feat: 修复崩溃bug

app/src/main/java/io/legado/app/ui/config/FileAssociationViewModel.kt

@@ -13,7 +13,9 @@ import io.legado.app.utils.readText
 import java.io.File
 
 class FileAssociationViewModel(application: Application) : BaseViewModel(application) {
+
     fun dispatchIndent(uri: Uri): Intent? {
+        try {
             val url: String
             //如果是普通的url，需要根据返回的内容判断是什么
             if (uri.scheme == "file" || uri.scheme == "content") {
@@ -74,5 +76,10 @@ class FileAssociationViewModel(application: Application) : BaseViewModel(applica
             val newIndent = Intent(Intent.ACTION_VIEW)
             newIndent.data = data
             return newIndent
+        } catch (e: Exception) {
+            e.printStackTrace()
+            toast(e.localizedMessage)
+            return null
+        }
     }
 }