So, I am doing this project that includes an intro activity that switches to a menu activity with navigation drawer. Couple of days ago, I had an issue switching from intro to menu (Android Studio 1.0.2: java.lang.RuntimeException: Unable to start activity ComponentInfo: java.lang.NullPointerException) and it was solved by changing name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar" to name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar" thanks to goonerdroid's suggestion in my previous link. The issue that I have now is that I am trying to add a search action on the top right corner of the action bar alongside the navigation drawer so it can search on different future activities and javas that I will be adding. When I run the program, it enters the intro activity with no problems. When I click on the button to take me to the menuactivity, it displays the following error:
FATAL EXCEPTION: main
Process: com.wlodsgn.bunbunup, PID: 916
java.lang.NullPointerException
at com.wlodsgn.bunbunup.MenuActivity.onPrepareOptionsMenu(MenuActivity.java:181)
at android.app.Activity.onPreparePanel(Activity.java:2556)
at android.support.v4.app.FragmentActivity.onPrepareOptionsPanel(FragmentActivity.java:469)
at android.support.v7.app.ActionBarActivity.superOnPrepareOptionsPanel(ActionBarActivity.java:284)
at android.support.v7.app.ActionBarActivityDelegate.onPrepareOptionsPanel(ActionBarActivityDelegate.java:204)
at android.support.v7.app.ActionBarActivity.onPrepareOptionsPanel(ActionBarActivity.java:256)
at android.support.v4.app.FragmentActivity.onPreparePanel(FragmentActivity.java:458)
at android.support.v7.app.ActionBarActivity.superOnPreparePanel(ActionBarActivity.java:280)
at android.support.v7.app.ActionBarActivityDelegate$1.onPreparePanel(ActionBarActivityDelegate.java:84)
at android.support.v7.app.ActionBarActivityDelegateBase.preparePanel(ActionBarActivityDelegateBase.java:1006)
at android.support.v7.app.ActionBarActivityDelegateBase.doInvalidatePanelMenu(ActionBarActivityDelegateBase.java:1182)
at android.support.v7.app.ActionBarActivityDelegateBase.access$100(ActionBarActivityDelegateBase.java:79)
at android.support.v7.app.ActionBarActivityDelegateBase$1.run(ActionBarActivityDelegateBase.java:118)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Here is my updated MenuActivity.java:
import java.util.ArrayList;
import android.support.v4.view.MenuItemCompat;
import android.support.v4.view.MenuItemCompat.OnActionExpandListener;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.SearchView;
import android.support.v7.widget.SearchView.OnQueryTextListener;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.widget.DrawerLayout;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
/**
* Created by WiLo on 2/13/2015.
*/
public class MenuActivity extends ActionBarActivity implements OnQueryTextListener, OnActionExpandListener{
private TextView texto;
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
// nav drawer title
private CharSequence mDrawerTitle;
// used to store app title
private CharSequence mTitle;
// slide menu items
private String[] navMenuTitles;
private TypedArray navMenuIcons;
private ArrayList<NavDrawerItem> navDrawerItems;
private NavDrawerListAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_menu);
texto = (TextView) findViewById(R.id.texto);
mTitle = mDrawerTitle = getTitle();
// load slide menu items
navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
// nav drawer icons from resources
navMenuIcons = getResources()
.obtainTypedArray(R.array.nav_drawer_icons);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.list_slidermenu);
navDrawerItems = new ArrayList<NavDrawerItem>();
// agregar un nuevo item al menu deslizante
// Favoritos
navDrawerItems.add(new NavDrawerItem(navMenuTitles[0], navMenuIcons.getResourceId(0, -1)));
// Pedidos
navDrawerItems.add(new NavDrawerItem(navMenuTitles[1], navMenuIcons.getResourceId(1, -1)));
// Catologo
//navDrawerItems.add(new NavDrawerItem(navMenuTitles[2], navMenuIcons.getResourceId(2, -1), true, "Estrenos"));
// Contacto
//navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons.getResourceId(3, -1)));
// Recycle the typed array
navMenuIcons.recycle();
mDrawerList.setOnItemClickListener(new SlideMenuClickListener());
// setting the nav drawer list adapter
adapter = new NavDrawerListAdapter(getApplicationContext(),
navDrawerItems);
mDrawerList.setAdapter(adapter);
// enabling action bar app icon and behaving it as toggle button
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, //nav menu toggle icon
R.string.app_name, // nav drawer open - description for accessibility
R.string.app_name // nav drawer close - description for accessibility
) {
public void onDrawerClosed(View view) {
getSupportActionBar().setTitle(mTitle);
// calling onPrepareOptionsMenu() to show action bar icons
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getSupportActionBar().setTitle(mDrawerTitle);
// calling onPrepareOptionsMenu() to hide action bar icons
invalidateOptionsMenu();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
// on first time display view for first nav item
displayView(0);
}
}
@Override
public boolean onMenuItemActionExpand(MenuItem menuItem) {
Toast.makeText(getApplicationContext(), "Abriendo Busqueda", Toast.LENGTH_SHORT).show();
return true;
}
@Override
public boolean onMenuItemActionCollapse(MenuItem menuItem) {
Toast.makeText(getApplicationContext(), "Cerrando Busqueda", Toast.LENGTH_SHORT).show();
return true;
}
@Override
public boolean onQueryTextSubmit(String s) {
texto.setText("Buscando...\n\n" + s);
return false;
}
@Override
public boolean onQueryTextChange(String s) {
texto.setText("Que buscas? \n\n" + s);
return false;
}
/**
* Slide menu item click listener
* */
private class SlideMenuClickListener implements
ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// display view for selected nav drawer item
displayView(position);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu, menu);
MenuItem searchItem = menu.findItem(R.id.menu3_buscar);
SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
searchView.setOnQueryTextListener(this);
MenuItemCompat.setOnActionExpandListener(searchItem, this);
return super.onCreateOptionsMenu(menu);
}
/* *
* Called when invalidateOptionsMenu() is triggered
*/
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
// if nav drawer is opened, hide the action items
boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
return super.onPrepareOptionsMenu(menu);
}
/**
* Diplaying fragment view for selected nav drawer list item
* */
private void displayView(int position) {
// update the main content by replacing fragments
Fragment fragment = null;
switch (position) {
case 0:
fragment = new FmMenu();
break;
case 1:
fragment = new FmContacto();
break;
default:
break;
}
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).commit();
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
setTitle(navMenuTitles[position]);
mDrawerLayout.closeDrawer(mDrawerList);
} else {
// error in creating fragment
Log.e("BunBunUp", "MenuActivity - Error cuando se creo el fragment");
}
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getSupportActionBar().setTitle(mTitle);
}
/**
* When using the ActionBarDrawerToggle, you must call it during
* onPostCreate() and onConfigurationChanged()...
*/
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggls
mDrawerToggle.onConfigurationChanged(newConfig);
}
}
Also my styles.xml:
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat">
<!-- Customize your theme here. -->
</style>
</resources>
Updated IntroActivity.java
import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
/**
* Created by WiLo on 2/13/2015.
*/
public class IntroActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
/*getActionBar().hide();*/
setContentView(R.layout.activity_intro);
Log.i("BunBunUp", "MainActivity Created");
}
/**@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_intro, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}**/
public void startMenuActivity(View v){
Intent intent = new Intent(IntroActivity.this, MenuActivity.class);
startActivity(intent);
}
protected void onResume(){
super.onResume();
Log.i("BunBunUp", "IntroActivity Resumed");
}
protected void onPause(){
super.onPause();
Log.i("BunBunUp", "IntroActivity Paused");
}
protected void onStop(){
super.onStop();
Log.i("BunBunUp", "IntroActivity Stopped");
}
}
If you need debug or any other info, let me know. Any help would be appreciated.
