加一个status_sys_headset.png。

2.修改frameworks/base/services/java/com/android/server/status/StatusBarPolicy.java

 

publicclass StatusBarPolicy { 
 privatestaticfinal String TAG ="StatusBarPolicy" ; 

 privatestatic StatusBarPolicy sInstance; 
..... 
 
 // alarm clock 
 // Icon lit when clock is set 
private IBinder mAlarmClockIcon; 
 private IconData mAlarmClockIconData; 

 //HeadSet 
private IBinder mHeadSetPlugIcon; 
 private IconData mHeadSetPlugIconData; 

..... 

 private BroadcastReceiver mIntentReceiver =new BroadcastReceiver() { 
@Override 
 publicvoid onReceive(Context context, Intent intent) { 
String action = intent.getAction(); 
 if (action.equals(Intent.ACTION_TIME_TICK)) { 
updateClock(); 
} 
..... 
 elseif (action.equals(Intent.ACTION_ALARM_CHANGED)) { 
updateAlarm(intent); 
} 
 elseif (action.equals(Intent.ACTION_HEADSET_PLUG)) { 
updateHeadset(intent); 
} 
 elseif (action.equals(Intent.ACTION_SYNC_STATE_CHANGED)) { 
updateSyncState(intent); 
} 
...... 
}; 
 private StatusBarPolicy(Context context, StatusBarService service) { 
mContext = context; 
mService = service; 
mSignalStrength =new SignalStrength(); 
 if                                   ==true ) { 
mSignalStrengthGemini =new SignalStrength(); 
} 
mBatteryStats = BatteryStatsService.getService(); 

 //HeadSet 
mHeadSetPlugIconData = IconData.makeIcon( 
 "headset" , 
 null ,com.android.internal.R.drawable.status_sys_headset, 0 , 0 ); 
mHeadSetPlugIcon = service.addIcon(mHeadSetPlugIconData, null ); 
service.setIconVisibility(mHeadSetPlugIcon, false ); 
.... 

IntentFilter filter =new IntentFilter(); 

 // Register for Intent broadcasts for... 
filter.addAction(Intent.ACTION_TIME_TICK); 
.... 
filter.addAction(Intent.ACTION_HEADSET_PLUG); 

.... 

} 

 privatefinalvoid updateHeadset(Intent intent) { 
mService.setIconVisibility(mHeadSetPlugIcon, (intent.getIntExtra("state" , 0 ) ==1 )?true :false); 
} 

}

3.frameworks/base/core/res/res/values/arrays.xml 加入字段

<string-array name ="status_bar_icon_order"> 
 <item ><xliff :g id ="id"> clock</xliff :g></item > 
 <item ><xliff :g id ="id"> secure</xliff :g></item > 
 <item ><xliff :g id ="id"> alarm_clock</xliff :g></item > 
 <item ><xliff :g id ="id"> battery</xliff :g></item > 
 <item ><xliff :g id ="id"> phone_signal_2</xliff :g></item > 
 <item ><xliff :g id ="id"> phone_signal</xliff :g></item > 
 <item ><xliff :g id ="id"> phone_evdo_signal</xliff :g></item > 
 <item ><xliff :g id ="id"> data_connection</xliff :g></item > 
 <item ><xliff :g id ="id"> cdma_eri</xliff :g></item > 
 <item ><xliff :g id ="id"> tty</xliff :g></item > 
 <item ><xliff :g id ="id"> volume</xliff :g></item > 
 <item ><xliff :g id ="id"> mute</xliff :g></item > 
 <item ><xliff :g id ="id"> speakerphone</xliff :g></item > 

 <item ><xliff :g id ="id"> headset</xliff :g></item > 

 <item ><xliff :g id ="id"> wifi</xliff :g></item > 
 <item ><xliff :g id ="id"> tty</xliff :g></item > 
 <item ><xliff :g id ="id"> bluetooth</xliff :g></item > 
 <item ><xliff :g id ="id"> gps</xliff :g></item > 
 <item ><xliff :g id ="id"> sync_active</xliff :g></item > 
 <item ><xliff :g id ="id"> sync_failing</xliff :g></item > 
 <item ><xliff :g id ="id"> ime</xliff :g></item > 
 </string-array >

 

到4.0后,需要修改的类是frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/PhoneStatusBarPolicy.java

方法同上。

 

  其中 “ headset这个字符串就是 “ mHeadSetPlugIconData = IconData.makeIcon( "headset" , null,

com.android.internal.R.drawable.status_sys_headset,0 ,0 );” 或者 mService.setIcon("headset", R.drawable.status_sys_headset, 0);中的第一个参数。“<item > <xliff :g id ="id"> headset</xliff :g> </item > ”这个语句的位置对应图标在状态栏上显示的位置顺序。

若是平板则修改:

1、首选在status_bar_notification_area.xml中加入一个ImageView空间显示图标。

2、在TabletStatusBar.java中获得上面的Imageviewnew一个HeadsetController.java并将View设置到该类中。

3、自己实现一个HeadsetController.java类(可以按照源码中其他xxController.java类一样设计),该类主要是注册监机拔插的接收广播,得到相应的状态将耳机图标显示出来。

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