今天做了一个需求
手机需要做Back键和Home键不让唤醒屏幕
代码如下

KeyEvent.java(frameworks\base\core\java\android\view)

  /** @hide */
    public static final boolean isWakeKey(int keyCode) {
        switch (keyCode) {
            //chc hide back and menu wake 
           // case KeyEvent.KEYCODE_BACK:  
            case KeyEvent.KEYCODE_POWER:
          //  case KeyEvent.KEYCODE_MENU:
            case KeyEvent.KEYCODE_SLEEP:
            case KeyEvent.KEYCODE_WAKEUP:
            case KeyEvent.KEYCODE_PAIRING:
            case KeyEvent.KEYCODE_PTT:
                return true;
        }
        return false;
    }

PhoneWindowsManager.java

    private boolean isWakeKeyWhenScreenOff(int keyCode) {
        switch (keyCode) {
            // ignore volume keys unless docked
            case KeyEvent.KEYCODE_VOLUME_UP:
            case KeyEvent.KEYCODE_VOLUME_DOWN:
            case KeyEvent.KEYCODE_VOLUME_MUTE:
                return mDockMode != Intent.EXTRA_DOCK_STATE_UNDOCKED;

            // ignore media and camera keys
            case KeyEvent.KEYCODE_MUTE:
            case KeyEvent.KEYCODE_HEADSETHOOK:
            case KeyEvent.KEYCODE_MEDIA_PLAY:
            case KeyEvent.KEYCODE_MEDIA_PAUSE:
            case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE:
            case KeyEvent.KEYCODE_MEDIA_STOP:
            case KeyEvent.KEYCODE_MEDIA_NEXT:
            case KeyEvent.KEYCODE_MEDIA_PREVIOUS:
            case KeyEvent.KEYCODE_MEDIA_REWIND:
            case KeyEvent.KEYCODE_MEDIA_RECORD:
            case KeyEvent.KEYCODE_MEDIA_FAST_FORWARD:
            case KeyEvent.KEYCODE_MEDIA_AUDIO_TRACK:
            case KeyEvent.KEYCODE_CAMERA:
                return false;   //return false 就是不允许亮屏
        }
        return true;
    }

此方法是所有可以唤醒屏幕的按键
在此方法将对应的按键去掉的就行。

相反 如果需要某个按键需要唤醒屏幕， 在这两个方法添加到return true 就行了，并且确保驱动已经添加了按键的唤醒源，否则无法在深度待机下唤醒