Apps Adding buttons dynamically

[wige]

Hi everyone. I am creating an Android app that will act as a front end for viewing reports. I have created an Activity that requests a list of available reports from the server. What I am trying to do is get that activity to add a button for each feed listed in the list of reports (contained in a Vector). This is the code I have so far:

// Check for an error
            if (feedHandler.success()) {
                // Get the data from the handler
                infoView.setText("Document Loaded. Please select a report.");
                infoView.append("\n");
                Vector<String[]> reportList = feedHandler.getReports();
                
                // Cycle through the list of reports, and output the results
                for (Enumeration<String[]> e = reportList.elements(); e.hasMoreElements();) {
                    String[] reportInfo = (String[]) e.nextElement();
                    this.layout.addView(new Button(this));
                }
                
            } else {
                infoView.setText(feedHandler.getError());
            }

this.layout.addview is where I am trying to add the new buttons. The information for the buttons is stored in reportList, a string array containing the label for the button, and the id code for the report that needs to be handled by the click handler.

I have been able to find ways to add finite buttons through XML and hard coding, but not arbitrary buttons. Any advice or suggestions would be greatly appreciated.

 

[Jasp182]

Sounds like you need to add text and a click handler (if I'm understanding you correctly). So, instead of "newing" up the Button inline in the call to layout.addView, instantiate the button and call setText([buton label]) and setOnClickListener(new OnClickListener() {});

Something like this inside your loop:

        Button btn = new Button(this);
        btn.setText("label");
        btn.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                
            }
        });
        layout.addView(btn);

 

[wige]

Thanks Jasp, I tried this this morning. Unfortunately, the new OnClickListener can only take static variables, so for example, I can't pass a string to be used by the onClick method. I did finally come up with a solution, but I think it is a bit hackish.

The first thing I do is have my activity extend OnClickListener and change btn.setOnClickListener to (this) instead of creating a new listener. I then add each Button I create to a Vector after adding it to the layout. I also made both the Button Vector and the String[] Vector global.

Now, when a button is clicked, the onClick method searches the Button vector for the correct button and grabs the element ID. I then retrieve the data from the String[] vector to create the Intent and load the next Activity. So far, it seems to work, but it just feels to me like I am cheating a bit.