Develop Reference

Modify columns width from code android

I would like to know if there is a way to modify the width of two columns in a table layout (with three columns in total).
The problem is that every column has the same width and a lot of space is wasted because the first two only contain an id and a date meanwhile the last one contains a multiline description.
This is the code in which the table layout is populated:
tr_head.setLayoutParams(new LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));
tr_head.setBackgroundColor(Color.rgb(0, 230, 230));
TextView lblSystemStoricalHeaderId = new TextView(this);
lblSystemStoricalHeaderId.setText("ID ");
tr_head.addView(lblSystemStoricalHeaderId);
TextView lblSystemStoricalHeaderData = new TextView(this);
lblSystemStoricalHeaderData.setText("Data");
tr_head.addView(lblSystemStoricalHeaderData);
TextView lblSystemStoricalHeaderDescription = new TextView(this);
lblSystemStoricalHeaderDescription.setText(" Descrizione");
tr_head.addView(lblSystemStoricalHeaderDescription);
tr_head.setMinimumHeight(30);
tlSystemStorical.addView(tr_head, new TableLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));
for(int i=0;i<reportList.length;i++){
TableRow tr = new TableRow(this);
tr.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));
TextView lblSystemStoricalId = new TextView(this);
lblSystemStoricalId.setText(""+reportList[i].getId()+"");
tr.addView(lblSystemStoricalId);
TextView lblSystemStoricalData = new TextView(this);
long dataC = reportList[i].getDate()*1000;
java.util.Date df = new java.util.Date(dataC);
String vv = new SimpleDateFormat("dd/MM/yyyy").format(df);
lblSystemStoricalData.setText(vv);
tr.addView(lblSystemStoricalData);
TableRow.LayoutParams tv3Params = new TableRow.LayoutParams();
tv3Params.width=0;
tv3Params.weight=1;
TextView lblSystemStoricalDescription = new TextView(this);
lblSystemStoricalDescription.setText(""+reportList[i].getReportDescription());
lblSystemStoricalDescription.setLayoutParams(tv3Params);
tr.addView(lblSystemStoricalDescription);
tr.setBackgroundResource(R.drawable.border);
tr.setMinimumHeight(40);
tlSystemStorical.addView(tr, new TableLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.WRAP_CONTENT));
}
and this is the xml file:
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/scroll_view_system_description"
>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<TableLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:stretchColumns="*"
android:id="#+id/tl_system_storical"
>
</TableLayout>
</FrameLayout>
</ScrollView>

You can set width property to 0 for TableRow children, but specify layout_weight for them. So you'd write:
float[] weights = new float[] { 0.2f, 0.2f, 0.6f};
TextView lblSystemStoricalId = new TextView(this);
lblSystemStoricalId.setLayoutParams(new TableRow.LayoutParams(0, ViewGroup.LayoutParams.MATCH_PARENT, weights[0]))
Where 0 is no width for view (because you're using weights), and weights array contains weights for your three views.
These weights should sum up to 1, and each weight is percent of the width that the column should take. So you need to assign weights to your TableRow children - lblSystemStoricalId would get weights[0], lblSystemStoricalData would get weights[1] and lblSystemStoricalDescription would have weights[2].

TableRow is being added but doesn't display

I have a small app that periodically needs a table row added to the tablelayout. Per the getChildCount() method the row is being added but it doesn't display. Any suggestions would be greatly appreciated
TableLayout tbl = (TableLayout)findViewById(R.id.mytbl);
TableRow row = new TableRow(this);
LinearLayout ll = new LinearLayout(this);
TextView txtView = new TextView(this);
row.setId(1234);
row.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT,TableRow.LayoutParams.WRAP_CONTENT));
row.setGravity(Gravity.CENTER);
row.setBackgroundResource(android.R.color.darker_gray);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT,1.0f);
ll.setId(1589);
ll.setLayoutParams(lp);
ll.setOrientation(LinearLayout.VERTICAL);
ll.setBackgroundResource(R.color.header_background);
ll.setGravity(Gravity.CENTER);
String msg = "Sample Text";
txtView.setId(657);
txtView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
txtView.setTextColor(R.color.a_color);
txtView.setBackgroundResource(R.drawable.border_a);
txtView.setGravity(Gravity.TOP | Gravity.LEFT);
txtView.setText(msg);
ll.addView(txtView);
row.addView(ll);
tbl.addView(row,new TableLayout.LayoutParams(TableLayout.LayoutParams.FILL_PARENT, TableLayout.LayoutParams.WRAP_CONTENT));//maybe add this with layout params tl.addView(tr,new TableLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
i've tried tbl.RequestLayout() and tbl.Invalidate() but no help. The table is wrapped in a scrollview which is my best guess as to where the problem is. I've been tinkering with this for several hours so a nudge in the right direction sure would be helpful
<ScrollView
android:id="#+id/scrVw_lst"
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<TableLayout
android:id="#+id/mytbl"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:stretchColumns="*">

Have you run the code for adding a row in your TableLayout? I've simulated adding a row on a click of a Button and I get a awkward Divide by 0 exception.
Anyway, change the LayoutParams of the enclosing Linearlayout to TableRow.LayoutParams(its parent is the TableRow):
TableRow.LayoutParams lp = new TableRow.LayoutParams(
TableRow.LayoutParams.FILL_PARENT,
TableRow.LayoutParams.WRAP_CONTENT, 1.0f);
ll.setId(1589);
ll.setLayoutParams(lp)
Also, if this doesn't solve the problem, try to add:
android:fillViewport="true"
to the ScrollView tag in the xml layout.

Add TableRow dynamically to linearlayout android

I need to dynamically add some tablerows to a linearlayout in my app. I write this code:
LinearLayout tabella = (LinearLayout) findViewById(R.id.tabella_contatori);
for(int i =0; i<array_list.size(); i++){
TableRow row = new TableRow(getApplicationContext());
row.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
TextView data = new TextView(getApplicationContext());
data.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 0.2f));
data.setTextAppearance(getApplicationContext(), android.R.attr.textAppearanceMedium);
data.setTextColor(Color.BLACK);
data.setBackgroundColor(Color.WHITE);
data.setPadding(2, 0, 0, 0);
data.setText("asd");
row.addView(data);
tabella.addView(row);
}
}
But when I open the app nothing appens. I already check if array_list.size is bigger than 0.
How can I do?
Thanks, Mattia

The problem is in your TextView Layout Params. The type should be TableRow.LayoutParams not LinearLayout.LayoutParams.
data.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.WRAP_CONTENT, TableRow.LayoutParams.WRAP_CONTENT));

Take Table layout and try using this in your main.xml ...
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/myTableLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView android:text="Some Text"/>
</TableRow>
</TableLayout>
in your Activity
this.setContentView(R.layout.main);
/* Find Tablelayout defined in main.xml */
TableLayout tl = (TableLayout)findViewById(R.id.myTableLayout);
/* Create a new row to be added. */
TableRow tr = new TableRow(this);
tr.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
/* Create a TextView to be the row-content. */
TextView data = new TextView(getApplicationContext());
data.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT, 0.2f));
data.setTextAppearance(getApplicationContext(), android.R.attr.textAppearanceMedium);
data.setTextColor(Color.BLACK);
data.setBackgroundColor(Color.WHITE);
data.setPadding(2, 0, 0, 0);
data.setText("asd");
/* Add TextView to row. */
tr.addView(data);
/* Add row to TableLayout. */
tl.addView(tr,new TableLayout.LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));

TableRow programmatically added does not display

In my xml layout, I have
<TableLayout
android:id="#+id/gridview"
android:layout_height="fill_parent"
android:layout_width="fill_parent" >
</TableLayout>
and in activity
setContentView(R.layout.main);
/* Find Tablelayout defined in main.xml */
TableLayout tl = (TableLayout)findViewById(R.id.gridview);
/* Create a new row to be added. */
TableRow tr = new TableRow(this);
tr.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
/* Create a Button to be the row-content. */
Button b = new Button(this);
b.setText("Dynamic Button");
b.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
/* Add Button to row. */
tr.addView(b);
/* Add row to TableLayout. */
tl.addView(tr,new TableLayout.LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
But the button and textview in the tablelayout does not display. Any idea why?

Make sure you use LayoutParams of TableLayout otherwise your LayoutParams will have no effect on TableRow, something like this:
TableRow tr = new TableRow(this);
tr.setLayoutParams(new TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT,TableLayout.LayoutParams.WRAP_CONTENT));
or simply import only TableLayout.LayoutParams i.e
import android.widget.TableLayout.LayoutParams;

try removing this:
TableRow tr = new TableRow(this);
tr.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));

No Textview occurs in TableLayout

No Textview occurs in this TableLayout. I don't know why.
I want to make the entries manually.
Another question, how can I add a horizontal line?
Code:
super.onCreate(savedInstanceState);
setContentView(R.layout.overview);
loadData();
TableLayout tl = (TableLayout)findViewById(R.id.tl);
TableRow tr = new TableRow(this);
TextView tv = new TextView(this);
TextView tv2 = new TextView(this);
//tv.se
tv.setGravity(Gravity.LEFT);
tv2.setGravity(Gravity.RIGHT);
tv.setText("Test");
tv2.setText("Test ");
tv.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f));
tv2.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f));
//tv.setTextSize(50);
//tv2.setTextSize(50);
tr.addView(tv);
tr.addView(tv2);
tl.addView(tr);
setContentView(tl);
Layout:
<?xml version="1.0" encoding="utf-8"?>
<TableLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/tl">
</TableLayout>

The problem could be that you aren't setting any LayoutParams for your TableRow.
Try doing something like this:
tr.setLayoutParams(new ViewGroup.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
Also if you want to add a horizontal line you can simply add a new View object and set its layout_height to 1dp and its backgroundColor to Color.BLACK, or whatever height/color combination you want

setContentView(R.layout.main);
TableLayout tl = (TableLayout)findViewById(R.id.tl);
TableRow tr = new TableRow(this);
TextView tv = new TextView(this);
TextView tv2 = new TextView(this);
//tv.se
tv.setGravity(Gravity.LEFT);
tv2.setGravity(Gravity.RIGHT);
tv.setText("Test");
tv2.setText("Test ");
tr.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
// tv2.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f));
//tv.setTextSize(50);
//tv2.setTextSize(50);
tr.addView(tv);
tr.addView(tv2);
tl.addView(tr);
main.xml
<TableLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/tl">
</TableLayout>
add new horizontal line using