JNI-C
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2022-03-10 15:10:01
微软官网文档 API: https://docs.microsoft.com/en-us/windows/desktop/api/index 窗口操作API:https://docs.microsoft.com/en-us/windows/desktop/api/winuser/ 窗口操作API详解 ......
微软官网文档
api:
窗口操作api:
窗口操作api详解:
①setwindowpos函数详解:
数据类型对应关系及互相转换方式
hwnd handle1 jlong handle2 long handle3
hwnd handle1 = (hwnd)handle2;
jlong handle2 = (jlong)handle1;
windows 数据类型
所有的 windows 数据类型都是由 c 数据类型经过类型重定义得到的
1.句柄
hwnd hwnd
2.
lpstr
lpstr window_title = new char[2048];
lpwstr
lpwstr window_title = new wchar_t[2048];
功能块
1.关于windows中正在使用的窗口的标题(32位运行环境)
1 #include "tool_windowinterface.h" 2 #include "jni.h" 3 #include <windows.h> 4 5 int getlength(lpwstr pat){ 6 int i=0; 7 while(true) 8 { 9 if(pat[i] == null){ 10 break; 11 } 12 i = i + 1; 13 } 14 return i; 15 } 16 17 jstring stojstring(jnienv* env, const lpwstr pat){ 18 jclass strclass = env->findclass("ljava/lang/string;"); 19 jmethodid ctorid = env->getmethodid(strclass, "<init>", "([bljava/lang/string;)v"); 20 jbytearray bytes = env->newbytearray(getlength(pat)); 21 env->setbytearrayregion(bytes, 0, getlength(pat), (jbyte*)pat); 22 jstring encoding = env->newstringutf("utf-8"); 23 return (jstring)env->newobject(strclass, ctorid, bytes, encoding); 24 } 25 26 jniexport jstring jnicall java_tool_windowinterface_getcurwintitle(jnienv *env, jobject){ 27 hwnd foreground = getforegroundwindow(); 28 lpwstr window_title = new wchar_t[1024]; 29 if (foreground){ 30 getwindowtext(foreground, window_title, 1024); 31 } 32 return stojstring(env, window_title); 33 }
2.获取windows中当前窗口的位置,及宽高
1 #include <windows.h> 2 3 hwnd foreground = getforegroundwindow(); 4 rect rect; 5 lprect lprect = ▭ 6 getwindowrect(foreground, lprect); 7 //位置 8 printf("%d ", lprect->left); 9 printf("%d ", lprect->top); 10 //宽高 11 printf("%d ", lprect->right - lprect->left); 12 printf("%d ", lprect->bottom - lprect->top);
3.显示指定窗口
1 jniexport void jnicall java_tool_windowinterface_showwindow(jnienv *, jobject, jlong handle){ 2 3 rect rect; 4 lprect lprect = ▭ 5 hwnd foreground = (hwnd)handle; 6 getwindowrect(foreground, lprect); 7 setwindowpos(foreground, hwnd_topmost, lprect->left, lprect->top, lprect->right - lprect->left, lprect->bottom - lprect->top, swp_nosize|swp_nomove|swp_showwindow); 8 setforegroundwindow(foreground); 9 }
4.隐藏指定窗口
1 jniexport void jnicall java_tool_windowinterface_hidewindow(jnienv *, jobject, jlong handle){ 2 3 rect rect; 4 lprect lprect = ▭ 5 hwnd foreground = (hwnd)handle; 6 getwindowrect(foreground, lprect); 7 setwindowpos(foreground, hwnd_bottom, lprect->left, lprect->top, lprect->right - lprect->left, lprect->bottom - lprect->top, swp_nosize|swp_nomove|swp_hidewindow); 8 }
注意:以上功能块中为主要代码,并不是完整版代码