TableLayout Without XML, Nothing Appears on Screen

Question

I was trying to create TableLayout Without XML, Nothing Appears on Screen. Below is my code. Please let me know what is the mistake?

Code :

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.act);
        TableLayout tlMain =(TableLayout)findViewById(R.id.tlMain);
        LayoutInflater inflater = getLayoutInflater();

        FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(
        ViewGroup.LayoutParams.FILL_PARENT,
        ViewGroup.LayoutParams.FILL_PARENT);
        tlMain.setLayoutParams(lp);


        tlMain.setStretchAllColumns(true);  
        tlMain.setShrinkAllColumns(true); 


        TableLayout.LayoutParams rowLp = new TableLayout.LayoutParams(
                ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        rowLp.weight=1;

        TableRow.LayoutParams cellLp = new TableRow.LayoutParams(
                ViewGroup.LayoutParams.FILL_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);

        for(int i=0;i<4;i++)
        {   
            TableRow tableRow = new TableRow(this);

            for (int j = 0; j < 4; j++) {
                TextView number2 = new TextView(this);
                number2.setTextColor(color.black);               
                number2.setText(String.valueOf(i));                
                tableRow.addView(number2,cellLp);
                tableRow.setGravity(Gravity.CENTER_HORIZONTAL);               
            }
            tlMain.addView(tableRow,rowLp);              
        }
        setContentView(tlMain);    
    }

Answer 1

    This is How it started Working.

    @Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);

 TableLayout table = new TableLayout(this);  
     table.setStretchAllColumns(true);
     table.setShrinkAllColumns(true);
     TableRow rowTitle = new TableRow(this);
     rowTitle.setGravity(Gravity.CENTER_HORIZONTAL);
     TableRow.LayoutParams trparams = new   TableRow.LayoutParams(android.widget.TableRow.LayoutParams.WRAP_CONTENT, android.widget.TableRow.LayoutParams.WRAP_CONTENT);
    rowTitle.setLayoutParams(trparams); 
    rowTitle.setGravity(Gravity.CENTER_HORIZONTAL); 
    TableRow rowDayLabels = new TableRow(this);
    TableRow rowAmounts = new TableRow(this);
    TextView empty = new TextView(this);
    empty.setText("Empty");
    TextView title = new TextView(this);
    title.setLayoutParams(trparams);
    table.setLayoutParams(trparams);
    title.setText("WikiCode");
    rowTitle.addView(title);
    rowTitle.addView(empty);
    table.addView(rowTitle);
    for(int i=0;i<4;i++)
    {   
        TableRow tableRow = new TableRow(this);
        tableRow.setLayoutParams(trparams);
        for (int j = 0; j < 4; j++) {
            TextView number2 = new TextView(this);
            number2.setLayoutParams(trparams);               
            number2.setText("check"+i);                
            tableRow.addView(number2);
            tableRow.setGravity(Gravity.CENTER_HORIZONTAL);               
        }
        table.addView(tableRow);              
    }


    setContentView(table);
}

Answer 2

If you want to create TableLayout without using layout-xml then

Try with this

 TableLayout tlMain = new TableLayout(this);

Instead of

setContentView(R.layout.act);
TableLayout tlMain =(TableLayout)findViewById(R.id.tlMain); 

Answer 3

Instead of using

setContentView(tlMain);  

use

mainlayout.addView(tlMain);

where mainlayout could be linear or relative layout or any other container, which wrap your table.

Answer 4

change:

 FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(
        ViewGroup.LayoutParams.FILL_PARENT,
        ViewGroup.LayoutParams.FILL_PARENT);

to

 ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(
        ViewGroup.LayoutParams.FILL_PARENT,
        ViewGroup.LayoutParams.FILL_PARENT);

also don't call:

setContentView(tlMain);

Assuming that you have a table layout in R.layout.act

Try to change:

 TableLayout.LayoutParams rowLp = new TableLayout.LayoutParams(
                ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);

to:

 TableLayout.LayoutParams rowLp = new TableLayout.LayoutParams(
                ViewGroup.LayoutParams.FILL_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);

My guess is that you have a table row with width Wrap_content and a Textview inside it with width fill_parent.

This are contradictory statements and android is not able to draw it.