OnItemClickListener navigation box

Question

I am making an application with an example of Android developers with a navigation box. I made items, but I don’t know how I can discover a new activity from each credited item.

This is MainActivity:

public class MainActivity extends Activity { private DrawerLayout mDrawerLayout; private ListView mDrawerList; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mDrawerTitle; private CharSequence mTitle; private String[] mGalaxyTitles; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mTitle = mDrawerTitle = getTitle(); mGalaxyTitles = getResources().getStringArray(R.array.Galaxys_array); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (ListView) findViewById(R.id.left_drawer); mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); mDrawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_list_item, mGalaxyTitles)); mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setHomeButtonEnabled(true); mDrawerToggle = new ActionBarDrawerToggle( this, mDrawerLayout, R.drawable.ic_drawer, R.string.drawer_open, R.string.drawer_close ) { public void onDrawerClosed(View view) { getActionBar().setTitle(mTitle); invalidateOptionsMenu(); } public void onDrawerOpened(View drawerView) { getActionBar().setTitle(mDrawerTitle); invalidateOptionsMenu(); } }; mDrawerLayout.setDrawerListener(mDrawerToggle); if (savedInstanceState == null) { selectItem(0); } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.main, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onPrepareOptionsMenu(Menu menu) { boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList); menu.findItem(R.id.action_websearch).setVisible(!drawerOpen); return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (mDrawerToggle.onOptionsItemSelected(item)) { return true; } switch(item.getItemId()) { case R.id.action_websearch: Intent intent = new Intent(Intent.ACTION_WEB_SEARCH); intent.putExtra(SearchManager.QUERY, getActionBar().getTitle()); if (intent.resolveActivity(getPackageManager()) != null) { startActivity(intent); } else { Toast.makeText(this, R.string.app_not_available, Toast.LENGTH_LONG).show(); } return true; default: return super.onOptionsItemSelected(item); } } private class DrawerItemClickListener implements ListView.OnItemClickListener { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub } } public void onItemClick(AdapterView<?> parent, View view, int position, long id) { switch(position) { case 1: Intent a = new Intent(MainActivity.this, Page1.class); startActivity(a); break; case 2: Intent b = new Intent(MainActivity.this, Page2.class); startActivity(b); break; default: } } private void selectItem(int position) { Fragment fragment = new GalaxyFragment(); Bundle args = new Bundle(); args.putInt(GalaxyFragment.ARG_Galaxy_NUMBER, position); fragment.setArguments(args); FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit(); mDrawerList.setItemChecked(position, true); setTitle(mGalaxyTitles[position]); mDrawerLayout.closeDrawer(mDrawerList); } @Override public void setTitle(CharSequence title) { mTitle = title; getActionBar().setTitle(mTitle); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); mDrawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); mDrawerToggle.onConfigurationChanged(newConfig); } public static class GalaxyFragment extends Fragment { public static final String ARG_Galaxy_NUMBER = "Galaxy_number"; public GalaxyFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_Galaxy, container, false); int i = getArguments().getInt(ARG_Galaxy_NUMBER); String Galaxy = getResources().getStringArray(R.array.Galaxys_array)[i]; int imageId = getResources().getIdentifier(Galaxy.toLowerCase(Locale.getDefault()), "drawable", getActivity().getPackageName()); ((ImageView) rootView.findViewById(R.id.image)).setImageResource(imageId); getActivity().setTitle(Galaxy); return rootView; } } } 

And Drawer List.xml

 <TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/text1" android:textIsSelectable="false" android:layout_width="match_parent" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceListItemSmall" android:gravity="center_vertical" android:paddingLeft="16dp" android:paddingRight="16dp" android:textColor="#fff" android:background="?android:attr/activatedBackgroundIndicator" android:minHeight="?android:attr/listPreferredItemHeightSmall"/> 

Clicking on the elements does not cause other actions, what is the error?

Answer 1

Instead of your code:

 private void selectItem(int position) { Fragment fragment = new GalaxyFragment(); Bundle args = new Bundle(); args.putInt(GalaxyFragment.ARG_Galaxy_NUMBER, position); fragment.setArguments(args); FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit(); mDrawerList.setItemChecked(position, true); setTitle(mGalaxyTitles[position]); mDrawerLayout.closeDrawer(mDrawerList); } 

Use this code:

 private void selectItem(int position) { switch(position) { case 1: Intent a = new Intent(MainActivity.this, Activity1.class); startActivity(a); break; case 2: Intent b = new Intent(MainActivity.this, Activity2.class); startActivity(b); break; default: } } 

And delete this part: (This is not necessary)

 public void onItemClick(AdapterView<?> parent, View view, int position, long id) { switch(position) { case 1: Intent a = new Intent(MainActivity.this, Page1.class); startActivity(a); break; case 2: Intent b = new Intent(MainActivity.this, Page2.class); startActivity(b); break; default: } } 

Answer 2

Instead of using Activities, just use the fragment and the fragment manager to navigate between them.

Answer 3

 switch(position) { case 1: Intent a = new Intent(Book.this, SecondActivity.class); startActivity(a); break; case 2: Intent b = new Intent(Book.this, ThirdActivity.class); startActivity(b); break; default: } 

Answer 4

In the manifest, you write this code:

 <activity android:name=".firstactivity" android:parentActivityName=".MainActivity"> <meta-data android:name="android.support.PARENT_ACTIVITY" android:value=".MainActivity"/> </activity> 

In the main activity:

 Intent i=new Intent(MainActivity.this,firstactivity.class); startActivity(i);