Export notification logs through document picker

app/src/main/java/se/ajpanton/notificationlog/ViewLogsFragment.kt

@@ -3,6 +3,7 @@ package se.ajpanton.notificationlog
 import android.os.Bundle
 import android.content.ComponentName
 import android.content.Intent
+import android.net.Uri
 import android.provider.Settings
 import android.view.View
 import android.widget.TextView
@@ -15,11 +16,17 @@ import se.ajpanton.notificationlog.settings.LogField
 import se.ajpanton.notificationlog.settings.LogViewSettingsStore
 import se.ajpanton.notificationlog.settings.TimestampZone
 import se.ajpanton.notificationlog.capture.NotificationCaptureService
+import se.ajpanton.notificationlog.export.LogExporter
+import java.util.zip.ZipOutputStream
 import java.text.DateFormat
 import java.util.Date
 
 class ViewLogsFragment : Fragment(R.layout.fragment_view_logs) {
     private var binding: FragmentViewLogsBinding? = null
+    private var pendingExport: ExportFormat? = null
+    private val createDocument = registerForActivityResult(androidx.activity.result.contract.ActivityResultContracts.CreateDocument("application/octet-stream")) { uri ->
+        uri?.let(::writeExport)
+    }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
@@ -27,6 +34,7 @@ class ViewLogsFragment : Fragment(R.layout.fragment_view_logs) {
         binding!!.notificationAccess.setOnClickListener {
             startActivity(Intent(Settings.ACTION_NOTIFICATION_LISTENER_SETTINGS))
         }
+        binding!!.exportLogs.setOnClickListener { chooseExportFormat() }
         binding!!.clearLogs.setOnClickListener {
             MaterialAlertDialogBuilder(requireContext())
                 .setTitle("Clear logs?")
@@ -90,4 +98,32 @@ class ViewLogsFragment : Fragment(R.layout.fragment_view_logs) {
             ComponentName(requireContext(), NotificationCaptureService::class.java),
         )
     }
+
+    private fun chooseExportFormat() {
+        MaterialAlertDialogBuilder(requireContext())
+            .setItems(arrayOf("CSV", "Formatted text", "HTML ZIP")) { _, which ->
+                pendingExport = ExportFormat.entries[which]
+                createDocument.launch("notification-log.${pendingExport!!.extension}")
+            }.show()
+    }
+
+    private fun writeExport(uri: Uri) {
+        val format = pendingExport ?: return
+        val context = requireContext().applicationContext
+        Thread {
+            val entries = EncryptedNotificationLogStore(context).readAll()
+            val settings = LogViewSettingsStore(context).load()
+            context.contentResolver.openOutputStream(uri)?.use { output -> when (format) {
+                ExportFormat.CSV -> output.write(LogExporter.csv(entries, settings).encodeToByteArray())
+                ExportFormat.FORMATTED -> output.write(LogExporter.formatted(entries, settings).encodeToByteArray())
+                ExportFormat.HTML_ZIP -> ZipOutputStream(output).use { zip ->
+                    zip.putNextEntry(java.util.zip.ZipEntry("notification-log.html"))
+                    zip.write(LogExporter.html(entries, settings).encodeToByteArray())
+                    zip.closeEntry()
+                }
+            } }
+        }.start()
+    }
+
+    private enum class ExportFormat(val extension: String) { CSV("csv"), FORMATTED("txt"), HTML_ZIP("zip") }
 }

app/src/main/res/layout/fragment_view_logs.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:padding="@dimen/page_padding">
- <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"><Button android:id="@+id/notification_access" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Enable notification access"/><Button android:id="@+id/clear_logs" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Clear logs" /></LinearLayout>
+ <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal"><Button android:id="@+id/notification_access" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Enable notification access"/><Button android:id="@+id/export_logs" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Export logs"/><Button android:id="@+id/clear_logs" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Clear logs" /></LinearLayout>
  <ScrollView android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1">
   <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical">
    <TextView android:id="@+id/empty_view" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="24dp" android:text="No logs yet." />