Android Status bar添加耳机图标

1. 将耳机资源图片文件stat_sys_headset.png放到android/frameworks/base/packages/SystemUI/res/drawable-nodpi/
2. 修改android/frameworks/base/core/res/res/values/config.xml

                ime          volume          headset          wifi

3. 修改android\frameworks\base\packages\SystemUI\src\com\android\systemui\statusbar\phone\PhoneStatusBarPolicy.java

private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            String action = intent.getAction();            if (action.equals(Intent.ACTION_ALARM_CHANGED)) {                updateAlarm(intent);            }            else if (action.equals(Intent.ACTION_SYNC_STATE_CHANGED)) {                updateSyncState(intent);            }            ......

            //add start

            else if (action.equals(Intent.ACTION_HEADSET_PLUG)) {updateHeadset(intent);               }//zhanbing add end}

public PhoneStatusBarPolicy(Context context) {        mContext = context;        mService = (StatusBarManager)context.getSystemService(Context.STATUS_BAR_SERVICE);        // listen for broadcasts        IntentFilter filter = new IntentFilter();        filter.addAction(Intent.ACTION_ALARM_CHANGED);        filter.addAction(TtyIntent.TTY_ENABLED_CHANGE_ACTION);        ......

        filter.addAction(Intent.ACTION_HEADSET_PLUG);//zhanbing add        mContext.registerReceiver(mIntentReceiver, filter, null, mHandler);

        ......

        //headset zhanbing.li add        mService.setIcon("headset", R.drawable.stat_sys_headset, 0, null);        mService.setIconVisibility("headset", false);        //zhanbing modify here end

//modify here start

private final void updateHeadset(Intent intent) {        Slog.d(TAG, "updateHeadset: state=" + intent.getIntExtra("state", 0));        mService.setIconVisibility("headset", (intent.getIntExtra("state", 0) == 1)?true:false);

//modify here end

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