TV测试中的按键长按操作模拟

从UiAutomator在TV测试中的局限性说起：

智能TV的操作和手机的操作有很大不同，一般智能TV的操作为遥控器按键操作，来向TV OS发送  KeyCode，以完成指定操作。

UiAutomator在API中提供了控件和长按操作，也提供了点坐标的长按操作，但无法设置长按的时间。

UiAutomator在API中也提供了模拟发送KeyCode的方法，即UiDevice类中的pressKeyCode方法。

但TV遥控器按键的长按模拟方法，UiAutomator并没有直接提供，而电视中的视频快进等操作需要按         键长按，自动化测试有此方面的要求。

一.   KeyCode按键长按操作通过Adb命令模拟

COMMAND:               adb shell input keyevent --longpress 3

虽然可以实现长按操作，但长按只能实现简单的长按操作，长按时间较短，针对快进等需较长时间长按实现的操作无用。

二.   Appium的KeyCode长按模拟

Appium里面实现了按键的长按操作，实现源码核心如下：

public AndroidCommandResult execute(final AndroidCommand command)
      throws JSONException {
    try {
      InteractionController interactionController = UiAutomatorBridge.getInstance().getInteractionController();

      final Hashtable<String, Object> params = command.params();
      keyCode = (Integer) params.get("keycode");
      metaState = params.get("metastate") != JSONObject.NULL ? (Integer) params
          .get("metastate") : 0;
      final long eventTime = SystemClock.uptimeMillis();
      // Send an initial down event
      final KeyEvent downEvent = new KeyEvent(eventTime, eventTime,
          KeyEvent.ACTION_DOWN, keyCode, 0, metaState,
          KeyCharacterMap.VIRTUAL_KEYBOARD, 0, 0, InputDevice.SOURCE_KEYBOARD);
      if (interactionController.injectEventSync(downEvent)) {
        // Send a repeat event. This will cause the FLAG_LONG_PRESS to be set.
        final KeyEvent repeatEvent = KeyEvent.changeTimeRepeat(downEvent,
            eventTime, 1);
        interactionController.injectEventSync(repeatEvent);
        // Finally, send the up event
        final KeyEvent upEvent = new KeyEvent(eventTime, eventTime,
            KeyEvent.ACTION_UP, keyCode, 0, metaState,
            KeyCharacterMap.VIRTUAL_KEYBOARD, 0, 0, InputDevice.SOURCE_KEYBOARD);
        interactionController.injectEventSync(upEvent);
      }
      return getSuccessResult(true);
    } catch (final Exception e) {
      return getErrorResult(e.getMessage());
    }
  }

核心主要是：injectEventSync方法,剖析其源码发现最终是调用了uiautomator JAR包中                         com.android.uiautomator.core.InteractionController类的injectEventSync方法

只是在uiautomator JAR包中，上述类类型为default且上述方法private方法

若要调用需要使用反射技术

三.   自己实现的时间可控的长按操作模拟源码

public void execute(int keycode, int times) {

	int keyCode = keycode;
	int timeCount = times;
    try {
    // InteractionController interactionController = UiAutomatorBridge.getInstance().getInteractionController();
    	System.out.println("......ttt....");

      UiDevice device = UiDevice.getInstance();

      Class UiDevice_class = UiDevice.class;
      Field field_UiD = UiDevice_class.getDeclaredField("mUiAutomationBridge");
      field_UiD.setAccessible(true);
      Object uiAutomatorBridge  =  field_UiD.get(device);

      Class tmp = Class.forName("com.android.uiautomator.core.UiAutomatorBridge");
      Field field = tmp.getDeclaredField("mInteractionController");
      field.setAccessible(true);
      Object interactionController = field.get(uiAutomatorBridge);

      metaState = 0;
      final long eventTime = SystemClock.uptimeMillis();
      // Send an initial down event
      final KeyEvent downEvent = new KeyEvent(eventTime, eventTime,
          KeyEvent.ACTION_DOWN, keyCode, 0, metaState,
          KeyCharacterMap.VIRTUAL_KEYBOARD, 0, 0, InputDevice.SOURCE_KEYBOARD);
      System.out.println("......lll,....");
      if (injectEventSync(downEvent,interactionController)) {
        // Send a repeat event. This will cause the FLAG_LONG_PRESS to be set.
        final KeyEvent repeatEvent = KeyEvent.changeTimeRepeat(downEvent,
            eventTime, 1);
       for(int i=0; i<timeCount; i++){

    	   injectEventSync(repeatEvent,interactionController);

       }

        // Finally, send the up event
        System.out.println("......lll,....");
        final KeyEvent upEvent = new KeyEvent(eventTime, eventTime,
            KeyEvent.ACTION_UP, keyCode, 0, metaState,
            KeyCharacterMap.VIRTUAL_KEYBOARD, 0, 0, InputDevice.SOURCE_KEYBOARD);
        injectEventSync(upEvent,interactionController);

      }
      return ;
    } catch (final Exception e) {
      return ;
    }
  }