Option to persist task in video sample app.

video/app/src/main/java/org/thoughtcrime/video/app/MainActivity.kt

@@ -7,6 +7,7 @@ package org.thoughtcrime.video.app
 
 import android.content.Context
 import android.content.Intent
+import android.content.SharedPreferences
 import android.media.MediaScannerConnection
 import android.os.Bundle
 import android.os.Environment
@@ -14,11 +15,20 @@ import androidx.activity.compose.setContent
 import androidx.appcompat.app.AppCompatActivity
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.Checkbox
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
 import org.signal.core.util.logging.Log
 import org.thoughtcrime.video.app.playback.PlaybackTestActivity
 import org.thoughtcrime.video.app.transcode.TranscodeTestActivity
@@ -29,30 +39,85 @@ import org.thoughtcrime.video.app.ui.theme.SignalTheme
  * Main activity for this sample app.
  */
 class MainActivity : AppCompatActivity() {
-  private val TAG = Log.tag(MainActivity::class.java)
+  companion object {
+    private val TAG = Log.tag(MainActivity::class.java)
+    private var appLaunch = true
+  }
+
+  private val sharedPref: SharedPreferences by lazy {
+    getSharedPreferences(
+      getString(R.string.preference_file_key),
+      Context.MODE_PRIVATE
+    )
+  }
 
   override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
-    val startPlaybackScreen = Intent(this, PlaybackTestActivity::class.java)
+    val startPlaybackScreen = { saveChoice: Boolean -> proceed(Screen.TEST_PLAYBACK, saveChoice) }
-    val startTranscodeScreen = Intent(this, TranscodeTestActivity::class.java)
+    val startTranscodeScreen = { saveChoice: Boolean -> proceed(Screen.TEST_TRANSCODE, saveChoice) }
     setContent {
-      SignalTheme {
+      Body(startPlaybackScreen, startTranscodeScreen)
-        Surface(modifier = Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.background) {
+    }
-          Column(
+    refreshMediaProviderForExternalStorage(this, arrayOf("video/*"))
-            verticalArrangement = Arrangement.Center,
+    if (appLaunch) {
-            horizontalAlignment = Alignment.CenterHorizontally
+      appLaunch = false
+      getLaunchChoice()?.let {
+        proceed(it, false)
+      }
+    }
+  }
+
+  @Composable
+  private fun Body(startPlaybackScreen: (Boolean) -> Unit, startTranscodeScreen: (Boolean) -> Unit) {
+    var rememberChoice by remember { mutableStateOf(getLaunchChoice() != null) }
+    SignalTheme {
+      Surface(modifier = Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.background) {
+        Column(
+          verticalArrangement = Arrangement.Center,
+          horizontalAlignment = Alignment.CenterHorizontally
+        ) {
+          LabeledButton("Test Playback") {
+            startPlaybackScreen(rememberChoice)
+          }
+          LabeledButton("Test Transcode") {
+            startTranscodeScreen(rememberChoice)
+          }
+          Row(
+            verticalAlignment = Alignment.CenterVertically
           ) {
-            LabeledButton("Test Playback") { startActivity(startPlaybackScreen) }
+            Checkbox(
-            LabeledButton("Test Transcode") { startActivity(startTranscodeScreen) }
+              checked = rememberChoice,
+              onCheckedChange = { isChecked ->
+                rememberChoice = isChecked
+                if (!isChecked) {
+                  clearLaunchChoice()
+                }
+              }
+            )
+            Text(text = "Remember & Skip This Screen", style = MaterialTheme.typography.labelLarge)
           }
         }
       }
     }
   }
 
-  override fun onStart() {
+  private fun getLaunchChoice(): Screen? {
-    super.onStart()
+    val screenName = sharedPref.getString(getString(R.string.preference_activity_shortcut_key), null) ?: return null
-    refreshMediaProviderForExternalStorage(this, arrayOf("video/*"))
+    return Screen.valueOf(screenName)
+  }
+
+  private fun clearLaunchChoice() {
+    with(sharedPref.edit()) {
+      remove(getString(R.string.preference_activity_shortcut_key))
+      apply()
+    }
+  }
+
+  private fun saveLaunchChoice(choice: Screen) {
+    with(sharedPref.edit()) {
+      putString(getString(R.string.preference_activity_shortcut_key), choice.name)
+      apply()
+    }
   }
 
   private fun refreshMediaProviderForExternalStorage(context: Context, mimeTypes: Array<String>) {
@@ -65,4 +130,25 @@ class MainActivity : AppCompatActivity() {
       Log.i(TAG, "Re-scan of external storage for media completed.")
     }
   }
+
+  private fun proceed(screen: Screen, saveChoice: Boolean) {
+    if (saveChoice) {
+      saveLaunchChoice(screen)
+    }
+    when (screen) {
+      Screen.TEST_PLAYBACK -> startActivity(Intent(this, PlaybackTestActivity::class.java))
+      Screen.TEST_TRANSCODE -> startActivity(Intent(this, TranscodeTestActivity::class.java))
+    }
+  }
+
+  private enum class Screen {
+    TEST_PLAYBACK,
+    TEST_TRANSCODE
+  }
+
+  @Preview
+  @Composable
+  private fun PreviewBody() {
+    Body({}, {})
+  }
 }

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

@@ -10,4 +10,6 @@
     <string name="cancel_transcode">Cancel</string>
     <string name="channel_name">Transcoding progress updates.</string>
     <string name="channel_description">Persistent notifications that allow the transcode job to complete when the app is in the background.</string>
+    <string name="preference_file_key">settings</string>
+    <string name="preference_activity_shortcut_key">activity_shortcut</string>
 </resources>