how to add a button next to a message in java builder

问题

Kinda new to Java programming, And I am trying to create a native app for android. my problem is, that when I select some stuff from my SQLite DB - I want to add a button with an eventlistener next to the output.

    if(view==btnViewAll)
     {
        Cursor c=db.rawQuery("SELECT * FROM catalogue", null);
        if(c.getCount()==0)
        {
            showMessage("Error", "No records found");
            return;
        }
        StringBuffer buffer=new StringBuffer();
        while(c.moveToNext())
        {
            buffer.append("Product name: "+c.getString(1)+"\n");
            buffer.append("Description: "+c.getString(2)+"\n");
            buffer.append("Price: "+c.getString(3)+"\n");
            buffer.append("Image: "+c.getString(4)+"\n\n");

        }
        showMessage("All Products", buffer.toString());
     }//end of btnViewAll

and then my ShowMessage is this -

public void showMessage(String title, String message) {
    Builder builder = new Builder(this);
    builder.setCancelable(true);
    builder.setTitle(title);
    builder.setMessage(message);
    builder.show();
}//end of Message!

This all pops up on my phone, with a list of the records in my DB - but I can't figure out, how to add a button for each row in there.

help is appreciated!

回答1:

Refering to your recent comment, what you need instead of displaying the full String is to create a custom list and populate it via your DB. Here are the steps required :

1) Create an Object User, with name/phone number

2) When parsing your DB, return a list

3) Create a CustomAdapter extending ArrayAdapter

4) Change your xml so that there's only a listView

5) In your activity, call an AsyncTask to fetch your DB (as you probably already do), then use the List to populate the ListView through the Adapter.

Further tips : create a layout row.xml that'll be inflated in your Adapter, where you'll have the Widgets needed to display informations about your user (ie name/phone n°) + a button. And in the getView of the adapter, inflate your row.xml, update the values with the data, and set the behaviour for the button there.

Here's a great tutorial where you'll find everything in details : http://www.vogella.com/tutorials/AndroidListView/article.html

Good luck with it !

来源：https://stackoverflow.com/questions/26891575/how-to-add-a-button-next-to-a-message-in-java-builder

标签

java

android

sqlite

buffer

builder