Android：导航抽屉内有2个ListViews

Question

我想在导航抽屉中有2个ListViews。有人告诉我将2个ListViews包装在LinearLayout中，因为导航抽屉只能有2个孩子。但是，在LinearLayout中仅包装一个ListView会破坏我的导航抽屉。

我在做什么错了？

library(tidyverse)
newdat = data.2.test%>%
            unlist()%>%
            read.table(text = .,sep = ':')%>%
            as.matrix()%>%
            gsub(';','\n',.)%>%
            data.frame(stringsAsFactors = FALSE)

dat1 = newdat[-3]%>%
             group_by(V1)%>%
             mutate(V2=list(read.csv(text=V2,header = F,stringsAsFactors = F)))%>%
             unnest()

dat2 = newdat[-2]%>%
         group_by(V1)%>%
         mutate(V3=list(read.csv(text=V3,header = F,stringsAsFactors = F)))%>%
         unnest()

dat1
A tibble: 58 x 7
# Groups:   V1 [2]
   V1        V11    V2    V3    V4    V5    V6
   <chr>   <int> <int> <int> <int> <int> <dbl>
 1 1614689    -1     1    -1  -826 -3484     0
 2 1614689    -1     2    -1  -311 -3450     0
 3 1614689    -1     3    -1 -3732  -708     0
 4 1614689    -1     4    -1   137 -3387     0
 5 1614689     4     5    -1  5550  4400     0
 6 1614689     4     6    -1  5550  4400     0
 7 1614689     4     7    -1  5550  4400     0
 8 1614689     4     8    -1  5550  4400     0
 9 1614689    -1     9    -1 -1971 -2660     0
10 1614689     4    10    -1  5550  4400     0
# ... with 48 more rows

dat2
# A tibble: 2 x 7
# Groups:   V1 [2]
  V1        V11    V2    V3    V4 V5    V6   
  <chr>   <int> <int> <int> <dbl> <chr> <chr>
1 1614689 -1971 -2660     0  6.08 A     Dead 
2 1614690 -1970 -2666     0  6.08 A     Dead