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How to update the textview dynamically created textview in childlayout?

LinearLayout lay1 = (LinearLayout) findViewById(R.id.lay1);
for(int i=0;i<list1.size();i++) {
View child = lay1.getChildAt(i);
LinearLayout lay3 = (LinearLayout) child.findViewById(R.id.lay3);
for (j = 0; j <list2.size(); j++) {
View child1 = lay3.getChildAt(j);
// View hiddenInfo11 = getActivity().getLayoutInflater().inflate(R.layout.add_inner_item, lay3 , false);
final TextView name = (TextView) child1.findViewById(R.id.name);
name.setText("new");
}
}
XML Layout:
<LinearLayout
android:id="#+id/lay1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="4dp"
android:orientation="horizontal">
</LinearLayout>
<LinearLayout
android:id="#+id/lay2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="4dp"
android:background="#color/white"
android:orientation="horizontal">
</LinearLayout>
add_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<LinearLayout
android:id="#+id/lay3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:orientation="vertical">
</LinearLayout>
</LinearLayout>
add_inner_item.Xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
>
<TextView android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="" />
</LinearLayout>
Added View Dynamically using the following method.
for(int i=0;i<list.size();i++) {
View hiddenInfo = getActivity().getLayoutInflater().inflate(R.layout.add_item, lay, false);
LinearLayout lay3 = (LinearLayout) hiddenInfo.findViewById(R.id.lay3);
lay1.addView(hiddenInfo);
for (j = 0; j < list2.size(); j++) {
View hiddenInfo1 = getActivity().getLayoutInflater().inflate(R.layout.add_inner_item, lay3, false);
final TextView name = (TextView) hiddenInfo1.findViewById(R.id.name);
name.setText(list2.get(j).get("Name"));
lay3.addView(hiddenInfo1);
}
I have one Layout with creating dynamically and I want to update the child textview from outside of the button click view.I have tried this code.But nothing is changed.Can anyone give suggestion to this sample.

You are looking for "lay2" inside the "lay1" container. According to your XML layout, they are not nested, so you won't be able to find it this way. Change it to this:
LinearLayout lay2 = (LinearLayout) findViewById(R.id.lay2);
You should get the actual lay2 container. I'm not sure whether the text views are there though since I have seen your code for the views' creation.
EDIT:
I've not specified a parent - you should use the Activity for this. Something like:
LinearLayout lay2 = (LinearLayout) MyActivity.this.findViewById(R.id.lay2);

Dynamic TableLayout Android

I am creating a android application where i have to show contents of sqlite in Android app.
So i decide to use TableLayout here.But the main point here is that columns and rows from sqlite database is not previously decided,so i need to create that type of layout that deal with dynamic columns and rows.
So here what i am doing is that i have created a layouts sublayout.xml, cells.xml ,mainlayout.xml.
sublayout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:id="#+id/subLayout_" >
</LinearLayout>
In this layout i am dynamically adding cells using cells.xml.
cells.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<TextView
android:id="#+id/cell_"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Cell"
android:textSize="25dp"/>
</LinearLayout>
And when my one row gets ready i simply added it to mainlayout.xml.
mainlayout.xml
<?xml version="1.0" encoding="utf-8"?>
<TableLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TableRow
android:id="#+id/tableRow1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<LinearLayout
android:id="#+id/tableLayout_"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"></LinearLayout>
</TableRow>
</TableLayout>
But i am getting nullpointer exception here.
Here is my class code.
LinearLayout layout,subLayout_;
layout=(LinearLayout)findViewById(R.id.tableLayout_);
subLayout_=(LinearLayout)findViewById(R.id.subLayout_);
for (int i = 0; i < columns.length; i++) {
Log.e("Column name", ""+columns[i]);
View v=inflater.inflate(R.layout.cells, null);
TextView tv=(TextView)v.findViewById(R.id.cell_);
tv.setText(columns[i]);
subLayout_.addView(v);
}
layout.addView(subLayout_);
Please help me what i am doing wrong here ?

Try this
layout = (LinearLayout) findViewById(R.id.tableLayout_);
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View vi = inflater.inflate(R.layout.sublayout, null);
subLayout_ = (LinearLayout) vi.findViewById(R.id.subLayout_);
for (int i = 0; i < columns.length; i++) {
Log.e("Column name", "" + columns[i]);
ViewGroup v = (ViewGroup) inflater.inflate(R.layout.cells, null);
TextView tv = (TextView) v.findViewById(R.id.cell_);
tv.setText(columns[i]);
subLayout_.addView(v);
}
layout.addView(subLayout_);

You could try this approach here.
Design your xml like this:
<TableLayout>
<Tablerow>
<Add your views here dynamically>
</TableRow>
</TableLayout>
Create the textviews dynamically and go on adding it to the TableRow and finally add the TableRow to the TableLayout.

Android: setting text in each new view within a for loop

So I have an XML layout1 which is just a LinearLayout with three text views. I also have another XML layout2 with ScrollView and a LinearLayout inside it. I'm using this for loop to create several of the layout2 inside the LinearLayout of the ScrollView. It's working fine but I want to be able to set the text of each of the TextViews within the for loop. I'm not sure how to access these TextViews as I can only set one id within the XML file, will that not cause problems if I tried to access their id inside the for loop?
private void setUpResults() {
for (int i = 1; i < totalQuestions; i++) {
parent.addView(LayoutInflater.from(getBaseContext()).inflate(
R.layout.result_block, null));
}
}
Here is the result_block xml file (layout1) :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/layoutSelectedAnswer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/border"
android:orientation="horizontal"
android:paddingBottom="#dimen/option_padding_bottom"
android:paddingTop="#dimen/option_padding_top" >
<TextView
android:id="#+id/tvOptionALabel2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="4dp"
android:text="#string/option_a"
android:textColor="#color/white"
android:textSize="#dimen/option_text_size" />
<TextView
android:id="#+id/tvSelectedAnswer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="4dp"
android:text="#string/option"
android:textColor="#color/white"
android:textSize="#dimen/option_text_size" />
</LinearLayout>
<LinearLayout
android:id="#+id/layoutCorrectAnswer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/border"
android:orientation="horizontal"
android:paddingBottom="#dimen/option_padding_bottom"
android:paddingTop="#dimen/option_padding_top" >
<TextView
android:id="#+id/tvOptionBLabel2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="4dp"
android:text="#string/option_b"
android:textColor="#color/white"
android:textSize="#dimen/option_text_size" />
<TextView
android:id="#+id/tvCorrectAnswer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="4dp"
android:text="#string/option"
android:textColor="#color/white"
android:textSize="#dimen/option_text_size" />
</LinearLayout>
</LinearLayout>
Let's say I wanted to set the TextView with the id as tvCorrectAnswer to a different String value in each loop, how should I access it?

Sure, you can do it like this:
private void setUpResults () {
LayoutInflater i = LayoutInflater.from(getBaseContext());
for (int i = 1 /* should be zero? */; i < totalQuestions; i++) {
View view = i.inflate(R.layout.result_block, parent, false);
TextView correctAnswer = (TextView) view.findViewById(R.id.tvSelectedAnswer);
correctAnswer.setText("My Answer Text");
parent.addView(view);
}
}
The key is, inflate using the parent as the container, but don't attach it (the false parameter). Then you'll get a reference to the inflated view, which you can then directly reference to do your findViewById() calls (which will limit the search to that particular ViewGroup). Then add it to the parent and continue to the next item.

Once you have added all your views in your ViewGroup you can use ViewGroup.getChildAt(int) to get a one of the views you have inserted. Once you get one of the views you can access any of its inner views. Something like this.
for(int i = 0; i < parentView.getChildCount();++i) {
View v = parentView.getChildAt(i);
Textview tv = (TextView) v.findViewById(R.id.tvOptionALabel2);
//And so on...
}

MonoDroid: Iterate over the controls in an Activity?

In Activity.OnContentChanged, I would like to iterate over all of the controls to look get their Tags.
I assume it has something to do with base.Window.HasChildren, but I can't figure out how to actually get the children.
EDIT: ViewGroup, the base class for most layouts, has GetChildCount and GetChildAt. But I still can't figure out how to get from the Activity to that root-level layout.

You can assign an ID to the root element of your layout and access it through that:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/Root"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="1"/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="2"/>
</LinearLayout>
Then in your activity you could do something like:
var root = FindViewById<LinearLayout>(Resource.Id.Root);
for (int i = 0; i < root.ChildCount; i++)
{
Console.WriteLine(root.GetChildAt(i).Id);
}

var viewGroup = this.Window.DecorView as ViewGroup;
if(viewGroup != null){
for (int i = 0; i < view.ChildCount; i++)
{
var control = view.GetChildAt(i);
}
}

How do you add dynamically a view from xml file, I want to add TableRow in RelativeLayout

I am trying to add table row dynamically in my activity. The table row is in the relative layout. It looks fine but don't know where I am going wrong. Below is my code
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
RelativeLayout RLayout = (RelativeLayout)findViewById(R.id.RelativeLayout);
TableRow tableRow = (TableRow)findViewById(R.id.TableRow);
for(int i = 1; i <3; i++)
RLayout.addView(tableRow); //My code is crashing here
}
And the main.xml as follows
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:id="#+id/RelativeLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android"
>
<TableRow
android:id="#+id/TableRow"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
>
<TextView
android:id="#+id/Text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Text"
>
</TextView>
</TableRow>
</RelativeLayout>
Please Help.

It's crashing because that TableRow is already in the layout. If you want to add some dynamically you have to create it programmatically, that is:
// PSEUDOCODE
TableRow newRow = new TableRow(this);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(/*....*/);
newRow.setLayoutParams(lp);
relLayout.add(newRow);
Actually TableRow should be used inside TableLayout.
If you want to use something more than once, you can use the inflate technique. You need to create an xml layout that includes the only part that you want to repeat (so your TableRow and its children), and then:
LayoutInflater inflater =
(LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View inflated = inflater.inflate(R.layout.your_layout, null);
Now inflated contains the layout you specified. Instead of null, you might want to put there the layout to which attach the inflated one. Every time you need a new element like that, you would have to inflate it the same way.
(You should always report the error you get when it crashes)
------ EDIT -----
ok now i see, this is your code:
RelativeLayout RLayout = (RelativeLayout)findViewById(R.id.RelativeLayout);
TableRow tableRow = (TableRow)findViewById(R.id.TableRow);
for(int i = 1; i <4; i++) {
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View inflated = inflater.inflate(R.layout.main, tableRow);
}
this way you're inflating your whole layout inside the original TableRow.
You should have a row.xml layout like this, together with the main.xml:
<?xml version="1.0" encoding="utf-8"?>
<TableRow xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/TableRow"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
>
<TextView
android:id="#+id/Text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Text"
/>
</TableRow>
and then inflate it like this:
RelativeLayout RLayout = (RelativeLayout)findViewById(R.id.RelativeLayout);
for(int i = 1; i <4; i++) {
LayoutInflater inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.row, RLayout);
}
see if it works.