Develop Reference

Access dynamically created EditTexts

I am using the following to add EditTexts along with cancel buttons dynamically to my main activity.
JAVA
LinearLayout root = (LinearLayout) findViewById(R.id.root_layout);
for(int i=0;i<numberOfEditTexts;i++)
{
LinearLayout editText = (LinearLayout) LayoutInflater.from(this).inflate(R.layout.edittexts,root,false);
editText.setId(View.generateViewId());
root.addView(editText);
}
edittexts XML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="#+id/editText"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:singleLine="true"
android:ems="10"
android:hint="#string/hint_email_id" >
<requestFocus />
</EditText>
<ImageButton
android:id="#+id/buttonDelete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/cancel_button"
android:onClick="deleteRow"
android:layout_gravity="center"/>
</LinearLayout>
I am already using generateViewId(). Does that ensure unique ids?
More importantly, I want to get/set texts individually on all dynamically created EditTexts. How can I access them?

when adding views they go one below another even if width is wrap content

I have a Linear layout then programatically I'm adding some spinners and buttons and so on, but I have xml button Wrap content (width) and then on java I add spinner (or anything else) and it goes below this view even if both views are wrap content:
progBar = new ProgressBar(this);
pBarToca = new ProgressBar(this);
pBarToca.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));
linToca = (LinearLayout) findViewById(R.id.tetoca);
linToca.addView(pBarToca);
and it's placed under the button of xml:
<LinearLayout android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" android:layout_marginTop="6dp"
android:id="#+id/tetoca">
<TextView style="#style/StylePartida"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/te_toca_jugar" />
<Button android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#A7E9A9" android:onClick="callJugar"
android:text="#string/jugar" />
</LinearLayout>
edit!!!!!!
I want textview on first line then on next line button + progressbar (for example)

You have android:orientation=vertical so the Views will be laid out starting at the top and going down.
If you want them to all be next to each other, remove that from your xml since the default orientation for a LinearLayout is horizontal. If you do this, you will obviously need to change the android:width to wrap_content for your TextView or else it will take up the entire screen.
After your comment, a RelativeLayout would work best here.
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<TextView
style="#style/StylePartida"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/te_toca_jugar"
android:id="#+id/tvID" /> // give it an id
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="6dp"
android:id="#+id/tetoca"
android:layout_below="#/id=tvID"> // place it below the TV
<Button android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#A7E9A9" android:onClick="callJugar"
android:text="#string/jugar" />
</LinearLayout>
</RelativeLayout>
Note the changes in the comments. Now when you add your progressbar to the LL, it should be next to the Button. You may need some changes but this should give you approximately what you want.

<LinearLayout android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="6dp"
android:id="#+id/tetoca">
<TextView style="#style/StylePartida"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/te_toca_jugar"
android:text="#string/te_toca_jugar" />
<Button android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#A7E9A9" android:onClick="callJugar"
android:text="#string/jugar" />
</LinearLayout>

In your textView you are matching the parent
android:layout_width="match_parent"
This will cause the textview to take up the entire width of the parent view.
android:layout_width="wrap_content"
and
android:orientation="horizontal"
android:orientation="vertical" will cause the elements to be stacked.
If you are using "horizontal" it's important not to have a child element with width matching parent.
EDIT:
After OPs change to question:
I have used a textview, two buttons and listview to give you an idea of how you can format it. There are many ways to achieve the same thing, this is one suggestion.
The internal linearlayout has a horizontal orientation (by default).
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="6dp"
android:orientation="vertical">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="te_toca_jugar"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#A7E9A9"
android:text="jugar"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#A7E9A9"
android:text="jugar2"/>
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/lv">
</ListView>
</LinearLayout>
</LinearLayout>

Android Calculator App - Some Questions

I'm new to android application development. I'm trying to create a calculator application, and I got 2 questions to ask.
1.
How can I create a new row in LinearLayout?
It's currently looking like this:
[textview][textview][button]
And I want it to look like this:
[textview][textview]
[button]
This is my xml code:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity" >
<TextView
android:id="#+id/number1"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="#string/number1" />
<TextView
android:id="#+id/number2"
android:layout_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="#string/number2" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/button_calculate" />
2. How can I process the sum of "number1" and "number2" Textviews and display it on the Main Activity (where the TextViews are)?

Linear layout can be horizontal or vertical, if you need rows and columns you need to work with relative layout or just add more then one linear layout such as..
TextView txtvar = (TextView) findViewById(R.id.textViewIdFromXml);
txtvar.setText("blah");
this how you connect to textview element whit id textViewIdFromXml and set blah for text

Nested linear layouts.
For example (pseudo xml):
<Linear Layout : Vertical>
<Linear Layout : Horizontal>
<TextView />
<TextView />
</Linear Layout>
<Button />
</Linear Layout>
Edit: I tried the following in Eclipse and for me it does what I think you ask (though it doesn't look fancy):
<?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="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
</LinearLayout>

1st Ans: create a Vertical Linear Layout & use a Horinzental one nested in the Vertical one. But I prefer relative layout.
2ns Ans: use onClickListener() for the buttons. & under every onClickListener() change the text of Number display textbox using setText(). but on = button's onClickListener() use the value of Number display textbox using getText() and use it for + - or in * /

I click the button ,can add a data to the listView

I set one Gribview and one listview in an Activity,In the Gridview there is a TextView and a Button,What I want do is ,when I click the button ,can add a data to the listView .and the button and listView in different layout files.
the xml code is :
<?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="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:descendantFocusability="blocksDescendants"
>
<ImageView
android:id="#+id/image"
android:layout_width="180dp"
android:layout_height="160dp"
android:layout_gravity="fill"
android:padding="4dp"
android:scaleType="fitXY" />
<LinearLayout android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content">
<LinearLayout android:orientation="vertical" android:layout_weight="1" android:layout_width="wrap_content" android:layout_height="wrap_content">
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center_horizontal"
android:text="prices"
/>
<TextView
android:id="#+id/prices"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center_horizontal"
android:text="name"
/>
</LinearLayout>
<LinearLayout android:layout_width="0.0dip" android:layout_height="wrap_content" android:layout_weight="9" />
<Button
android:id="#+id/add"
android:layout_width="45dip"
android:layout_height="45dip"
android:layout_gravity="center"
android:gravity="center_horizontal"
android:text="+"
android:layout_weight="0.2"
android:textSize="12pt"
/>
</LinearLayout>
</LinearLayout>
I want to realize when I click the button ,the sequence number of the image I pick can add to the listView.
ADD:
maybe I didn't say it clear.I have gridView and listView in one layout file.In the gridView I define an layout file ,which contain an ImageView and a Button.What I realize is ,when the app run,I have obtain the button's action in getView,What I want:in button events ,how to write the position values in listView.I haven't got the solution yet ,it really bother me ,thankx for any help.
ADD2:
Now I have achieved the adapter.notifyDataSetChanged()adding data in ListView.but I don't know how to obtain the string variable in Acitivity,the string variable is given by text(TextView android:id="#+id/prices") in ListView to Activity.When I refresh View(adapter.notifyDataSetChanged()),I get "0". why?could anyone help?thank a lot.

You'll need to begin by adding a ListView to your layout file, and adding a button handler.
Take a look at Dynamically add elements to a listView Android
This links to a Stack Overflow question/answer that should get you started

RelativeLayout Stack Buttons

I would like to align two buttons on the bottom of a relative layout that is wrapped inside of a linear layout.
I am unable to get the view favorites button to be on top of the search button. There is a big space as you can see in this image:
Here is my code:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:text="#string/SearchRestaurantsCity"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/tvRestaurantSearchCity" />
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/etRestaurantSearchCity" />
<TextView
android:text="#string/SearchRestaurantsState"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/tvRestaurantSearchState" />
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/etRestaurantSearchState" />
<TextView
android:text="#string/SearchRestaurantsCategories"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/tvRestaurantSearchCategories" />
<Spinner
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/spRestaurantSearchCategories" />
<RelativeLayout
android:id="#+id/InnerRelativeLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentBottom="true">
<Button
android:text="#string/btnViewFavoriteRestaurants"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/btnViewFavoriteRestaurants"
style="#style/ButtonText"
android:padding="5dp"
android:layout_below="btnSearchRestaurants" />
<Button
android:text="#string/btnSearchRestaurants"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/btnSearchRestaurants"
style="#style/ButtonText"
android:layout_alignParentBottom="true"
android:padding="5dp" />
</RelativeLayout>

There are 2 things wrong with the XML.
For starters, you can't refer to the button btnSearchRestaurants before it's defined.
Secondly, you've defined btnSearchRestaurants to align-parent-bottom, and then tried to define that btnViewFavoriteRestaurants would be below that button. It should be above it (as per your description).

If you're trying to put the first button I can see inside RelativeLayout, I'd try to change the following line:
android:layout_below="btnSearchRestaurants" />
for this one:
android:layout_above="#+id/btnSearchRestaurants" />
Part of the space is reserved for all the elements of the layout I can see inside the LinearLayout,and the + is because the button btnSearchRestaurants is below so it is not created yet

I think the problem is at
android:layout_below="btnSearchRestaurants"
It should be
android:layout_below="#id/btnSearchRestaurants"

In your xml code I think you should correct this line
android:layout_below="btnSearchRestaurants"
as you want it to be above the Search Restaurants button it should be
android:layout_above="#id/btnSearchRestaurants"
I changed below to above for obvious reasons (you want it above the other button not below it) and added #id/ because you will be searching for the button id.