导航键或手势导航注入事件

Posted 2021-09-22 xhBruce

导航键或手势导航注入事件

IMS:injectInputEvent注入Input事件

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SystemUI注入

先搜一波 injectInputEvent ：
frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/policy/KeyButtonView.java
frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/EdgeBackGestureHandler.java
frameworks/base/packages/SystemUI/src/com/android/systemui/accessibility/SystemActions.java

KeyEvent.KEYCODE_HOME: 3
KeyEvent.KEYCODE_BACK: 4
KeyEvent.KEYCODE_APP_SWITCH: 187

public static final int INJECT_INPUT_EVENT_MODE_ASYNC = 0; // see InputDispatcher.h

InputManagerService中调用

frameworks/base/services/core/java/com/android/server/input/InputManagerService.java

• INJECT_INPUT_EVENT_MODE_ASYNC 继续执行
  
  int FLAG_DISABLE_KEY_REPEAT = 0x08000000;

InputDispatcher::injectInputEvent 调用

• 日志injectInputEvent中Binder.getCallingPid()、Binder.getCallingUid()
• FLAG_DISABLE_KEY_REPEAT & POLICY_FLAG_FILTERED = 0x08000000 & 0x04000000 = 0；进入interceptKeyBeforeQueueing
• mLooper->wake()唤醒InputDispatcher

// Indicates that the input event has passed through an input filter.
POLICY_FLAG_FILTERED = 0x04000000,