How can I convert a key code into a char or string?

问题

How to convert the keycode into char or string??

Here is the example code:

public boolean onKey(View v, int keyCode, KeyEvent event) {
    // TODO Auto-generated method stub
    //Log.d("EditText", "It's Working...!" + event.getAction());
    if (event.getAction() == 0) {
        switch (v.getId()) {
        case R.id.editText1:
            Log.d("EditText", "In editText1");
            if (text1.length() == 3)
            {
                text2.setText();
                text2.requestFocus();

            }
            break;

        case R.id.editText2:
            Log.d("EditText", "In editText2");
            if (text2.length() == 0)
                text1.requestFocus();
            break;
        }
    }

    return false;
}

回答1:

char unicodeChar = (char)event.getUnicodeChar();

回答2:

Use event.getNumber().

回答3:

If you don't have a KeyEvent object you can use this on the keycode :

public void onKey(int primaryCode, int[] keyCodes) {
     char c = Character.toChars(primaryCode)[0];
}

回答4:

Tod answer is almost complete, but when you want to settext of an edittext with this eventcode you should to add a little thing:

sample_et.setText((char)event.getUnicodeChar()+"");

回答5:

Try this..

String s="";

@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
    EditText t=(EditText)v;
    s=t.getText();  
    return false;
}

回答6:

Use

String.fromCharCode();

String.fromCharCode(65,66,67) returns ABC.

See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/fromCharCode .

来源：https://stackoverflow.com/questions/6571081/how-can-i-convert-a-key-code-into-a-char-or-string