如何在没有 root 的情况下可靠地模拟 Android 上的触摸事件（如 Automate 和 Tasker）？

Question

如何从作为后台服务运行的应用程序外部 Java 可靠地模拟 Android 上的触摸事件（无需 root）？

虽然之前有人问过这个问题，大多数答案都使用 ADB。（比如How to simulate touch events on Android device?）

https://github.com/chetbox/android-mouse-cursor 使用辅助功能提供了一个很好的解决方案，但不是很可靠，因为并非所有视图都会响应它，而且游戏在大多数情况下根本不会响应。

private void click() {
  AccessibilityNodeInfo nodeInfo = getRootInActiveWindow();
  if (nodeInfo == null) return;

  AccessibilityNodeInfo nearestNodeToMouse = findSmallestNodeAtPoint(nodeInfo, cursorLayout.x, cursorLayout.y + 50);

  if (nearestNodeToMouse != null) {
    logNodeHierachy(nearestNodeToMouse, 0);
    nearestNodeToMouse.performAction(AccessibilityNodeInfo.ACTION_CLICK);
  }

  nodeInfo.recycle();
}

This is the current code used by https://github.com/chetbox/android-mouse-cursor.

Android版本为8.0，现货Android

是否有更好、更可靠的方法来模拟来自 Java 的这些触摸事件？提前致谢！

Answer 1

如建议的那样，自牛轧糖 (API 24) 以来模拟触摸事件的最佳方法是使用无障碍服务和 AccessibilityService#dispatchGesture 方法。

这是我模拟单击事件的方法。

// (x, y) in screen coordinates
private static GestureDescription createClick(float x, float y) {
    // for a single tap a duration of 1 ms is enough
    final int DURATION = 1;

    Path clickPath = new Path();
    clickPath.moveTo(x, y);
    GestureDescription.StrokeDescription clickStroke =
            new GestureDescription.StrokeDescription(clickPath, 0, DURATION);
    GestureDescription.Builder clickBuilder = new GestureDescription.Builder();
    clickBuilder.addStroke(clickStroke);
    return clickBuilder.build();
}

// callback invoked either when the gesture has been completed or cancelled
callback = new AccessibilityService.GestureResultCallback() {
    @Override
    public void onCompleted(GestureDescription gestureDescription) {
        super.onCompleted(gestureDescription);
        Log.d(TAG, "gesture completed");
    }

    @Override
    public void onCancelled(GestureDescription gestureDescription) {
        super.onCancelled(gestureDescription);
        Log.d(TAG, "gesture cancelled");
    }
};

// accessibilityService: contains a reference to an accessibility service
// callback: can be null if you don't care about gesture termination
boolean result = accessibilityService.dispatchGesture(createClick(x, y), callback, null);
Log.d(TAG, "Gesture dispatched? " + result);

要执行其他手势，您可能会发现 code used for testing AccessibilityService#dispatchGesture 实现很有用。

编辑：我 link 在我的博客中有一个 post introduction to Android accessibility services。

如何在没有 root 的情况下可靠地模拟 Android 上的触摸事件（如 Automate 和 Tasker）？

How can I reliably simulate touch events on Android without root (like Automate and Tasker)?

java

android

accessibilityservice

android-8.0-oreo