清理cpp 内容， 只保留主文件。CMakeLists.txt 采用根目录的。

app/src/main/java/com/hmwl/sample/MainActivity.java

@@ -1,14 +1,42 @@
 package com.hmwl.sample;
 
+import android.util.Log;
+import android.view.MotionEvent;
 import android.view.View;
 
 import com.google.androidgamesdk.GameActivity;
 
-public class MainActivity extends GameActivity {
+public class MainActivity extends GameActivity{
+    private static final String TAG = "MainActivity";
+
     static {
         System.loadLibrary("sample");
     }
 
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        int action = event.getActionMasked();
+        float x = event.getX();
+        float y = event.getY();
+
+        switch (action) {
+            case MotionEvent.ACTION_DOWN:
+                Log.d(TAG, "Java Layer: Touch DOWN at (" + x + ", " + y + ")");
+                // ✅ 你可以在这里做些事，比如发消息给 C++，或 UI 反馈
+                break;
+            case MotionEvent.ACTION_MOVE:
+                Log.d(TAG, "Java Layer: Touch MOVE");
+                break;
+            case MotionEvent.ACTION_UP:
+                Log.d(TAG, "Java Layer: Touch UP");
+                break;
+        }
+
+        // ⚠️ 关键：返回 false 才能让事件继续传递给 Native 层（C++）
+        // 如果返回 true，表示事件已被消费，C++ 层将收不到！
+        return false;
+    }
+
     @Override
     public void onWindowFocusChanged(boolean hasFocus) {
         super.onWindowFocusChanged(hasFocus);