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Android application crashing, manifest issue

Heloo! I am creating an application in Android. I have declared all my activities in Android manifest, including the main one, and when i start it, it says that the activity i have selected as launcher does not exist:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.boacterapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="18" />
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="22" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="MainPage"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="AboutPage"
android:label="title_firskljt_activity">
</activity>
<activity
android:name="RecentSightingsPage"
android:label="title_first_activity">
</activity>
</application>
</manifest>
I have been stuck here for a while, so i'm kindly asking that you could help me identity if i have a problem in my manifest. Thank you in advance!

Make sure MainPage activity is in package "com.example.boacterapp".
Another option: replace short name:
android:theme="#style/AppTheme" >
<activity
android:name="MainPage" <----------------- short
android:label="#string/app_name" >
<intent-filter>
With long name that makes up the full class name of your activity:
android:theme="#style/AppTheme" >
<activity
android:name="com.bla.bla.MainPage" <------------- long
android:label="#string/app_name" >
<intent-filter>

Add "." (dot) before MainPage
as
android:name=".MainPage"
Same for others,so rewrite your manifest as
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.boacterapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="18" />
<uses-sdk
android:minSdkVersion="10"
android:targetSdkVersion="22" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainPage"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".AboutPage"
android:label="title_firskljt_activity">
</activity>
<activity
android:name=".RecentSightingsPage"
android:label="title_first_activity">
</activity>
</application>
</manifest>

<activity android:name="MainPage"
should be:
<activity android:name=".MainPage"
assuming that your MainPage activity is in the package com.example.boacterapp. If not, you need to provide the fully-qualified name of the MainPage app.

Activity name should have dot prefix, change activity name to .MainPage. Make sure it is inside com.example.boacterapp package

AndroidManifest.xml is getting corrupted when a new activity is created

When i create a new activity for my project, my new activity has errors, i think they are related to the androidmanifest.xml which get some weird lines at start and at end.
This are the lines that eclipse says that has errors
<<<<<<< Original
, >>>>>>> Added
And this is the entire androidmanifest.xml
<<<<<<< Original
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="moran.jonathan.pizzeria"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="moran.jonathan.pizzeria.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="moran.jonathan.pizzeria.Menu"
android:label="#string/title_activity_menu" >
</activity>
</application>
</manifest>
=======
<manifest xmlns:android="http://schemas.android.com/apk/res/android" >
<application>
<activity android:name=".Menu"
android:label="#string/title_activity_menu"
android:parentActivityName="moran.jonathan.pizzeria.MainActivity">
<meta-data android:name="android.support.PARENT_ACTIVITY"
android:value="moran.jonathan.pizzeria.MainActivity" />
</activity>
</application>
</manifest>
>>>>>>> Added
What could be happening?
Thanks in advance
EDIT WITH USEFUL INFO:
Never try to create an activity called Menu, as it seems to be some kind of reserved word and this is why this problem appears

This is because you have merged a conflicted file in git. Remove those lines and remove the repeat code and commit again:
<<<<<<< Original
// (1) this is your original Manifest code
=======
// (2) this is the new code.
>>>>>>> Added
NOTE: Either remove (1) or (2) depending on you need. and remove the extra lines

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="moran.jonathan.pizzeria"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="moran.jonathan.pizzeria.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="moran.jonathan.pizzeria.Menu"
android:label="#string/title_activity_menu" >
</activity>
</application>

Why is my Android app name same as the launcher activity name?

I understand that android:label= decides the name of the app.
I have done it properly as follows:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.drsystem"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" >
</uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" >
</uses-permission>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.drsystem.LoginActivity"
android:label="#string/title_activity_login" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.example.drsystem.CalibrationActivity"
android:label="#string/title_activity_calibration" >
</activity>
<activity
android:name="com.example.drsystem.DeadReckoningActivity"
android:label="#string/title_activity_dead_reckoning" >
</activity>
</application>
</manifest>
But my app name appears beneath the icon on the screen is still "#string/title_activity_login"
I want it to be "#string/app_name"
Anyone can help?
Thanks in advance

It's not really weird, but just good to know :
the Android's launcher use the Intent Launcher Label or if not set, the activity's label and finally application's label
<intent-filter android:label="#string/app_name">
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>

Naming my application in android
This is a bit weird in android...
App name is pretty much determined by first activity label.. or application label if it isn't set.

Just remove this line
android:label="#string/title_activity_login" from the Manifest file

Application name as first activity

I switched in manifest manually between activities because I made new activity that needed to be first. Everything works fine, but in the apps screen in my launcher where I see all apps below my app icon i see the name of the first activity "SplashScreen", but when I uninstall in or go to my apps I see that the name is OK.
My manifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.myapp"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="9"
android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.CALL_PHONE"/>
<application
android:hardwareAccelerated="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:largeHeap="true"
android:theme="#android:style/Theme.NoTitleBar" >
<activity
android:name="com.myapp.SplashScreen"
android:label="#string/title_activity_splash_screen"
android:screenOrientation="portrait" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.myapp.MainScreen"
android:label="#string/title_activity_main_screen"
android:screenOrientation="portrait" >
</activity>
<activity
android:name="com.myapp.Cameras"
android:label="#string/title_activity_cameras"
android:screenOrientation="portrait" >
</activity>
</application>

android:label="#string/title_activity_splash_screen"
that is the name being used.
you can just delete this line (and all the label from the other activities) and let all activities use the application name #string/app_name

<activity
android:name="com.myapp.SplashScreen"
android:label="#string/app_name"
android:screenOrientation="portrait" >
This should display the Application name

AndroidManifest.xml The markup in the document following the root element must be well formed

I have got Eclipse to generate a Basic android Hello World app, But it has 2 errors: first, in my AndroidManifest.xml on these two lines:
I get The markup in the document following the root element must be well formed, Also My R.java Will not generate, no matter how many times I clean my project. Any Answers?
the manifest is here: http://jsfiddle.net/NHDU6/
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jfkingsley.maclogin"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="15" />
<application
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
<!--
Declare the contents of this Android application. The namespace
attribute brings in the Android platform namespace, and the package
supplies a unique name for the application. When writing your
own application, the package name must be changed from "com.example.*"
to come from a domain that you own or have control over.
-->
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jfkingsley.maclogin" >
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.SET_WALLPAPER" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.EXPAND_STATUS_BAR" />
<application
android:icon="#drawable/ic_launcher_home"
android:label="#string/home_title" >
<activity
android:name="Home"
android:launchMode="singleInstance"
android:stateNotNeeded="true"
android:theme="#style/Theme" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.HOME" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name="Wallpaper"
android:icon="#drawable/bg_android_icon"
android:label="Wallpaper" >
<intent-filter>
<action android:name="android.intent.action.SET_WALLPAPER" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
Thanks, Jonathan

Here is your manifest,
You should not specify more than one Manifest and You should not specify more than one <application> tags.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jfkingsley.maclogin" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.GET_TASKS" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.SET_WALLPAPER" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.EXPAND_STATUS_BAR" />
<application
android:icon="#drawable/ic_launcher"
android:label="h" >
<activity
android:name=".MainActivity"
android:label="#string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="Home"
android:launchMode="singleInstance"
android:stateNotNeeded="true" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.HOME" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name="Wallpaper"
android:icon="#drawable/ic_launcher"
android:label="Wallpaper" >
<intent-filter>
<action android:name="android.intent.action.SET_WALLPAPER" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>

It may be that you are missing something, but sometimes doing a simple re-format of code: CTRL+SHIFT+F, clears the problem.

I looked at your manifest file. The error is caused because you have 2 declarations of <manifest /> tag.
It begins with:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jfkingsley.maclogin"
android:versionCode="1"
android:versionName="1.0" >
Then some comments follow and another declaration starts:
<!--
Declare the contents of this Android application. The namespace
attribute brings in the Android platform namespace, and the package
supplies a unique name for the application. When writing your
own application, the package name must be changed from "com.example.*"
to come from a domain that you own or have control over.
-->
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jfkingsley.maclogin" >
<uses-permission android:name="android.permission.CALL_PHONE" />
Your either forgot to comment one of the manifests tag, confused something, or following a wrong tutorial. The AndroidManifest file should have only one <manifest /> tag

The Auto-generated AndroidManifest.xml file has some problem by itself. There is two manifest tag and two uses-sdk tag inside it. That is the problem. Do as follows:
1- Delete the closing tag of first manifest tag which is:
</manifest>
2- Delete definition tag of the second manifest tag which is:
<manifest
xmlns:android="http://schemas.android.com/apk/res/android"
package="net.learn2develop.fragments"
android:versionCode="1"
android:versionName="1.0" >
3- If there is two uses-sdk tag, also delete the second uses-sdk tag.

I added a new activity to my app, and it gave this error after. The manifest disappeared from android-studio completely.
I had to edit the manifest with a text editor. It seems that when I added a new activity, Android Studio created a new tag then added the new activity tag inside in the manifest file, rather than just adding the tag with the new activity in the manifest.
After you update the manifest, the project worked fine.

<?xml version="1.0" encoding="utf-8"?>
< xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.groofy">
<activity
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme"/>
<activity
android:name=".MainActivity"
android:label="#string/title_activity_main"
android:theme="#style/AppTheme.NoActionBar"/>
<activity
android:name=".SignUp"
android:label="#string/title_activity_sign_up"
android:theme="#style/AppTheme.NoActionBar"/>
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>

/> should not be at the end of the file I had the same issue the error means the xml file is not correctly formatted you should try removing the / in front of the > or simply reformat