I'm making an application starting others installed applications on an Android smartphone.

Basically, here is the code i use to start another application made by myself, with a parameter.

Application 1 :

```
PackageManager pm = getApplicationContext().getPackageManager();
Intent appStartIntent = pm.getLaunchIntentForPackage(mypackage);
    appStartIntent.putExtra("message", s);

    if (null != appStartIntent) {
        getApplicationContext().startActivity(appStartIntent);
    }

```

In my other application, here how i get the parameter :

Appliaction 2 :

```
 public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Bundle extras = getIntent().getExtras(); 
    String result;
    try {
        result= (String) extras.getString("message");
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        recup = "nothing received";
    }

    Toast.makeText(getApplicationContext(), recup, Toast.LENGTH_SHORT).show();
}

```

The problem here, is that we need to know the second application can receive a parameter called "message".

Here is the question :
Is it possible to know all possible parameters expected by the application 2, from the application 1 ?
If yes, is it possible to know for example, the parameters accepted by any installed application on my phone? (example : Handcent, Facebook, latitude...)