Adding Table rows Dynamically in Android

Question

I am trying to create a layout where I need to add table rows dynamically. Below is the table layout xml

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:id="@+id/displayLinear"     android:background="@color/background_df"     android:orientation="vertical" >           <TableRow             android:layout_width="wrap_content"             android:layout_height="wrap_content"             android:id="@+id/display_row"             android:layout_marginTop="280dip" >  </TableLayout> 

The activity file where rows are being added dynamically is

public void init(){     menuDB = new MenuDBAdapter(this);     ll = (TableLayout) findViewById(R.id.displayLinear);      TableRow row=(TableRow)findViewById(R.id.display_row);     for (int i = 0; i <2; i++) {          checkBox = new CheckBox(this);         tv = new TextView(this);         addBtn = new ImageButton(this);         addBtn.setImageResource(R.drawable.add);         minusBtn = new ImageButton(this);         minusBtn.setImageResource(R.drawable.minus);         qty = new TextView(this);         checkBox.setText("hello");         qty.setText("10");         row.addView(checkBox);         row.addView(minusBtn);         row.addView(qty);         row.addView(addBtn);         ll.addView(row,i);      } } 

But when I run this, I am getting below error

08-13 16:27:46.437: E/AndroidRuntime(23568): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.roms/com.example.roms.DisplayActivity}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. 

I understand that this is due to command ll.addView(row,i); but when I remove this its adding all stuff in a single row rather tan creating a new row for next item. I tried with giving index too as row.addView(addBtn,i) but still its not populating correctly. Please advise. Thanks.

Answer 1

Create an init() function and point the table layout. Then create the needed rows and columns.

   public void init() {             TableLayout stk = (TableLayout) findViewById(R.id.table_main);             TableRow tbrow0 = new TableRow(this);             TextView tv0 = new TextView(this);             tv0.setText(" Sl.No ");             tv0.setTextColor(Color.WHITE);             tbrow0.addView(tv0);             TextView tv1 = new TextView(this);             tv1.setText(" Product ");             tv1.setTextColor(Color.WHITE);             tbrow0.addView(tv1);             TextView tv2 = new TextView(this);             tv2.setText(" Unit Price ");             tv2.setTextColor(Color.WHITE);             tbrow0.addView(tv2);             TextView tv3 = new TextView(this);             tv3.setText(" Stock Remaining ");             tv3.setTextColor(Color.WHITE);             tbrow0.addView(tv3);             stk.addView(tbrow0);             for (int i = 0; i < 25; i++) {                 TableRow tbrow = new TableRow(this);                 TextView t1v = new TextView(this);                 t1v.setText("" + i);                 t1v.setTextColor(Color.WHITE);                 t1v.setGravity(Gravity.CENTER);                 tbrow.addView(t1v);                 TextView t2v = new TextView(this);                 t2v.setText("Product " + i);                 t2v.setTextColor(Color.WHITE);                 t2v.setGravity(Gravity.CENTER);                 tbrow.addView(t2v);                 TextView t3v = new TextView(this);                 t3v.setText("Rs." + i);                 t3v.setTextColor(Color.WHITE);                 t3v.setGravity(Gravity.CENTER);                 tbrow.addView(t3v);                 TextView t4v = new TextView(this);                 t4v.setText("" + i * 15 / 32 * 10);                 t4v.setTextColor(Color.WHITE);                 t4v.setGravity(Gravity.CENTER);                 tbrow.addView(t4v);                 stk.addView(tbrow);             }          } 

Call init function in your onCreate method:

@Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         requestWindowFeature(Window.FEATURE_NO_TITLE);         setContentView(R.layout.activity_main);          init();     } 

Layout file like:

 <ScrollView         android:id="@+id/scrollView1"         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:background="#3d455b"         android:layout_alignParentLeft="true" >          <HorizontalScrollView             android:id="@+id/hscrll1"             android:layout_width="fill_parent"             android:layout_height="wrap_content" >              <RelativeLayout                 android:id="@+id/RelativeLayout1"                 android:layout_width="fill_parent"                 android:layout_gravity="center"                 android:layout_height="fill_parent"                 android:orientation="vertical" >                  <TableLayout                     android:id="@+id/table_main"                     android:layout_width="wrap_content"                     android:layout_height="wrap_content"                     android:layout_centerHorizontal="true" >                 </TableLayout>             </RelativeLayout>         </HorizontalScrollView>     </ScrollView> 

Will look like: