Several small nitpicks and fixes

.gitignore

@@ -40,7 +40,6 @@ nb-configuration.xml
 ## Gradle
 .gradle
 gradle-app.setting
-build/
 
 ## OS Specific
 .DS_Store

.travis.yml

@@ -1,7 +1,7 @@
 language: android
 android:
   components:
-  - build-tools-28.0.0
+  - build-tools-28.0.3
   - android-28
 deploy:
   provider: releases

app/build.gradle

@@ -3,13 +3,18 @@ import groovy.xml.XmlUtil
 apply plugin: 'com.android.application'
 
 android {
+
     compileSdkVersion 28
-    buildToolsVersion '28.0.0'
+    buildToolsVersion '28.0.3'
+
+    defaultConfig {
+        minSdkVersion 26
+        targetSdkVersion 26
+    }
 
     buildTypes {
         release {
             minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
 
@@ -28,9 +33,7 @@ gradle.projectsEvaluated {
     }
 }
 
-preBuild {
-
-    doLast {
+preBuild.doLast {
     def imlFile = file(project.name + ".iml")
 
     try {
@@ -42,14 +45,13 @@ preBuild {
         new Node(parsedXml.component[1], 'orderEntry', ['type': 'jdk', 'jdkName': sdkString, 'jdkType': 'Android SDK'])
         XmlUtil.serialize(parsedXml, new FileOutputStream(imlFile))
 
-        } catch (FileNotFoundException ex) {
+    } catch (NullPointerException | FileNotFoundException ex) {
         ex.printStackTrace()
     }
-    }
 }
 
 dependencies {
     compileOnly fileTree(include: ['android.jar', 'libcore.jar'], dir: 'libs')
 
-    compile group: 'commons-io', name: 'commons-io', version: '2.6'
+    implementation group: 'commons-io', name: 'commons-io', version: '2.6'
 }

app/src/main/AndroidManifest.xml

@@ -5,12 +5,14 @@
     android:versionCode="5"
     android:versionName="0.3.0">
 
-    <uses-permission android:name="android.permission.BACKUP" />
-
     <uses-sdk
         android:minSdkVersion="26"
         android:targetSdkVersion="26" />
 
+    <uses-permission
+        android:name="android.permission.BACKUP"
+        tools:ignore="ProtectedPermissions" />
+
     <application
         android:name=".Backup"
         android:supportsRtl="true"
@@ -18,9 +20,11 @@
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:allowBackup="false"
-        tools:replace="android:allowBackup">
+        tools:ignore="GoogleAppIndexingWarning">
 
-        <activity android:name="com.stevesoltys.backup.activity.MainActivity">
+        <activity
+            android:name="com.stevesoltys.backup.activity.MainActivity"
+            android:label="@string/app_name">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />

app/src/main/java/com/stevesoltys/backup/session/backup/BackupSession.java

@@ -39,17 +39,17 @@ public class BackupSession extends IBackupObserver.Stub {
     }
 
     @Override
-    public void onUpdate(String currentPackage, BackupProgress backupProgress) throws RemoteException {
+    public void onUpdate(String currentPackage, BackupProgress backupProgress) {
         backupSessionObserver.backupPackageStarted(this, currentPackage, backupProgress);
     }
 
     @Override
-    public void onResult(String currentPackage, int status) throws RemoteException {
+    public void onResult(String currentPackage, int status) {
         backupSessionObserver.backupPackageCompleted(this, currentPackage, getBackupResult(status));
     }
 
     @Override
-    public void backupFinished(int status) throws RemoteException {
+    public void backupFinished(int status) {
         backupSessionObserver.backupSessionCompleted(this, getBackupResult(status));
     }
 

app/src/main/java/com/stevesoltys/backup/session/restore/RestoreSession.java

@@ -71,12 +71,12 @@ public class RestoreSession extends IRestoreObserver.Stub {
     }
 
     @Override
-    public void restoreStarting(int numPackages) throws RemoteException {
+    public void restoreStarting(int numPackages) {
         observer.restoreSessionStarted(numPackages);
     }
 
     @Override
-    public void onUpdate(int nowBeingRestored, String currentPackage) throws RemoteException {
+    public void onUpdate(int nowBeingRestored, String currentPackage) {
         observer.restorePackageStarted(nowBeingRestored, currentPackage);
     }
 

app/src/main/java/com/stevesoltys/backup/transport/ConfigurableBackupTransport.java

@@ -24,7 +24,7 @@ public class ConfigurableBackupTransport extends BackupTransport {
 
     private RestoreComponent restoreComponent;
 
-    public ConfigurableBackupTransport() {
+    ConfigurableBackupTransport() {
         backupComponent = new StubBackupComponent();
         restoreComponent = new StubRestoreComponent();
     }
@@ -47,14 +47,6 @@ public class ConfigurableBackupTransport extends BackupTransport {
         return !(backupComponent instanceof StubBackupComponent || restoreComponent instanceof StubRestoreComponent);
     }
 
-    public BackupComponent getBackupComponent() {
-        return backupComponent;
-    }
-
-    public RestoreComponent getRestoreComponent() {
-        return restoreComponent;
-    }
-
     @Override
     public String transportDirName() {
         return TRANSPORT_DIRECTORY_NAME;

app/src/main/java/com/stevesoltys/backup/transport/ConfigurableBackupTransportService.java

@@ -26,7 +26,6 @@ public class ConfigurableBackupTransportService extends Service {
     @Override
     public void onCreate() {
         super.onCreate();
-
         startForeground(FOREGROUND_ID, new Notification.Builder(this).build());
     }
 

app/src/main/java/com/stevesoltys/backup/transport/component/provider/ContentProviderRestoreComponent.java

@@ -8,15 +8,18 @@ import android.content.pm.PackageInfo;
 import android.os.ParcelFileDescriptor;
 import android.util.Base64;
 import android.util.Log;
+
 import com.android.internal.util.Preconditions;
 import com.stevesoltys.backup.security.CipherUtil;
 import com.stevesoltys.backup.security.KeyGenerator;
 import com.stevesoltys.backup.transport.component.RestoreComponent;
-import libcore.io.IoUtils;
-import libcore.io.Streams;
 
-import javax.crypto.SecretKey;
-import java.io.*;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
 import java.util.Arrays;
 import java.util.LinkedList;
 import java.util.List;
@@ -24,7 +27,15 @@ import java.util.Optional;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
-import static android.app.backup.BackupTransport.*;
+import javax.crypto.SecretKey;
+
+import libcore.io.IoUtils;
+import libcore.io.Streams;
+
+import static android.app.backup.BackupTransport.NO_MORE_DATA;
+import static android.app.backup.BackupTransport.TRANSPORT_ERROR;
+import static android.app.backup.BackupTransport.TRANSPORT_OK;
+import static android.app.backup.BackupTransport.TRANSPORT_PACKAGE_REJECTED;
 import static android.app.backup.RestoreDescription.TYPE_FULL_STREAM;
 import static android.app.backup.RestoreDescription.TYPE_KEY_VALUE;
 
@@ -310,7 +321,7 @@ public class ContentProviderRestoreComponent implements RestoreComponent {
         return contentResolver.openFileDescriptor(configuration.getUri(), "r");
     }
 
-    private ZipInputStream buildInputStream(ParcelFileDescriptor inputFileDescriptor) throws FileNotFoundException {
+    private ZipInputStream buildInputStream(ParcelFileDescriptor inputFileDescriptor) {
         FileInputStream fileInputStream = new FileInputStream(inputFileDescriptor.getFileDescriptor());
         return new ZipInputStream(fileInputStream);
     }

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

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout 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:id="@+id/activity_create_backup"
     android:layout_width="match_parent"

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

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout 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:id="@+id/activity_main"
               android:layout_width="match_parent"

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

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout 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:id="@+id/activity_restore_backup"
               android:layout_width="match_parent"

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

@@ -1,28 +1,30 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/popup_layout"
+    android:layout_width="@dimen/popup_width"
+    android:layout_height="@dimen/popup_height"
     android:orientation="vertical">
 
     <TextView
         android:id="@+id/popup_text_view"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:textAlignment="center"/>
+        android:textAlignment="center" />
 
     <ProgressBar
         android:id="@+id/popup_progress_bar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginLeft="@dimen/progress_bar_horizontal_margin"
-        android:layout_marginRight="@dimen/progress_bar_horizontal_margin"/>
+        android:layout_marginRight="@dimen/progress_bar_horizontal_margin" />
 
     <Button
         android:id="@+id/popup_cancel_button"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_marginLeft="@dimen/button_horizontal_margin"
-        android:layout_marginRight="@dimen/button_horizontal_margin"
         android:layout_marginTop="@dimen/button_vertical_margin"
-        android:text="@string/popup_cancel"/>
+        android:layout_marginRight="@dimen/button_horizontal_margin"
+        android:text="@string/popup_cancel" />
 
 </LinearLayout>

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

@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<resources>
-    <string-array name="packages">
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-        <item>package</item>
-    </string-array>
-</resources>

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

@@ -4,7 +4,6 @@
     <string name="create_backup_button">Create backup</string>
     <string name="restore_backup_button">Restore backup</string>
 
-    <string name="backup_button">Backup packages</string>
     <string name="backup_success">Backup success</string>
     <string name="backup_failure">Backup failure</string>
     <string name="backup_cancelled">Backup cancelled</string>

build.gradle

@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.0'
+        classpath 'com.android.tools.build:gradle:3.4.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,5 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
+distributionSha256Sum=14cd15fc8cc8705bd69dcfa3c8fefb27eb7027f5de4b47a8b279218f76895a91