[android]无聊写个android的GCDのdispatch_async

public interface Block
{

/**
*
* 需要执行的任务
*
* @return Object 执行的结果
*/
void IBuild();

}

/**
* GCD of Android
*
* @author fred don
*
*/
public class GCD
{

public static String dispatch_get_main_queue()
{
return "main";
}
/**
* 1 x后台 运行
*
* @author fred don
* @param threadName
*            [main UI线程运行 ,others /后台 运行]
* @param block
*/
public static void dispatch_async(String threadName, final Block block)
{
if ("main".equals(threadName))
{
handler.post(new Runnable()
{
@Override
public void run()
{
if (block != null)
{
block.IBuild();
}
}
});
}
else
{
Thread t = new Thread(new Runnable()
{
@Override
public void run()
{
if (block != null)
{
block.IBuild();
}
}
});
t.setName(threadName);
t.start();
}
}

static Handler handler=new Handler();
}

//后台线程
GCD.dispatch_async("back", new Block()
{

@Override
public void IBuild()
{
println(Thread.currentThread().getName());
GCD.dispatch_async("main", new Block()
{

@Override
public void IBuild()
{
println(Thread.currentThread().getName());

}

});
}

});
//UI线程
GCD.dispatch_async("main", new Block()
{

@Override
public void IBuild()
{
println(Thread.currentThread().getName());

}

});

public static void println(String s){
Log.i("GCDTester", s);
}