Android的处理器消息 [英] Android, Handler messaging

问题描述

我有一些非常简单的code做处理程序：

I have some very simple code to do with handlers:

 Handler seconds=new Handler() { 
    @Override 
    public void handleMessage(Message msg) { 
      bar.incrementProgressBy(5); 
      tView1.setText("r:"+msg);
    } 
  }; 

和我的主题：

Thread seconds_thread=new Thread(new Runnable() { 
              public void run() { 
                try { 
                  for (int i=0;i<20 && isRunning.get();i++) { 
                    Thread.sleep(1000); 

                    Message m = new Message();
                    Bundle b = new Bundle();
                    b.putInt("what", 5); // for example
                    m.setData(b);
                    seconds.sendMessage(m);



                  } 
                } 
                catch (Throwable t) { 
                  // just end the background thread 
                } 
              } 
            }); 

正如你可以在上面看到我试图改变价值什么的消息，所以我可以做基于消息不同的事情，但根据 tView1.setText（R+味精）的什么不更改到5的值:(
它是只显示什么= 0

As you can see above i am trying to change the value of "what" in the message, so i can do different things based on the message, but according to "tView1.setText("r:"+msg)" the value of "what" is not changing to 5 :(
it is only showing "what=0"

如何更改消息的值，这样我可以做基于消息不同的东西？

How do I change the values of Message so that I can do different things based on the message?

谢谢！

推荐答案

您必须从消息中的数据（如捆绑，然后为INT）已发送你的处理程序：

You must get the data from the Message (as Bundle then as int) you have sent in the handler you do:

Handler seconds=new Handler() { 
    @Override 
    public void handleMessage(Message msg) { 
      int sentInt = msg.getData().getInt("what");
      bar.incrementProgressBy(5); 
       tView1.setText("r:"+Integer.toString(sentInt));
    } 
  }; 

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