We-Pad: Could it be Android's iPad Killer ?

Recently a german based company showed a new product: We-Pad (instead of iPad).<br />it's the same concept of iPad but runs on Android OS and Supports Flash.<br /><br />see more details <a href="http://www.nowpublic.com/tech-biz/ipad-killer-we-pad-e-reader-google-android-tablet-video-photos-2604433.html">here</a>

Recently a german based company showed a new product: We-Pad (instead of iPad).it's the same concept of iPad but runs on Android OS and Supports Flash.see more details here…

Android Date and Time Controls

The Date-Time Controls in Android enable the user to pick date and time values and store them anywhere.<br />The date and time controls include:<br />1. DatePicker<br />2. Time Picker.<br />3. DatePickerDialog.<br />4. TimePickerDialog.<br />5. AnalogClock.<br />6. DigitalClock.<br />7. chronometer<br /><br /><span style="font-size: large;">DatePicker:</span><br /><br />The DatePicker control enables the user to select a value of date only.<br /><pre class="brush:xml"><?xml version="1.0" encoding="utf-8"?><br /><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:orientation="vertical"<br /> android:layout_width="fill_parent"<br /> android:layout_height="fill_parent"<br /> ><br /><TextView <br /> android:layout_width="fill_parent" <br /> android:layout_height="wrap_content" <br /> android:id="@+id/txt"<br /> /><br /> <DatePicker<br /> android:layout_width="fill_parent" <br /> android:layout_height="wrap_content" <br /> android:id="@+id/datePick"<br /> /><br /> <Button<br /> android:layout_width="wrap_content" <br /> android:layout_height="wrap_content" <br /> android:id="@+id/btn"<br /> android:text="Select Date"<br /> /><br /></LinearLayout><br /><br /><br /></pre><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Date%20Time%20Controls/DateTimeControls1.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Date%20Time%20Controls/DateTimeControls1.JPG" width="222" wt="true" /></a></div><pre class="brush:java">final DatePicker dp=(DatePicker)findViewById(R.id.datePick);<br /> Button btn=(Button)findViewById(R.id.btn);<br /> btn.setOnClickListener(new OnClickListener()<br /> {<br /><br /> public void onClick(View arg0) {<br /> // TODO Auto-generated method stub<br /> <br /> TextView txt=(TextView)findViewById(R.id.txt);<br /> txt.setText("You selected "+dp.getDayOfMonth()+"/"+(dp.getMonth()+1)+"/"+dp.getYear());<br /> }<br /> <br /> }<br /> <br /> );<br /><br /></pre>Notice that we add 1 to the value of <span style="color: blue;">DatePicker.getMonth()</span> because the months range is from 0 to 11.<br /><br />If you want to set an initial selected date for the DatePicker you can use:<br /><span style="color: blue;">DatePicker.init(year, monthOfYear, dayOfMonth, onDateChangedListener);</span><br /><br />If you want to capture the date as the date changes in the control you can make the activity implements the <span style="color: blue;">OnDateChangedListener</span> interface and implements the <span style="color: blue;">onDateChanged</span> method<br /><pre class="brush:java">Calendar cal=Calendar.getInstance(Locale.ENGLISH);<br /> dp.init(cal.getTime().getYear()+1900, cal.getTime().getMonth(), cal.getTime().getDay(), this);<br /><br />then<br /><br />public void onDateChanged(DatePicker view, int year, int monthOfYear,<br /> int dayOfMonth) {<br /> // TODO Auto-generated method stub<br /> TextView txt=(TextView)findViewById(R.id.txt);<br /> txt.setText("You selected "+view.getDayOfMonth()+"/"+(view.getMonth()+1)+"/"+view.getYear());<br /> }<br /><br /></pre><br /><span style="font-size: large;">TimePicker:</span><br /><span style="color: blue;">TimePicker</span> is like <span style="color: blue;">DatePicker</span> but it displays time instead of date, here’s how it looks like:<br /><pre class="brush:xml"><?xml version="1.0" encoding="utf-8"?><br /><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:orientation="vertical"<br /> android:layout_width="fill_parent"<br /> android:layout_height="fill_parent"<br /> ><br /><TextView <br /> android:layout_width="fill_parent" <br /> android:layout_height="wrap_content" <br /> android:id="@+id/txt"<br /> /><br /> <TimePicker<br /> android:layout_width="fill_parent" <br /> android:layout_height="wrap_content" <br /> android:id="@+id/TimePick"<br /> /><br /> <Button<br /> android:layout_width="wrap_content" <br /> android:layout_height="wrap_content" <br /> android:id="@+id/btn"<br /> android:text="Select Date"<br /> /><br /></LinearLayout><br /><br /><br /></pre><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Date%20Time%20Controls/DateTimeControls2.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Date%20Time%20Controls/DateTimeControls2.JPG" width="222" wt="true" /></a></div><pre class="brush:java">final TimePicker tp=(TimePicker)findViewById(R.id.TimePick);<br /> Button btn=(Button)findViewById(R.id.btn);<br /> btn.setOnClickListener(new OnClickListener()<br /> {<br /><br /> public void onClick(View arg0) {<br /> // TODO Auto-generated method stub<br /> <br /> TextView txt=(TextView)findViewById(R.id.txt);<br /> txt.setText("You selected "+tp.getCurrentHour()+":"+tp.getCurrentMinute());<br /><br /></pre>Notice that by default the time picker displays the time in AM/PM format. If you want it to display time in 24-hours format you can use<br /><strong>TimePicker.setIs24HourView(boolen is24HourView);</strong><br />If you want to initialize the timepicker with a certain time you can use the methods:<br /><br /><pre>TimePicker.setCurrentHour(int Hour);</pre><pre>TimePicker.setCurrentMinute(int Minute);</pre><br />You can implement the <span style="color: blue;">OnTimeChangedListener</span> so that you capture any change in the time picker:<br /><pre class="brush:java">final TimePicker tp=(TimePicker)findViewById(R.id.TimePick);<br /> tp.setCurrentHour(10);<br /> tp.setCurrentMinute(45);<br /> <br /> tp.setOnTimeChangedListener(new OnTimeChangedListener()<br /> {<br /><br /> public void onTimeChanged(TimePicker arg0, int arg1, int arg2) {<br /> // TODO Auto-generated method stub<br /> TextView txt=(TextView)findViewById(R.id.txt);<br /> txt.setText("You selected "+arg0.getCurrentHour()+":"+arg0.getCurrentMinute());<br /> }<br /> <br /> }<br /> );<br /><br /></pre>We checked so far the <span style="color: blue;">DatePicker</span> and <span style="color: blue;">TimePicker</span> widgets, but they take big space on the screen so Android provides similar controls but with different look: the <span style="color: blue;">DatePickerDialog</span> and <span style="color: blue;">TimePickerDialog</span>.<br /><br />These widgets act the same as DatePicker and TimePicker but the appear as dialogs or popups instead of occupying a space on the screen<br /><br /><span style="font-size: large;">DatePickerDialog</span><br />DatePickerDialog is not a View, that you can’t define it in the xml layout file.<br />Instead you declare it from code with the following two constructors:<br /><pre class="brush:java">DatePickerDialog(Context context, DatePickerDialog.OnDateSetListener callBack, int year, int monthOfYear, int dayOfMonth);<br />DatePickerDialog(Context context, int theme, DatePickerDialog.OnDateSetListener callBack, int year, int monthOfYear, int dayOfMonth);<br /><br /></pre>You can use it like this:<br /><pre class="brush:java">public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> setContentView(R.layout.main);<br /> Button btn=(Button)findViewById(R.id.btn);<br /><br />final OnDateSetListener odsl=new OnDateSetListener()<br /> {<br /><br /> public void onDateSet(DatePicker arg0, int year, int month, int dayOfMonth) {<br /> // TODO Auto-generated method stub<br /> TextView txt=(TextView)findViewById(R.id.txt);<br /> txt.setText("The date is "+dayOfMonth+"/"+month+"/"+year);<br /> }<br /> <br /> };<br /><br />btn.setOnClickListener(new OnClickListener()<br /> {<br /><br /> public void onClick(View arg0) {<br /> // TODO Auto-generated method stub<br /> <br /> <br /> Calendar cal=Calendar.getInstance();<br /> DatePickerDialog datePickDiag=new DatePickerDialog(DateTimeControls.this,odsl,cal.get(Calendar.YEAR),cal.get(Calendar.MONTH),cal.get(Calendar.DAY_OF_MONTH));<br /> datePickDiag.show();<br /> }<br /> <br /> }<br /> <br /> );<br /><br />}<br /><br /></pre><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Date%20Time%20Controls/DateTimeControls3.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Date%20Time%20Controls/DateTimeControls3.JPG" width="227" wt="true" /></a></div>To take an action when the date is set you define an <span style="color: blue;">OnDateSelectedListner </span>and implement the <span style="color: blue;">onDateSet </span>method<br /><br /><span style="font-size: large;">TimePickerDialog</span><br /><br />DatePickerDialog is similar to DatePickerDialog but used for setting time.<br />The constructors for TimePickerDialog are:<br /><pre class="brush:java">TimePickerDialog(Context context, TimePickerDialog.OnTimeSetListener callBack, int hourOfDay, int minute, boolean is24HourView);<br /><br />TimePickerDialog(Context context, int theme, TimePickerDialog.OnTimeSetListener callBack, int hourOfDay, int minute, boolean is24HourView);<br /><br /><br /></pre>You can use it like this:<br /><pre class="brush:java">public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> setContentView(R.layout.main);<br /> Button btn=(Button)findViewById(R.id.btn);<br />}<br /><br />final OnTimeSetListener otsl=new OnTimeSetListener()<br /> {<br /><br /> public void onTimeSet(TimePicker arg0, int hourOfDay, int minute) {<br /> // TODO Auto-generated method stub<br /> TextView txt=(TextView)findViewById(R.id.txt);<br /> txt.setText("The time is "+hourOfDay+":"+minute);<br /> }<br /> };<br /><br />btn.setOnClickListener(new OnClickListener()<br /> {<br /><br /> public void onClick(View arg0) {<br /> // TODO Auto-generated method stub<br /> <br /> <br /> Calendar cal=Calendar.getInstance();<br /> TimePickerDialog timePickDiag=new TimePickerDialog(DateTimeControls.this,otsl,cal.get(Calendar.HOUR_OF_DAY),cal.get(Calendar.MINUTE),true);<br /> timePickDiag.show();<br /> }<br /> <br /> }<br /> <br /> );<br /><br /></pre><br /><br /><br /><span style="color: black; font-size: large;">AnalogClock</span><br /><br />If you want to display time as in a clock you can use the AnalogClock widget. It just displays the time with no ability to edit the time.<br /><pre class="brush:xml"><?xml version="1.0" encoding="utf-8"?><br /><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:orientation="vertical"<br /> android:layout_width="fill_parent"<br /> android:layout_height="fill_parent"<br /> ><br /><TextView <br /> android:layout_width="fill_parent" <br /> android:layout_height="wrap_content" <br /> android:id="@+id/txt"<br /> /><br /> <br /> <AnalogClock <br /> android:layout_width="wrap_content" <br /> android:layout_height="wrap_content" <br /> android:id="@+id/clock"<br /> /><br /> <br /> <br /></LinearLayout><br /><br /><br /></pre><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Date%20Time%20Controls/DateTimeControls4.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Date%20Time%20Controls/DateTimeControls4.JPG" width="224" wt="true" /></a></div><br /><br /><br /><span style="font-size: large;">DigitalClock</span><br />Same as AnalogClock but displays a digital clock<br /><pre class="brush:xml"><?xml version="1.0" encoding="utf-8"?><br /><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:orientation="vertical"<br /> android:layout_width="fill_parent"<br /> android:layout_height="fill_parent"<br /> ><br /><TextView <br /> android:layout_width="fill_parent" <br /> android:layout_height="wrap_content" <br /> android:id="@+id/txt"<br /> /><br /> <br /> <DigitalClock <br /> android:layout_width="wrap_content" <br /> android:layout_height="wrap_content" <br /> android:id="@+id/digitalClock"<br /> /><br /> <br /> <br /></LinearLayout><br /><br /><br /></pre><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Date%20Time%20Controls/DateTimeControls5.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Date%20Time%20Controls/DateTimeControls5.JPG" width="224" wt="true" /></a></div><br /><br /><span style="font-size: large;">ChronoMeter:</span><br /><br />The ChronoMeter acts like a timer. It has a starting point and an endpoint and you can calculate the time elapsed between these two points.

The Date-Time Controls in Android enable the user to pick date and time values and store them anywhere.The date and time controls include:1. DatePicker2. Time Picker.3. DatePickerDialog.4. TimePickerDialog.5. AnalogClock.6. DigitalClock.7. chronomete…

Intel Running Android on Atom Chips

Hi all <br />Check this <a href="http://technorati.com/technology/android/article/intel-running-android-on-atom-chips/">article</a> found on Technorati.<br /><br />I believe it's a step towards the right direction for Android.

Hi all Check this article found on Technorati.I believe it's a step towards the right direction for Android.…

Selection Controls 3: CheckBox and RadioButton

<span style="font-size: large;">CheckBox:</span><br /><br />The check box has two states: Checked and UnChecked. It inherits from TextView so it has all of its properties:<br /><pre class="brush:xml"><?xml version="1.0" encoding="utf-8"?><br /><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:orientation="vertical"<br /> android:layout_width="fill_parent"<br /> android:layout_height="fill_parent"<br /> ><br /> <TextView<br /> android:layout_width="fill_parent" <br /> android:layout_height="wrap_content"<br /> android:id="@+id/txt"<br /> /><br /> <CheckBox<br /> android:layout_width="fill_parent" <br /> android:layout_height="wrap_content"<br /> android:id="@+id/Chk"<br /> android:text="This is a check box"<br /> android:checked="false"<br /> <br /> /><br /></LinearLayout><br /><br /><br /></pre><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls7.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls7.JPG" width="225" wt="true" /></a></div>and to handle the check/uncheck event:<br /><pre class="brush:java">CheckBox chk=(CheckBox)findViewById(R.id.Chk);<br /> chk.setOnCheckedChangeListener(new OnCheckedChangeListener()<br /> {<br /><br /> public void onCheckedChanged(CompoundButton arg0, boolean arg1) {<br /> TextView txt=(TextView)findViewById(R.id.txt);<br /> if (arg1)<br /> txt.setText("checked");<br /> else<br /> txt.setText("Unchecked");<br /> <br /> }<br /> <br /> }<br /> );<br /><br /></pre><br /><span style="font-size: large;">RadioButton:</span><br />Android provides Radio button control. You create a <span style="color: blue;">RadioGroup</span> and add <span style="color: blue;">RadioButtons</span> inside it.<br /><pre class="brush:xml"><?xml version="1.0" encoding="utf-8"?><br /><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:orientation="vertical"<br /> android:layout_width="fill_parent"<br /> android:layout_height="fill_parent"<br /> ><br /> <TextView<br /> android:id="@+id/txt"<br /> android:layout_width="fill_parent"<br />android:layout_height="fill_parent"<br /> /><br /> <RadioGroup<br /> android:id="@+id/group"<br />android:layout_width="fill_parent"<br />android:layout_height="fill_parent"<br />android:text="Radio Group"<br />><br /><RadioButton android:id="@+id/item1"<br />android:layout_width="wrap_content"<br />android:layout_height="wrap_content"<br />android:text="Item1"<br />android:checked="true"<br /> /><br /><RadioButton android:id="@+id/item2"<br />android:layout_width="wrap_content"<br />android:layout_height="wrap_content"<br />android:text="Item2" /><br /><RadioButton android:id="@+id/item3"<br />android:layout_width="wrap_content"<br />android:layout_height="wrap_content"<br />android:text="Item3" /><br /></RadioGroup><br /></LinearLayout><br /><br /><br /></pre><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls8.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls8.JPG" width="224" wt="true" /></a></div><br />You can get the checked item from code like this:<br /><pre class="brush:java">RadioGroup rg=(RadioGroup)findViewById(R.id.group);<br /> rg.setOnCheckedChangeListener(new android.widget.RadioGroup.OnCheckedChangeListener()<br /> {<br /><br /> public void onCheckedChanged(RadioGroup arg0, int arg1) {<br /> // TODO Auto-generated method stub<br /> TextView txt=(TextView)findViewById(R.id.txt);<br /> RadioButton rb=(RadioButton)findViewById(arg1);<br /> txt.setText("You selected "+rb.getText());<br /> <br /> }<br /> <br /> }<br /> );<br /><br /></pre>

CheckBox:The check box has two states: Checked and UnChecked. It inherits from TextView so it has all of its properties: android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > androi…

Selection Controls 2: The spinner Control

The spinner controls is similar to the ComboBox in C#. it displays a list to select from in a popup window so ot may become a better choice over ListView if you want to save space.<br /><br />It works in a similar way to that of the the listView<br /><pre class="brush:xml"><?xml version="1.0" encoding="utf-8"?><br /><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:orientation="vertical"<br /> android:layout_width="fill_parent"<br /> android:layout_height="fill_parent"<br /> ><br /> <Spinner<br /> android:layout_width="fill_parent" <br /> android:layout_height="wrap_content"<br /> android:id="@+id/Spinner"<br /> /><br /></LinearLayout><br /><br /><br /></pre><br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls5.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls5.JPG" width="223" wt="true" /></a></div>when you click on the spinner it popups like this:<br /><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls6.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls6.JPG" width="226" wt="true" /></a></div>To handle the selected item you can use do it like this:<br /><pre class="brush:java">final String [] items=new String[]{"Item1","Item2","Item3","Item4"};<br /> ArrayAdapter<string> ad=new ArrayAdapter<string>(this,android.R.layout.simple_spinner_item,items);<br /> ad.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);<br /> Spinner spin=(Spinner)findViewById(R.id.Spinner);<br /> spin.setAdapter(ad);<br /> spin.setOnItemSelectedListener(new OnItemSelectedListener()<br /> {<br /><br /> public void onItemSelected(AdapterView arg0, View arg1,<br /> int arg2, long arg3) {<br /> TextView txt=(TextView)findViewById(R.id.txt);<br /> TextView temp=(TextView)arg1;<br /> txt.setText(temp.getText());<br /> <br /> }<br /><br /> public void onNothingSelected(AdapterView arg0) {<br /> // TODO Auto-generated method stub<br /> <br /> }<br /> <br /> });<br /><br /></pre>The above code displays the selected item text in the textview.<br /><br />The parameters of the OnItemClick method are:<br /><br /><br />• <span style="color: blue;">Arg0</span>:the Spinner, notice that it is of type AdapterView.<br /><br />• <span style="color: blue;">Arg1</span>: the view that represents the selected item, in this example it will be a TextView<br /><br />• <span style="color: blue;">Arg2</span>: the position of the selected item.<br /><br />• <span style="color: blue;">Arg3:</span> the id of the selected item.<br /><br />and that's it for the Spinner Control.

The spinner controls is similar to the ComboBox in C#. it displays a list to select from in a popup window so ot may become a better choice over ListView if you want to save space.It works in a similar way to that of the the listView android:orien…

Android Selection Controls

Android offers selection Controls like<br /><br /><br />1. List View.<br /><br />2. Spinner<br /><br />3. Check box<br /><br />4. Radio Button<br /><br /><span style="font-size: large;">The List View:</span> <br /><br /><br />ListView represents a list of items that can be selected. It is similar to the ListBox in C#.<br /><pre class="brush:xml"><?xml version="1.0" encoding="utf-8"?><br /><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:orientation="vertical"<br /> android:layout_width="fill_parent"<br /> android:layout_height="fill_parent"<br /> ><br /><TextView <br /> android:layout_width="fill_parent" <br /> android:layout_height="wrap_content" <br /> android:id="@+id/txt"<br /> /><br /> <ListView<br /> android:layout_width="wrap_content" <br /> android:layout_height="wrap_content"<br /> android:id="@+id/List"<br /> /><br /></LinearLayout><br /><br /><br /></pre><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls1.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls1.JPG" width="221" wt="true" /></a></div>To populate the list and handle the <span style="color: blue;">ItemClick</span> event we can do it like this :<br /><pre class="brush:java">final String [] items=new String[]{"Item1","Item2","Item3","Item4"};<br /> ArrayAdapter<string> ad=new ArrayAdapter<string>(this,android.R.layout.simple_list_item_1,items);<br /> list=(ListView)findViewById(R.id.List);<br /> list.setAdapter(ad);<br />list.setOnItemClickListener(new OnItemClickListener()<br /> {<br /><br /> public void onItemClick(AdapterView arg0, View arg1, int arg2,<br /> long arg3) {<br /> // TODO Auto-generated method stub<br /> TextView txt=(TextView)findViewById(R.id.txt);<br /> txt.setText(list.getItemAtPosition(arg2).toString());<br /> <br /> <br /> }<br /> <br /> }<br /> );<br /><br /></pre>The above code displays the selected item text in the textview:<br />The parameters of the OnItemClick method are:<br /><br /><br />• <span style="color: blue;">Arg0</span>:the listview, notice that it is of type AdapterView.<br /><br />• <span style="color: blue;">Arg1</span>: the view that represents the selected item, in this example it will be a TextView<br /><br />• <span style="color: blue;">Arg2:</span> the position of the selected item.<br /><br />• <span style="color: blue;">Arg3:</span> the id of the selected item.<br /><br />When creating the adapter you can specify the layout of the list by using <span style="color: blue;">simple_list_item_1</span> to display a simple list or by using <br /><br /><br /><span style="color: blue;">simple_list_item_single_choice</span> to display radio buttons for single selection<br /><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls3.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls3.JPG" width="223" wt="true" /></a></div><br />Or by using <span style="color: blue;">simple_list_item_multiple_choice</span> to display check boxes for multiple selection<br /><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls4.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls4.JPG" width="220" wt="true" /></a></div>You can set the choice mode of the list by using <span style="color: blue;">setchoicemode()</span> method:<br /><pre class="brush:java">public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> //setContentView(R.layout.main);<br /> final String [] items=new String[]{"Item1","Item2","Item3","Item4"};<br /> ArrayAdapter<string> ad=new ArrayAdapter<string>(this,android.R.layout.simple_list_item_multiple_choice,items);<br /> setListAdapter(ad);<br /> ListView list=getListView();<br /> list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);<br /> <br /> }<br /><br /></pre>Now suppose you want to change the text of the an item when it is clicked, you can do it like this:<br /><pre class="brush:java">list.setOnItemClickListener(new OnItemClickListener()<br /> {<br /><br /> public void onItemClick(AdapterView arg0, View arg1, int arg2,<br /> long arg3) {<br /> // TODO Auto-generated method stub<br /> TextView txt=(TextView)findViewById(R.id.txt);<br /> items[arg2]="changed";<br /> list.setAdapter(new ArrayAdapter<string>(ListControls.this,android.R.layout.simple_list_item_1,items));<br /> <br /> }<br /> <br /> }<br /> );<br /><br /></pre>Or a more neat way:<br /><pre class="brush:java">list.setOnItemClickListener(new OnItemClickListener()<br /> {<br /><br /> public void onItemClick(AdapterView arg0, View arg1, int arg2,<br /> long arg3) {<br /> // TODO Auto-generated method stub<br /> TextView temp=(TextView)arg1;<br /> temp.setText("changed 2");<br /> }<br /> <br /> }<br /> );<br /><br /></pre>See that you actually change the value of the string array item at the selected position then bind the listview with the adapter again. Or you capture the View object and do what you want.<br /><br /><br /><br />If the activity will contain just one <span style="color: blue;">listview</span> you can create an activity that extends list view. In this case you don’t have to specify a layout as a listview will fill the screen.<br /><pre class="brush:java">public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> final String [] items=new String[]{"Item1","Item2","Item3","Item4"};<br /> ArrayAdapter<string> ad=new ArrayAdapter<string>(this,android.R.layout.simple_list_item_1,items);<br /> setListAdapter(ad);<br /><br /></pre><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls1.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls1.JPG" width="221" wt="true" /></a></div>If you want to reference or customize this listview then you can define it in the layouts xml fine by assigning it the id <span style="color: blue;">“android:id/list”</span> so that the activity knows which listView is the main list for the activity .<br /><br />This example shows a <span style="color: blue;">listview</span> and a <span style="color: blue;">textview</span><br /><pre class="brush:xml"><?xml version="1.0" encoding="utf-8"?><br /><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:orientation="vertical"<br /> android:layout_width="fill_parent"<br /> android:layout_height="fill_parent"<br /> ><br /><TextView <br /> android:layout_width="fill_parent" <br /> android:layout_height="wrap_content" <br /> android:id="@+id/txt"<br /> android:text="List View Demo"<br /> /><br /> <br /> <ListView<br /> android:layout_width="fill_parent" <br /> android:layout_height="wrap_content"<br /> android:id="@android:id/list"<br /> /><br /></LinearLayout><br /><br /><br /></pre><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls2.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="http://dl.dropbox.com/u/2624328/Android%20Pro/2010/April/Selection%20Controls/List%20Controls2.JPG" width="226" wt="true" /></a></div>Now if you want to customize the ui of each row of the listview you define two layouts files: the first has the layout of the activity and the other has layout of each row in the listview

Android offers selection Controls like1. List View.2. Spinner3. Check box4. Radio ButtonThe List View: ListView represents a list of items that can be selected. It is similar to the ListBox in C#. android:orientation="vertical" android:layout_w…