Android仿支付宝密码输入效果封装

private MyInputPwdUtil myInputPwdUtil;
@Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 myInputPwdUtil = new MyInputPwdUtil(this);
 myInputPwdUtil.getMyInputDialogBuilder().setAnimStyle(R.style.dialog_anim);

 //可以定制自己进入退出动画，不设置没有动画
 myInputPwdUtil.setListener(new InputPwdView.InputPwdListener() {
 @Override
 public void hide() {
  myInputPwdUtil.hide();
 }

 @Override
 public void forgetPwd() {
  Toast.makeText(MainActivity.this, "忘记密码", Toast.LENGTH_SHORT).show();
 }

 @Override
 public void finishPwd(String pwd) {
  Toast.makeText(MainActivity.this, pwd, Toast.LENGTH_SHORT).show();
 }
 });
}
public void show(View view){
 myInputPwdUtil.show();
}

 int height = getHeight();
 int width = getWidth();
 //画边框
 RectF rect = new RectF(0, 0, width, height);
 borderPaint.setColor(borderColor);
 canvas.drawRoundRect(rect, borderRadius, borderRadius, borderPaint);
 //画内容区域
 RectF rectContent = new RectF(rect.left + defaultContentMargin, rect.top + defaultContentMargin, rect.right - defaultContentMargin, rect.bottom - defaultContentMargin);
 borderPaint.setColor(getResources().getColor(R.color.myInputPwdBase_gray));
 canvas.drawRoundRect(rectContent, borderRadius, borderRadius, borderPaint);

 //画分割线:分割线数量比密码数少1
 borderPaint.setColor(borderColor);
 borderPaint.setStrokeWidth(defaultSplitLineWidth);
 for (int i = 1; i < passwordLength; i++) {
 float x = width * i / passwordLength;
 canvas.drawLine(x, 0, x, height, borderPaint);
 }

 //画密码内容
 float px, py = height / 2;
 float halfWidth = width / passwordLength / 2;
 for (int i = 0; i < textLength; i++) {
 px = width * i / passwordLength + halfWidth;
 canvas.drawCircle(px, py, passwordWidth, passwordPaint);
 }