Renderscript中是否有任何字符串函数?比如vsprintf,例如?
具体来说,我想将float转换为字符串。我是否必须从头开始编写?
谢谢!
答案 0 :(得分:3)
对不起,这是一个更好的。它也适用于整数,但它们添加了“.000”。
char stringBuffer[50];
static const int MAX_STRING_LENGTH = sizeof(stringBuffer) - 1;
void drawFloat(float value, int x, int y) {
int index = 0;
int scaledValue = (int)(value * 1000);
index = MAX_STRING_LENGTH;
stringBuffer[index] = 0;
while(scaledValue > 0 || index > MAX_STRING_LENGTH - 4) {
index--;
if(index == MAX_STRING_LENGTH - 4) {
stringBuffer[index--] = '.';
}
int digitValue = scaledValue % 10;
stringBuffer[index] = '0' + digitValue;
scaledValue /= 10;
}
if(value < 0) {
stringBuffer[index--] = '-';
}
rsgDrawText(&stringBuffer[index], x - 10, y + 5);
}
答案 1 :(得分:1)
无法找到一个简单的方法......
void drawInteger(int value, int x, int y) {
char text[50] = "0";
int index = 0;
if(value != 0) {
index = 49;
text[index] = 0;
while(value > 0) {
index--;
int digitValue = value % 10;
text[index] = '0' + digitValue;
value /= 10;
}
if(value < 0) {
text[index--] = '-';
}
}
rsgDrawText(&text[index], x - 10, y + 5);
}
void drawFloat(float value, int x, int y) {
char text[50] = "0.000";
int index = 0;
if(value != 0) {
int integerPart = (int)(value * 1000);
index = 49;
text[index] = 0;
while(integerPart > 0) {
index--;
if(index == 45) {
text[index--] = '.';
}
int digitValue = integerPart % 10;
text[index] = '0' + digitValue;
integerPart /= 10;
}
if(value < 0) {
text[index--] = '-';
}
}
rsgDrawText(&text[index], x - 10, y + 5);
}