Embarcadero RAD Studio，C ++中的Android状态栏颜色

Question

编辑：

我设法使用此代码删除了状态栏的当前背景（以及导航栏的背景）

ANativeActivity_setWindowFlags(PANativeActivity(System::DelphiActivity),
TJWindowManager_LayoutParams::JavaClass->FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS,
TJWindowManager_LayoutParams::JavaClass->FLAG_TRANSLUCENT_STATUS);

仍然不知道如何添加新的背景颜色

这不起作用：

_di_JWindow androidWindow =  SharedActivity()->getWindow();
androidWindow->setStatusBarColor(17170432);

================================================ =======================

原帖：

我正在尝试为使用 FireMonkey/RAD Studio 制作的 Android 应用的状态栏着色。

为了在 Java 中实现它，我通常使用以下代码：

Window window = activity.getWindow();
window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window.setStatusBarColor(activity.getResources().getColor(R.color.my_statusbar_color));

在 RAD Studio 中，我正在尝试这样做

首先我在标头中包含 Android 库：

#ifdef __ANDROID__
#include <FMX.Helpers.Android.hpp>
#include <Androidapi.JNIBridge.hpp>
#include <Androidapi.JNI.Os.hpp>
#include <Androidapi.JNI.JavaTypes.hpp>
#include <Androidapi.JNI.GraphicsContentViewText.hpp>
#include <Androidapi.JNI.Util.hpp>
#include <Androidapi.JNI.App.hpp>
#include <Androidapi.JNI.Embarcadero.hpp>
#include <Androidapi.Jni.hpp>
#endif

然后当我试图打电话时：

JWindow androidWindow =  JNativeActivity::getWindow();

我收到超过 100 个错误，如下所示：

[bccaarm Error] HeaderFooterTemplate.cpp(67): call to non-static member function without an object argument
[bccaarm Error] HeaderFooterTemplate.cpp(67): variable type 'Androidapi::Jni::Graphicscontentviewtext::JWindow' is an abstract class
  sysmac.h(327): unimplemented pure virtual method 'QueryInterface' in 'JWindow'
  sysmac.h(328): unimplemented pure virtual method 'AddRef' in 'JWindow'
  sysmac.h(329): unimplemented pure virtual method 'Release' in 'JWindow'
  Androidapi.JNI.JavaTypes.hpp(763): unimplemented pure virtual method 'equals' in 'JWindow'
  Androidapi.JNI.JavaTypes.hpp(764): unimplemented pure virtual method 'getClass' in 'JWindow'
  Androidapi.JNI.JavaTypes.hpp(765): unimplemented pure virtual method 'hashCode' in 'JWindow'
  Androidapi.JNI.JavaTypes.hpp(766): unimplemented pure virtual method 'notify' in 'JWindow'
  Androidapi.JNI.JavaTypes.hpp(767): unimplemented pure virtual method 'notifyAll' in 'JWindow'
  Androidapi.JNI.JavaTypes.hpp(768): unimplemented pure virtual method 'toString' in 'JWindow'
  Androidapi.JNI.JavaTypes.hpp(769): unimplemented pure virtual method 'wait' in 'JWindow'
  Androidapi.JNI.JavaTypes.hpp(770): unimplemented pure virtual method 'wait' in 'JWindow'
  Androidapi.JNI.JavaTypes.hpp(771): unimplemented pure virtual method 'wait' in 'JWindow'
  Androidapi.JNI.GraphicsContentViewText.hpp(18831): unimplemented pure virtual method 'addContentView' in 'JWindow'
  Androidapi.JNI.GraphicsContentViewText.hpp(18832): unimplemented pure virtual method 'addFlags' in 'JWindow'
  Androidapi.JNI.GraphicsContentViewText.hpp(18833): unimplemented pure virtual method 'clearFlags' in 'JWindow'
  Androidapi.JNI.GraphicsContentViewText.hpp(18834): unimplemented pure virtual method 'closeAllPanels' in 'JWindow'
  Androidapi.JNI.GraphicsContentViewText.hpp(18835): unimplemented pure virtual method 'closePanel' in 'JWindow'
  Androidapi.JNI.GraphicsContentViewText.hpp(18836): unimplemented pure virtual method 'findViewById' in 'JWindow'
  Androidapi.JNI.GraphicsContentViewText.hpp(18837): unimplemented pure virtual method 'getAllowEnterTransitionOverlap' in 'JWindow'

这是我使用 C++ 的第一步，所以我不确定我做得对。

Answer 1

您没有正确使用 Embarcadero 的 JNI 包装类。翻译看起来更像这样：

_di_JActivity activity = SharedActivity();
// or: _di_JActivity activity = TAndroidHelper::Activity;

_di_JWindow window = activity->getWindow();
window->clearFlags(TJWindowManager_LayoutParams::JavaClass->FLAG_TRANSLUCENT_STATUS);
window->addFlags(TJWindowManager_LayoutParams::JavaClass->FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
window->setStatusBarColor(activity->getResources()->getColor(...));
// I don't know how to translate R.color.my_statusbar_color

不过，话虽如此，Embarcadero 对 JWindow 接口的定义不包括在 API 级别 21（Android 5 ，棒棒糖）。因此，除非您在自己的代码中为 Window 类手动定义自己的 JNI 接口，否则您将无法在 C++Builder 中调用 setStatusBarColor()，除非您在 Java 代码中进行调用是由您的 C++ 代码调用，或使用反射。

¹：除非它是在柏林 10.1 中添加的，我没有安装。它不存在于 10.0 西雅图。