How to jump from ListView to next Activity

I am using this code to jump from ListView to selected class.

public class mainmenu extends Activity {
    private ListView lv1;
    private ArrayAdapter<String> listAdapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mainmenu);

        lv1 = (ListView) findViewById(R.id.options);
        String[] lv_arr = new String[]{"Book a Classified Ad", "Book a Classified display Ad", "Book a display Ad", "Page Position Availability", "MIS", "Market Share", "Approval", "Upload Material", "Exit"};
        ArrayList<String> Options = new ArrayList<String>();
        Options.addAll(Arrays.asList(lv_arr));
        listAdapter = new ArrayAdapter<String>(this, R.layout.simplerow, Options);
        lv1.setAdapter(listAdapter);
        lv1.setTextFilterEnabled(true);
        lv1.setClickable(true);

        lv1.setOnItemClickListener(new ListView.OnItemClickListener() {
            public void onItemClick(AdapterView<?> a, View v, int position, long id) {
                position = a.getSelectedItemPosition();
                a.setSelection(position);
                int pos1 = position;
                if (pos1 == 0) {
                    Intent intent = getIntent();
                    intent = new Intent(mainmenu.this, classifiedAd.class);
                    startActivity(intent);
                } else if (pos1 == 1 || pos1 == 2) {
                    Intent intent1 = new Intent(mainmenu.this, displayAd.class);
                    startActivity(intent1);
                } else if (pos1 == 3) {
                    Intent intent3 = new Intent(mainmenu.this, spaceAvail.class);
                    startActivity(intent3);
  开发者_如何学C              } else if (pos1 == 4) {
                    Intent intent4 = new Intent(mainmenu.this, mis.class);
                    startActivity(intent4);
                } else if (pos1 == 5) {
                    Intent intent5 = new Intent(mainmenu.this, mark.class);
                    startActivity(intent5);
                } else if (pos1 == 6) {
                    Intent intent6 = new Intent(mainmenu.this, approval.class);
                    startActivity(intent6);
                } else if (pos1 == 7) {
                    Intent intent7 = new Intent(mainmenu.this, uploadMat.class);
                    startActivity(intent7);
                } else if (pos1 == 8) {
                    finish();
                }
            }
        });
    }
}

where is the problem ?

Here is the working reference code you can use..

public class MainMenu extends ListActivity {
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            try {
                String[] opt = getResources().getStringArray(R.array.MainMenu);
                super.onCreate(savedInstanceState);
                setContentView(R.layout.mainmenu);

                ListView lv = getListView();
                ListAdapter la = new ArrayAdapter<String>(this,
                        android.R.layout.simple_list_item_1, opt);
                lv.setAdapter(la);
                lv.setTextFilterEnabled(true);
                lv.setChoiceMode(ListView.CHOICE_MODE_SINGLE);

                lv.setOnItemClickListener(new OnItemClickListener() {

                    public void onItemClick(AdapterView<?> parent, View view,
                            int position, long id) {

                        switch (position) {
                        case 0:
                            Intent firstIntent = new Intent(MainMenu.this,
                                    After1.class);
                            startActivity(firstIntent);
                            break;
                        case 1:
                            Intent secondIntent = new Intent(MainMenu.this,
                                    After2.class);
                            startActivity(secondIntent);
                            break;

                        default:
                            break;
                        }

                    }

                    @SuppressWarnings("unused")
                    public void onClick(View v) {
                        // TODO Auto-generated method stub

                    }
                });

            } catch (Exception e) {
            }

        } // END onCreate()
    }// END CLASS

instead of position i have to get the Label

Object GetLabel = lv1.getItemAtPosition(position);
if (GetLabel.toString().equals("Book a Classified Ad")) {

                     Intent intent = new Intent(mainmenu.this, classifiedAd.class);
                     startActivity(intent);                  
                    }

you need to get application context for intent

something like this,

          Intent intent = new Intent();
          intent.setClass(view.getContext(), ClassToNavigate.class);
          startActivity(intent);

String[] lv_arr= new String [] { "Book a Classified Ad" , "Book a Classified display Ad" , "Book a display Ad" , "Page Position Availability" , "MIS" , "Market Share" , "Approval" , "Upload Material", "Exit" }; 
Class[] desClass= new Class[] { classifiedAd.class , Other2.class , Other3.class , Other4.class , Other5.class , Other6.class , Other7.class , Other8.class, Other9.class }; 
ArrayList Options = new ArrayList();
Options.addAll(Arrays.asList(lv_arr)); 
listAdapter = new ArrayAdapter(this, R.layout.simplerow, Options);
lv1.setAdapter( listAdapter );
lv1.setOnItemClickListener(new  ListView.OnItemClickListener() {
@Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
          Intent intent = new Intent();
          Class activity = desClass[position];
          intent.setClass(mainmenu.this, activity);
          startActivity(intent);
    }
}

Please be careful of outOfindex error。

You can switch on an Activity by using an Intent. Intents are very useful in Android. It is also helpful for 'forwarding' some content from one Activity to another.