Share Session Logs on Android

android/app/src/main/AndroidManifest.xml

@@ -15,6 +15,17 @@
         android:theme="@style/AppTheme"
         tools:ignore="GoogleAppIndexingWarning">
 
+        <provider
+            android:authorities="com.metallic.chiaki.fileprovider"
+            android:name="androidx.core.content.FileProvider"
+            android:grantUriPermissions="true"
+            android:exported="false">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/filepaths"
+                />
+        </provider>
+
         <activity android:name=".main.MainActivity"
             android:configChanges="keyboard|keyboardHidden|orientation|screenSize">
             <intent-filter>

android/app/src/main/java/com/metallic/chiaki/common/LogManager.kt

@@ -24,6 +24,8 @@ import java.text.SimpleDateFormat
 import java.util.*
 import java.util.regex.Pattern
 
+val fileProviderAuthority = "com.metallic.chiaki.fileprovider"
+private const val baseDirName = "session_logs" // must be in sync with filepaths.xml
 private val dateFormat = SimpleDateFormat("yyyy-MM-dd_HH-mm-ss-SSS", Locale.US)
 private const val filePrefix = "chiaki_session_"
 private const val filePostfix = ".log"
@@ -46,7 +48,7 @@ class LogFile private constructor(val logManager: LogManager, val filename: Stri
 
 class LogManager(context: Context)
 {
-	val baseDir = File(context.filesDir, "session_logs").also {
+	val baseDir = File(context.filesDir, baseDirName).also {
 		it.mkdirs()
 	}
 

android/app/src/main/java/com/metallic/chiaki/settings/SettingsLogsAdapter.kt

@@ -30,8 +30,10 @@ import java.util.*
 
 class SettingsLogsAdapter: RecyclerView.Adapter<SettingsLogsAdapter.ViewHolder>()
 {
-	val dateFormat: DateFormat = DateFormat.getDateInstance(DateFormat.SHORT)
-	val timeFormat = SimpleDateFormat("HH:mm:ss:SSS", Locale.getDefault())
+	var shareCallback: ((LogFile) -> Unit)? = null
+
+	private val dateFormat: DateFormat = DateFormat.getDateInstance(DateFormat.SHORT)
+	private val timeFormat = SimpleDateFormat("HH:mm:ss:SSS", Locale.getDefault())
 
 	class ViewHolder(itemView: View): RecyclerView.ViewHolder(itemView)
 
@@ -52,5 +54,6 @@ class SettingsLogsAdapter: RecyclerView.Adapter<SettingsLogsAdapter.ViewHolder>(
 		val logFile = logFiles[position]
 		view.nameTextView.text = "${dateFormat.format(logFile.date)} ${timeFormat.format(logFile.date)}"
 		view.summaryTextView.text = logFile.filename
+		view.shareButton.setOnClickListener { shareCallback?.let { it(logFile) } }
 	}
 }

android/app/src/main/java/com/metallic/chiaki/settings/SettingsLogsFragment.kt

@@ -17,20 +17,25 @@
 
 package com.metallic.chiaki.settings
 
+import android.content.ClipData
+import android.content.Intent
 import android.content.res.Resources
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.appcompat.app.AppCompatDialogFragment
+import androidx.core.content.FileProvider
 import androidx.lifecycle.Observer
 import androidx.lifecycle.ViewModelProviders
 import androidx.recyclerview.widget.ItemTouchHelper
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.metallic.chiaki.R
+import com.metallic.chiaki.common.LogFile
 import com.metallic.chiaki.common.LogManager
 import com.metallic.chiaki.common.ext.viewModelFactory
+import com.metallic.chiaki.common.fileProviderAuthority
 import kotlinx.android.synthetic.main.fragment_settings_logs.*
 
 class SettingsLogsFragment: AppCompatDialogFragment(), TitleFragment
@@ -51,6 +56,7 @@ class SettingsLogsFragment: AppCompatDialogFragment(), TitleFragment
 		val adapter = SettingsLogsAdapter()
 		logsRecyclerView.layoutManager = LinearLayoutManager(context)
 		logsRecyclerView.adapter = adapter
+		adapter.shareCallback = this::shareLogFile
 		viewModel.sessionLogs.observe(this, Observer {
 			adapter.logFiles = it
 			emptyInfoGroup.visibility = if(it.isEmpty()) View.VISIBLE else View.GONE
@@ -69,4 +75,18 @@ class SettingsLogsFragment: AppCompatDialogFragment(), TitleFragment
 	}
 
 	override fun getTitle(resources: Resources): String = resources.getString(R.string.preferences_logs_title)
+
+	private fun shareLogFile(file: LogFile)
+	{
+		val activity = activity ?: return
+		val uri = FileProvider.getUriForFile(activity, fileProviderAuthority, file.file)
+		Intent(Intent.ACTION_SEND).also {
+			it.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+			it.type = "text/plain"
+			it.putExtra(Intent.EXTRA_STREAM, uri)
+			it.clipData = ClipData.newRawUri("", uri)
+			startActivity(Intent.createChooser(it, resources.getString(R.string.action_share_log)))
+		}
+
+	}
 }

android/app/src/main/res/xml/filepaths.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths>
+    <files-path
+        name="session_logs"
+        path="session_logs/" /> <!-- must be in sync with LogManager -->
+</paths>