How to add a row dynamically in a tableLayout in Android

Question

I have a function who gets a list of products from a webpage, and I want to add a row in a tableLayout for each element of the list.

public void getProductsOfCategory() throws IOException{
        new Thread(){
            public void run(){
                //background code...
                try {
                    Bundle extras = getIntent().getExtras();
                    String categoryName = extras.getString("categoryName");

                    HttpGet httpget = new HttpGet("http://romal.hopto.org/foodadvisor/users/getProductsOfCategory.json?category="+categoryName);
                    HttpResponse httpresp = httpClient.execute(httpget);
                    ByteArrayOutputStream baos = new ByteArrayOutputStream();
                    httpresp.getEntity().writeTo(baos);
                    final String content = new String(baos.toByteArray());
                    CategoryActivity.this.runOnUiThread(new Runnable(){
                        public void run(){
                            //foreground code (UI)
                            //update user interface, for example, showing messages
                            try {
                                JSONObject jObject = new JSONObject(content);
                                JSONArray productsList = jObject.getJSONArray("response");
                                for(int i=0; i<productsList.length();i++){
                                    JSONObject product = productsList.getJSONObject(i);
                                    JSONObject productData = product.getJSONObject("Product");
                                    String productDescription = productData.getString("description");
                                }
                            } catch (JSONException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            }   
                        }
                    });
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }.start();
    }

In my layout xml file I have defined the table layout like this:

<TableLayout
            android:id="@+id/tableOfProducts"
            android:layout_width="match_parent"
            android:layout_height="match_parent" >

            <TextView
                android:id="@+id/productDescription"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="TextView"
                android:paddingBottom="7dp"
                android:paddingLeft="14dp"
                android:paddingRight="14dp"
                android:paddingTop="7dp"
                android:textSize="20dp" />

        </TableLayout>

I imagine I have to add some extra code in the for loop, adding a new row and a new textview for each element, and setting the content of the text view with the string that has the description of the product. How can I do this?

Answer 1

Check this out, this is the general way of creating table rows dynamically. Modify it accordingly

XML file

<TableLayout 
xmlns:android="http://schemas.android.com/apk/res/android"

android:id="@+id/main_table"
android:layout_height="wrap_content" 
android:layout_width="match_parent">
</TableLayout> 

JAVA PART

TableLayout t1;

TableLayout tl = (TableLayout) findViewById(R.id.main_table);

Create table row header to hold the column headings

TableRow tr_head = new TableRow(this);
tr_head.setId(10);
tr_head.setBackgroundColor(Color.GRAY);        // part1
tr_head.setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));

I'm adding two data sections to the table row

TextView label_hello = new TextView(this);
         label_hello.setId(20);
         label_hello.setText("HELLO");
         label_hello.setTextColor(Color.WHITE);          // part2
         label_hello.setPadding(5, 5, 5, 5);
         tr_head.addView(label_hello);// add the column to the table row here

         TextView label_android = new TextView(this);    // part3
         label_android.setId(21);// define id that must be unique
         label_android.setText("ANDROID..!!"); // set the text for the header  
         label_android.setTextColor(Color.WHITE); // set the color
         label_android.setPadding(5, 5, 5, 5); // set the padding (if required)
         tr_head.addView(label_android); // add the column to the table row here

After adding the columns to the table row its time to add the table row the the main table layout that we fetched at the start

tl.addView(tr_head, new TableLayout.LayoutParams(
                 LayoutParams.FILL_PARENT,                    //part4
                 LayoutParams.MATCH_CONTENT));      

EDIT : YOU CAN DO THE FOLLOWING IN YOUR CODE

 TextView[] textArray = new TextView[productsList.length()];
 TableRow[] tr_head = new TableRow[productsList.length()];

 for(int i=0; i<productsList.length();i++){
 JSONObject product = productsList.getJSONObject(i);
 JSONObject productData = product.getJSONObject("Product");
 String productDescription = productData.getString("description");

//Create the tablerows
tr_head[i] = new TableRow(this);
tr_head[i].setId(i+1);
tr_head[i].setBackgroundColor(Color.GRAY);
tr_head[i].setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));

 // Here create the TextView dynamically

 textArray[i] = new TextView(this);
         textArray[i].setId(i+111);
         textArray[i].setText(productDescription);
         textArray[i].setTextColor(Color.WHITE);
         textArray[i].setPadding(5, 5, 5, 5);
         tr_head[i].addView(textArray[i]);

// Add each table row to table layout

tl.addView(tr_head[i], new TableLayout.LayoutParams(
                     LayoutParams.MATCH_PARENT,
                     LayoutParams.WRAP_CONTENT));

} // end of for loop

Creating the TextView and TableRow array are not necessary. You can just include part1, part2, part3 (if you need more than 1 field) and part4 inside your for loop.