change the package name

app/build.gradle

@@ -1,18 +1,18 @@
 apply plugin: 'com.android.application'
 
 android {
-    signingConfigs {
+    /*signingConfigs {
         config {
             keyAlias RELEASE_KEY_ALIAS
             keyPassword RELEASE_KEY_PASSWORD
             storeFile file('../release.keystore')
             storePassword RELEASE_STORE_PASSWORD
         }
-    }
+    }*/
     compileSdkVersion 23
     buildToolsVersion "23.0.2"
     defaultConfig {
-        applicationId "flashlight.simplemobiletools.com"
+        applicationId "com.simplemobiletools.flashlight"
         minSdkVersion 16
         targetSdkVersion 23
         versionCode 1
@@ -22,7 +22,7 @@ android {
         release {
             minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
-            signingConfig signingConfigs.config
+            //signingConfig signingConfigs.config
         }
     }
 }

app/src/androidTest/java/com/simplemobiletools/flashlight/ApplicationTest.java

@@ -1,4 +1,4 @@
-package flashlight.simplemobiletools.com;
+package com.simplemobiletools.flashlight;
 
 import android.app.Application;
 import android.test.ApplicationTestCase;

app/src/main/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest
-    package="flashlight.simplemobiletools.com"
+    package="com.simplemobiletools.flashlight"
     xmlns:android="http://schemas.android.com/apk/res/android">
 
     <uses-permission android:name="android.permission.CAMERA"/>
@@ -20,7 +20,7 @@
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
         <activity
-            android:name=".MainActivity"
+            android:name="com.simplemobiletools.flashlight.MainActivity"
             android:screenOrientation="portrait">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
@@ -30,7 +30,7 @@
         </activity>
 
         <receiver
-            android:name=".MyWidgetProvider"
+            android:name="com.simplemobiletools.flashlight.MyWidgetProvider"
             android:icon="@mipmap/ic_launcher"
             android:label="Simple Flashlight">
             <intent-filter>

app/src/main/java/com/simplemobiletools/flashlight/MainActivity.java

@@ -1,4 +1,4 @@
-package flashlight.simplemobiletools.com;
+package com.simplemobiletools.flashlight;
 
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;

app/src/main/java/com/simplemobiletools/flashlight/MyCamera.java

@@ -1,4 +1,4 @@
-package flashlight.simplemobiletools.com;
+package com.simplemobiletools.flashlight;
 
 public interface MyCamera {
     void enableFlashlight();

app/src/main/java/com/simplemobiletools/flashlight/MyCameraImpl.java

@@ -1,4 +1,4 @@
-package flashlight.simplemobiletools.com;
+package com.simplemobiletools.flashlight;
 
 import android.hardware.Camera;
 

app/src/main/java/com/simplemobiletools/flashlight/MyWidgetProvider.java

@@ -1,4 +1,4 @@
-package flashlight.simplemobiletools.com;
+package com.simplemobiletools.flashlight;
 
 import android.app.PendingIntent;
 import android.appwidget.AppWidgetManager;

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

@@ -1,14 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
-    android:paddingTop="@dimen/activity_vertical_margin"
+    android:paddingTop="@dimen/activity_vertical_margin">
-    tools:context="flashlight.simplemobiletools.com.MainActivity">
 
     <ImageView
         android:id="@+id/toggle_btn"

app/src/test/java/flashlight/simplemobiletools/com/ExampleUnitTest.java

@@ -1,4 +1,4 @@
-package flashlight.simplemobiletools.com;
+package com.simplemobiletools.flashlight;
 
 import org.junit.Test;