Introduce realtime log viewer

This contains a share button and a save button, the former using a
custom content provider.

Co-authored-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

14 files changed, 101 insertions, 15 deletions

diff --git a/ui/src/main/res/drawable/ic_action_share_white.xml b/ui/src/main/res/drawable/ic_action_share_white.xml
new file mode 100644
index 00000000..4ada554b
--- /dev/null
+++ b/ui/src/main/res/drawable/ic_action_share_white.xml
@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:fillColor="#FFFFFFFF"
+      android:pathData="M18,16.08c-0.76,0 -1.44,0.3 -1.96,0.77L8.91,12.7c0.05,-0.23 0.09,-0.46 0.09,-0.7s-0.04,-0.47 -0.09,-0.7l7.05,-4.11c0.54,0.5 1.25,0.81 2.04,0.81 1.66,0 3,-1.34 3,-3s-1.34,-3 -3,-3 -3,1.34 -3,3c0,0.24 0.04,0.47 0.09,0.7L8.04,9.81C7.5,9.31 6.79,9 6,9c-1.66,0 -3,1.34 -3,3s1.34,3 3,3c0.79,0 1.5,-0.31 2.04,-0.81l7.12,4.16c-0.05,0.21 -0.08,0.43 -0.08,0.65 0,1.61 1.31,2.92 2.92,2.92 1.61,0 2.92,-1.31 2.92,-2.92s-1.31,-2.92 -2.92,-2.92z"/>
+</vector>
diff --git a/ui/src/main/res/layout/log_viewer_activity.xml b/ui/src/main/res/layout/log_viewer_activity.xml
new file mode 100644
index 00000000..7a08bc88
--- /dev/null
+++ b/ui/src/main/res/layout/log_viewer_activity.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright © 2020 WireGuard LLC. All Rights Reserved.
+  ~ SPDX-License-Identifier: Apache-2.0
+  -->
+
+<androidx.coordinatorlayout.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/recycler_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:listitem="@layout/log_viewer_entry"
+        tools:itemCount="20" />
+
+    <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
+        style="@style/Widget.MaterialComponents.ExtendedFloatingActionButton.Icon"
+        android:id="@+id/share_fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_margin="@dimen/fab_margin"
+        app:icon="@drawable/ic_action_share_white" />
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
diff --git a/ui/src/main/res/layout/log_viewer_entry.xml b/ui/src/main/res/layout/log_viewer_entry.xml
new file mode 100644
index 00000000..37f8941d
--- /dev/null
+++ b/ui/src/main/res/layout/log_viewer_entry.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright © 2020 WireGuard LLC. All Rights Reserved.
+  ~ SPDX-License-Identifier: Apache-2.0
+  -->
+
+<androidx.constraintlayout.widget.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="6dp">
+    <com.google.android.material.textview.MaterialTextView
+        style="@style/TextAppearance.MaterialComponents.Caption"
+        android:id="@+id/log_date"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textColor="?android:attr/textColorPrimary"
+        android:textSize="10sp"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        tools:text="Fri Mar 13 10:17:37 GMT+05:30 2020" />
+
+    <com.google.android.material.textview.MaterialTextView
+        style="@style/TextAppearance.MaterialComponents.Caption"
+        android:id="@+id/log_msg"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textColor="?android:attr/textColorPrimary"
+        app:layout_constraintTop_toBottomOf="@id/log_date"
+        tools:text="FATAL EXCEPTION: Thread-2" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/ui/src/main/res/menu/log_viewer.xml b/ui/src/main/res/menu/log_viewer.xml
new file mode 100644
index 00000000..3a9da698
--- /dev/null
+++ b/ui/src/main/res/menu/log_viewer.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/save_log"
+        android:icon="@drawable/ic_action_save"
+        android:title="@string/log_export_title"
+        app:showAsAction="ifRoom"/>
+</menu>
diff --git a/ui/src/main/res/values-hi/strings.xml b/ui/src/main/res/values-hi/strings.xml
index c79341d7..bda0cbb2 100644
--- a/ui/src/main/res/values-hi/strings.xml
+++ b/ui/src/main/res/values-hi/strings.xml
@@ -88,9 +88,7 @@
     <string name="key_length_explanation_binary">: वायरगार्ड कीज 32 बाइट होनी चाहिए</string>
     <string name="key_length_explanation_hex">: वायरगार्ड हेक्स कीज़ 64 अक्षरों की होनी चाहिए (32 बाइट्स)</string>
     <string name="listen_port">पोर्ट सूने</string>
-    <string name="log_export_error">लॉग निर्यात करने में असमर्थ: %s</string>
     <string name="log_export_success">“%s” में सहेजा गया</string>
-    <string name="log_export_summary">लॉग फ़ाइल को डाउनलोड फ़ोल्डर में सहेजा जाएगा</string>
     <string name="log_export_title">लॉग फ़ाइल निर्यात करें</string>
     <string name="logcat_error">लॉगकैट चलाने में असमर्थ: </string>
     <string name="module_version_error">कर्नेल मॉड्यूल संस्करण निर्धारित करने में असमर्थ</string>
diff --git a/ui/src/main/res/values-id/strings.xml b/ui/src/main/res/values-id/strings.xml
index 7c6c6a0b..3f0af404 100644
--- a/ui/src/main/res/values-id/strings.xml
+++ b/ui/src/main/res/values-id/strings.xml
@@ -88,9 +88,7 @@
     <string name="key_length_explanation_binary">: Kunci WireGuard harus terdiri dari 32 bit</string>
     <string name="key_length_explanation_hex">: Kunci hex WireGuard Harus terdiri dari 64 karakter (32 bit)</string>
     <string name="listen_port">Isi port</string>
-    <string name="log_export_error">Log %s tidak bisa diekspor</string>
     <string name="log_export_success">Simpan ke “%s”</string>
-    <string name="log_export_summary">File log akan disimpan di folder download</string>
     <string name="log_export_title">Ekspor file log</string>
     <string name="logcat_error">Tidak bisa menjalankan logcat: </string>
     <string name="module_version_error">Tidak dapat menentukan versi modul kernel</string>
diff --git a/ui/src/main/res/values-it/strings.xml b/ui/src/main/res/values-it/strings.xml
index 48f36a2b..2ab211e9 100644
--- a/ui/src/main/res/values-it/strings.xml
+++ b/ui/src/main/res/values-it/strings.xml
@@ -88,9 +88,7 @@
     <string name="key_length_explanation_binary">: le chiavi di WireGuard devono essere di 32 byte</string>
     <string name="key_length_explanation_hex">: le chiavi hex di WireGuard devono essere di 64 caratteri (32 byte)</string>
     <string name="listen_port">Porta in ascolto</string>
-    <string name="log_export_error">Impossibile esportare il registro: %s</string>
     <string name="log_export_success">Salvato in “%s”</string>
-    <string name="log_export_summary">Il file del registro verrà salvato nella cartella di download</string>
     <string name="log_export_title">Esporta file registro</string>
     <string name="logcat_error">Impossibile eseguire logcat: </string>
     <string name="module_version_error">Impossibile determinare la versione modulo del kernel</string>
diff --git a/ui/src/main/res/values-ja/strings.xml b/ui/src/main/res/values-ja/strings.xml
index c753a5d5..5d342d2d 100644
--- a/ui/src/main/res/values-ja/strings.xml
+++ b/ui/src/main/res/values-ja/strings.xml
@@ -84,9 +84,7 @@
     <string name="key_length_explanation_binary">: WireGuard 鍵は32バイトでなければなりません</string>
     <string name="key_length_explanation_hex">: WireGuard hex 鍵は64文字（32バイト）でなければなりません</string>
     <string name="listen_port">Listen ポート</string>
-    <string name="log_export_error">ログをエクスポートできません: %s</string>
     <string name="log_export_success">“%s” に保存しました</string>
-    <string name="log_export_summary">ログはダウンロードフォルダに保存されます</string>
     <string name="log_export_title">ログのエクスポート</string>
     <string name="logcat_error">logcat を実行できません: </string>
     <string name="module_version_error">カーネルモジュールバージョンを特定できません</string>
diff --git a/ui/src/main/res/values-night/colors.xml b/ui/src/main/res/values-night/colors.xml
index 314142d9..e1015da8 100644
--- a/ui/src/main/res/values-night/colors.xml
+++ b/ui/src/main/res/values-night/colors.xml
@@ -14,4 +14,10 @@
     <color name="list_multiselect_background">#1aeeeeee</color>
     <color name="status_bar_color">#21242424</color>
     <color name="navigation_bar_color">#aa242424</color>
+
+    <!-- Log viewer tag colors -->
+    <color name="debug_tag_color">#aaaaaa</color>
+    <color name="error_tag_color">#ff0000</color>
+    <color name="info_tag_color">#00ff00</color>
+    <color name="warning_tag_color">#ffff00</color>
 </resources>
diff --git a/ui/src/main/res/values-ru/strings.xml b/ui/src/main/res/values-ru/strings.xml
index 557ce196..519ec24e 100644
--- a/ui/src/main/res/values-ru/strings.xml
+++ b/ui/src/main/res/values-ru/strings.xml
@@ -93,9 +93,7 @@
     <string name="key_length_explanation_binary">: Ключи WireGuard должны быть 32 байта</string>
     <string name="key_length_explanation_hex">: HEX ключи WireGuard должны содержать 64 символа (32 байта)</string>
     <string name="listen_port">Порт</string>
-    <string name="log_export_error">Не удалось экспортировать логи: %s</string>
     <string name="log_export_success">Сохранено в “%s”</string>
-    <string name="log_export_summary">Файл логов будет сохранен в папке загрузок</string>
     <string name="log_export_title">Экспорт логов в файл</string>
     <string name="logcat_error">Не удалось запустить logcat: </string>
     <string name="module_version_error">Не удалось определить версию модуля ядра</string>
diff --git a/ui/src/main/res/values-zh-rCN/strings.xml b/ui/src/main/res/values-zh-rCN/strings.xml
index 613abf46..4e3730f1 100644
--- a/ui/src/main/res/values-zh-rCN/strings.xml
+++ b/ui/src/main/res/values-zh-rCN/strings.xml
@@ -82,9 +82,7 @@
     <string name="key_length_explanation_binary">：WireGuard 密钥大小必须为 32 字节</string>
     <string name="key_length_explanation_hex">：WireGuard 的十六进制密钥长度必须为 64 个字符（32 字节）</string>
     <string name="listen_port">监听端口</string>
-    <string name="log_export_error">无法导出日志：%s</string>
     <string name="log_export_success">已保存至 “%s”</string>
-    <string name="log_export_summary">日志文件将保存至下载文件夹</string>
     <string name="log_export_title">导出日志文件</string>
     <string name="logcat_error">无法运行 logcat：</string>
     <string name="module_version_error">无法确定内核模块版本</string>
diff --git a/ui/src/main/res/values/colors.xml b/ui/src/main/res/values/colors.xml
index 06bcd143..bd304726 100644
--- a/ui/src/main/res/values/colors.xml
+++ b/ui/src/main/res/values/colors.xml
@@ -18,4 +18,9 @@
     <color name="mtrl_textinput_default_box_stroke_color" tools:override="true">@color/secondary_color</color>
     <color name="white">#ffffffff</color>
 
+    <!-- Log viewer tag colors -->
+    <color name="debug_tag_color">#444444</color>
+    <color name="error_tag_color">#aa0000</color>
+    <color name="info_tag_color">#00aa00</color>
+    <color name="warning_tag_color">#aaaa00</color>
 </resources>
diff --git a/ui/src/main/res/values/strings.xml b/ui/src/main/res/values/strings.xml
index 74c5be69..972b6244 100644
--- a/ui/src/main/res/values/strings.xml
+++ b/ui/src/main/res/values/strings.xml
@@ -93,10 +93,9 @@
     <string name="key_length_explanation_binary">: WireGuard keys must be 32 bytes</string>
     <string name="key_length_explanation_hex">: WireGuard hex keys must be 64 characters (32 bytes)</string>
     <string name="listen_port">Listen port</string>
-    <string name="log_export_error">Unable to export log: %s</string>
     <string name="log_export_success">Saved to “%s”</string>
-    <string name="log_export_summary">Log file will be saved to downloads folder</string>
     <string name="log_export_title">Export log file</string>
+    <string name="log_export_subject">WireGuard Android Log File</string>
     <string name="logcat_error">Unable to run logcat: </string>
     <string name="module_version_error">Unable to determine kernel module version</string>
     <string name="module_installer_not_found">No modules are available for your device</string>
@@ -186,4 +185,7 @@
     <string name="zip_export_title">Export tunnels to zip file</string>
     <string name="key_length_error">Incorrect key length</string>
     <string name="key_contents_error">Bad characters in key</string>
+    <string name="log_viewer_title">View application log</string>
+    <string name="log_viewer_pref_summary">Logs may assist with debugging</string>
+    <string name="log_saver_activity_label">Save log</string>
 </resources>
diff --git a/ui/src/main/res/xml/preferences.xml b/ui/src/main/res/xml/preferences.xml
index 4668fab4..06d7ac7c 100644
--- a/ui/src/main/res/xml/preferences.xml
+++ b/ui/src/main/res/xml/preferences.xml
@@ -8,7 +8,10 @@
         android:summaryOff="@string/restore_on_boot_summary_off"
         android:title="@string/restore_on_boot_title" />
     <com.wireguard.android.preference.ZipExporterPreference />
-    <com.wireguard.android.preference.LogExporterPreference />
+    <Preference
+        android:key="log_viewer"
+        android:title="@string/log_viewer_title"
+        android:summary="@string/log_viewer_pref_summary" />
     <CheckBoxPreference
         android:defaultValue="false"
         android:key="dark_theme"