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POHow to get Spinning Progress Bar at starting of Application
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  1. POHow to get Spinning Progress Bar at starting of Application
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    copied!<p>i am new in android. I managed to parse JSON file to my application. Now i want to use AsyncTask to get Spinning progressBa untill application starts and load data. I tried to read many things, but they only give how to get progressbar on onclick events or for downloading events. </p> <p>This is my code...</p> <p>I just confused about how to start progressbar at starting of your application and which part of following code goes to which method of asycTask class....</p> <pre><code>package com.demojson; import java.util.ArrayList; import java.util.HashMap; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.os.AsyncTask; import android.os.Bundle; import android.view.Gravity; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.TextView; import android.widget.Toast; import android.app.ListActivity; public class MainActivity extends ListActivity { private static String url = "http://timepasssms.com/webservices/ws.php?type=category"; private static final String TAG_DATA = "DATA"; private static final String TAG_0 = "0"; private static final String TAG_ID = "id"; private static final String TAG_1 = "1"; private static final String TAG_NAME = "name"; private static final String TAG_2 = "2"; private static final String TAG_DESCRIPTION = "description"; private static final String TAG_3 = "3"; private static final String TAG_NEW_NAME = "new_name"; private static final String TAG_4 = "4"; private static final String TAG_STATUS = "status"; JSONArray jArray = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ArrayList&lt;HashMap&lt;String, String&gt;&gt; contents = new ArrayList&lt;HashMap&lt;String, String&gt;&gt;(); JSONMethod metObj = new JSONMethod(); JSONObject jOb = metObj.getUrl(url); try { jArray = jOb.getJSONArray(TAG_DATA); for (int i = 0; i &lt; jArray.length(); i++) { JSONObject child = jArray.getJSONObject(i); String tag_0 = child.getString(TAG_0); String id = child.getString(TAG_ID); String tag_1 = child.getString(TAG_1); String name = child.getString(TAG_NAME); String tag_2 = child.getString(TAG_2); String description = child.getString(TAG_DESCRIPTION); String tag_3 = child.getString(TAG_3); String new_name = child.getString(TAG_NEW_NAME); String tag_4 = child.getString(TAG_4); String status = child.getString(TAG_STATUS); HashMap&lt;String, String&gt; map = new HashMap&lt;String, String&gt;(); map.put(TAG_NAME , name); contents.add(map); } } catch (JSONException e) { e.printStackTrace(); } ListAdapter adapter = new SimpleAdapter(this, contents, R.layout.list_items, new String[] { TAG_NAME }, new int[] { R.id.tvName }); setListAdapter(adapter); // --To get listview set...-- ListView lv = getListView(); lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) { String item = ((TextView)view.findViewById(R.id.tvName)).getText().toString(); Toast toast = Toast.makeText(getApplicationContext(), item , Toast.LENGTH_SHORT); toast.setGravity(Gravity.CENTER, 0, 0); toast.show(); } }); } } </code></pre> <p>and JSONMethod Class...</p> <pre><code>package com.demojson; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.json.JSONObject; import android.util.Log; public class JSONMethod { InputStream is = null; JSONObject jObj=null; String json = ""; public JSONObject getUrl(String url){ try{ DefaultHttpClient httpClient = new DefaultHttpClient(); HttpPost httpPost = new HttpPost(url); HttpResponse httpRespone = httpClient.execute(httpPost); HttpEntity httpEntity = httpRespone.getEntity(); is = httpEntity.getContent(); }catch(UnsupportedEncodingException ue){ }catch(ClientProtocolException ce){ }catch(IOException ie){ } try{ BufferedReader br = new BufferedReader(new InputStreamReader(is)); StringBuilder sb = new StringBuilder(); String line=null; while((line=br.readLine())!= null){ sb.append(line + "/n"); } is.close(); json = sb.toString(); }catch(Exception e){ Log.e("JSONMethod", "Error converting result" + e.toString()); } try{ jObj = new JSONObject(json); }catch(Exception e){ Log.e("JSONMethod", "Error parsing data" + e.toString()); } return jObj; } } </code></pre> <p>here is xml files... activity_main.xml</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="vertical"&gt; &lt;!-- Main ListView Always give id value as list(@android:id/list) --&gt; &lt;ImageView android:id="@+id/imageView1" android:layout_width="fill_parent" android:layout_height="60dp" android:src="@drawable/timepasssms" /&gt; &lt;ListView android:id="@android:id/list" android:layout_width="fill_parent" android:layout_gravity="center" android:layout_height="wrap_content"/&gt; &lt;/LinearLayout&gt; </code></pre> <p>and list_item.xml</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="match_parent" android:layout_height="match_parent" android:background="@drawable/round_edge" android:orientation="vertical" &gt; &lt;TextView android:id="@+id/tvName" android:layout_width="fill_parent" android:layout_height="45dp" android:layout_marginLeft="10dp" android:gravity="left" android:padding="5dp" android:textColor="#DF7401" android:textSize="20dp" /&gt; &lt;/LinearLayout&gt; </code></pre>
 

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