Improve analytics

- Automatic page view tracking wasn't helpful since it was based on the Activities viewed, and SimpleMarkdown is a single-Activity app, so page views are now tracked manually
- User preferences are now reported so I can remove preferences that aren't used and focus my time on features that are actively used
- Opting out of crash reports is no longer possible. I need crash reports to be able to improve the app. It would also simplify the code a bit to not need to take that into account. Existing opt-outs will be respected but moving forward, new users will need to download the app from Fdroid if they'd like to avoid interactions with Google.

app/src/free/java/com/wbrawner/simplemarkdown/utility/AnalyticsHelper.kt

@@ -0,0 +1,19 @@
+package com.wbrawner.simplemarkdown.utility
+
+import android.content.Context
+import com.wbrawner.simplemarkdown.BuildConfig
+import timber.log.Timber
+
+class NoopAnalyticsHelper(context: Context): AnalyticsHelper() {
+    override fun setUserProperty(name: String, value: String) {
+        if (BuildConfig.DEBUG) {
+            Timber.tag("NoopAnalyticsHelper").d("setting user property $name to $value")
+        }
+    }
+
+    override fun trackPageView(name: String) {
+        Timber.tag("NoopAnalyticsHelper").d("user viewed $name page")
+    }
+}
+
+fun AnalyticsHelper.Companion.init(context: Context) = NoopAnalyticsHelper(context)

app/src/main/java/com/wbrawner/simplemarkdown/utility/AnalyticsHelper.kt

@@ -0,0 +1,8 @@
+package com.wbrawner.simplemarkdown.utility
+
+abstract class AnalyticsHelper {
+    abstract fun setUserProperty(name: String, value: String)
+    abstract fun trackPageView(name: String)
+
+    companion object
+}

app/src/main/java/com/wbrawner/simplemarkdown/view/activity/MainActivity.kt

@@ -1,16 +1,30 @@
 package com.wbrawner.simplemarkdown.view.activity
 
+import android.content.Context
 import android.os.Bundle
+import androidx.annotation.StringRes
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.app.ActivityCompat
 import androidx.navigation.findNavController
+import androidx.preference.PreferenceManager
 import com.wbrawner.simplemarkdown.R
+import com.wbrawner.simplemarkdown.utility.AnalyticsHelper
+import com.wbrawner.simplemarkdown.utility.init
 
 class MainActivity : AppCompatActivity(), ActivityCompat.OnRequestPermissionsResultCallback {
+    private val analyticsHelper = AnalyticsHelper.init(this)
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+        val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this)
+        analyticsHelper.setUserProperty("autosave", sharedPreferences.getBoolean("autosave", true).toString())
+        val usingCustomCss = !getStringPref(R.string.pref_custom_css, null).isNullOrBlank()
+        analyticsHelper.setUserProperty("using_custom_css", usingCustomCss.toString())
+        val darkModeSetting = getStringPref(R.string.pref_key_dark_mode, "auto").toString()
+        analyticsHelper.setUserProperty("dark_mode", darkModeSetting)
+        analyticsHelper.setUserProperty("error_reports_enabled", getBooleanPref(R.string.pref_key_error_reports_enabled, true).toString())
+        analyticsHelper.setUserProperty("readability_enabled", getBooleanPref(R.string.readability_enabled, false).toString())
     }
 
     override fun onBackPressed() {
@@ -19,3 +33,13 @@ class MainActivity : AppCompatActivity(), ActivityCompat.OnRequestPermissionsRes
         }
     }
 }
+
+fun Context.getBooleanPref(@StringRes key: Int, defaultValue: Boolean) = PreferenceManager.getDefaultSharedPreferences(this).getBoolean(
+    getString(key),
+    defaultValue
+)
+
+fun Context.getStringPref(@StringRes key: Int, defaultValue: String?) = PreferenceManager.getDefaultSharedPreferences(this).getString(
+    getString(key),
+    defaultValue
+)

app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/MainFragment.kt

@@ -23,8 +23,10 @@ import androidx.navigation.ui.AppBarConfiguration
 import androidx.navigation.ui.setupWithNavController
 import androidx.preference.PreferenceManager
 import com.wbrawner.simplemarkdown.R
+import com.wbrawner.simplemarkdown.utility.AnalyticsHelper
 import com.wbrawner.simplemarkdown.utility.ErrorHandler
 import com.wbrawner.simplemarkdown.utility.errorHandlerImpl
+import com.wbrawner.simplemarkdown.utility.init
 import com.wbrawner.simplemarkdown.view.adapter.EditPagerAdapter
 import com.wbrawner.simplemarkdown.viewmodel.MarkdownViewModel
 import kotlinx.android.synthetic.main.fragment_main.*
@@ -144,6 +146,7 @@ class MainFragment : Fragment(), ActivityCompat.OnRequestPermissionsResultCallba
 
     override fun onStart() {
         super.onStart()
+        AnalyticsHelper.init(requireContext()).trackPageView("Edit")
         lifecycleScope.launch {
             withContext(Dispatchers.IO) {
                 val enableErrorReports = PreferenceManager.getDefaultSharedPreferences(requireContext())

app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/MarkdownInfoFragment.kt

@@ -13,15 +13,13 @@ import androidx.lifecycle.lifecycleScope
 import androidx.navigation.fragment.findNavController
 import androidx.navigation.ui.setupWithNavController
 import com.wbrawner.simplemarkdown.R
-import com.wbrawner.simplemarkdown.utility.ErrorHandler
-import com.wbrawner.simplemarkdown.utility.errorHandlerImpl
-import com.wbrawner.simplemarkdown.utility.readAssetToString
-import com.wbrawner.simplemarkdown.utility.toHtml
+import com.wbrawner.simplemarkdown.utility.*
 import kotlinx.android.synthetic.main.fragment_markdown_info.*
 import kotlinx.coroutines.launch
 
 class MarkdownInfoFragment : Fragment() {
     private val errorHandler: ErrorHandler by errorHandlerImpl()
+    private lateinit var analyticsHelper: AnalyticsHelper
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -74,6 +72,13 @@ class MarkdownInfoFragment : Fragment() {
         return super.onOptionsItemSelected(item)
     }
 
+    override fun onStart() {
+        super.onStart()
+        arguments?.getString(EXTRA_FILE)?.let {
+            AnalyticsHelper.init(requireContext()).trackPageView(it)
+        }
+    }
+
     companion object {
         const val FORMAT_CSS = "<style>" +
                 "%s" +

app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SettingsContainerFragment.kt

@@ -9,6 +9,8 @@ import androidx.fragment.app.Fragment
 import androidx.navigation.fragment.findNavController
 import androidx.navigation.ui.setupWithNavController
 import com.wbrawner.simplemarkdown.R
+import com.wbrawner.simplemarkdown.utility.AnalyticsHelper
+import com.wbrawner.simplemarkdown.utility.init
 import kotlinx.android.synthetic.main.fragment_settings.*
 
 class SettingsContainerFragment : Fragment() {
@@ -25,4 +27,9 @@ class SettingsContainerFragment : Fragment() {
     }
 
     override fun onOptionsItemSelected(item: MenuItem): Boolean = findNavController().navigateUp()
+
+    override fun onStart() {
+        super.onStart()
+        AnalyticsHelper.init(requireContext()).trackPageView("Settings")
+    }
 }

app/src/main/java/com/wbrawner/simplemarkdown/view/fragment/SupportFragment.kt

@@ -13,7 +13,9 @@ import androidx.lifecycle.Observer
 import androidx.navigation.fragment.findNavController
 import androidx.navigation.ui.setupWithNavController
 import com.wbrawner.simplemarkdown.R
+import com.wbrawner.simplemarkdown.utility.AnalyticsHelper
 import com.wbrawner.simplemarkdown.utility.SupportLinkProvider
+import com.wbrawner.simplemarkdown.utility.init
 import kotlinx.android.synthetic.main.fragment_support.*
 
 class SupportFragment : Fragment() {
@@ -51,6 +53,11 @@ class SupportFragment : Fragment() {
         })
     }
 
+    override fun onStart() {
+        super.onStart()
+        AnalyticsHelper.init(requireContext()).trackPageView("Support")
+    }
+
     //    override fun onOptionsItemSelected(item: MenuItem): Boolean {
 //        if (item.itemId == android.R.id.home) {
 //            findNavController().navigateUp()

app/src/main/res/xml/pref_general.xml

@@ -17,12 +17,6 @@
         android:defaultValue="@string/pref_key_dark_mode_auto"
         android:key="@string/pref_key_dark_mode"
         android:title="@string/title_dark_mode" />
-    <SwitchPreference
-        android:defaultValue="true"
-        android:key="@string/pref_key_error_reports_enabled"
-        android:summaryOff="@string/pref_error_reports_off"
-        android:summaryOn="@string/pref_error_reports_on"
-        android:title="@string/pref_title_error_reports" />
     <SwitchPreference
         android:defaultValue="false"
         android:key="@string/readability_enabled"

app/src/play/AndroidManifest.xml

@@ -8,6 +8,9 @@
         <meta-data
             android:name="firebase_crashlytics_collection_enabled"
             android:value="false" />
+        <meta-data
+            android:name="google_analytics_automatic_screen_reporting_enabled"
+            android:value="false" />
     </application>
 
 </manifest>

app/src/play/java/com/wbrawner/simplemarkdown/utility/FirebaseAnalyticsHelper.kt

@@ -0,0 +1,19 @@
+package com.wbrawner.simplemarkdown.utility
+
+import android.content.Context
+import android.os.Bundle
+import com.google.firebase.analytics.FirebaseAnalytics
+
+class FirebaseAnalyticsHelper(context: Context): AnalyticsHelper() {
+    private val firebaseAnalytics = FirebaseAnalytics.getInstance(context)
+
+    override fun setUserProperty(name: String, value: String) {
+        firebaseAnalytics.setUserProperty(name, value)
+    }
+
+    override fun trackPageView(name: String) {
+        firebaseAnalytics.logEvent(FirebaseAnalytics.Event.SCREEN_VIEW, Bundle().apply { putString(FirebaseAnalytics.Param.SCREEN_NAME, name) })
+    }
+}
+
+fun AnalyticsHelper.Companion.init(context: Context) = FirebaseAnalyticsHelper(context)