Android：将文本输入转换为ASCII并将其打印为字符串

Question

This is my code

EditText textExtract = (EditText) findViewById(R.id.textInput);
    String textInput = textExtract.getText().toString();
    TextView textOut = (TextView) findViewById(R.id.textOutput);

I am taking input from the user and storing it in String textInput . Now, how do I convert the String textInput to a String of ASCII values which I want to print using the textView textOut.

For example,

Input = "abcd"
Output = 979899100

Answer 1

public static long toAscii(String s){
    StringBuilder sb = new StringBuilder();
    String ascString = null;
    long asciiInt;
    for (int i = 0; i < s.length(); i++){
        sb.append((int)s.charAt(i));
        char c = s.charAt(i);
    }
    ascString = sb.toString();
    asciiInt = Long.parseLong(ascString);
    return asciiInt;
}



String outputText = toAscii(textInput).toString();
textOut.setText(outputText);

This could be helpful for your case

Answer 2

循环进入字符串，并将每个字符转换为Character.toString（（char）i），将结果存储在数组中并将其作为字符串打印。

Answer 3

You can convert a character to ascii by casting the char to an int for example

char c = 'A';
int ascii = (int) c;

To convert a whole string, iterate over the array of all chars. You can get the Array using "Hello".getCharArray();

That would look like this:

String input = "Hello World";
StringBuilder sb = new StringBuilder();
char[] chars = input.toCharArray();
for(char c : chars) 
    sb.append((int) c);
String output = sb.toString();

Here a StringBuilder is used to chain the single numbers together, which is better than using .concat() on Strings multiple times.

Answer 4

   String str = textView1.getText().toString();
    StringBuilder sb = new StringBuilder();
    for (char c : str.toCharArray())
        sb.append((int)c);
    BigInteger mInt = new BigInteger(sb.toString());
    textView2.setText(mInt.toString());