add license notice for bundled libraries

- also upgrade build tools and dependencies
- also remove unused transient dependency volley
-- pulled in by hyperlog to enable pushing logs to a webserver (unused)
-- problematic because license (APL2) is not declared in its POM

app/.gitignore

@@ -1 +1,2 @@
 /build
+/src/main/assets/open_source_licenses.html

app/build.gradle

@@ -1,3 +1,7 @@
+plugins {
+    id "com.jaredsburrows.license" version "0.8.42"
+}
+
 apply plugin: 'com.android.application'
 
 android {
@@ -6,8 +10,8 @@ android {
         applicationId "org.ostrya.presencepublisher"
         minSdkVersion 14
         targetSdkVersion 28
-        versionCode 11
-        versionName "1.5.2"
+        versionCode 12
+        versionName "1.5.3"
     }
     signingConfigs {
         release {
@@ -36,12 +40,17 @@ android {
     buildToolsVersion '28.0.3'
 }
 
+afterEvaluate {
+    preBuild.dependsOn(licenseDebugReport)
+}
+
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation 'androidx.appcompat:appcompat:1.0.2'
-    implementation 'androidx.preference:preference:1.1.0-beta01'
+    implementation 'androidx.preference:preference:1.1.0-rc01'
     implementation('com.hypertrack:hyperlog:0.0.10') {
-        exclude group: 'com.android.support', module: 'appcompat-v7'
+        exclude group: 'com.android.support'
+        exclude group: 'com.android.volley'
     }
     implementation 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.2.0'
 }

app/src/main/java/org/ostrya/presencepublisher/ui/LicenseFragment.java

@@ -0,0 +1,24 @@
+package org.ostrya.presencepublisher.ui;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.webkit.WebView;
+import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
+
+public class LicenseFragment extends Fragment {
+
+    public LicenseFragment() {
+        // Required empty public constructor
+    }
+
+    @Override
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        WebView webView = new WebView(requireActivity());
+        webView.loadUrl("file:///android_asset/open_source_licenses.html");
+        return webView;
+    }
+}

app/src/main/java/org/ostrya/presencepublisher/ui/LogFragment.java

@@ -7,6 +7,7 @@
 import android.view.ViewGroup;
 import android.widget.Button;
 import android.widget.Toast;
+import androidx.annotation.NonNull;
 import androidx.fragment.app.Fragment;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
@@ -39,7 +40,7 @@ private static void exportLogs(View view) {
     }
 
     @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.fragment_log_list, container, false);
         RecyclerView recyclerView = view.findViewById(R.id.list);

app/src/main/java/org/ostrya/presencepublisher/ui/MainPagerAdapter.java

@@ -29,12 +29,14 @@ public Fragment getItem(int position) {
                 return new ContentFragment();
             case 3:
                 return new LogFragment();
+            case 4:
+                return new LicenseFragment();
         }
     }
 
     @Override
     public int getCount() {
-        return 4;
+        return 5;
     }
 
     @Nullable
@@ -49,6 +51,8 @@ public CharSequence getPageTitle(int position) {
                 return context.getString(R.string.tab_content_title);
             case 3:
                 return context.getString(R.string.tab_log_title);
+            case 4:
+                return context.getString(R.string.tab_licenses_title);
         }
         return null;
     }

app/src/main/res/values-de/strings.xml

@@ -62,4 +62,5 @@
     <string name="toast_no_logs">Keine Logs vorhanden</string>
     <string name="button_reload">Neu laden</string>
     <string name="button_clear">Löschen</string>
+    <string name="tab_licenses_title">Lizenzen</string>
 </resources>

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

@@ -61,4 +61,5 @@
     <string name="button_clear">Clear</string>
     <string name="button_export">Export</string>
     <string name="toast_no_logs">No logs available</string>
+    <string name="tab_licenses_title">Licenses</string>
 </resources>

build.gradle

@@ -1,14 +1,14 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    
+
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.1'
-        
+        classpath 'com.android.tools.build:gradle:3.4.2'
+
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5.1-all.zip