Hander Message 传递对象

Hander Message 传递对象

我们在Message的源码中发现

public final class Message implements Parcelable {
    /**
     * User-defined message code so that the recipient can identify
     * what this message is about. Each {@link Handler} has its own name-space
     * for message codes, so you do not need to worry about yours conflicting
     * with other handlers.
     */
    public int what;

    /**
     * arg1 and arg2 are lower-cost alternatives to using
     * {@link #setData(Bundle) setData()} if you only need to store a
     * few integer values.
     */
    public int arg1;

    /**
     * arg1 and arg2 are lower-cost alternatives to using
     * {@link #setData(Bundle) setData()} if you only need to store a
     * few integer values.
     */
    public int arg2;

    /**
     * An arbitrary object to send to the recipient.  When using
     * {@link Messenger} to send the message across processes this can only
     * be non-null if it contains a Parcelable of a framework class (not one
     * implemented by the application).   For other data transfer use
     * {@link #setData}.
     *
     * Note that Parcelable objects here are not supported prior to
     * the {@link android.os.Build.VERSION_CODES#FROYO} release.
     */
    public Object obj;

 

    以上值得注意的地方是：
    //可以注意这里的解释，这是一个任意的对象，用来传递给接收者
    //对于其他的数据，如基本类型可以使用setData
    //注意点是：这里不支持Parcelable类型的对象

于是可以像下面这样来使用

if(handler!=null){
            Message message = handler.obtainMessage();
            message.what = 123123;
            message.obj=new Object();
            handler.sendMessageDelayed(message, 1000);
        }