ProxyBuilder should not proxy methods with package visibility

[GoogleCodeExporter]

In the following example, both "TestPrinter" and "Tester" are in same package 
("com.example.test"). However MainActivity where the proxy generation happens 
is under a different package ("com.example"). 

Executing the MainActivity throws an exception "java.lang.IllegalAccessError"

//TestPrinter.java
package com.example.test;
public class TestPrinter {
    private static final String TAG = "TestPrinter";

   //package visible method.
    void method4(String arg1){
        Log.i(TAG, String.format("Executing method4(%s)", arg1));
    }
}

//Tester.java
package com.example.test;
public class Tester {
    public void test(TestPrinter printer){
        Random r = new Random();
        printer.method4(UUID.randomUUID().toString());
    }
}

//MainActivity.java
package com.example;
public class MainActivity extends Activity {
    public static final String TAG = "MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById(R.id.create_proxy).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                try {
                    InvocationHandler handler = new InvocationHandler() {
                        public Object invoke(Object proxy, Method method, Object[] objects) throws Throwable {
                            Log.i(TAG,
                                    String.format("%s.%s is being invoked with argument = %s",
                                            proxy.getClass().getSimpleName(), method.getName(), objects));
                            Object result = ProxyBuilder.callSuper(proxy, method, objects);
                            return result;
                        }
                    };

                    TestPrinter printer =
                        ProxyBuilder.forClass(TestPrinter.class)
                            .dexCache(getApplicationContext().getDir("dex", Context.MODE_PRIVATE))
                            .handler(handler)
                            .build();

                    new Tester().test(printer);
                } catch (Throwable e) {
                    Log.e(TAG, "Error creating runtime proxy", e);
                }
            }
        });
    }
}

Original issue reported on code.google.com by ajaykuma...@gmail.com on 1 May 2014 at 9:26