title: How do I show progress bar before showing activity
body: <p>Below is my java code and xml code.  I want to show progress bar before showing any data. How can I do that?  I'm using asyntask for loading data.  How will I show progressbar in my code to first show progressbar until data is loaded.  When data is loaded, the progress bar is removed.</p>
  
  <pre><code>public class fifthscreen extends Activity {
      String num = null;
      TextView ingredient;
  
  long Menu_ID;
  String dish_name;
  View row4;
  
  View row3;
  
  String status;
  
  HorizontalListView listview;
  CategoryListAdapter3 cla;
  String DescriptionAPI;
  
  TextView txt1, txt2, txt3;
  ImageView img1;
  String URL, URL2;
  String SelectMenuAPI;
  static ArrayList&lt;Long&gt; Category_ID = new ArrayList&lt;Long&gt;();
  static ArrayList&lt;String&gt; Category_name = new ArrayList&lt;String&gt;();
  static ArrayList&lt;String&gt; Category_image = new ArrayList&lt;String&gt;();
  public static String allergen2;
  private AQuery androidAQuery;
  String name;
  
  String description;
  String url1;
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.fifthscreen);
  
      ingredient = (TextView) findViewById(R.id.ingredient);
      img1 = (ImageView) findViewById(R.id.test_button_image);
  
      txt1 = (TextView) findViewById(R.id.menuname);
      txt3 = (TextView) findViewById(R.id.description);
  
      Intent iGet = getIntent();
  
      ImageView options = (ImageView) findViewById(R.id.options5);
      androidAQuery = new AQuery(this);
  
  
      options.setOnClickListener(new OnClickListener() {
          @Override
          public void onClick(View v) {
              Intent iMenuList = new Intent(fifthscreen.this,
                      LinkButtons.class);
              startActivity(iMenuList);
          }
      });
  
      dish_name = iGet.getStringExtra("dish_name");
  
      listview = (HorizontalListView) this.findViewById(R.id.listview2);
  
      cla = new CategoryListAdapter3(fifthscreen.this);
  
      new getDataTask().execute();
      ImageView btnback = (ImageView) findViewById(R.id.btnback);
  
      btnback.setOnClickListener(new OnClickListener() {
          @Override
          public void onClick(View v) {
              finish();
          }
      });
  }
  
  void clearData() {
      Category_ID.clear();
      Category_name.clear();
      Category_image.clear();
  }
  
  public class getDataTask extends AsyncTask&lt;Void, Void, Void&gt; {
  
      getDataTask() {
  
      }
  
      @Override
      protected void onPreExecute() {
          // TODO Auto-generated method stub
  
      }
  
      @Override
      protected Void doInBackground(Void... arg0) {
          // TODO Auto-generated method stub
          parseJSONData();
          return null;
      }
  
      @Override
      protected void onPostExecute(Void result) {
          // TODO Auto-generated method stub
          txt1.setText(name);
          txt3.setText(description);
          androidAQuery.id(img1).image(url1, false, false);
          listview.setAdapter(cla);
      }
  }
  
  public void parseJSONData() {
  
      SelectMenuAPI = Utils.dishdescription + dish_name;
  
      clearData();
      URL = SelectMenuAPI;
      URL2 = URL.replace(" ", "%20");
  
      try {
  
          HttpClient client = new DefaultHttpClient();
          HttpConnectionParams
                  .setConnectionTimeout(client.getParams(), 15000);
          HttpConnectionParams.setSoTimeout(client.getParams(), 15000);
          HttpUriRequest request = new HttpGet(URL2);
          HttpResponse response = client.execute(request);
          InputStream atomInputStream = response.getEntity().getContent();
          BufferedReader in = new BufferedReader(new InputStreamReader(
                  atomInputStream),8192);
  
          String line;
          String str = "";
          while ((line = in.readLine()) != null) {
              str += line;
          }
  
          JSONObject json2 = new JSONObject(str);
  
          status = json2.getString("status");
          if (status.equals("1")) {
  
              JSONArray school2 = json2.getJSONArray("data");
  
              for (int i = 0; i &lt; school2.length(); i++) {
  
                  name = school2.getJSONObject(0).getString("name");
  
                  description = school2.getJSONObject(0).getString(
                          "description");
  
                  url1 = school2.getJSONObject(0).getString("image");
              }
  
              JSONObject school3 = json2.getJSONObject("dish_nutrition");
  
  final TableLayout table = (TableLayout) findViewById(R.id.table2);
  
              for (int j = 0; j &lt; school3.length(); j++) {
  
                  String s = String.valueOf(j + 1);
  
      row3 = getLayoutInflater().inflate(R.layout.rows, null);
      ((TextView) row3.findViewById(R.id.localTime))
  
     .setText(school3.getJSONObject(s).getString("qty"));
  ((TextView) row3.findViewById(R.id.apprentTemp))
  
    .setText(school3.getJSONObject(s).getString("name"));
  
  
                  fifthscreen.this.runOnUiThread(new Runnable() {
                      public void run() {
                          table.addView(row3);
                      }
                  });
              }
  
              JSONArray school4 = json2.getJSONArray("dish_allergen");
              //
              for (int i = 0; i &lt; school4.length(); i++) {
                  JSONObject object = school4.getJSONObject(i);
  
                  Category_ID.add((long) i);
                  Category_name.add(object.getString("name"));
                  Category_image.add(object.getString("image"));
              }
  
              final LinearLayout table3 = (LinearLayout)  
      findViewById(R.id.table3);
  
              JSONArray school5 = json2.getJSONArray("dish_ingredient");
  
              for (int i = 0; i &lt; school5.length(); i++) {
  
  row4 = getLayoutInflater().inflate(R.layout.row2, null);
  ((TextView)  row4.findViewById(R.id.name)).setText(school5
  
        .getJSONObject(i).getString("name"));
                  ((TextView) row4.findViewById(R.id.subingredients))
                          .setText(school5.getJSONObject(i).getString(
                                  "sub_ingredients"));
  
                  // table3.addView(row2);
  
                  fifthscreen.this.runOnUiThread(new Runnable() {
                      public void run() {
                          table3.addView(row4);
                      }
                  });
              }
          }
  
          else {
  
              JSONArray school2 = json2.getJSONArray("data");
              for (int i = 0; i &lt; school2.length(); i++) {
                  JSONObject object = school2.getJSONObject(i);
  
                  Category_ID.add((long) i);
                  Category_name.add(object.getString("name"));
              }
          }
  
      } catch (MalformedURLException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
      } catch (IOException e) {
          // TODO Auto-generated catch block
      //   IOConnect = 1;
          e.printStackTrace();
      } catch (JSONException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
      }
  }
     }
  
  
  
    &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:background="#E5E5E5"
   android:orientation="vertical" &gt;
  
   &lt;LinearLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:orientation="vertical" &gt;
  
      &lt;LinearLayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:background="@drawable/layoutbordercolor" &gt;
  
          &lt;ImageView
              android:id="@+id/btnback"
              android:layout_width="0dp"
              android:layout_height="wrap_content"
              android:layout_weight="2"
              android:paddingLeft="3dp"
              android:paddingTop="15dp"
              android:src="@drawable/back"
              android:visibility="gone" /&gt;
  
          &lt;ImageView
              android:id="@+id/bitmap"
              android:layout_width="0dp"
              android:layout_height="wrap_content"
              android:layout_marginLeft="60dp"
              android:layout_weight="1.5"
              android:src="@drawable/logostar" /&gt;
  
          &lt;LinearLayout
              android:layout_width="0dp"
              android:layout_height="match_parent"
              android:layout_weight="4"
              android:orientation="vertical" &gt;
  
              &lt;TextView
                  android:id="@+id/textView1"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:paddingLeft="5dp"
                  android:paddingTop="12dp"
                  android:text="San Diego Unified"
                  android:textColor="#603311"
                  android:textSize="14sp"
                  android:textStyle="bold" /&gt;
  
              &lt;TextView
                  android:id="@+id/textView2"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:paddingLeft="8dp"
                  android:text="SCHOOL DISTRICT"
                  android:textColor="#603311"
                  android:textSize="10sp" /&gt;
          &lt;/LinearLayout&gt;
  
          &lt;ImageView
              android:id="@+id/options"
              android:layout_width="0dp"
              android:layout_height="wrap_content"
              android:layout_weight="2"
              android:paddingBottom="5dp"
              android:paddingTop="10dp"
              android:src="@drawable/options1" /&gt;
      &lt;/LinearLayout&gt;
    &lt;/LinearLayout&gt;
  
   &lt;LinearLayout
      android:id="@+id/lytContent"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_marginTop="20dp"
      android:orientation="vertical" &gt;
  
      &lt;RelativeLayout
          android:id="@+id/relativeLayout1"
          android:layout_width="match_parent"
          android:background="@drawable/editbackground"
          android:paddingBottom="5dp"
          android:layout_marginLeft="10dp"
          android:layout_marginRight="10dp"
          android:layout_height="wrap_content" &gt;
  
          &lt;ImageView
              android:id="@+id/imageView1"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_alignParentRight="true"
              android:layout_alignParentTop="true"
              android:paddingLeft="10dp"
              android:paddingRight="10dp"
              android:paddingTop="8dp"
              android:paddingBottom="2dp"
              android:src="@drawable/search_btn" /&gt;
  
          &lt;EditText
              android:id="@+id/editText2"
              android:layout_width="fill_parent"
              android:layout_height="36dp"
              android:layout_toLeftOf="@+id/imageView1"
             android:layout_marginTop="5dp"
             android:paddingLeft="10dp"
             android:layout_marginLeft="10dp"
             android:paddingRight="5dp"
             android:gravity="left"
              android:background="#FFF"
              android:hint="  Search School by name"
                android:imeOptions="actionSearch"
            android:paddingTop="10dp"
              android:textSize="15dp" &gt;
          &lt;/EditText&gt;
      &lt;/RelativeLayout&gt;
  
  
        &lt;LinearLayout
          android:id="@+id/lytContent"
          android:layout_width="fill_parent"
          android:layout_height="fill_parent"
  
          android:orientation="vertical" &gt;
  
      &lt;TextView
          android:id="@+id/pleaseselect"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_marginTop="10dp"
          android:paddingLeft="15dp"
          android:text=" Select a school type"
          android:textColor="#0A2A1B"
          android:textSize="18sp"
          android:textStyle="bold"
          android:visibility="gone" /&gt;
  
      &lt;LinearLayout
          android:id="@+id/lytContent"
          android:layout_width="fill_parent"
          android:layout_height="fill_parent"
  
          android:layout_marginTop="10dp"
      android:background="@drawable/layout_border"
          android:orientation="vertical" &gt;
  
          &lt;ListView
              android:id="@+id/listMainMenuhome"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent"
                android:paddingTop="3dp"
     android:paddingBottom="3dp"
     android:paddingLeft="3dp"
     android:paddingRight="3dp"
              android:dividerHeight="1dip"
              android:fadeScrollbars="true"
            android:listSelector="@color/listview_selector"
  
              android:visibility="gone" /&gt;
      &lt;/LinearLayout&gt;
  
      &lt;!--   android:listSelector="@drawable/listviewborder" --&gt;
  
  
      &lt;ProgressBar
          android:id="@+id/prgLoading"
          style="?android:attr/progressBarStyleLarge"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_gravity="center"
  
            /&gt;
  
      &lt;TextView
          android:id="@+id/txtAlert"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_centerInParent="true"
          android:paddingLeft="10dp"
          android:text="@string/alert"
          android:textColor="@color/text"
          android:textSize="14sp"
          android:visibility="gone" /&gt;
  
      &lt;/LinearLayout&gt;
  
    &lt;/LinearLayout&gt;
  
     &lt;/LinearLayout&gt;
  </code></pre>