Create your own shared-library

Below is the step of creating own shared-library:

1. Create JAVA file, ex: c:\com.myactivity.java
2. Compress to JAR, with command: jar cf c:\com.myactivity.jar c:\com.myactivity.java
   • JAR is our library file.
3. Create XML file (permission file), ex: c:\com.myactivity.xml, as below:
   

   <permissions>
       <library name="com.myactivity" file="/system/framework/com.myactivity.jar" />
   </permissions> 
   

4. Root the OS image: adb root (We assume that the image can be rooted.)
5. Mount /system, commands are as belows:
   

   adb shell
   mount –o remount /system
   exit 
   

6. Push JAR and XML file to OS image:
   

   adb push c:\com.myactivity.jar /system/framework/
   adb push c:\com.myactivity.xml /system/etc/permissions/ 
   

7. Reboot device.
8. After rebooted, the shared-library can be used correctly.
9. Try using to test the library.
   

   <uses-library android:name="com.myactivity" android:required="true" />