Simplify changing the wallpaper - stop using an IntentService

.gitignore

@@ -1,3 +1,7 @@
+
+# Created by https://www.gitignore.io/api/android,intellij+iml,java,gradle
+
+### Android ###
 # Built application files
 *.apk
 *.ap_
@@ -35,7 +39,99 @@ captures/
 # Intellij
 *.iml
 .idea/workspace.xml
+.idea/tasks.xml
 .idea/libraries
 
 # Keystore files
-*.jks
+*.jks
+
+# External native build folder generated in Android Studio 2.2 and later
+.externalNativeBuild
+
+### Android Patch ###
+gen-external-apklibs
+
+
+### Intellij+iml ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff:
+
+# Sensitive or high-churn files:
+.idea/dataSources/
+.idea/dataSources.ids
+.idea/dataSources.xml
+.idea/dataSources.local.xml
+.idea/sqlDataSources.xml
+.idea/dynamic.xml
+.idea/uiDesigner.xml
+
+# Gradle:
+.idea/gradle.xml
+
+# Mongo Explorer plugin:
+.idea/mongoSettings.xml
+
+## File-based project format:
+*.iws
+
+## Plugin-specific files:
+
+# IntelliJ
+/out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+### Intellij+iml Patch ###
+# Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-249601023
+
+modules.xml
+.idea/misc.xml
+*.ipr
+
+
+### Java ###
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+
+### Gradle ###
+.gradle
+/build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Cache of project
+.gradletasknamecache
+
+# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
+# gradle/wrapper/gradle-wrapper.properties
+
+# End of https://www.gitignore.io/api/android,intellij+iml,java,gradle

app/build.gradle

@@ -1,14 +1,15 @@
 apply plugin: 'com.android.application'
 
+//noinspection GroovyMissingReturnStatement
 android {
-    compileSdkVersion 24
-    buildToolsVersion '24.0.2'
+    compileSdkVersion 25
+    buildToolsVersion '25.0.2'
     defaultConfig {
         applicationId "com.appgramming.lonecolor"
         minSdkVersion 11
-        targetSdkVersion 24
+        targetSdkVersion 25
         versionCode 5
-        versionName '2.0-beta'
+        versionName '2.0'
     }
     buildTypes {
         release {

app/src/main/AndroidManifest.xml

@@ -14,7 +14,7 @@
         android:theme="@style/AppTheme"
         tools:ignore="GoogleAppIndexingWarning">
         <activity
-            android:name=".StartActivity"
+            android:name=".LoneColorActivity"
             android:excludeFromRecents="true"
             android:label="@string/app_name">
             <intent-filter>
@@ -24,9 +24,6 @@
             </intent-filter>
         </activity>
 
-        <service
-            android:name=".LoneColorWallpaperService"
-            android:exported="false"/>
     </application>
 
 </manifest>

app/src/main/java/com/appgramming/lonecolor/LoneColorActivity.java

@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2014-2016 Appgramming
+ * http://www.appgramming.com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.appgramming.lonecolor;
+
+import android.app.Activity;
+import android.os.Bundle;
+
+import com.appgramming.lonecolor.utils.ColorClipboardParameter;
+import com.appgramming.lonecolor.utils.ColorWallpaper;
+import com.appgramming.lonecolor.utils.GoodRandomColor;
+import com.appgramming.lonecolor.utils.Utils;
+
+import java.io.IOException;
+
+/**
+ * LoneColor zero interface activity: just sets the color wallpaper and finishes.
+ */
+public class LoneColorActivity extends Activity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // Set the color wallpaper
+        setColorWallpaper();
+
+        // Finish the activity
+        finish();
+    }
+
+    /**
+     * Sets the color wallpaper to the color value in the Clipboard, or to a random color.
+     */
+    private void setColorWallpaper() {
+
+        // Try to get the color parameter from the clipboard
+        Integer colorParam = null;
+        try {
+            colorParam = ColorClipboardParameter.getColor(getApplication());
+        } catch (Exception ignored) {
+            // An unexpected exception while trying to get the color code from the clipboard
+            // can crash the app at startup. Ignore any exceptions, we will generate a random
+            // color anyway.
+        }
+
+        // If there is no valid color value in the clipboard, generate a random color
+        final int color = (colorParam != null) ? colorParam : GoodRandomColor.nextColor();
+
+        try {
+            // Set the color wallpaper
+            ColorWallpaper.setColorWallpaper(this, color);
+
+            // Success: copy the color code to the clipboard
+            Utils.copyText(this, Utils.colorToHex(color));
+
+            // Go to the home screen
+            Utils.goHome(this);
+
+        } catch (IOException e) {
+
+            // Write the stack trace to System.err and copy the reason of the failure to clipboard
+            e.printStackTrace();
+            Utils.copyText(this, e.toString());
+        }
+    }
+}