预设数组

时间:2013-09-06 13:43:56

标签: android arrays

我设置了一个数组[8]来存储字符串转换。 X的范围是0到255.如果X小于127(7位),它不会写高位0。所以我将数组[8]预设为全0,下一个例程只会写入已更改的数据。代码编译但是数组[]都读取1,无论x = to。

int x = 10;
string=(Integer.toBinaryString(x));                          

int[] array = new int[8];                                    
for (int j=0; j < 7; j++){
     array[j]=0;    
}

for (int i=0; i < string.length(); i++) {
array[i] = Integer.parseInt(string.substring(i,i+1));
}

Log.d("TAG", "Data   " + array[0] + "" + array[1]+ "" + array[2] +
        "" + array[3]+  "" + array[4]+ "" + array[5] + 
        "" + array[6] + "" + array[7]);

1 个答案:

答案 0 :(得分:2)

    int x = 10;
    String s=(Integer.toBinaryString(x));               

    int[] array = new int[8]; 
    //no need for a loop that sets all values to 0.

    int offset = array.length - s.length();
    //you need this offset because the string may be shorter than the array

    for (int i=0; i < s.length(); i++) {
        array[i + offset] = Integer.parseInt(s.substring(i,i+1));
        //applay the offset here
    }

这将生成int = 10的跟随数组:

[0, 0, 0, 0, 1, 0, 1, 0]