Fix sdcv on Android cannot handle morphological changes

frontend/apps/reader/modules/readerdictionary.lua

@@ -70,12 +70,18 @@ function ReaderDictionary:stardictLookup(word, box)
         word = require("util").stripePunctuations(word)
         DEBUG("stripped word:", word)
         -- escape quotes and other funny characters in word
-        local std_out = io.popen("./sdcv --utf8-input --utf8-output -nj "
-            .. ("%q"):format(word) .. " --data-dir " .. self.data_dir, "r")
         local results_str = nil
-        if std_out then
-            results_str = std_out:read("*all")
-            std_out:close()
+        if Device:isAndroid() then
+            local A = require("android")
+            results_str = A.stdout("./sdcv", "--utf8-input", "--utf8-output",
+                    "-nj", word, "--data-dir", self.data_dir)
+        else
+            local std_out = io.popen("./sdcv --utf8-input --utf8-output -nj "
+                .. ("%q"):format(word) .. " --data-dir " .. self.data_dir, "r")
+            if std_out then
+                results_str = std_out:read("*all")
+                std_out:close()
+            end
         end
         --DEBUG("result str:", word, results_str)
         local ok, results = pcall(JSON.decode, results_str)

platform/android/llapp_main.lua

@@ -27,7 +27,7 @@ A.LOGI("intent file path " .. (file or ""))
 pcall(function() dofile("/sdcard/koreader/patch.lua") end)
 
 -- set proper permission for sdcv
-io.popen("chmod 755 ./sdcv")
+A.execute("chmod", "755", "./sdcv")
 
 -- create fake command-line arguments
 arg = {"-d", file or "/sdcard"}