Simple implementation of Android verification code _android

Simple implementation of Android verification code

We often request to enter the verification code when logging in or registering, here a brief introduction one method
The effect is as follows

The first is to get a random four-letter combination, I am here to store 26 letters in an array, and then randomly generate 4 subscript values, take the four subscript corresponding letters as the verification code.

public class Randomchars {
  char[] chars;

  Public Randomchars () {
    chars = new char[26];
    for (int i = 0; i < i++) {
      chars[i] = (char) (i +);
    }

  Public char[] Get4chars () {
    char[] rlt = new Char[4];
    for (int i = 0; i < rlt.length i++) {
      int randomindex = (int) (Math.random () *);
      Rlt[i] = Chars[randomindex];
    }
    Return RLT
  }
}

Customize a CodeView for verification code, mainly in the OnDraw method of operation, not fine, not good in onmeasure control size position.

    float unitwidth = (float) getwidth ()/(float) chars.length;
    for (int i = 0; i < chars.length i++) {
      String str = chars[i] + "";
      Textpaint.gettextbounds (str, 0, Str.length (), mrect);
      Resetcolor ();
      int angel = (int) (Math.random () * (8-( -8) +1) + ( -8));
      Canvas.rotate (Angel)//rotate letter, random angle
      canvas.drawtext (str, I * unitwidth + 5, getheight ()/2-mrect.centery (), Textpaint );
      /**
       * Very critical, rotating
       /
      canvas.save ()//Save state
      Canvas.restore ();//Recovery
    }

/**
 * Reset Random color
 * *
  private void Resetcolor () {
    int r = (int) (Math.random () * 230-30);
    int g = (int) (Math.random () * 230-30);
    int b = (int) (Math.random () * 230-30);
    Textpaint.setcolor (Color.rgb (R, G, b));
  

Set the control and pass in four characters OK, verify that the input is correct, consider the case, so all the letters entered into uppercase, is generally case-insensitive.

    Submit.setonclicklistener (New View.onclicklistener () {
      @Override public
      void OnClick (View v) {
        String Inputstr = Input.gettext (). toString ();
        Inputstr = Inputstr.touppercase ();
        str = Str.touppercase ();
        if (Str.equals (INPUTSTR)) {
          Toast.maketext (mainactivity.this, "input correct", Toast.length_short). Show ();
        else{
          Toast.maketext (mainactivity.this, "Validation code input Error", Toast.length_short). Show ();
          char[] GetChar = Randomchars.get4chars ();
          str = new String (getchar);
          Codeview.setchars (GetChar);
        }
      }
    );

Feel there are quite a few deficiencies, and continue to improve it!

The above is the entire content of this article, I hope to help you learn, but also hope that we support the cloud habitat community.