Android 2.2 How to know when somebody is typing?

I am developing an IM application on android 2.2 and when somebody writes to me I want to see that he is typing to me, exactly like on yahoo messenger. How could 开发者_如何学GoI do this on Android 2.2? If you can give me an example I would be grateful. Thank you and I'm waiting your answers.

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I guess that your question is deeper than varun's answer. But, it's a good start. The important thing is: how can you be notified in real time when a remote user is typing, right?

In that case, you will have to implement a push system. That way, if user A is typing something, user B will be notified (instead of polling a server in order to know whether or not the other is typing). You don't provide information about what technology you are using; if you are using TCP or HTTP, I highly recommend you take a look at MQTT. It will allow you to easy implement pushing on Android, and that's the way that some IM apps work.

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You can try adding a textwatcher to know if any typing activity is happening. something like this.

myEditText.addTextChangedListener(new TextWatcher() {
  public void afterTextChanged(Editable s) {
       //do something
  }

  public void beforeTextChanged(CharSequence s, int start, int count, int after){
       //do something
  }

  public void onTextChanged(CharSequence s, int start, int before, int count) { 
       //do something
  }
});