因项目需要,需要获取机器运行时的屏幕尺寸信息,屏幕尺寸的信息字符串格式如下
一般:
abcd_xxxx_T60000-xxxx_xxxxxxxx_abc
abcd_xxxx-T60000-xxxx_xxxxxxxx_adbc
ab_xxxx_T50QS5_xxxxx_xxxxx_xxxxxx_abc
特殊:
abcd_xxxx_T64500_xxxx_xxxxxxx_abc
一般屏幕尺寸的大小时第二个字符分隔符T后两位数字,但特殊的时候大小是后两位+1,需要编写代码来实现。
思路:(为了先理清思路,自己先用Visual Studio 创建c++工程跑通后再去整体调试)
1、将传入的屛参字符串进行遍历,判断是否是“_”或者“-”,发现第二分隔符后,记录字符串下标,把T后面的所有字符串先拷贝到一个字符数组待用;
2、对一般字符串直接取T后后两位即可,特殊的字符串取后三位(特殊的时候屏幕大小后为5),进5后取余(或者取后两位直接+1)即可。
//获取屏幕尺寸 S32 getPanelSize(CHAR *panelSize) { NULL_PTR_CHECK(panelSize); S32 ret = SUCCESS; S32 index = 0; S32 findCount = 0; CHAR buffer[255] = {0}; CHAR pNameStr[PROPERTY_VALUE_MAX] = {0}; const CHAR* defaultPanelSize = "49"; getPanelID(pNameStr); //pNameStr 是待处理的字符串 while (pNameStr[index] != '\0') { if (pNameStr[index] == '_' || pNameStr[index] == '-') { findCount++; if (findCount == 2) { strncpy(buffer, pNameStr + index + 1, strlen(pNameStr + index + 1)); break; } } index++; } if ((index + 1) >= sizeof(pNameStr)) { LOGE("%s line %d,not find panel size,use default",__FUNCTION__,__LINE__); strncpy(panelSize, defaultPanelSize, strlen(defaultPanelSize)); } else { if (!strncmp(buffer, "T", 1)) { LOGE("%s line %d, ******find******", __FUNCTION__, __LINE__); if(buffer[3] == '5') { //special: abcd_xxxx_T64500_xxxx_xxxxxxx_abc strncpy(panelSize, buffer + 1, 3); sprintf(panelSize, "%d",(atoi(panelSize) + 5)/10); } else {
//common:
//abcd_xxxx_T60000-xxxx_xxxxxxxx_abc
//abcd_xxxx-T60000-xxxx_xxxxxxxx_adbc
//ab_xxxx_T50QS5_xxxxx_xxxxx_xxxxxx_abc
strncpy(panelSize, buffer + 1, 2); } } else { LOGE("%s line %d,not find panel size222, use default",__FUNCTION__,__LINE__); strncpy(panelSize, defaultPanelSize, strlen(defaultPanelSize)); } } LOGE("%s line %d, panel size = %s", __FUNCTION__, __LINE__, panelSize); return SUCCESS; }
