lib support

Author: efraespada

README.md

@@ -16,7 +16,7 @@ Gradle implementation
 buildscript { 
  
     ext {
-        stringcare_version = '0.7'
+        stringcare_version = '0.8'
     }
     
     repositories {
@@ -46,11 +46,17 @@ dependencies {
 
 Setup
 -----
-Initialize the library:
+StringCare library needs the global application's `Context` for access to `PackageManager` and get signatures.
+In your `app` (or main) module the package name is obtained from `Context`:
 ```java
 SC.init(getApplicationContext());
 ```
 
+In the rest of modules (or libraries) you must pass an `Object` in order to obtain its package name:
+```java
+SC.initForLib(getApplicationContext(), this);
+```
+
 
 #### Encrypt
 The plugin will encrypt all string tags with `hidden="true"` as attribute.
@@ -106,6 +112,44 @@ message += "\n\nFor Metal Gear lovers:\n\n\"Snake, the password is " +
 
 <p align="center"><img width="40%" vspace="20" src="https://raw.githubusercontent.com/efraespada/AndroidStringObfuscator/master/sample.png"></p>
 
+Library Sample
+--------------
+If
+```java
+public class YourApplication extends Application {
+ 
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        Library.init(this);
+        String secretPass = Library.getPassword(); // should return -> =^UCrE4zR#}kpCu~
+    }
+ 
+}
+```
+In library package:
+```java
+public class Library {
+    
+    private Library() {
+        // ..
+    }
+    
+    public static void init(Context context) {
+        SC.initForLib(context, new Library());
+    }
+    
+    public static String getPassword() {
+        return SC.getString(your.lib.module.R.string.pass);
+    }
+ 
+}
+```
+```xml
+<resources>
+    <string name="pass" hidden="true">=^UCrE4zR#}kpCu~</string>
+</resources>
+```
 
 Configuration
 -----------------------------

library/build.gradle

@@ -2,7 +2,7 @@ apply plugin: 'com.android.library'
 apply plugin: 'com.github.dcendents.android-maven'
 apply plugin: 'com.jfrog.bintray'
 
-version = "0.7"
+version = "0.8"
 
 android {
     compileSdkVersion 25
@@ -11,7 +11,7 @@ android {
     defaultConfig {
         minSdkVersion 9
         targetSdkVersion 25
-        versionCode 2
+        versionCode 3
         versionName version
 
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

library/src/main/java/com/stringcare/library/SC.java

@@ -32,6 +32,7 @@
 public class SC {
 
     private static final int LENGTH = 16;
+    private static String libPackage;
     private static final String CODIFICATION = "UTF-8";
     private static final String TRANSFORMATION = "AES/ECB/PKCS5Padding";
     private static final char[] hexArray = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
@@ -42,9 +43,18 @@ public static void init(Context c) {
         context = c;
     }
 
+    public static void initForLib(Context c, Object object) {
+        context = c;
+        libPackage = object.getClass().getPackage().getName();
+    }
+
     private static String getCertificateSHA1Fingerprint() {
-        PackageManager pm = context.getPackageManager();
         String packageName = context.getPackageName();
+        return getCertificateSHA1Fingerprint(libPackage != null ? libPackage : packageName);
+    }
+
+    private static String getCertificateSHA1Fingerprint(String packageName) {
+        PackageManager pm = context.getPackageManager();
         int flags = PackageManager.GET_SIGNATURES;
         PackageInfo packageInfo = null;
         try {

sample/build.gradle

@@ -36,8 +36,8 @@ dependencies {
     })
     implementation 'com.android.support:appcompat-v7:26.1.0'
     testImplementation 'junit:junit:4.12'
-    // implementation project(path: ':library')
-    implementation "com.stringcare:library:$stringcare_version"
+    implementation project(path: ':library')
+    // implementation "com.stringcare:library:$stringcare_version"
 }
 
 

sample/src/main/java/com/efraespada/stringobfuscator/MainActivity.java

@@ -14,6 +14,7 @@ protected void onCreate(Bundle savedInstanceState) {
         setContentView(R.layout.activity_main);
 
         SC.init(getApplicationContext());
+        // SC.initForLib(getApplicationContext(), this);
 
         int stringId = R.string.hello;