create a new module Library

.idea/gradle.xml

@@ -8,6 +8,7 @@
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/library" />
             <option value="$PROJECT_DIR$/samples" />
           </set>
         </option>

.idea/modules.xml

@@ -3,6 +3,7 @@
   <component name="ProjectModuleManager">
     <modules>
       <module fileurl="file://$PROJECT_DIR$/Simple-Commons.iml" filepath="$PROJECT_DIR$/Simple-Commons.iml" />
+      <module fileurl="file://$PROJECT_DIR$/library/library.iml" filepath="$PROJECT_DIR$/library/library.iml" />
       <module fileurl="file://$PROJECT_DIR$/samples/samples.iml" filepath="$PROJECT_DIR$/samples/samples.iml" />
     </modules>
   </component>

library/.gitignore

@@ -0,0 +1 @@
+/build

library/build.gradle

@@ -0,0 +1,24 @@
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion 25
+    buildToolsVersion "25.0.1"
+
+    defaultConfig {
+        minSdkVersion 16
+        targetSdkVersion 25
+        versionCode 1
+        versionName "1.0"
+
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile 'com.android.support:appcompat-v7:25.0.1'
+}

library/proguard-rules.pro

@@ -0,0 +1,17 @@
+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in $ANDROID_HOME/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}

library/src/main/AndroidManifest.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest package="com.simplemobiletools.commons"/>

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

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Library</string>
+</resources>

samples/src/main/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          package="com.simplemobiletools.commons">
+          package="com.simplemobiletools.commons.samples">
 
     <application
         android:allowBackup="true"
@@ -8,7 +8,7 @@
         android:label="@string/app_name"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
-        <activity android:name=".MainActivity">
+        <activity android:name=".activities.MainActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
 

samples/src/main/java/com/simplemobiletools/commons/samples/activities/MainActivity.java

@@ -1,7 +1,9 @@
-package com.simplemobiletools.commons;
+package com.simplemobiletools.commons.samples.activities;
 
-import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+
+import com.simplemobiletools.commons.samples.R;
 
 public class MainActivity extends AppCompatActivity {
 

settings.gradle

@@ -1 +1 @@
-include ':samples'
+include ':samples', ':library'