SafeKeyboard safeKeyboard = SafeKeyboard.newBuilder(this)
                .setRandom(false)                               // 设置是否为随机键盘
                .setUpperLetter(false)                          // 设置是否为大写字母(只有默认为字母键盘时才有效)
                .setEditText(editText)                          // 设置EditText
                .setKeyboardView(keyboardView)                  // 设置KeyboardView
                .setKeyboardType(KeyboardType.TYPE_LETTER)      // 设置键盘类型
                .setKeyboardState(KeyboardState.STATE_SHOW)     // 设置键盘状态
                .build();                                       // 构建SafeKeyboard

        editText.setOnTouchListener(new KeyboardEditTextTouchListener(safeKeyboard, KeyboardType.TYPE_LETTER));