Android ListView with onClick items

Question

I m a new programmer and new in Android  I m using this example http   www androidhive info 2012 09 android-adding-search-functionality-to-listview  and it works great    Now I want to make the items  Dell  Samsung Galaxy S3  etc  to call a function to open a new activity with different information each   For example   If I touch Dell  a new Activity has to show up showing me information about Dell  If I touch Samsung  the same thing   I Googled but couldn t find anything helpfull  any hint  I think this is basic  but I m new so I don t really know where to start

User · Answer

lv setOnItemClickListener new AdapterView OnItemClickListener          Override     public void onItemClick AdapterView lt   gt  parent  View view  int position  long id             Intent i   new Intent getActivity    DiscussAddValu class           startActivity i

User · Answer

You start new activities with intents   One method to send data to an intent is to pass a class that implements parcelable in the intent   Take note you are passing a copy of the class   http   developer android com reference android os Parcelable html    Here I have an onItemClick   I create intent and putExtra an entire class into the intent   The class I m sending has implemented parcelable   Tip   You only need implement the parseable over what is minimally needed to re-create the class   Ie maybe a filename or something simple like a string something that a constructor can use to create the class   The new activity can later getExtras and it is essentially creating a copy of the class with its constructor method   Here I launch the kmlreader class of my app when I recieve an onclick in the listview   Note  below summary is a list of the class that I am passing so get position  returns the class infact it is the same list that populates the listview  List lt KmlSummary gt  summary   null       public final static String EXTRA KMLSUMMARY    com gosylvester bestrides util KmlSummary          Override public void onItemClick AdapterView lt   gt  parent  View view  int position          long id        lastshownitem   position      Intent intent   new Intent context  KmlReader class       intent putExtra ImageTextListViewActivity EXTRA KMLSUMMARY              summary get position        startActivity intent       later in the new activity I pull out the parseable class with   kmlSummary   intent getExtras   getParcelable                  ImageTextListViewActivity EXTRA KMLSUMMARY      note    KmlSummary implements parcelable    there is a constructor method for parcel in    and a overridden writetoparcel method    these are really easy to setup   public KmlSummary Parcel in        this  id   in readInt        this  description   in readString        this  name   in readString        this set bounds in readDouble    in readDouble    in readDouble        in readDouble         this  resrawid   in readInt        this  resdrawableid   in readInt         this  pathstring   in readString        String s   in readString        this set isThumbCreated Boolean parseBoolean s        Override public void writeToParcel Parcel arg0  int arg1        arg0 writeInt this  id       arg0 writeString this  description       arg0 writeString this  name       arg0 writeDouble this get bounds   southwest latitude       arg0 writeDouble this get bounds   southwest longitude       arg0 writeDouble this get bounds   northeast latitude       arg0 writeDouble this get bounds   northeast longitude       arg0 writeInt this  resrawid       arg0 writeInt this  resdrawableid       arg0 writeString this get pathstring         String s   Boolean toString this isThumbCreated         arg0 writeString s       Good Luck Danny117

User · Answer

listview setOnItemClickListener new OnItemClickListener          Override     public void onItemClick AdapterView lt   gt adapter View v  int position       Intent intent      switch position         case 0          intent   new Intent Activity this firstActivity class           break        case 1          intent   new Intent Activity this secondActivity class           break       case 2          intent   new Intent Activity this thirdActivity class           break        add more if you have more items in listview      0 is the first item 1 second and so on              startActivity intent

User · Answer

In your activity  where you defined your listview  you write  listview setOnItemClickListener new OnItemClickListener            Override     public void onItemClick AdapterView lt   gt adapter View v  int position           ItemClicked item   adapter getItemAtPosition position            Intent intent   new Intent Activity this destinationActivity class             based on item add info to intent         startActivity intent               in your adapter s getItem you write  public ItemClicked getItem int position       return items get position

User · Answer

listview setOnItemClickListener new OnItemClickListener       setting onclick to items in the listview    Override public void onItemClick AdapterView lt   gt adapter View v  int position   Intent intent  switch position       case 0 is the first item in the listView     case 0      intent   new Intent Activity this firstActivity class       break    case 1 is the second item in the listView     case 1      intent   new Intent Activity this secondActivity class       break   case 2      intent   new Intent Activity this thirdActivity class       break    add more if you have more items in listView startActivity intent

User · Answer

You should definitely extend you ArrayListAdapter and implement this in your getView   method  The second parameter  a View  should be inflated if it s value is null  take advantage of it and set it an onClickListener   just after inflating   Suposing it s called your second getView   s parameter is called convertView   convertView setOnClickListener new View OnClickListener       public void onClick final View v        if  isSamsung          final Intent intent   new Intent this  SamsungInfo class         startActivity intent             else if                                 If you want some info on how to extend ArrayListAdapter  I recommend this link

User · Answer

well in your onitemClick you will send the selected value like deal    and send it in your intent when opening new activity and in your new activity get the sent data and related to selected item will display your data   to get the name from the list  String item   yourData get position  getName       to set data in intent   intent putExtra  Key   item     to get the data in second activity   getIntent   getExtras   getString  Key

User · Answer

for what kind of Hell implementing Parcelable     he is passing to adapter  String   so    get item String  at position  create intent  put it as extra  start activity  in activity get extra    to store product list you can use here HashMap   for example as STATIC object    example class describing product    public class Product       private String  name      private String  description      private int  id      public Product String name  String description int id             name   name           desctription   description           id   id             public String getName             return  name             public String getDescription             return  description           Product dell   new Product  dell   this is dell  1    HashMap lt String Product gt   hashMap   new HashMap lt  gt      hashMap put dell getName   dell     then u pass to adapter set of keys as   String   productNames     hashMap keySet   toArray new String  hashMap size        when in adapter u return view u set listener like this for example         Override  public View getView int position  View convertView  ViewGroup parent          Context context   parent getContext           String itemName   getItem position        someView setOnClikListener new MyOnClickListener context  itemName           private class MyOnClickListener implements View OnClickListener          private  String  itemName        private  Context  context       public MyOnClickListener Context context  String itemName              context   context            itemName   itemName                 Override       public void onClick View view               ------listener onClick example method body ------          Intent intent   new Intent  context  SomeClassToHandleData class            intent putExtra key to product name  itemName             context startActivity intent               then in other activity    Override  public void onCreate Bundle         String productName   getIntent   getExtra key to product name       Product product    hashMap get productName         key to product name is a public static String to serve as key for extra   ps  sorry for typo i was in hurry     ps2  this shoud give you a idea how to do it  ps3  when i will have more time i I ll add a detailed description  MY COMMENT    DO NOT USE ANY SWITCH STATEMENT DO NOT CREATE SEPARATE ACTIVITIES FOR EACH PRODUCT   U NEED ONLY ONE

User · Answer

I was able to go around the whole thing by replacing the context reference from this or Context this to getapplicationcontext

[android] Android ListView with onClick items

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