i have an arraylist of data ( bluetooth devices ) and i want to list those devices in a list,
For this i have made a customized view (item.xml) :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/images" />
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:layout_margin="10dip" />
</LinearLayout>
Composed of an imageview and a textview, so i can put the name of the device and a standard image int the list, here is the main.xml file :
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ProgressBar
android:id="#+id/progressBar1"
style="?android:attr/progressBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
the progress bar is for the scanning operation in the beginning of the activity.
any help would be appreciated, thank you
A listview can support different layouts(views) and can be built dynamically. This is done through a custom adapter.
you need listview to hold those data in the list. in your main layout i cant see any listview. after taking list view you need to define adapter for that listview and use this adapter in your listview.
Hope this will help you
Related
The main layout have four widgets- one EditText and three TextView as given below.
I want to add suggestion-list view dynamically as given below:
How to do it?
You can use AutoCompleteTextView. Described in http://developer.android.com/guide/topics/ui/controls/text.html.
Probably Custom adapter will help you to make two suggestions lists. Take a look at this Autocompletetextview with custom adapter and filter. I guess you need to create divider in custom adapter.
As described in comments. Just Make listview visible when you need to show suggestions. Or paste in eclipse and remove android:visibility="gone" attribute and you will see gray listview over textviews.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<EditText
android:id="#+id/search"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="#+id/tv_1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/search"
android:text="text1" />
<TextView
android:id="#+id/tv_2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/tv_1"
android:text="text2" />
<ListView
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_below="#id/search"
android:background="#android:color/darker_gray"
android:visibility="gone" />
</RelativeLayout>
There is a class already built into android which gives you think functionality.
It's called AutoCompleteTextView
Basically here is a mspaint demonstraiton of what I want to accomplish:
I do not want the outline to be visible to the user, it was just to give you an idea of what I want to do. I want new textviews to take position under each other whenever a new goal is added from the edittext-button combo on the bottom part of the GUI.
I know how to save the data - SQLite. But I have no idea how to make new textviews be on the bottom of the last one - and if there is no more room on the screen I want that textview part to be scrollable.
I don't know what I need to use to accomplish this.
Thanks in advance!
create two xml files.
One consisting of list view
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#drawable/bkgrnd_320x285">
<ListView
android:id="#+id/List1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:divider="#000000"
android:dividerHeight="1dp"
android:fastScrollEnabled="true"/>
</LinearLayout>
and another xml for just the textView eg. row.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/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Display Name"
android:textSize="20dp"
android:layout_marginTop="20dp" />
</LinearLayout>
Then in the main activity u need to refer to both the xml files as follows
ListView ll = (ListView) findViewById(R.id.List1);
ArrayAdapter arrayAdapter = new ArrayAdapter(this,R.layout.row,R.id.textView2, arraylist_you_want_to_display);
ll.setAdapter(arrayAdapter);
where R.layout.row is the row.xml consisting of textView
And R.id.textView2 is the id of the textView present in the row.xml
You may create a LinearLayout, setting the orientation to vertical.
Adding a ScrollView or ListView to show the upper part, with android:weight=1
Add the EditText to the LinearLayout, and this is done.
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ListView
android:id="#+id/List1"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:weight="1"/>
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
I'm developing and android application in which I have created a ListActivity which contains an ImageView and a TextView. There is also the ability to drag and drop those objects so that they can be moved. What I want to do now is to have a button at the bottom of the screen,not the list.
As the user scrolls the button will always stay there. I found this link but when i did what this link suggested no button did appear, and instead i got a huge blank space that takes over a quarter of the screen. Can anyone point me to the right direction?
ok so here is the .xml file that is set to the ListActivity
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<DragNDrop.DragNDropListView
android:id="#+id/android:list"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</DragNDrop.DragNDropListView>
</LinearLayout>
hopefully it can help
Your view should be like this:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<Button
android:id="#+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:text="Button"
android:layout_centerHorizontal="true"/>
<ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_above="#+id/btn"/>
</RelativeLayout>
Populate the listview with the data and see the button will be on its place though list being scrolled.
I think that ListActivity is a bad practice.
What you need to do is to is to change the Activity from ListActivity to Activity. In the layout file, do the following:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_contant"
android:orientation="horizontal">
<DragNDrop.DragNDropListView
android:id="#+id/android:list"
android:layout_width="fill_parent"
android:layout_height="wrap_contant">
</DragNDrop.DragNDropListView>
<Button
android:id="#+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"/>
</LinearLayout>
In on create you can get the list reference by doing:
ListView lv = (ListView)findViewById(R.id.list);
In order to make the button clickable, user OnClickListener
Im trying to manipulate the to do the following but its so far just lead to frustration... following is the poorly draw picture of what I am trying to accomplish:
http://i.stack.imgur.com/WZOta.png
http://i.stack.imgur.com/6cEQk.png
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center"
android:orientation="vertical" >
<ListView
android:id="#+id/android:list"
android:layout_width="wrap_content"
android:layout_height="419dp" >
</ListView>
<TextView
android:id="#+id/android:empty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/FAP001"
/>
<Button
android:id="#+id/button1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="+1" />
</LinearLayout>
</ScrollView>
Im not sure if the listview is the way to go.. heck im not even sure if linearlayout is a good call.. Im trying to have end result close to what is on the 2nd image.
THANKS IN ADVANCE!!!
You can't place an ListView within a ScrollView. Thats not possible. Because then the ListView has got two options to scroll trough the content, as you will. And this won't work.
For more Information:
https://groups.google.com/forum/m/?fromgroups#!topic/android-beginners/LRpLgGOy2Pc
If you want to have a ListView with 3 "sections" I would recommend you to create your own custom ListView with a Custom Adapter.
Here is a an Example of an custom ListView
http://www.androidhive.info/2012/02/android-custom-listview-with-image-and-text/
You can just take this ListView and just have to modify the Adapter and the Row XML to your own needs.
..i want to list different images..so
I dont fully understand your exact requirement. Anyways, you can use ListViews to make a list of images and textviews.
Assuming you want to have a ListView in which each row must contain an image and a text, you must define an xml inside /layout/ folder. Here is an example custom_row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dip"
/>
</LinearLayout>