添加自定义按键流程

一般来说上层添加以下几处修改

驱动层的键值上报，让驱动处理好即可

frameworks / base/core/java/android/view/KeyEvent.java

    public static final int KEYCODE_DEMO_APP_4 = 304;/** add by songhui for fingerprint Key code */+ public static final int KEYCODE_FINGER = 305;    /*** Integer value of the last KEYCODE. Increases as new keycodes are added to KeyEvent.* @hide*/@TestApi+  public static final int LAST_KEYCODE = KEYCODE_FINGER;//KEYCODE_DEMO_APP_4;  /** add by songhui for fingerprint Key code */

frameworks / base/core/api/current.txt

    field public static final int KEYCODE_FEATURED_APP_3 = 299; // 0x12bfield public static final int KEYCODE_FEATURED_APP_4 = 300; // 0x12c+ field public static final int KEYCODE_FINGER = 305; // 0x131field public static final int KEYCODE_FOCUS = 80; // 0