How to inject a touch event

[bpn2k4]

Hi, i follow Controller.java to inject a touch on screen. Here is my code :

import android.annotation.SuppressLint;
import android.os.SystemClock;
import android.view.InputEvent;
import android.view.MotionEvent;

import java.lang.reflect.Method;

@SuppressLint("PrivateApi,DiscouragedPrivateApi")
public class Touch {

  private Method injectInputEventMethod;
  private Object inputManagerInstance;

  public Touch() {
    try {
//      Class<?> inputManagerClass = Class.forName("android.hardware.input.InputManager");
      Class<?> inputManagerClass = android.hardware.input.InputManager.class;
      Method getInstanceMethod = inputManagerClass.getDeclaredMethod("getInstance");
      this.inputManagerInstance = getInstanceMethod.invoke(null);
      this.injectInputEventMethod = inputManagerInstance.getClass().getMethod("injectInputEvent", InputEvent.class, int.class);
      if (this.injectInputEventMethod == null) {
        System.out.println("Can't get injectInputEventMethod");
      }
      else {
        System.out.println("injectInputEventMethod: " + this.injectInputEventMethod.getName());
      }
    } catch (Exception e) {
      e.printStackTrace(System.out);
    }
  }

  public void touch() {
    try {
      float x = 640.0F;
      float y = 360.0F;
      System.out.println("Touch (" +  (int) x + ", " + (int) y + ")");

      final MotionEvent.PointerProperties[] pointerProperties = new MotionEvent.PointerProperties[1];
      pointerProperties[0] = new MotionEvent.PointerProperties();
      pointerProperties[0].toolType = MotionEvent.TOOL_TYPE_FINGER;

      final MotionEvent.PointerCoords[] pointerCoords = new MotionEvent.PointerCoords[1];
      pointerCoords[0] = new MotionEvent.PointerCoords();
      pointerCoords[0].orientation = 0.0F;
      pointerCoords[0].pressure = 1.0F;
      pointerCoords[0].x = x;
      pointerCoords[0].y = y;

      long downTime = SystemClock.uptimeMillis();
      MotionEvent motionEventDown = MotionEvent.obtain(downTime, downTime, MotionEvent.ACTION_DOWN, 1, pointerProperties, pointerCoords, 0, 0, 1f, 1f, 0, 0, 4098, 0);
      boolean result = (boolean) this.injectInputEventMethod.invoke(this.inputManagerInstance, motionEventDown, 0);
      System.out.println("[Debug] injectTouch result=" + result);

      long eventTime = SystemClock.uptimeMillis();
      MotionEvent motionEventUp = MotionEvent.obtain(downTime, eventTime, MotionEvent.ACTION_UP, 1, pointerProperties, pointerCoords, 0, 0, 1f, 1f, 0, 0, 4098, 0);
      result = (boolean) this.injectInputEventMethod.invoke(this.inputManagerInstance, motionEventUp, 0);
      System.out.println("[Debug] injectTouch result=" + result);
    }
    catch (Exception e) {
      System.out.println("Can't not touch");
      e.printStackTrace(System.out);
    }
  }
}

Then i call it:

Touch touch = new Touch();
touch.touch();

But nothing happen, here is the log:

D:\tutorial\server>adb -s emulator-5554 shell CLASSPATH=/data/local/tmp/app.jar app_process / com.capture.Main
injectInputEventMethod: injectInputEvent
Touch (640, 360)
[Debug] injectTouch result=false
[Debug] injectTouch result=false

My emulator is LDPlayer using android 9. I have test success with scrcpy for window but my code didn't work.
What problem in my code?
Thanks for help!