check if orbot is installed

app/src/main/AndroidManifest.xml

@@ -1,7 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
-
+    <queries>
+        <package android:name="org.torproject.android"/>
+    </queries>
     <uses-feature android:name="android.hardware.camera" android:required="false" />
 
     <uses-permission android:name="android.permission.INTERNET"/>

app/src/main/java/com/vitorpamplona/amethyst/ui/navigation/DrawerContent.kt

@@ -277,10 +277,10 @@ fun ListContent(
             onClick = { backupDialogOpen = true }
         )
 
-        var textTorProxy = if (checked) stringResource(R.string.disable) else stringResource(R.string.enable)
+        val textTorProxy = if (checked) stringResource(R.string.disconnect_from_your_orbot_setup) else stringResource(R.string.connect_via_tor)
 
         IconRow(
-            title = "$textTorProxy Tor",
+            title = textTorProxy,
             icon = R.drawable.ic_tor,
             tint = MaterialTheme.colors.onBackground,
             onClick = {

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedOff/LoginScreen.kt

@@ -1,5 +1,6 @@
 package com.vitorpamplona.amethyst.ui.screen.loggedOff
 
+import android.content.Context
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.rememberScrollState
@@ -222,13 +223,15 @@ fun LoginPage(
                 }
             }
 
-            Row(verticalAlignment = Alignment.CenterVertically) {
-                Checkbox(
-                    checked = useProxy.value,
-                    onCheckedChange = { useProxy.value = it }
-                )
+            if (isPackageInstalled(context, "org.torproject.android")) {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    Checkbox(
+                        checked = useProxy.value,
+                        onCheckedChange = { useProxy.value = it }
+                    )
 
-                Text(stringResource(R.string.connect_via_tor))
+                    Text(stringResource(R.string.connect_via_tor))
+                }
             }
 
             Spacer(modifier = Modifier.height(20.dp))
@@ -290,3 +293,7 @@ fun LoginPage(
         )
     }
 }
+
+fun isPackageInstalled(context: Context, target: String): Boolean {
+    return context.packageManager.getInstalledApplications(0).find { info -> info.packageName == target } != null
+}

app/src/main/res/values/strings.xml

@@ -292,10 +292,9 @@
     <string name="lightning_create_and_add_invoice">Create and Add</string>
     <string name="poll_author_no_vote">Poll authors can\'t vote in their own polls.</string>
     <string name="poll_hashtag" translatable="false">#zappoll</string>
-    <string name="connect_via_tor">Connect via Tor</string>
-    <string name="do_you_really_want_to_disable_tor">Do you really want to disable tor?</string>
-    <string name="disable">Disable</string>
-    <string name="enable">Enable</string>
+    <string name="connect_via_tor">Connect through your Orbot setup</string>
+    <string name="do_you_really_want_to_disable_tor">Do you really want to disconnect from your Orbot setup?</string>
     <string name="yes">Yes</string>
     <string name="no">No</string>
+    <string name="disconnect_from_your_orbot_setup">Disconnect from your Orbot setup</string>
 </resources>