public interface Constants {
     /** Overall DebugTag for whole AndNav. */
     public final String DEBUGTAG = "ANDNAV_DEBUGTAG";
     
     /** Shall be used if only one SubActivity is closed.*/
     public final int SUBACTIVITY_RESULTCODE_UP_ONE_LEVEL = 0;
     /** Shall be used if a chain of SubActivities is to be closed.*/
     public final int SUBACTIVITY_RESULTCODE_CHAINCLOSE = SUBACTIVITY_RESULTCODE_UP_ONE_LEVEL + 1;
     /** Shall be used to go back one level in the dialog-process. */
     public final int SUBACTIVITY_RESULTCODE_SUCCESS = SUBACTIVITY_RESULTCODE_CHAINCLOSE + 1;
}

                   Intent i = new Intent(MainActivity.this,
                                             SubActivityWithResult.class);
                   
                    /* Create a bundle that will  
                     * hold will be passed to the
                     * SubActivityover the Intent */
                    Bundle b = new Bundle();
                    b.putString("DEFAULTTEXT", "Some Default blabla...");
                    i.putExtras(b);
                    // We use SUB_ACTIVITY_REQUEST_CODE as an 'identifier'
                    startSubActivity(i, SUB_ACTIVITY_REQUEST_CODE);

  // ...
    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        // Apply our subactivity.xml-Layout
        setContentView(R.layout.subactivity);
       
        /* Retrieve the String from the Extra-Bundle
         * we started this SubActivity with. */
        Bundle b = this.getIntent().getExtras();
        String s = b.getString("DEFAULTTEXT");
        // Find the EditText defined in the subactivity.xml
        ((EditText)findViewById(R.id.subactivity_edit_returnvalue)).setText(s);

        // ...

Intent intent = new Intent(InvokingActivity.this, InvokedActivity.class);
intent.putExtra("anObject",object) ;
startSubActivity(intent, 0);

Bundle bundle = this.getIntent().getExtras();
if ( bundle != null ) {
          Object object = bundle.get("anObject"); <-- Error
}

Intent intent = new Intent();
intent.setClass(this, SubActivity.class);
startActivityForResult(intent, 1234);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
     super.onActivityResult(requestCode, resultCode, data);

     Log.d(TAG, "" + requestCode);
     Log.d(TAG, "" + resultCode);
     Log.d(TAG, "" + data.getStringExtra( "result" ) );
}   

Button someExitButton = (Button)findViewById(R.id.someExitButton);
someExitButton.setOnClickListener(new OnClickListener(){
    public void onClick(View view) {
     Intent data = new Intent();
     data.putExtra( "result", theResultString );
     setResult( RESULT_OK, data );
     finish();
    }
});                      

intent.setClass(this, SubActivityWithResult.class);

intent.setClass(this, SubActivityWithResult.class);

  @Override
   public boolean onKeyDown(int keyCode, KeyEvent event) {
           if(keyCode == KeyEvent.KEYCODE_BACK){
             data.putExtra("blah", "");
             filebrowser.this.setResult(SUCCESS_RETURN_CODE,data);
             filebrowser.this.finish();
                   super.onKeyDown(keyCode, event);
           }
           return true;
   }

EditText txtWorkoutName = (EditText)findViewById(R.id.newTxtName);

public class neweditworkout extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //Inflate View
        setContentView(R.layout.neweditworkout);
        final Button btnSelect = (Button)findViewById(R.id.newButtonSelect);
        btnSelect.setOnClickListener(new View.OnClickListener() {     
               //@Override
               public void onClick(View v) {
               //EditText txtWorkoutName = (EditText)findViewById(R.id.newTxtName);

                 Intent data = new Intent();
                 data.putExtra("result", "TEST_DATA");
                    neweditworkout.this.setResult(RESULT_OK, data);
                    neweditworkout.this.finish();
               }
     });
    }
}

public class neweditworkout extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //Inflate View
        setContentView(R.layout.neweditworkout);
        final Button btnSelect = (Button)findViewById(R.id.newButtonSelect);
        btnSelect.setOnClickListener(new View.OnClickListener() {     
               //@Override
               public void onClick(View v) {
               EditText txtWorkoutName = (EditText)findViewById(R.id.newTxtName);

                 Intent data = new Intent();
                 data.putExtra("result", "TEST_DATA");
                    neweditworkout.this.setResult(RESULT_OK, data);
                    neweditworkout.this.finish();
               }
          });
    }
}

    // Listen for results from sub-activities.
    //@Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
          super.onActivityResult(requestCode, resultCode, data);
          Toast.makeText(this, "Returned: "+data.getStringExtra("result"), Toast.LENGTH_LONG).show();
     }