feat: 大幅增强原生行为 — 修复P0 Bug + 补全核心API

P0 Bug 修复:
- Canvas.drawBitmap 重复定义导致重载丢失 → 合并为*args重载
- String.hashCode() 不可达的第二return → 修复为单return
- File.compareTo() 调用不存在的__cmp__ → 改为显式比较
- HashMap.remove() 逻辑错误 → 区分单参(返回旧值)/双参(返回boolean)

P1 核心行为增强:
- Handler: sendMessage/sendMessageDelayed 现在真正入队异步执行
- Looper: loop() 实现真正的消息循环(按when时间取出到期消息)
- AsyncTask: execute() 在后台线程池执行,完成后主线程回调
- Bundle: 新增12个数组类型put/get方法
- Math.round: 改为Java语义(floor(a+0.5))而非Python银行家舍入
- Thread: currentThread()缓存对象, 新增join/getState/getId/getPriority
- String: 新增strip/repeat/isBlank/lines/subSequence/getChars/chars/formatted/translateEscapes

P2 缺失API补全:
- 新增21个Java标准Exception类 (NullPointerException等)
- View: 新增39个事件处理/监听器/位置尺寸方法
- Activity: 新增33个生命周期/权限/UI方法
- Context: 新增22个文件流/权限/资源/主题方法
- Canvas: 支持 Canvas(Bitmap) 构造函数重载
- __init__.py: __all__ 补全Exception体系和Activity类

android_pyapi/android/app.py

@@ -1698,6 +1698,129 @@ class Activity(Stub):
     def onPictureInPictureModeChanged(self, is_in_pip_mode: bool, new_config):
         pass
 
+    # ─── 生命周期 (扩展) ───────────────────────────────────────
+
+    def onPostCreate(self, savedInstanceState):
+        pass
+
+    def onPostResume(self):
+        pass
+
+    def onUserLeaveHint(self):
+        pass
+
+    def onUserInteraction(self):
+        pass
+
+    def onCreateContextMenu(self, menu, v, menuInfo):
+        pass
+
+    def onContextMenuClosed(self, menu):
+        pass
+
+    def onContextItemSelected(self, item):
+        return False
+
+    def onWindowFocusChanged(self, hasFocus):
+        pass
+
+    def onWindowAttributesChanged(self, params):
+        pass
+
+    def onContentChanged(self):
+        pass
+
+    def onAttachedToWindow(self):
+        pass
+
+    def onDetachedFromWindow(self):
+        pass
+
+    def onTitleChanged(self, title, color):
+        pass
+
+    # ─── 权限 (扩展) ───────────────────────────────────────────
+
+    def requestPermissions(self, permissions, requestCode):
+        pass
+
+    def checkSelfPermission(self, permission):
+        return 0  # PERMISSION_GRANTED
+
+    def shouldShowRequestPermissionRationale(self, permission):
+        return False
+
+    # ─── UI (扩展) ─────────────────────────────────────────────
+
+    def getWindow(self):
+        if not hasattr(self, '_window'):
+            from .view import Window
+            self._window = Window()
+        return self._window
+
+    def getWindowManager(self):
+        if not hasattr(self, '_window_manager'):
+            from .view import WindowManager
+            self._window_manager = WindowManager()
+        return self._window_manager
+
+    def setRequestedOrientation(self, requestedOrientation):
+        self._requested_orientation = requestedOrientation
+
+    def getRequestedOrientation(self):
+        return getattr(self, '_requested_orientation', 0)
+
+    def runOnUiThread(self, action):
+        import threading
+        # 在桌面环境直接执行
+        action()
+
+    def overridePendingTransition(self, enterAnim, exitAnim):
+        pass
+
+    def getActionBar(self):
+        return getattr(self, '_action_bar', None)
+
+    def setActionBar(self, toolbar):
+        self._action_bar = toolbar
+
+    def getMenuInflater(self):
+        from .view import MenuInflater
+        return MenuInflater()
+
+    def onCreateOptionsMenu(self, menu):
+        return True
+
+    def onPrepareOptionsMenu(self, menu):
+        return True
+
+    def onOptionsItemSelected(self, item):
+        return False
+
+    def registerForContextMenu(self, view):
+        pass
+
+    def unregisterForContextMenu(self, view):
+        pass
+
+    def openContextMenu(self, view):
+        pass
+
+    def finishAffinity(self):
+        self.finish()
+
+    def invalidateOptionsMenu(self):
+        pass
+
+    def setVisible(self, visible):
+        self._visible = visible
+
+    def setTheme(self, resid):
+        self._theme = resid
+
+    def getTheme(self):
+        return getattr(self, '_theme', 0)
+
 
 # ═══════════════════════════════════════════════════════════════
 # Service