Permissions cleanup (#12)

* bringing in audio/video perms into sdk and documentation

* Update README.md

@@ -67,6 +67,11 @@ class MainActivity : AppCompatActivity(), RoomListener {
 }
 ```
 
+### Permissions
+
+LiveKit relies on the `RECORD_AUDIO` and `CAMERA` permissions to use the microphone and camera.
+These permission must be requested at runtime. Reference the [sample app](https://github.com/livekit/client-sdk-android/blob/4e76e36e0d9f895c718bd41809ab5ff6c57aabd4/sample-app-compose/src/main/java/io/livekit/android/composesample/MainActivity.kt#L134) for an example.
+
 ## Dev Environment
 
 To develop the Android SDK itself, you'll need:

@@ -51,7 +51,7 @@ ext {
             minVersion    : 21,
     ]
     versions = [
-            androidx_core     : "1.2.0",
+            androidx_core     : "1.6.0",
             androidx_lifecycle: "2.3.1",
             dagger            : "2.27",
             groupie           : "2.9.0",

@@ -101,6 +101,8 @@ dependencies {
     implementation 'org.jetbrains.kotlinx:kotlinx-serialization-json:1.1.0'
     api 'com.github.webrtc-sdk:android:92.4515.01'
     api "com.squareup.okhttp3:okhttp:4.9.0"
+    implementation "androidx.annotation:annotation:1.2.0"
+    implementation "androidx.core:core:${versions.androidx_core}"
     implementation "com.google.protobuf:protobuf-java:${versions.protobuf}"
     implementation "com.google.protobuf:protobuf-java-util:${versions.protobuf}"
 

@@ -3,4 +3,7 @@
 
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+    <uses-permission android:name="android.permission.CAMERA" />
+
 </manifest>

 package io.livekit.android.room.participant
 
+import android.Manifest
 import android.content.Context
 import android.media.MediaCodecInfo
+import androidx.annotation.RequiresPermission
 import com.google.protobuf.ByteString
 import dagger.assisted.Assisted
 import dagger.assisted.AssistedFactory
@@ -32,6 +34,11 @@ internal constructor(
     private val localTrackPublications
         get() = tracks.values.toList()
 
+    /**
+     * Creates an audio track, recording audio through the microphone with the given [options].
+     *
+     * @exception SecurityException will be thrown if [Manifest.permission.RECORD_AUDIO] permission is missing.
+     */
     fun createAudioTrack(
         name: String = "",
         options: LocalAudioTrackOptions = LocalAudioTrackOptions(),
@@ -45,9 +52,14 @@ internal constructor(
             MediaConstraints.KeyValuePair("googTypingNoiseDetection", options.typingNoiseDetection.toString()),
         )
         audioConstraints.optional.addAll(items)
-        return LocalAudioTrack.createTrack(peerConnectionFactory, audioConstraints, name)
+        return LocalAudioTrack.createTrack(context, peerConnectionFactory, audioConstraints, name)
     }
 
+    /**
+     * Creates a video track, recording video through the camera with the given [options].
+     *
+     * @exception SecurityException will be thrown if [Manifest.permission.CAMERA] permission is missing.
+     */
     fun createVideoTrack(
         name: String = "",
         options: LocalVideoTrackOptions = LocalVideoTrackOptions(),

 package io.livekit.android.room.track
 
+import android.Manifest
+import android.content.Context
+import android.content.pm.PackageManager
+import androidx.core.content.ContextCompat
 import org.webrtc.MediaConstraints
 import org.webrtc.PeerConnectionFactory
 import org.webrtc.RtpSender
@@ -27,10 +31,17 @@ class LocalAudioTrack(
 
     companion object {
         internal fun createTrack(
+            context: Context,
             factory: PeerConnectionFactory,
             audioConstraints: MediaConstraints = MediaConstraints(),
             name: String = ""
         ): LocalAudioTrack {
+            if (ContextCompat.checkSelfPermission(context, Manifest.permission.RECORD_AUDIO) !=
+                PackageManager.PERMISSION_GRANTED
+            ) {
+                throw SecurityException("Record audio permissions are required to create an audio track.")
+            }
+
             val audioSource = factory.createAudioSource(audioConstraints)
             val rtcAudioTrack =
                 factory.createAudioTrack(UUID.randomUUID().toString(), audioSource)

 package io.livekit.android.room.track
 
+import android.Manifest
 import android.content.Context
+import android.content.pm.PackageManager
+import androidx.core.content.ContextCompat
 import io.livekit.android.util.LKLog
 import org.webrtc.*
 import java.util.*
@@ -83,6 +86,7 @@ class LocalVideoTrack(
     }
 
     companion object {
+
         internal fun createTrack(
             peerConnectionFactory: PeerConnectionFactory,
             context: Context,
@@ -90,6 +94,13 @@ class LocalVideoTrack(
             options: LocalVideoTrackOptions,
             rootEglBase: EglBase,
         ): LocalVideoTrack {
+
+            if (ContextCompat.checkSelfPermission(context, Manifest.permission.CAMERA) !=
+                PackageManager.PERMISSION_GRANTED
+            ) {
+                throw SecurityException("Camera permissions are required to create a camera video track.")
+            }
+
             val source = peerConnectionFactory.createVideoSource(options.isScreencast)
             val capturer = createVideoCapturer(context, options.position) ?: TODO()
             capturer.initialize(

@@ -52,7 +52,7 @@ dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation deps.kotlinx_coroutines
-    implementation 'androidx.core:core-ktx:1.6.0'
+    implementation "androidx.core:core-ktx:${versions.androidx_core}"
     implementation 'androidx.appcompat:appcompat:1.3.1'
     implementation 'com.google.android.material:material:1.4.0'
     implementation "androidx.compose.ui:ui:$compose_version"

@@ -5,8 +5,6 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
-    <uses-permission android:name="android.permission.RECORD_AUDIO" />
-    <uses-permission android:name="android.permission.CAMERA" />
 
     <application
         android:allowBackup="true"

@@ -38,7 +38,7 @@ dependencies {
     implementation deps.kotlinx_coroutines
     implementation 'com.google.android.material:material:1.3.0'
     implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'androidx.core:core-ktx:1.3.2'
+    implementation "androidx.core:core-ktx:${versions.androidx_core}"
     implementation "androidx.activity:activity-ktx:1.2.2"
     implementation 'androidx.fragment:fragment-ktx:1.3.2'
     implementation 'androidx.preference:preference:1.1.1'

@@ -4,8 +4,6 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
-    <uses-permission android:name="android.permission.RECORD_AUDIO" />
-    <uses-permission android:name="android.permission.CAMERA" />
 
     <application
         android:name=".SampleApplication"