SystemUI添加耳机图标

Google原生的系统在状态栏的图标里并没用耳机的图标，我们可以根据其他服务的图标的写法，来自己添加这个新功能。

如图所示：



系统状态栏要显示的图标，都会在Framework/base/core/res/res/values的两个xml文件里添加图标要显示的位置信息。

config.xml：

<!-- Component to be used as the status bar service.  Must implement the IStatusBar
interface.  This name is in the ComponentName flattened format (package/class)  -->
<string name="config_statusBarComponent">com.android.systemui/com.android.systemui.statusbar.StatusBarService</string>

<!-- Do not translate. Defines the slots for the right-hand side icons.  That is to say, the
icons in the status bar that are not notifications. -->
<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>
<!--耳机图标ID -->
<item><xliff:g id="id">headset</xliff:g></item>
<!-- 耳机图标ID -->
<item><xliff:g id="id">mute</xliff:g></item>
<item><xliff:g id="id">volume</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">no_sim_card2</xliff:g></item>
<item><xliff:g id="id">phone_signal_second_sub</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">no_sim_card1</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>

arrays.xml里

<!-- Do not translate. Defines the slots for the right-hand side icons.  That is to say, the
icons in the status bar that are not notifications. -->
<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</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">phone_signal_second_sub</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>
<!--耳机图标Id -->
<item><xliff:g id="id">headset</xliff:g></item>
<!-- 耳机图标Id -->
<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>

然后在drawable里添加耳机图片，耳机大小不能超过25*25，否则会出现显示被压缩的。

系统所有的图标控制显示都是在SystemUI的StatusBarPolicy.java文件里

在这里添加服务和广播，监听耳机插拔的事件

private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (action.equals(Intent.ACTION_BATTERY_CHANGED)) {
updateBattery(intent);
}
else if (action.equals(Intent.ACTION_ALARM_CHANGED)) {
updateAlarm(intent);
//耳机广播
}else if(action.equals(Intent.ACTION_HEADSET_PLUG)){
updateHeadset(intent);
//耳机广播
}else if (action.equals(Intent.ACTION_SYNC_STATE_CHANGED)) {
updateSyncState(intent);
}
else if (action.equals(Intent.ACTION_BATTERY_LOW)) {
onBatteryLow(intent);
}
else if (action.equals(Intent.ACTION_BATTERY_OKAY)
|| action.equals(Intent.ACTION_POWER_CONNECTED)) {
onBatteryOkay(intent);
}
else if (action.equals(BluetoothAdapter.ACTION_STATE_CHANGED) ||
action.equals(BluetoothHeadset.ACTION_STATE_CHANGED) ||
action.equals(BluetoothA2dp.ACTION_SINK_STATE_CHANGED) ||
action.equals(BluetoothPbap.PBAP_STATE_CHANGED_ACTION)) {
updateBluetooth(intent);
}
else if (action.equals(WifiManager.NETWORK_STATE_CHANGED_ACTION) ||
action.equals(WifiManager.WIFI_STATE_CHANGED_ACTION) ||
action.equals(WifiManager.RSSI_CHANGED_ACTION)) {
updateWifi(intent);
}
else if (action.equals(LocationManager.GPS_ENABLED_CHANGE_ACTION) ||
action.equals(LocationManager.GPS_FIX_CHANGE_ACTION)) {
updateGps(intent);
}
else if (action.equals(AudioManager.RINGER_MODE_CHANGED_ACTION) ||
action.equals(AudioManager.VIBRATE_SETTING_CHANGED_ACTION)) {
updateVolume();
}
else if (action.equals(TelephonyIntents.ACTION_SIM_STATE_CHANGED)) {
updateSimState(intent);
}
else if (action.equals(TtyIntent.TTY_ENABLED_CHANGE_ACTION)) {
updateTTY(intent);
}
else if (action.equals(ConnectivityManager.CONNECTIVITY_ACTION) ||
action.equals(ConnectivityManager.INET_CONDITION_ACTION)) {
// TODO - stop using other means to get wifi/mobile info
updateConnectivity(intent);
}
else if (action.equals(WimaxManagerConstants.WIMAX_ENABLED_STATUS_CHANGED) ||
action.equals(WimaxManagerConstants.SIGNAL_LEVEL_CHANGED_ACTION) ||
action.equals(WimaxManagerConstants.WIMAX_STATE_CHANGED_ACTION)) {
updateWiMAX(intent);
}
}
};

然后在初始化StatusBarPolicy里加入服务 public StatusBarPolicy(Context context)

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

自定义类：

//耳机图标显示控制
private final void updateHeadset(Intent intent) {
final String action = intent.getAction();
if (action.equals(Intent.ACTION_HEADSET_PLUG)) {
int state = intent.getIntExtra("state", 0);
if (state == 1) {
mService.setIconVisibility("headset", true);
} else {
mService.setIconVisibility("headset", false);
}
}
}

这样就可以在系统状态栏里显示耳机的图标了，当然底层也要有这个广播发送。