java - How to create and use android libraries jar? -


I have created Simple Android Libraries Project.

I have a new Android Application Project & gt; & Gt; Uncheck "Make this project as a library" and "Create custom launcher icon" and uncheck "Create activity".

Next, I create a simple class named MyClass.java and Here's my code: 

  package android.external.jar; Public Class Micalos {Public String Hello World () {Return "Hello World"; }}   
 And then, I export & gt; & Gt; Java & gt; & Gt; Jar file & gt; & Gt; Uncheck all except the Src folder (this is included with Android manifest.exml) & gt; & Gt;  
 I have another Android advertising project to use that JR file.  
 I have added this project to the external jar by right clicking on my project and GT . ; & Gt; Properties & gt; & Gt; Java Build Path & gt; & Gt; Libraries & gt; & Gt;  
  Project structure with my external jar files   
 I have tried to use my library like this:  
  import android.external.jar. *; ... @ Override public wide onclick onclick (see V) {// TODO auto-generated method stub switch (v.getId ()) {case R.D. button 1: try {MyClass myClass = new MyClass (); Toast. MakeActivity (), myClass.helloWorld (), toast .LENGTH_SHORT). Show (); } Hold (exception e) {// TODO: exception toast. GetActivity (), E. Megas (), Toast .LENGTH_LONG). Show (); } break; Default: Break; }} ...   
 but it does not work ..: ( 
 And I get an error like this:  
 error  
 Does anyone know how to fix my problem?  
 Thank you very much ..   
 
 
 Firstly you have your library To  libs  folders and then  
 include your library and  properties -> Java build path -> order and export   to check your jar file in 
 to clean up once the project and a bar check.

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