Android 10 SystemUI 如何隐藏状态栏耳机图标和定位图标

代码路径：
frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBarPolicy.java
frameworks\base\core\res\res\values\config.xml
一、隐藏状态栏耳机图标
在PhoneStatusBarPolicy.java文件中注册广播，该广播中主要监听耳机是否插入、SIM卡的变化等

IntentFilter filter = new IntentFilter();
filter.addAction(AudioManager.RINGER_MODE_CHANGED_ACTION);
filter.addAction(AudioManager.INTERNAL_RINGER_MODE_CHANGED_ACTION);
filter.addAction(AudioManager.ACTION_HEADSET_PLUG);
filter.addAction(TelephonyIntents.ACTION_SIM_STATE_CHANGED);
filter.addAction(TelecomManager.ACTION_CURRENT_TTY_MODE_CHANGED);
filter.addAction(Intent.ACTION_MANAGED_PROFILE_AVAILABLE);
filter.addAction(Intent.ACTION_MANAGED_PROFILE_UNAVAILABLE);
filter.addAction(Intent.ACTION_MANAGED_PROFILE_REMOVED);
mContext.registerReceiver(mIntentReceiver, filter, null, mHandler);

在PhoneStatusBarPolicy.java文件中updateHeadsetPlug()中就是修改耳机图标的

private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        switch (action) {
            case AudioManager.RINGER_MODE_CHANGED_ACTION:
            case AudioManager.INTERNAL_RINGER_MODE_CHANGED_ACTION:
                updateVolumeZen();
                break;
            case TelephonyIntents.ACTION_SIM_STATE_CHANGED:
                // Avoid rebroadcast because SysUI is direct boot aware.
                if (intent.getBooleanExtra(TelephonyIntents.EXTRA_REBROADCAST_ON_UNLOCK,
                        false)) {
                    break;
                }
                updateSimState(intent);
                break;
            case TelecomManager.ACTION_CURRENT_TTY_MODE_CHANGED:
                updateTTY(intent.getIntExtra(TelecomManager.EXTRA_CURRENT_TTY_MODE,
                        TelecomManager.TTY_MODE_OFF));
                break;
            case Intent.ACTION_MANAGED_PROFILE_AVAILABLE:
            case Intent.ACTION_MANAGED_PROFILE_UNAVAILABLE:
            case Intent.ACTION_MANAGED_PROFILE_REMOVED:
                updateManagedProfile();
                break;
            case AudioManager.ACTION_HEADSET_PLUG:
                updateHeadsetPlug(intent);
                break;
        }
    }
};

private void updateHeadsetPlug(Intent intent) {
    boolean connected = intent.getIntExtra("state", 0) != 0;
    boolean hasMic = intent.getIntExtra("microphone", 0) != 0;
    if (connected) {
        String contentDescription = mContext.getString(hasMic
                ? R.string.accessibility_status_bar_headset
                : R.string.accessibility_status_bar_headphones);
        mIconController.setIcon(mSlotHeadset, hasMic ? R.drawable.stat_sys_headset_mic
                : R.drawable.stat_sys_headset, contentDescription);
        mIconController.setIconVisibility(mSlotHeadset, false);
    } else {
        /*UNISOC: Add for bug 1130932 {@ */
        AudioManager audioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
        if (!audioManager.isWiredHeadsetOn()) {
            mIconController.setIconVisibility(mSlotHeadset, false);
        }
        /* @} */
    }
}

二、状态栏隐藏定位位置图标
在PhoneStatusBarPolicy.java文件中onLocationActiveChanged()方法中监听定位开关是否打开和关闭

@Override
public void onLocationActiveChanged(boolean active) {
    updateLocation();
}

// Updates the status view based on the current state of location requests.
private void updateLocation() {
    if (mLocationController.isLocationActive()) {
        mIconController.setIconVisibility(mSlotLocation, false);
    } else {
        mIconController.setIconVisibility(mSlotLocation, false);
    }
}