APP_CMD_WINDOW_RESIZED 未被调用，但本机 window 已调整大小

Question

我有本机应用程序，它被配置为在设备方向更改时不破坏 activity。

<activity android:name="android.app.NativeActivity"
    ...
    android:configChanges="orientation|screenSize"
    ...
    >

当设备方向改变时仅触发本机生命周期命令后。

/**
 * Command from main thread: the current device configuration has changed.
 */
APP_CMD_CONFIG_CHANGED

在命令处理程序中，我可以看到 window 大小已通过 ANativeWindow_getHeight 函数更改。

（我知道 ANativeWindow_getHeight 函数不是在配置更改处理程序中使用以获得 window 大小的最佳主意，我只需要检查 [= =35=] 已调整大小。)

如果调整本机 windows 的大小，我想应该触发以下本机命令？

/**
 * Command from main thread: the current ANativeWindow has been resized.
 * Please redraw with its new size.
 */
APP_CMD_WINDOW_RESIZED

为什么被屏蔽了？

Answer 1

自己找出原因，

android 本机应用程序胶水没有触发 APP_CMD_WINDOW_RESIZED 命令的代码。但只有它的定义。

之所以这样，是因为app glue code没有注册原生回调onNativeWindowResized

void ANativeActivity_onCreate(ANativeActivity* activity, 
                             void* savedState, size_t savedStateSize) {
    LOGV("Creating: %p\n", activity);
    activity->callbacks->onDestroy = onDestroy;
    activity->callbacks->onStart = onStart;
    activity->callbacks->onResume = onResume;
    activity->callbacks->onSaveInstanceState = onSaveInstanceState;
    activity->callbacks->onPause = onPause;
    activity->callbacks->onStop = onStop;
    activity->callbacks->onConfigurationChanged = onConfigurationChanged;
    activity->callbacks->onLowMemory = onLowMemory;
    activity->callbacks->onWindowFocusChanged = onWindowFocusChanged;
    activity->callbacks->onNativeWindowCreated = onNativeWindowCreated;
    activity->callbacks->onNativeWindowDestroyed = onNativeWindowDestroyed;
    activity->callbacks->onInputQueueCreated = onInputQueueCreated;
    activity->callbacks->onInputQueueDestroyed = onInputQueueDestroyed;
    activity->instance = android_app_create(activity, savedState, savedStateSize); 
}

最后，它没有注册的原因是 android 描述的错误 here

原生回调的文档是here

APP_CMD_WINDOW_RESIZED 未被调用，但本机 window 已调整大小

APP_CMD_WINDOW_RESIZED is not called but native window is resized

android

android-ndk

native-activity