allprojects {
 repositories {
 ...
 maven { url 'https://jitpack.io' }
 }
}

dependencies {
  implementation 'com.github.WShaobin:VerificationCodeInputView:1.0.2'
}

<com.wynsbin.vciv.VerificationCodeInputView
  android:id="@+id/vciv_code"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_marginTop="48dp"
  android:gravity="center"
  android:orientation="horizontal"
  app:vciv_et_background="@android:color/white"
  app:vciv_et_foucs_background="@android:color/holo_orange_dark"
  app:vciv_et_cursor_color="@color/colorPrimary"
  app:vciv_et_height="58dp"
  app:vciv_et_inputType="number"
  app:vciv_et_number="6"
  app:vciv_et_text_color="@android:color/black"
  app:vciv_et_text_size="18sp"
  app:vciv_et_underline_default_color="@android:color/holo_green_dark"
  app:vciv_et_underline_focus_color="@android:color/holo_blue_bright"
  app:vciv_et_underline_height="2dp"
  app:vciv_et_underline_show="true"
  app:vciv_et_width="58dp" />

VerificationCodeInputView view = findViewById(R.id.vciv_code);
view.setOnInputListener(new VerificationCodeInputView.OnInputListener() {
  @Override
  public void onComplete(String code) {
    Toast.makeText(MainActivity.this, code, Toast.LENGTH_SHORT).show();
  }

  @Override
  public void onInput() {

  }
});

//清除驗(yàn)證碼
view.clearCode();