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POHow to select a particular item from the listview in android?
 

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  1. POHow to select a particular item from the listview in android?
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    <p>I have one list-view.It contains some data from the web-service by consuming it.</p> <p>Here my need is, if i click any item from that list-view, it wants to show data from the web service. have i to write any loop code for this?if so how?examples please. How to do this?</p> <p><strong>Logcat</strong></p> <pre><code>03-20 13:09:07.187: W/KeyCharacterMap(275): No keyboard for id 0 03-20 13:09:07.187: W/KeyCharacterMap(275): Using default keymap: /system/usr/keychars/qwerty.kcm.bin 03-20 13:09:13.116: I/System.out(275): Transparent 17170445 03-20 13:09:13.136: W/System.err(275): org.json.JSONException: Value Login of type java.lang.String cannot be converted to JSONArray 03-20 13:09:13.136: W/System.err(275): at org.json.JSON.typeMismatch(JSON.java:107) 03-20 13:09:13.136: W/System.err(275): at org.json.JSONArray.&lt;init&gt;(JSONArray.java:91) 03-20 13:09:13.136: W/System.err(275): at org.json.JSONArray.&lt;init&gt;(JSONArray.java:103) 03-20 13:09:13.136: W/System.err(275): at com.example.png.StationsListActivity.callService(StationsListActivity.java:115) 03-20 13:09:13.136: W/System.err(275): at com.example.png.StationsListActivity$4.run(StationsListActivity.java:103) 03-20 13:09:13.196: D/AndroidRuntime(275): Shutting down VM 03-20 13:09:13.196: W/dalvikvm(275): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 03-20 13:09:13.206: E/AndroidRuntime(275): FATAL EXCEPTION: main 03-2 0 13:09:13.206: E/AndroidRuntime(275): java.lang.NullPointerException 03-20 13:09:13.206: E/AndroidRuntime(275): at com.example.png.StationsListActivity$1.handleMessage(StationsListActivity.java:43) 03-20 13:09:13.206: E/AndroidRuntime(275): at android.os.Handler.dispatchMessage(Handler.java:99) 03-20 13:09:13.206: E/AndroidRuntime(275): at android.os.Looper.loop(Looper.java:123) 03-20 13:09:13.206: E/AndroidRuntime(275): at android.app.ActivityThread.main(ActivityThread.java:4627) 03-20 13:09:13.206: E/AndroidRuntime(275): at java.lang.reflect.Method.invokeNative(Native Method) 03-20 13:09:13.206: E/AndroidRuntime(275): at java.lang.reflect.Method.invoke(Method.java:521) 03-20 13:09:13.206: E/AndroidRuntime(275): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 03-20 13:09:13.206: E/AndroidRuntime(275): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 03-20 13:09:13.206: E/AndroidRuntime(275): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p><strong>StationsListActivity.java</strong></p> <pre><code>public class StationsListActivity extends Activity { TextView txt; String res_data; Button btn_info; ListView listView; ProgressDialog progressDialog; List&lt;Stations&gt; list; Handler handler =new Handler() { public void handleMessage(android.os.Message msg) { if(progressDialog.isShowing()) { progressDialog.cancel(); if(list.size() &gt; 0) { listView.setAdapter(new StationAdapter(StationsListActivity.this, android.R.id.text1,list)); } else { Toast.makeText(StationsListActivity.this, "List is Empty",Toast.LENGTH_LONG).show(); } } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.stations_list_layout); listView = (ListView)findViewById(R.id.listView_stations); Bundle extras=getIntent().getExtras(); if(extras!=null) { res_data =extras.getString("transfered_data"); } System.out.println("Transparent "+android.R.color.transparent); listView = (ListView) findViewById(R.id.listView_stations); btn_info = (Button)findViewById(R.id.btn_info); progressDialog = new ProgressDialog(StationsListActivity.this); progressDialog.setTitle("Loading"); progressDialog.setMessage("Please Wait"); btn_info.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intnt = new Intent(StationsListActivity.this , InformationsActivity.class); startActivity(intnt); } }); Thread thread =new Thread() { @Override public void run() { // TODO Auto-generated method stub callService(); handler.sendEmptyMessage(0); } }; thread.start(); progressDialog.show(); } public void callService() { // TODO Auto-generated method stub try { JSONArray array = new JSONArray(String.valueOf(res_data).replace("verifyUserResponse{return=", "").replace("; }", "")); list = new ArrayList&lt;Stations&gt;(); for (int i = 0; i &lt; array.length(); i++) { System.out.println(array.getJSONObject(i).get("1")+" == "+array.getJSONObject(i).get("0"));; Stations stations =new Stations(); stations.station_code = (String) array.getJSONObject(i).get("0"); stations.station_name = (String) array.getJSONObject(i).get("1"); list.add(stations); stations = null; } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } } </code></pre> <p><strong>StationAdaper.java</strong></p> <pre><code>public class StationAdapter extends ArrayAdapter&lt;Stations&gt; { Context context; List&lt;Stations&gt; list; public StationAdapter(Context context, int textViewResourceId, List&lt;Stations&gt; objects) { super(context, textViewResourceId, objects); this.context = context ; this.list = objects ; // TODO Auto-generated constructor stub } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View view = inflater.inflate(R.layout.station_child, null); TextView name = (TextView) view.findViewById(R.id.textView_single_item); ImageView img = (ImageView)view.findViewById(R.id.imageView1); Stations stations =list.get(position); name.setText(stations.station_name); return view; }} </code></pre> <p><strong>Stations.java</strong> public class Stations { </p> <pre><code>public String station_name =""; public String station_code =""; } </code></pre> <p><strong>station_child.xml</strong></p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="horizontal"&gt; &lt;RelativeLayout android:layout_width="fill_parent" android:layout_height="55dp" &gt; &lt;TextView android:id="@+id/textView_single_item" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:inputType="text" android:textColor="#ffffff" android:textStyle="normal" android:textAppearance="?android:attr/textAppearanceMedium" /&gt; &lt;ImageView android:id="@+id/imageView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_marginRight="10dp" android:background="@drawable/arrow"/&gt; &lt;/RelativeLayout&gt;&lt;/LinearLayout&gt; </code></pre> <p>suggestions please Thanks for your precious time!..</p>
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    1. USprabu
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      1. VTDownMod
    1. COplease show your adapter code to us and your `setOnItemClicked` Listener
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      1. POHow to select a particular item from the listview in android?
      1. USNezam
    2. COyou might want to look at http://www.androidhive.info/2011/10/android-listview-tutorial/
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      1. POHow to select a particular item from the listview in android?
      1. USngesh
    3. CO@Nezam please visit my question again, i've included my sources as per your demand
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      1. POHow to select a particular item from the listview in android?
      1. USprabu
 

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