Multi Level Json Parsing

I am writing multi level json parsing program, and able to get first level list, but not showing second level list while do tap on first level list item. In short, i am listing ca

Solution 1:

You need to pass the json array to another activity

Then

try
    {

        JSONArray jr = jb.getJSONArray("categories");
        for(int i=0;i<jr.length();i++)
        {
            JSONObject jb1 = jr.getJSONObject(i);
            JSONArray jr1 = jb1.getJSONArray("videos");
            for(int j=0;j<jr1.length();j++)
            {
                JSONObject jb2 = jr1.getJSONObject(j);
                String title =(String) jb2.get("title");
                String thumb = (String) jb2.getString("thumb");
                Log.i(".........",title);
                Log.i(".........",thumb);

            }
        }

    }
    catch(Exception e)
    {
        e.printStackTrace();
    }

The log

02-25 02:00:38.192: I/.........(1194): 2010 Day 1 Keynote
02-25 02:00:38.192: I/.........(1194): http://www.androidbegin.com/tutorial/flag/unitedstates.png
02-25 02:00:38.202: I/.........(1194): 2010 Day 2 Keynote
02-25 02:00:38.202: I/.........(1194): http://www.androidbegin.com/tutorial/flag/russia.png
02-25 02:00:38.202: I/.........(1194): Uploading your App
02-25 02:00:38.202: I/.........(1194): http://www.androidbegin.com/tutorial/flag/russia.png
02-25 02:00:38.202: I/.........(1194): Getting Started with Apps for the Chrome Web Store
02-25 02:00:38.212: I/.........(1194): http://www.androidbegin.com/tutorial/flag/unitedstates.png

Edit;

MainActivity.java

ListView lv = (ListView) findViewById(R.id.listView1);
    ArrayList<HashMap<String,String>> arraylist= newArrayList<HashMap<String,String>>();

          try {
                // Locate the array name in JSONJSONObject jb= newJSONObject("your json");
               jsonarray = jb.getJSONArray("categories");

                for (int i = 0; i < jsonarray.length(); i++) {
                    HashMap<String, String> map = newHashMap<String, String>();
                    JSONObject jsonobject = jsonarray.getJSONObject(i);
                    // Retrive JSON Objects
                    map.put("name", jsonobject.getString("name"));
                    map.put("thumb", jsonobject.getString("thumb"));
                    // Set the JSON Objects into the array
                    arraylist.add(map);
                }
            } catch (JSONException e) {
                Log.e("Error", e.getMessage());
                e.printStackTrace();
            }
          String[] from = { "name","thumb" };
          int[] to = { R.id.textView1,R.id.textView2 };
          ListAdapter adapter = newSimpleAdapter(this,arraylist,R.layout.njk,from,to);
          lv.setAdapter(adapter);
          lv.setOnItemClickListener(newOnItemClickListener()
          {
            @OverridepublicvoidonItemClick(AdapterView<?> arg0, View arg1,
                    int arg2, long arg3) {

                    JSONObject jb;
                    try {
                        Intent intent = newIntent(MainActivity.this,SecondActivity.class);
                        jb = jsonarray.getJSONObject(arg2);
                        intent.putExtra("key",jb.toString());
                        startActivity(intent);
                    } catch (JSONException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }



            }
          });

SecondActivity.java

publicclassSecondActivityextendsActivity {

    ListView lv;
    @OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        lv= (ListView) findViewById(R.id.listView1);
        ArrayList<HashMap<String,String>> arraylist= newArrayList<HashMap<String,String>>();
        try
        {
        String value = getIntent().getStringExtra("key");

        JSONObject jb =  newJSONObject(value);
        JSONArray jr = jb.getJSONArray("videos");
        for(int j=0;j<jr.length();j++)
        {
            HashMap<String,String> map = newHashMap<String,String>(); 
            JSONObject jb2 = jr.getJSONObject(j);
            String title =(String) jb2.get("title");
            String thumb = (String) jb2.getString("thumb");
            map.put("title",title);
            map.put("thumb",thumb);
            Log.i(".........",title);
            Log.i(".........",thumb);
            arraylist.add(map);

        }
        }catch(Exception e)
        {
            e.printStackTrace();
        }
         String[] from = { "title","thumb" };
         int[] to = { R.id.textView1,R.id.textView2 };
         ListAdapter adapter = newSimpleAdapter(this,arraylist,R.layout.njk,from,to);
         lv.setAdapter(adapter);
    }

njk.xml

<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent" ><TextViewandroid:id="@+id/textView2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignLeft="@+id/textView1"android:layout_below="@+id/textView1"android:layout_marginTop="26dp"android:text="TextView" /><TextViewandroid:id="@+id/textView1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentLeft="true"android:layout_alignParentTop="true"android:layout_marginTop="28dp"android:text="TextView" /></RelativeLayout>

activity_main.xml

<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity" ><ListViewandroid:id="@+id/listView1"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_alignParentLeft="true"android:layout_alignParentTop="true" ></ListView></RelativeLayout>

activity_second.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".SecondActivity" >

    <ListView
        android:id="@+id/listView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true" >
    </ListView>

</RelativeLayout>

Snaps