Android - Dialog -

・AlertDialog を表示

final AlertDialog.Builder builder = new AlertDialog.Builder(this);

/* set title of alertdialog */
builder.setTitle("Show AlertDialog!");

/* set Message */
builder.setMessage("This is a message");

/* set button and onClickListener */
builder.setPositiveButton("Button Title", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dia, int i) {
     setResult(RESULT_OK);
    }
});

/* create alertDialog */
builder.create();

/* show created alertDialog */
builder.show();