Android Simple Yes/No MessageBox

In Windows, you can ask a simple Yes/No question with one line:

if (IDYES == MessageBox(hWnd, "Are you sure?", "Erase hard drive", MB_YESNO|MB_ICONEXCLAMATION)) {
	EraseHardDrive();
}

I've seen a lot of posts asking how to do something similar in Android. I've also seen a lot of answers, but none I thought were clear and concise... I have combined the information I gleaned from various postings in an attempt to provide "one stop shopping" with a simple example.

This is a simple app that puts up a Yes/No message box and processes the input.
When the Yes button is pressed, it flashes a toast message.
When the No button is pressed, it does nothing.

public class YesNoSampleActivity extends Activity {
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        //Put up the Yes/No message box
    	AlertDialog.Builder builder = new AlertDialog.Builder(this);
    	builder
    	.setTitle("Erase hard drive")
    	.setMessage("Are you sure?")
    	.setIcon(android.R.drawable.ic_dialog_alert)
    	.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
    	    public void onClick(DialogInterface dialog, int which) {			      	
    	    	//Yes button clicked, do something
    	    	Toast.makeText(YesNoSampleActivity.this, "Yes button pressed", 
                               Toast.LENGTH_SHORT).show();
    	    }
    	})
    	.setNegativeButton("No", null)						//Do nothing on no
    	.show();
        
    	    	
    	// Continue code after the Yes/No dialog
    	// ....
    }
}

Note: within the embedded anonymous DialogInterface.OnClickListener's onClick method, if you wish to access the YesNoSampleActivity object's this, you use the special syntax: YesNoSampleActivity.this

Download the complete Eclipse project source.

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Android Simple Yes/No MessageBox