example bridge callbacks

gistfile1.txt

/*
Foo.java
*/

package com.apportable.example;

...

public class Foo {
    public static void initialize(Activity activity, String appId) {
        /* do something here in java */
    }

    public native void myCallback(String value);

    public Foo(Activity activity) {

    }

    public void invokeCallback(String value) {
        myCallback(value);
    }
}

/*
Foo.h
*/

#import <BridgeKit/JavaObject.h>

@class AndroidActivity;

@interface Foo : JavaObject
+ (void)initialize:(AndroidActivity *)activity appIdentifier:(NSString *)appId;
- (id)initWithActivity:(AndroidActivity *)activity;
- (id)init;
- (void)invokeCallback:(NSString *)value;
- (void)invokeCallback:(NSString *)value handler:(void (^)(NSString *))handler;
@end

/*
Foo.m
*/

#import "Foo.h"

@implementation Foo {
    void (^_handler)(NSString *);
}

+ (void)initializeJava
{
    [super initializeJava];

    [Foo registerStaticMethod:@"initialize" selector:@selector(initialize:appIdentifier:) arguments:[AndroidActivity className], [NSString className], nil];

    [Foo registerConstructorWithSelector:@selector(initWithActivity:) arguments:[AndroidActivity className], nil];

    [Foo registerInstanceMethod:@"invokeCallback" selector:@selector(invokeCallback:) arguments:[NSString className], nil];

    [Foo registerCallback:@"myCallback" selector:@selector(myCallback:) arguments:[NSString className], nil];
}

- (id)init
{
    return [self initWithActivity:[AndroidActivity currentActivity]];
}

- (void)dealloc
{
    [_handler release];
    [super dealloc];
}

- (void)invokeCallback:(NSString *)value handler:(void (^)(NSString *))handler
{
    if (_handler != handler)
    {
        [_handler release];
        _handler = Block_copy(handler);
    }
    [self invokeCallback:value];
}

- (void)myCallback:(NSString *)value
{
    if (_handler != NULL) {
        _handler(value);
    }
}

@end