Schmidty850
Newbie
I'm going to preface this with I have searched everywhere to try to fix this and have searched the forums here too. I really just need some help to get it fixed.
Here's my code:
And here's my logcat:
With Home.java being:
Here's my code:
HTML:
package com.app.Studio17.learntocode;
import android.content.Intent;
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.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.RelativeLayout;
import java.util.ArrayList;
public class BaseActivity extends ActionBarActivity {
private DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
protected RelativeLayout _completeLayout, _activityLayout;
// nav drawer title
private CharSequence mDrawerTitle;
// used to store app title
private CharSequence mTitle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.drawer);
// // on first time display view for first nav item
if (savedInstanceState == null) {
displayView(0);
}
//initializations
mTitle = mDrawerTitle = getTitle();
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
// load titles and icons from strings.xml
String[] navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);
TypedArray navMenuIcons = getResources().obtainTypedArray(R.array.nav_drawer_icons);
ArrayList<NavDrawerItem> navDrawerItems = new ArrayList<NavDrawerItem>();
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, // nav menu toggle icon
R.string.drawer_open, // nav drawer open - description for
// accessibility
R.string.drawer_close // nav drawer close - description for
// accessibility
) {
public void onDrawerClosed(View view) {
super.onDrawerClosed(view);
getSupportActionBar().setTitle(mTitle);
invalidateOptionsMenu();
// calling onPrepareOptionsMenu() to show action bar icons
}
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
getSupportActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu();
// calling onPrepareOptionsMenu() to hide action bar icons
}
};
// adding nav drawer items
if(navMenuIcons ==null){
for(int i=0;i< navMenuTitles.length;i++){
navDrawerItems.add(new NavDrawerItem(navMenuTitles[i]));
}
}else{
for(int i=0;i< navMenuTitles.length;i++){
navDrawerItems.add(new NavDrawerItem(navMenuTitles[i],
navMenuIcons.getResourceId(i, -1)));
}
}
// setting the nav drawer list adapter
NavDrawerListAdapter adapter = new NavDrawerListAdapter(getApplicationContext(),
navDrawerItems);
mDrawerList.setAdapter(adapter);
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
// enabling action bar app icon and behaving it as toggle button
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
// getSupportActionBar().setIcon(R.drawable.ic_drawer);
mDrawerLayout.setDrawerListener(mDrawerToggle);
}
private class DrawerItemClickListener implements ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView parent, View view, int position,long id) {
// display view for selected nav drawer item
displayView(position);
}
}
/***
* 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
switch (position) {
case 0:
Intent intent = new Intent(this, Home.class);
startActivity(intent);
finish();
break;
case 1:
Intent intent1 = new Intent(this, TSquare.class);
startActivity(intent1);
finish();
break;
case 2:
Intent intent2 = new Intent(this, Buzzport.class);
startActivity(intent2);
finish();
break;
case 3:
Intent intent3 = new Intent(this, Bus.class);
startActivity(intent3);
finish();
break;
case 4:
Intent intent4 = new Intent(this, sting.class);
startActivity(intent4);
finish();
break;
default:
break;
}
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
mDrawerList.setSelection(position);
mDrawerLayout.closeDrawer(mDrawerList);
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getSupportActionBar().setTitle(mTitle);
}
@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 toggles
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
if (item.getItemId() == android.R.id.home) {
if (mDrawerLayout.isDrawerOpen(mDrawerList)) {
mDrawerLayout.closeDrawer(mDrawerList);
} else {
mDrawerLayout.openDrawer(mDrawerList);
}
}
return super.onOptionsItemSelected(item);
}
}And here's my logcat:
HTML:
07-22 21:58:11.823 1685-1685/com.app.Studio17.learntocode E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.app.Studio17.learntocode/com.app.Studio17.learntocode.Home}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.app.Studio17.learntocode.BaseActivity.displayView(BaseActivity.java:155)
at com.app.Studio17.learntocode.BaseActivity.onCreate(BaseActivity.java:36)
at com.app.Studio17.learntocode.Home.onCreate(Home.java:9)
at android.app.Activity.performCreate(Activity.java:5008)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
************at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
************at android.app.ActivityThread.access$600(ActivityThread.java:130)
************at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
************at android.os.Handler.dispatchMessage(Handler.java:99)
************at android.os.Looper.loop(Looper.java:137)
************at android.app.ActivityThread.main(ActivityThread.java:4745)
************at java.lang.reflect.Method.invokeNative(Native Method)
************at java.lang.reflect.Method.invoke(Method.java:511)
************at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
************at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
************at dalvik.system.NativeStart.main(Native Method)With Home.java being:
HTML:
package com.app.Studio17.learntocode;
import android.os.Bundle;
public class Home extends BaseActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
}
}