Develop Reference

DataTable in a fragment, pulling from SQLite...not able to show the table after all rows are loaded

I am working on a DataTable in a Fragment that pulls data from a SQLite database and will display it in a table that is browsable up and down and side to side. I am having a difficult time getting the final table to show after the FOR loop iterates. I think that the problem lies in the last line. What is the appropriate way to show the table after the last row is inserted? TIA...
public class DataTable extends Fragment {
SQLiteDatabase db;
String rowid, species, area, sampler;
TableRow tableRow;
TextView textView, textView1, textView2, textView3, textView4, textView5;
.
.
.
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
//View view = inflater.inflate(R.layout.datatable, container, false);
View view = inflater.inflate(R.layout.datatable, container, false);
//GridView gridView = (GridView) view.findViewById(R.id.grid); //this is fine
TableLayout tablelayout = (TableLayout)this.getActivity().findViewById(R.id.table);
DBAdapter msdb= new DBAdapter(getActivity().getApplicationContext(),"adfg", null);
db=msdb.getWritableDatabase();
showdata(view);
return view;
}
public void showdata(View view){
Cursor c = db.rawQuery("SELECT * FROM surveyDB",null);
int count= c.getCount();
c.moveToFirst();
TableLayout tableLayout = new TableLayout(getActivity().getApplicationContext
tableLayout.setVerticalScrollBarEnabled(true);
TableRow tableRow;
TextView textView,textView1,textView2,textView3,textView4,textView5;
tableRow = new TableRow(getActivity().getApplicationContext());
textView=new TextView(getActivity().getApplicationContext());
textView.setText("Rowid");
textView.setTextColor(Color.RED);
textView.setTypeface(null, Typeface.BOLD);
textView.setPadding(20, 20, 20, 20);
tableRow.addView(textView);
.
.
.
tableLayout.addView(tableRow)
for (Integer j = 0; j < count; j++)
{
tableRow = new TableRow(getActivity().getApplicationContext());
textView1 = new TextView(getActivity().getApplicationContext());
textView1.setText(c.getString(c.getColumnIndex("_id")));
//Toast.makeText(getActivity().getApplicationContext(), "SAVE Successful."+textView1+".", Toast.LENGTH_LONG).show();
textView2 = new TextView(getActivity().getApplicationContext());
textView2.setText(c.getString(c.getColumnIndex("species")));
textView3 = new TextView(getActivity().getApplicationContext());
textView3.setText(c.getString(c.getColumnIndex("area")));
//still need sampler...
textView1.setPadding(20, 20, 20, 20);
textView2.setPadding(20, 20, 20, 20);
textView3.setPadding(20, 20, 20, 20);
tableRow.addView(textView1);
tableRow.addView(textView2);
tableRow.addView(textView3);
tableLayout.addView(tableRow);
c.moveToNext() ;
}
c.close();
db.close();
// setContentView(tableLayout);
return ;
}
}

This works,
public class DataTable extends Fragment {
SQLiteDatabase database, db;
TableLayout tableLayout;
TableRow row;
TextView firstCol;
TextView secondCol;
TextView thirdCol;
TextView fourthCol;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.datatable, container, false);
tableLayout = (TableLayout) view.findViewById(R.id.table);
DBAdapter msdb= new DBAdapter(getActivity().getApplicationContext(),"adfg", null);
db=msdb.getWritableDatabase();
displayDB();
return view;
}
private void displayDB() {
Cursor c=db.rawQuery("SELECT * FROM surveyDB", null);
Integer index0=c.getColumnIndex("_id");
Integer index1 = c.getColumnIndex("species");
Integer index2 = c.getColumnIndex("area");
Integer index3 = c.getColumnIndex("sampler");
if(c.getCount()>0){
c.moveToFirst();
do{
row=new TableRow(getActivity());
row.setId(100);
row.setLayoutParams(new LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
//Setting up the first column parameters
firstCol=new TextView(getActivity());
firstCol.setText(c.getString(index0));
firstCol.setTextSize(12);
firstCol.setTextColor(Color.YELLOW);
firstCol.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
row.addView(firstCol);
//Setting up the second column parameters
secondCol=new TextView(getActivity());
secondCol.setText(c.getString(index1));
secondCol.setTextColor(Color.YELLOW);
secondCol.setTextSize(12);
secondCol.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
row.addView(secondCol); //adding coloumn to row
//Setting up the third column parameters
thirdCol=new TextView(getActivity());
thirdCol.setText(c.getString(index2));
thirdCol.setTextColor(Color.YELLOW);
thirdCol.setTextSize(12);
thirdCol.setLayoutParams(new LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
row.addView(thirdCol); //adding column to row
//Setting up fourth column parameters
fourthCol=new TextView(getActivity());
fourthCol.setText(c.getString(index3));
fourthCol.setTextColor(Color.YELLOW);
fourthCol.setTextSize(12);
fourthCol.setLayoutParams(new LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
row.addView(fourthCol);
tableLayout.addView(row,new TableLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
}while(c.moveToNext());
db.close();
}else{
Toast.makeText(getActivity().getApplicationContext(), "Event occurred.", Toast.LENGTH_LONG).show();
}
}
}

Center TextView Programmatically on TableRow

I am trying to center a textview inside a tablerow, that is itself inside a tablelayout, but I guess I am missing something, because the TextView doesn't get centered :s
Here is my method:
private void insertClock() {
TableLayout table = new TableLayout(this);
table.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
table.setStretchAllColumns(true);
TableRow tbRow = new TableRow(this);
TableLayout.LayoutParams layoutRow = new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
clock = new TextView(this);
TableRow.LayoutParams layoutHistory = new TableRow.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
clock.setLayoutParams(layoutHistory);
clock.setText(calculateClockText());
tbRow.setLayoutParams(layoutRow);
table.addView(tbRow);
clock.setGravity(Gravity.CENTER_HORIZONTAL);
tbRow.addView(clock);
}
Thanks in advance ;)

Finnaly made it working !
Here is the solution:
private void insertClock(TableLayout table, String text) {
TableRow tbRow = new TableRow(this);
TableLayout.LayoutParams layoutRow = new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
tbRow.setLayoutParams(layoutRow);
clock = new TextView(this);
TableRow.LayoutParams layoutHistory = new TableRow.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
clock.setLayoutParams(layoutHistory);
clock.setText(text);
clock.setGravity(Gravity.CENTER);
tbRow.setGravity(Gravity.CENTER);
tbRow.addView(clock);
table.addView(tbRow);
}

I got a force close when adding table row programatically?

HI am doing table layout programatically for that when i add table row to the layout application shows force close can any body help me and following is my code
TableLayout tl = (TableLayout) findViewById(R.id.maintable);
TableRow tr = new TableRow(this);
TextView labelTV = new TextView(this);
TextView valueTV = new TextView(this);
// Go through each item in the array
for (int current = 0; current < numProvinces; current++)
{
// Create a TableRow and give it an ID
tr.setId(100+current);
tr.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
// Create a TextView to house the name of the province
labelTV.setId(200+current);
labelTV.setText(provinces[current]);
labelTV.setTextColor(Color.WHITE);
labelTV.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
tr.addView(labelTV);
// Create a TextView to house the value of the after-tax income
valueTV.setId(current);
valueTV.setText("$0");
valueTV.setTextColor(Color.WHITE);
valueTV.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
tr.addView(valueTV);
// Add the TableRow to the TableLayout
tl.addView(tr,new TableLayout.LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
setContentView(tl);
}

TableLayout tl = (TableLayout) findViewById(R.id.maintable);
TableRow[] tr;
TextView[] labelTV;
TextView[] valueTV;
tr = new TableRow[numProvinces];
labelTV = new TextView[numProvinces];
valueTV= new TextView[numProvinces];
tl.removeAllViews();
tl.refreshdrawablestate();
for (int current = 0; current < numProvinces; current++)
{
tr[current] = new TableRow(this);
labelTV[current] = new TextView(this);
labelTV[current] = new TextView(this);
// Create a TableRow and give it an ID
tr.setId(100+current);
tr.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
// Create a TextView to house the name of the province
labelTV.setId(200+current);
labelTV.setText(provinces[current]);
labelTV.setTextColor(Color.WHITE);
labelTV.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
tr.addView(labelTV);
// Create a TextView to house the value of the after-tax income
valueTV.setId(current);
valueTV.setText("$0");
valueTV.setTextColor(Color.WHITE);
valueTV.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
tr.addView(valueTV);
// Add the TableRow to the TableLayout
tl.addView(tr,new TableLayout.LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
}
setContentView(tl);

TableLayout tl = (TableLayout) findViewById(R.id.maintable);
for (int current = 0; current < numProvinces; current++)
{
TableRow tr = new TableRow(this);
TextView labelTV = new TextView(this);
TextView valueTV = new TextView(this);
/// Do your stuff
tr.addView(labelTV );
tr.addView(valueTV );
tbl.addView(tr);
}
Try this answer

The view already exist may be the Exception you are getting so,
TableRow tr = new TableRow(this);
add the above line in side for loop..
This is happening because you are trying to add same TableRow again and again..
Updated:
try this
tl.addView(tr);
instead of
tl.addView(tr,new TableLayout.LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));

I tested your code with a change in xml file and it work. I post my code so that you can compare with your own one.
I copy your code:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//I add some data for test here:
int numProvinces = 5;
String[] provinces =new String[]{"1","2","3","4","5"};
//below is the same with your code:
TableLayout tl = (TableLayout) findViewById(R.id.maintable);
// Go through each item in the array
for (int current = 0; current < numProvinces; current++)
{
TableRow tr = new TableRow(this);
TextView labelTV = new TextView(this);
TextView valueTV = new TextView(this);
// Create a TableRow and give it an ID
tr.setId(100+current);
tr.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
// Create a TextView to house the name of the province
labelTV.setId(200+current);
labelTV.setText(provinces[current]);
labelTV.setTextColor(Color.WHITE);
labelTV.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
tr.addView(labelTV);
// Create a TextView to house the value of the after-tax income
valueTV.setId(current);
valueTV.setText("$0");
valueTV.setTextColor(Color.WHITE);
valueTV.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
tr.addView(valueTV);
// Add the TableRow to the TableLayout
tl.addView(tr,new TableLayout.LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
setContentView(tl);
}
}
and this is my main layout (main.xml)
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/maintable"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>

How to get list of product in memory in Android

I have list of product.That may be contain 5000 records.I put pagination.First It load 50 records.Then if we press next option(>) then load next 50 option likewise.I designed table-layout.
ArrayList<Product> productList = new ArrayList<Product>();
productList = getProducts();
TableLayout tl;
tl = (TableLayout) findViewById(R.id.tableLayout1);
if(productList.size() >0){
for (int i = 0; i < productList.size(); i++) {
TableRow tr = new TableRow(this);
tr.setTag(i);
TableLayout.LayoutParams tableRowParams = new TableLayout.LayoutParams(TableLayout.LayoutParams.WRAP_CONTENT,TableLayout.LayoutParams.WRAP_CONTENT);
int leftMargin=10;
int topMargin=2;
int rightMargin=10;
int bottomMargin=2;
tableRowParams.setMargins(leftMargin, topMargin, rightMargin, bottomMargin);
TextView txtCode = new TextView(this);
TextView txtDes = new TextView(this);
EditText txtQty = new EditText(this);
TextView txtVal = new TextView(this);
TextView txtDisVal = new TextView(this);
TextView txtDisQty = new TextView(this);
txtQty.setId(i);
txtQty.setFocusable(true);
txtQty.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
txtQty.setHeight(5);
txtQty.setInputType(InputType.TYPE_NUMBER_FLAG_DECIMAL);
createView(tr, txtCode, productList.get(i).getProductCode());
createView(tr, txtDes, productList.get(i).getDescription());
txtQty.setText(Double.toString(productList.get(i).getPrice()));
tr.addView(txtQty);
createView(tr, txtVal,"Value");
createView(tr, txtDisVal,"0.00");
createView(tr, txtDisQty,"0");
tr.setOnClickListener(new View.OnClickListener(){
public void onClick(View view){
System.out.println("Row Clicked with tag " + view.getTag());
}
});
tl.addView(tr);
}
}
}
public void createView(TableRow tr, TextView t, String viewdata) {
t.setText(viewdata);
t.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
t.setTextColor(Color.DKGRAY);
t.setPadding(1, 0, 0, 0);
tr.setPadding(0, 0, 0, 0);
tr.addView(t);
}
This is my implementation.I didn't implement pagination part yet.
How can I get it into the memory and load it?
Please help me

I suggest you create a function to get products with a param pageindex。
Then you can set a trigger which activated by pagination event。
And update you UI by a handler

TableRow dynamically created with different contents

I am creating TableRows dynamically. And there are two types of content for these TableRows.
Some have 4 Views.
And some have 2 Views.
The problem is that TableRows with two, try to occupy the same space as the layout of which have four.
This is happening:
Img ThisTextViewHasThisSize
Img TV0 __________________TV1 TV2
...
TableLayout tl = (TableLayout) findViewById(R.id.myTableLayout);
for (int i = 0; i < array.length; i++) {
TableRow tr = new TableRow(this);
ImageButton button = new ImageButton(this);
tr.addView(button);
TextView tv0 = new TextView(this);
tv0.setText(array[i].something0());
if (another type of TableRow) {
TextView tv1 = new TextView(this);
TextView tv2 = new TextView(this);
tv1.setText(array[i].something1());
tv2.setText(array[i].something2());
tr.addView(tv1);
tr.addView(tv2);
}
tr.addView(tv0);
tl.addView(tr);
}
Someone can tell me how to let the TableRows layouts totally independent from each other?

You can set the span of a view within the table by using TableRow.LayoutParams. Eg:
TableRow tr = new TableRow(this);
//all rows have this button
ImageButton button = new ImageButton(this);
tr.addView(button);
TextView tv0 = new TextView(this);
tv0.setText("hey");
if (some condition == true) {
TextView tv1 = new TextView(this);
TextView tv2 = new TextView(this);
tv1.setText("heay 2");
tv2.setText("hey 3");
tr.addView(tv0);
tr.addView(tv1);
tr.addView(tv2);
}else {
TableRow.LayoutParams trlp = new TableRow.LayoutParams();
trlp.span = 3;
tv.setLayoutParams(trlp);
tr.addView(tv0);
}