Merge pull request #253 from HaliksaR/fix-npe

Fix npe

app/src/main/java/com/vanced/manager/core/downloader/VancedDownloader.kt

@@ -36,7 +36,7 @@ object VancedDownloader: CoroutineScope by CoroutineScope(Dispatchers.IO) {
     private var installUrl: String? = null
     private var variant: String? = null
     private var theme: String? = null
-    private var lang: MutableList<String>? = null
+    private var lang = mutableListOf<String>()
 
     private lateinit var themePath: String
 
@@ -56,7 +56,9 @@ object VancedDownloader: CoroutineScope by CoroutineScope(Dispatchers.IO) {
         downloadPath = context.getExternalFilesDir("vanced/$variant")?.path
         File(downloadPath.toString()).deleteRecursively()
         installUrl = defPrefs.getInstallUrl()
-        lang = prefs.getString("lang", getDefaultVancedLanguages())?.split(", ")?.toMutableList()
+        prefs.getString("lang", getDefaultVancedLanguages())?.let {
+            lang = it.split(", ").toMutableList()
+        }
         theme = prefs.getString("theme", "dark")
         vancedVersion = defPrefs.getString("vanced_version", "latest")?.getLatestAppVersion(vancedVersions.get()?.value ?: listOf(""))
         themePath = "$installUrl/apks/v$vancedVersion/$variant/Theme"
@@ -112,7 +114,7 @@ object VancedDownloader: CoroutineScope by CoroutineScope(Dispatchers.IO) {
                             "lang" -> {
                                 count++
                                 succesfulLangCount++
-                                if (count < lang?.size!!)
+                                if (count < lang.size)
                                     downloadSplits(context, "lang")
                                 else
                                     startVancedInstall(context)
@@ -132,9 +134,9 @@ object VancedDownloader: CoroutineScope by CoroutineScope(Dispatchers.IO) {
                         if (type == "lang") {
                             count++
                             when {
-                                count < lang?.size!! -> downloadSplits(context, "lang")
+                                count < lang.size       -> downloadSplits(context, "lang")
                                 succesfulLangCount == 0 -> {
-                                    lang?.add("en")
+                                    lang.add("en")
                                     downloadSplits(context, "lang")
                                 }
                                 else -> startVancedInstall(context)

app/src/main/java/com/vanced/manager/ui/dialogs/VancedLanguageSelectionDialog.kt

@@ -71,7 +71,7 @@ class VancedLanguageSelectionDialog : BottomSheetDialogFragment() {
                         val loc = Locale(lang)
                         val box: MaterialCheckBox = MaterialCheckBox(requireActivity()).apply {
                             tag = lang
-                            isChecked = langPrefs!!.contains(lang)
+                            isChecked = langPrefs?.contains(lang) ?: false
                             text = loc.getDisplayLanguage(loc).capitalize(Locale.ROOT)
                             textSize = 18F
                             typeface = ResourcesCompat.getFont(requireActivity(), R.font.exo_bold)

app/src/main/java/com/vanced/manager/utils/InternetTools.kt

@@ -100,9 +100,9 @@ object InternetTools {
         return getJsonString(hashUrl, obj, context)
     }
 
-    fun checkSHA256(sha256: String, updateFile: File?): Boolean {
+    fun checkSHA256(sha256: String, updateFile: File): Boolean {
         return try {
-            val dataBuffer = updateFile!!.readBytes()
+            val dataBuffer = updateFile.readBytes()
             // Generate the checksum
             val sum = generateChecksum(dataBuffer)
 

app/src/main/java/com/vanced/manager/utils/JsonHelper.kt

@@ -12,15 +12,11 @@ object JsonHelper {
     private var dataMap: HashMap<String, JsonObject> = HashMap()
 
     suspend fun getJson(url: String): JsonObject? {
-        return try {
-            if(dataMap.containsKey(url)) {
-                dataMap[url]!!
-            } else {
-                dataMap[url] = getSuspendJson(url)
-                dataMap[url]!!
-            }
-        } catch (e: Exception) {
-            null
+        return if (dataMap.containsKey(url)) {
+            dataMap[url]
+        } else {
+            dataMap[url] = getSuspendJson(url)
+            dataMap[url]
         }
     }
 

app/src/main/java/com/vanced/manager/utils/MiuiHelper.kt

@@ -6,28 +6,20 @@ import java.io.InputStreamReader
 
 object MiuiHelper {
 
-    fun isMiui(): Boolean = getSystemProps("ro.miui.ui.version.name")!!.isNotEmpty()
+    private const val MIUI_PROP_NAME = "ro.miui.ui.version.name"
+
+    fun isMiui(): Boolean = !getSystemProps(MIUI_PROP_NAME).isNullOrEmpty()
 
     private fun getSystemProps(propname: String): String? {
-        val line: String
         var input: BufferedReader? = null
-        try {
-            val p = Runtime.getRuntime().exec("getprop $propname")
-            input = BufferedReader(InputStreamReader(p.inputStream), 1024)
-            line = input.readLine()
-            input.close()
+        return try {
+            val process = Runtime.getRuntime().exec("getprop $propname")
+            input = BufferedReader(InputStreamReader(process.inputStream), 1024)
+            input.readLine()
         } catch (e: IOException) {
-            return null
+            null
         } finally {
-            if (input != null) {
-                try {
-                    input.close()
-                } catch (e: IOException) {
-                    e.printStackTrace()
-                }
-            }
+            input?.close()
         }
-        return line
     }
-
 }

app/src/main/java/com/vanced/manager/utils/PackageHelper.kt

@@ -298,7 +298,7 @@ object PackageHelper {
             }
 
         } finally {
-            session!!.close()
+            session?.close()
         }
     }
 
@@ -579,8 +579,8 @@ object PackageHelper {
 
 
     @Throws(IOException::class)
-    fun copy(src: File?, dst: File?) {
-        val cmd = Shell.su("mv ${src!!.absolutePath} ${dst!!.absolutePath}").exec().isSuccess
+    fun copy(src: File, dst: File) {
+        val cmd = Shell.su("mv ${src.absolutePath} ${dst.absolutePath}").exec().isSuccess
         Log.d("ZLog", cmd.toString())
     }