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App stopped working as soon as i clicked the button

I built a simple project that squares a given number. In that app as soon as i click the button "Calculate" it say's "Unfortunately, SquareCalculator has stopped". What should i do to resolve the problem?
Below is my entire code:-
MainActivity.java
package thenerdimite.squarecalculator;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
protected void calculate (View v){
EditText input = (EditText) findViewById(R.id.etInput);
TextView output = (TextView) findViewById(R.id.tvOutput);
int base = Integer.valueOf(input.getText().toString());
int result = base * base;
String formattedResult = String.format("%,d", result);
output.setText("Result: " + formattedResult);
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="thenerdimite.squarecalculator.MainActivity">
<EditText
android:id="#+id/etInput"
android:layout_width="245dp"
android:layout_height="41dp"
android:layout_marginTop="15dp"
android:ems="10"
android:inputType="number"
tools:layout_editor_absoluteX="16dp"
tools:layout_editor_absoluteY="62dp"
android:layout_below="#+id/tvInput"
android:layout_alignStart="#+id/tvInput" />
<Button
android:id="#+id/btnCalculate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignStart="#+id/etInput"
android:layout_below="#+id/etInput"
android:layout_marginTop="20dp"
android:onClick="Calculate"
android:text="Calculate"
android:textSize="18sp" />
<TextView
android:id="#+id/tvOutput"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Result:"
android:textAppearance="#style/TextAppearance.AppCompat.Display1"
android:layout_below="#+id/btnCalculate"
android:layout_alignStart="#+id/btnCalculate"
android:layout_marginTop="18dp" />
<TextView
android:id="#+id/tvInput"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Enter an Integer:"
android:textAppearance="#style/TextAppearance.AppCompat.Display1"
android:layout_marginStart="19dp"
android:layout_alignParentTop="true"
android:layout_alignParentStart="true" />
</RelativeLayout>
logcat
04-25 09:28:05.060 3596-3596/thenerdimite.squarecalculator D/AndroidRuntime: Shutting down VM
04-25 09:28:05.060 3596-3596/thenerdimite.squarecalculator W/dalvikvm: threadid=1: thread exiting with uncaught exception (group=0xa5007678)
04-25 09:28:05.060 3596-3596/thenerdimite.squarecalculator E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.IllegalStateException: Could not find method Calculate(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatButton with id 'btnCalculate'
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:327)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:284)
at android.view.View.performClick(View.java:4240)
at android.view.View$PerformClick.run(View.java:17721)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
04-25 09:28:06.740 3596-3596/? I/Process: Sending signal. PID: 3596 SIG: 9
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="thenerdimite.squarecalculator">
<application
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">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

Using the documentation of Button
You see the method need to be public and accept a View
In order for this to work, the method must be public and accept a View as its only parameter.
So it should be
public void Calculate (View v){
Using the xml notation, of course, you should call it calculate and correct the XML

From what I see, the problem is that your button action is android:onClick="Calculate" but should be android:onClick="calculate"

you need to make the method public, protected and private methods are not accessible by xml.
public void calculate (View v){
EditText input = (EditText) findViewById(R.id.etInput);
TextView output = (TextView) findViewById(R.id.tvOutput);
int base = Integer.valueOf(input.getText().toString());
int result = base * base;
String formattedResult = String.format("%,d", result);
output.setText("Result: " + formattedResult);
}

Change android:onClick="Calculate" to android:onClick="calculate".
Also calculate method should be public.

In XML you have "Calculate" with capital "C" while method is called "calculate". Change XML and it should work.
https://developer.android.com/reference/android/widget/Button.html

My Android application runs on emulator but not working on my android device

My application works fine on android emulator. When I'm trying to run it on my device LogCat column gives me info that there is no such columns: USERNAME.
On emulator my SQLite database is created normally and I can add new users and sign but in device there is an exception when I'm trying doing this.
Here is a Log file when i'm trying to create new user:
02-14 17:29:07.997: D/BubblePopupHelper(9620): isShowingBubblePopup : false
02-14 17:30:07.617: E/SQLiteLog(10274): (1) no such column: USERNAME
02-14 17:30:07.627: D/AndroidRuntime(10274): Shutting down VM
02-14 17:30:07.627: E/AndroidRuntime(10274): FATAL EXCEPTION: main
02-14 17:30:07.627: E/AndroidRuntime(10274): Process: com.example.naukamagisterka, PID: 10274
02-14 17:30:07.627: E/AndroidRuntime(10274): android.database.sqlite.SQLiteException: no such column: USERNAME (code 1): , while compiling: SELECT * FROM USERS WHERE USERNAME=?
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:897)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:508)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:726)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1426)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1273)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1144)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1312)
02-14 17:30:07.627: E/AndroidRuntime(10274): at com.example.naukamagisterka.LoginDataBaseAdapter.getSingleEntryUsers(LoginDataBaseAdapter.java:81)
02-14 17:30:07.627: E/AndroidRuntime(10274): at com.example.naukamagisterka.SignUPActivity$1.onClick(SignUPActivity.java:44)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.view.View.performClick(View.java:4764)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.view.View$PerformClick.run(View.java:19844)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.os.Handler.handleCallback(Handler.java:739)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.os.Handler.dispatchMessage(Handler.java:95)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.os.Looper.loop(Looper.java:135)
02-14 17:30:07.627: E/AndroidRuntime(10274): at android.app.ActivityThread.main(ActivityThread.java:5376)
02-14 17:30:07.627: E/AndroidRuntime(10274): at java.lang.reflect.Method.invoke(Native Method)
02-14 17:30:07.627: E/AndroidRuntime(10274): at java.lang.reflect.Method.invoke(Method.java:372)
02-14 17:30:07.627: E/AndroidRuntime(10274): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
02-14 17:30:07.627: E/AndroidRuntime(10274): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.naukamagisterka"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="17"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".ActivityLogin"
android:label="#string/title_activity_activity_login" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".SignUPActivity"
android:label="#string/title_activity_sign_up" >
</activity>
<activity
android:name=".HomeAfterLogin"
android:label="#string/title_activity_home_after_login" >
</activity>
</application>
</manifest>
ActivityLogin.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:gravity="center_vertical|center_horizontal"
android:orientation="vertical" android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin" tools:context=".LoginActivity"
android:background="#0099CC"
android:descendantFocusability="beforeDescendants"
android:focusableInTouchMode="true">
<LinearLayout
android:id="#+id/ll1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center_vertical|center_horizontal">
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/logo" />
</LinearLayout>
<LinearLayout
android:id="#+id/ll2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center_vertical|center_horizontal">
<ProgressBar android:id="#+id/login_progress" style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:visibility="gone" />
<ScrollView android:id="#+id/login_form" android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:id="#+id/email_login_form"
android:layout_width="match_parent"
android:layout_height="254dp"
android:orientation="vertical" >
<AutoCompleteTextView android:id="#+id/email" android:layout_width="match_parent"
android:layout_height="wrap_content" android:hint="#string/prompt_email"
android:inputType="textEmailAddress" android:maxLines="1"
android:singleLine="true"
android:layout_marginBottom="10dp"
android:textColorHint="#ffffffff"
android:textColor="#ffffffff" />
<EditText android:id="#+id/password" android:layout_width="match_parent"
android:layout_height="wrap_content" android:hint="#string/prompt_password"
android:imeActionLabel="#string/action_sign_in"
android:imeOptions="actionUnspecified" android:inputType="textPassword"
android:maxLines="1" android:singleLine="true"
android:layout_marginBottom="10dp"
android:textColorHint="#ffffffff"
android:textColor="#ffffffff" />
<Button
android:id="#+id/email_sign_in_button"
style="?android:textAppearanceSmall"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:background="#66CCFF"
android:text="#string/action_sign_in"
android:textColor="#ffffffff"
android:textStyle="bold" />
</LinearLayout>
</LinearLayout>
</ScrollView>
</LinearLayout>
<LinearLayout
android:id="#+id/ll3"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="bottom|center_horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/sign_up"
android:id="#+id/signUpTextView"
android:autoLink="web"
android:textColor="#ffffffff" />
</LinearLayout>
</LinearLayout>
ActivityLogin.java
package com.example.naukamagisterka;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.text.method.DialerKeyListener;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class ActivityLogin extends Activity {
Button btnLogin;
TextView btnSingIn;
LoginDataBaseAdapter loginDataBaseAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
loginDataBaseAdapter = new LoginDataBaseAdapter(this);
loginDataBaseAdapter=loginDataBaseAdapter.open();
btnLogin = (Button)findViewById(R.id.email_sign_in_button);
btnSingIn = (TextView)findViewById(R.id.signUpTextView);
final EditText editTextEmail = (EditText)findViewById(R.id.email);
final EditText editTextPassword = (EditText)findViewById(R.id.password);
btnSingIn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intentSignIn = new Intent(getApplicationContext(), SignUPActivity.class);
startActivity(intentSignIn);
}
});
btnLogin.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//try {
final String userName = editTextEmail.getText().toString();
final String userPassword = editTextPassword.getText().toString();
String storedPassword = loginDataBaseAdapter.getSingleEntry(userName);
if (storedPassword.equals(userPassword)){
Toast.makeText(ActivityLogin.this, "Udana próba zalogowania.", Toast.LENGTH_LONG).show();
setContentView(R.layout.activity_home_after_login);
}
else{
Toast.makeText(ActivityLogin.this, "Niepoprawny e-mail lub hasło! Spróbuj ponownie.", Toast.LENGTH_LONG).show();
}
} //catch (Exception e) {
//
//}
});
}
#Override
protected void onDestroy() {
super.onDestroy();
loginDataBaseAdapter.close();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_login, 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();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
LoginDataBaseAdapter.java
package com.example.naukamagisterka;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.widget.Toast;
public class LoginDataBaseAdapter {
static final String DATABASE_NAME = "WylaczSwiatloDB";
static final int DATABASE_VERSION=1;
public static final int NAME_COULMN=1;
public String Email;
public String Password;
public int Points;
LoginDataBaseAdapter loginDataBaseAdapter;
static final String DATABASE_CREATE = "CREATE TABLE "+"USERS"+"(USERNAME VARCHAR, PASSWORD VARCHAR, POINTS INT)"+";"+"";
public SQLiteDatabase db;
private final Context context;
private DataBaseHelper dbHelper;
public LoginDataBaseAdapter(Context _context){
context=_context;
dbHelper = new DataBaseHelper(context, DATABASE_NAME, null, DATABASE_VERSION);
}
public LoginDataBaseAdapter open() throws SQLException{
db=dbHelper.getWritableDatabase();
return this;
}
public void close(){
db.close();
}
public SQLiteDatabase getDatabaseInstance(){
return db;
}
public void insertEntry(String userName, String password){
ContentValues newValues = new ContentValues();
newValues.put("USERNAME", userName);
newValues.put("PASSWORD", password);
newValues.put("POINTS", 0);
db.insert("USERS", null, newValues);
}
public int deleteEntry(String UserName){
String where = "USERNAME=?";
int numberOFEntriesDeleted = db.delete("USERS", where, new String[]{UserName});
return numberOFEntriesDeleted;
}
public String getSingleEntry(String userName){
Cursor cursor = db.query("USERS", null, "USERNAME=?", new String[]{userName},null,null,null);
if (cursor.getCount()<1) //Nie ma username
{
cursor.close();
return "NOT EXIST";
}
else{
cursor.moveToFirst();
String password = cursor.getString(cursor.getColumnIndex("PASSWORD"));
cursor.close();
return password;
}
}
public String getSingleEntryUsers(String userName){
Cursor cursor = db.query("USERS", null, " USERNAME=?", new String[]{userName},null,null,null);
if (cursor.getCount()<1) //Nie ma username
{
cursor.close();
return "NOT EXIST";
}
else{
cursor.moveToFirst();
String user = cursor.getString(cursor.getColumnIndex("USERNAME"));
cursor.close();
return user;
}
}
public void updateEntry(String userName, String password){
ContentValues updateValues = new ContentValues();
updateValues.put("USERNAME", userName);
updateValues.put("PASSWORD", password);
updateValues.put("POINTS", 0);
String where = "USERNAME=?";
db.update("USERS", updateValues, where, new String[]{userName});
//String storedUsers = loginDataBaseAdapter.getSingleEntry(userName);
}
public void displayToast(String value){
Toast.makeText(context, value, Toast.LENGTH_LONG).show();
}
}
Anyone could help?

You may have changed the DB schema without increasing DATABASE_VERSION and thus the new app is finding the old DB.
static final int DATABASE_VERSION=2;
should fix it.

Try to uninstall Application on device and rerun it.

Error with facebook activity in android studio

I'm trying to develop basic facebook activty and The app will get username and display it in screen but I'm facing a kind of FATAL EXCEPTION: main error I have provided my complete set of codes starting with manifest file, class file, xml file and the Logcat error,your help is highly required
The below provided code is my manifest file
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.world.trialwithmugaputhagam">
<uses-permission android:name="android.permission.INTERNET" />
<application
android:name=".MyApplicatioon"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<meta-data
android:name="com.facebook.sdk.ApplicationId"
android:value="#string/app_id" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.facebook.FacebookActivity"
android:configChanges="keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:label="#string/app_name"
android:theme="#android:style/Theme.Translucent.NoTitleBar" />
<activity android:name=".MainFragment" />
</application>
The below code is the class file I have used.In below code I have also assigned mTextDetails but when I hover the cursor it say the value is not assigned
import android.os.Bundle;
import android.app.Fragment;
import android.content.Intent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.facebook.AccessToken;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.Profile;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;
public class MainActivity extends Fragment {
private TextView mTextDetails;
private CallbackManager mcallbackManager;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getActivity().getApplicationContext());
mcallbackManager=CallbackManager.Factory.create();
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.activity_main,container,false);
}
private FacebookCallback<LoginResult> mcallback = new FacebookCallback<LoginResult>() {
#Override
public void onSuccess(LoginResult loginResult) {
AccessToken accessToken = loginResult.getAccessToken();
Profile profile = Profile.getCurrentProfile();
if (profile != null){
mTextDetails.setText("Welcome "+ profile.getName());
}
}
#Override
public void onCancel() {
}
#Override
public void onError(FacebookException error) {
}
};
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
LoginButton loginButton = (LoginButton) view.findViewById(R.id.login_button);
loginButton. setReadPermissions("user_friends");
loginButton. setFragment(this);
loginButton.registerCallback(mcallbackManager, mcallback);
}
#Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
mcallbackManager.onActivityResult(requestCode, resultCode, data);
}}
The below code is my XML file
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.world.trialwithmugaputhagam.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/Welcome"
android:id="#+id/text_details"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:layout_above="#+id/login_button"/>
<com.facebook.login.widget.LoginButton
android:id="#+id/login_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="30dp"
android:layout_marginBottom="30dp"
android:layout_centerInParent="true"/></RelativeLayout>
Logcat error Sorry about the wrong alignment.
FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.world.trialwithmugaputhagam/com.example.world.trialwithmugaputhagam.MainActivity}: java.lang.ClassCastException: com.example.world.trialwithmugaputhagam.MainActivity cannot be cast to android.app.Activity
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2137)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.ClassCastException: com.example.world.trialwithmugaputhagam.MainActivity cannot be cast to android.app.Activity
at android.app.Instrumentation.newActivity(Instrumentation.java:1061)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2128)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
at android.app.ActivityThread.access$600(ActivityThread.java:141) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:137) 
at android.app.ActivityThread.main(ActivityThread.java:5103) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:525) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
at dalvik.system.NativeStart.main(Native Method)

Because you are extending MainActivity from Fragment. Thus, your MainActivity is not actually an Activity but a Fragment. Extend it from Activity or subclasses of Activity.
Like this:
MainActivity extends AppCompatActivity
Edit 1: (Based on comments):
You haven't initialized mTextDetails;
try to do like this in Activity's onCreate:
mTextDetails = (TextView)findViewById(R.id.text_view_id);

Android Error: Unable to resume activity..?

I'm new to android and trying to add Facebook login and catch the event after clicking the Logout button(using AccessTokenTracker) in android using facebook sdk using Android studio but i'm getting this error
here is the logcat,
// (please horizontal scroll for logcat)
01-12 00:47:15.306 12572-12572/com.example.arpit.facebooklogindemo E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to resume activity {com.example.arpit.facebooklogindemo/com.example.arpit.facebooklogindemo.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2790)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2819)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2266)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.example.arpit.facebooklogindemo.MainActivity.onResume(MainActivity.java:83)
at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1192)
at android.app.Activity.performResume(Activity.java:5211)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2780)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2819) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2266) 
at android.app.ActivityThread.access$600(ActivityThread.java:141) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
at android.os.Handler.dispatchMessage(Handler.java:99) 
at android.os.Looper.loop(Looper.java:137) 
at android.app.ActivityThread.main(ActivityThread.java:5103) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:525) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
at dalvik.system.NativeStart.main(Native Method)
Here is AndroidManifest.xml,
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.arpit.facebooklogindemo">
<uses-permission android:name="android.permission.INTERNET"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
//from http://developers.facebook.com
<meta-data android:name="com.facebook.sdk.ApplicationId"
android:value="#string/app_id"/>
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
//from http://developers.facebook.com
<activity android:name="com.facebook.FacebookActivity"
android:configChanges=
"keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:theme="#android:style/Theme.Translucent.NoTitleBar"
android:label="#string/app_name" />
</application>
</manifest>
Here is activity_main.xml,
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context="com.example.arpit.facebooklogindemo.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
android:id="#+id/textView2" />
//from http://developers.facebook.com
<com.facebook.login.widget.LoginButton
android:id="#+id/login_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Large Text"
android:id="#+id/textView"
android:layout_above="#+id/login_button"
android:layout_centerHorizontal="true"
android:layout_marginBottom="90dp" />
</RelativeLayout>
Here is MainActivity.java,
package com.example.arpit.facebooklogindemo;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import com.facebook.AccessToken;
import com.facebook.AccessTokenTracker;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.Profile;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;
public class MainActivity extends AppCompatActivity {
CallbackManager callbackManager;
LoginButton loginButton;
TextView textView;
AccessTokenTracker accessTokenTracker;
private FacebookCallback<LoginResult> mFacebookCallback = new FacebookCallback<LoginResult>() {
#Override
public void onSuccess(LoginResult loginResult) {
Profile profile = Profile.getCurrentProfile();
if(profile != null){
fillTextView(profile);
}
}
#Override
public void onCancel() {
}
#Override
public void onError(FacebookException error) {
Log.d("find", String.valueOf(error));
}
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(getApplicationContext());
setContentView(R.layout.activity_main);
textView = (TextView)findViewById(R.id.textView);
callbackManager = CallbackManager.Factory.create();
accessTokenTracker = new AccessTokenTracker() {
#Override
protected void onCurrentAccessTokenChanged(AccessToken oldAccessToken, AccessToken currentAccessToken) {
if(currentAccessToken == null){
textView.setText("Logged out");
}
}
};
accessTokenTracker.startTracking();
loginButton = (LoginButton)findViewById(R.id.login_button);
loginButton.registerCallback(callbackManager, mFacebookCallback);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
}
#Override
protected void onResume(){
super.onResume();
Profile profile = Profile.getCurrentProfile();
textView.setText(profile.getName());
}
#Override
protected void onDestroy(){
super.onDestroy();
accessTokenTracker.stopTracking();
}
private void fillTextView(Profile profile){
textView.setText(profile.getName());
}
}

Look at this line in your logs:
Caused by: java.lang.NullPointerException
at com.example.arpit.facebooklogindemo.MainActivity.onResume(MainActivity.java:83)
It is clearly mentioned that your app is crashing due to NullPointerException in onResume() function. One possible reason is you might be getting null profile details while calling profile.getName()
Make a null checking before setting text as below:
Profile profile = Profile.getCurrentProfile();
if(null != profile)
textView.setText(profile.getName());
Sometimes, you might get null or old profile details. In such case, you need to request for updated profile details. Below is samle code:
Profile profile = Profile.getCurrentProfile();
if(null != profile) {
new ProfileTracker() {
#Override
protected void onCurrentProfileChanged(Profile oldProfile, Profile currentProfile) {
if (currentProfile != null) {
// handle it
stopTracking();
}
}
}.startTracking();
} else {
textView.setText(profile.getName());
}

put a null check on your onResume before setting textView.

Eclipse "Sorry- The application (Appname) has stopped unexpectedly. Please try again"

Hey im a begginer in android coding and ive been following this series on youtube. Whenever I run my project as an android application and go to the emulator to select it, it gives me "Sorry- The application (Appname) has stopped unexpectedly. Please try again" Eclipse doesnt give me any error line to where the problem is and so it is very frustrating.. Ive been looking on the internet for answers to this, but I havent been able to fix it. I think it has something to do with my Manifest. Whenever i run my application there are errors on my LogCat.
My application is a small app that when selected will first open a logo screen for 3 seconds then it will take you to an interface where there are 2 buttons to choose from. Both buttons lead to this thing that edits text.
Ive posted all my code below and please guys keep in mind when you answer that I am a begginer and might not understand some terms. Thank you!
Here is my LogCat when i try to start it
07-20 20:19:17.382: D/dalvikvm(254): GC_EXTERNAL_ALLOC freed 663 objects / 51912 bytes in 177ms
07-20 20:19:19.791: D/AndroidRuntime(254): Shutting down VM
07-20 20:19:19.801: W/dalvikvm(254): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
07-20 20:19:19.811: E/AndroidRuntime(254): FATAL EXCEPTION: main
07-20 20:19:19.811: E/AndroidRuntime(254): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.thepasics/com.example.thepasics.Menu}: java.lang.ClassNotFoundException: com.example.thepasics.Menu in loader dalvik.system.PathClassLoader[/data/app/com.example.thepasics-2.apk]
07-20 20:19:19.811: E/AndroidRuntime(254): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
07-20 20:19:19.811: E/AndroidRuntime(254): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
07-20 20:19:19.811: E/AndroidRuntime(254): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
07-20 20:19:19.811: E/AndroidRuntime(254): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
07-20 20:19:19.811: E/AndroidRuntime(254): at android.os.Handler.dispatchMessage(Handler.java:99)
07-20 20:19:19.811: E/AndroidRuntime(254): at android.os.Looper.loop(Looper.java:123)
07-20 20:19:19.811: E/AndroidRuntime(254): at android.app.ActivityThread.main(ActivityThread.java:4627)
07-20 20:19:19.811: E/AndroidRuntime(254): at java.lang.reflect.Method.invokeNative(Native Method)
07-20 20:19:19.811: E/AndroidRuntime(254): at java.lang.reflect.Method.invoke(Method.java:521)
07-20 20:19:19.811: E/AndroidRuntime(254): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-20 20:19:19.811: E/AndroidRuntime(254): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-20 20:19:19.811: E/AndroidRuntime(254): at dalvik.system.NativeStart.main(Native Method)
07-20 20:19:19.811: E/AndroidRuntime(254): Caused by: java.lang.ClassNotFoundException: com.example.thepasics.Menu in loader dalvik.system.PathClassLoader[/data/app/com.example.thepasics-2.apk]
07-20 20:19:19.811: E/AndroidRuntime(254): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
07-20 20:19:19.811: E/AndroidRuntime(254): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
07-20 20:19:19.811: E/AndroidRuntime(254): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
07-20 20:19:19.811: E/AndroidRuntime(254): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
07-20 20:19:19.811: E/AndroidRuntime(254): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
07-20 20:19:19.811: E/AndroidRuntime(254): ... 11 more
My Manifest
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.thepasics"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/icon"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.thepasics.Main"
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="Menu"
android:label="#string/app_name" >
<intent-filter>
<action android:name="com.example.thePasics.MENU" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".TutorialOne"
android:label="#string/app_name" >
<intent-filter>
<action android:name="com.example.thePasics.TUTORIALONE" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
I have 3 Java files which are Menu.java Main.java TutorialOne.java. This one is the Main one
package com.example.thepasics;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
public class Main extends Activity {
MediaPlayer logoMusic;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
logoMusic = MediaPlayer.create(Main.this, R.raw.music);
logoMusic.start();
Thread logoTimer = new Thread(){
public void run(){
try{
sleep(2000);
Intent menuIntent = new Intent("com.example.thePasics.MENU");
startActivity(menuIntent);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally{
finish();
}
}
};
logoTimer.start();
}
#Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
logoMusic.release();
}
}
This One is the menu.java
package com.example.thepasics;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class menu extends Activity{
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//Button sound
final MediaPlayer buttonSound = MediaPlayer.create(menu.this, R.raw.buttonsound);
//Setting up button references
Button tut1 = (Button) findViewById(R.id.button1);
Button tut2 = (Button) findViewById(R.id.button2);
tut1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
buttonSound.start();
startActivity(new Intent("com.example.thepasics.TUTORIALONE"));
}
});
tut2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
buttonSound.start();
startActivity(new Intent("com.example.thepasics.TutorialOne"));
}
});
}
#Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
}
}
The third one is the TutorialOne.java
import android.app.Activity;
import android.graphics.Typeface;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.TextView;
public class TutorialOne extends Activity implements OnCheckedChangeListener{
TextView textOut;
EditText textIn;
RadioGroup gravityG, styleG;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.tutorial1);
textOut = (TextView) findViewById(R.id.tvChange);
textIn = (EditText) findViewById(R.id.editText1);
gravityG = (RadioGroup) findViewById(R.id.rgGravity);
gravityG.setOnCheckedChangeListener(this);
styleG = (RadioGroup) findViewById(R.id.rgStyle);
styleG.setOnCheckedChangeListener(this);
Button gen = (Button) findViewById(R.id.bGenerate);
gen.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
textOut.setText(textIn.getText());
}
});
}
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
switch(checkedId){
case R.id.rbLeft:
textOut.setGravity(Gravity.LEFT);
break;
case R.id.rbCenter:
textOut.setGravity(Gravity.CENTER);
break;
case R.id.rbRight:
textOut.setGravity(Gravity.RIGHT);
break;
case R .id.rbNormal:
textOut.setTypeface(Typeface.defaultFromStyle(Typeface.NORMAL), Typeface.NORMAL);
break;
case R .id.rbItalic:
textOut.setTypeface(Typeface.defaultFromStyle(Typeface.ITALIC), Typeface.ITALIC);
break;
case R .id.rbBold:
textOut.setTypeface(Typeface.defaultFromStyle(Typeface.BOLD), Typeface.BOLD);
break;
}
}
}
My 3 xml files are splash, tutorial1 and main
this one is main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/backgroundwithoutericapp"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Choose a function" />
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Button1"
android:textSize="25dp"
android:textStyle="bold"
android:id="#+id/button1"/>
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Button2"
android:textSize="25dp"
android:textStyle="bold"
android:id="#+id/button2"/>
</LinearLayout>
second one is splash.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#drawable/background">
</LinearLayout>
third one is tutorial1.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/tutorialonebackground"
android:orientation="vertical" >
<EditText
android:id="#+id/editText1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="2" >
<TextView
android:id="#+id/tvStyle"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:gravity="center"
android:text="Style"
android:textSize="25dp"
android:textStyle="bold" />
<TextView
android:id="#+id/tvGravity"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1"
android:gravity="center"
android:text="Gravity"
android:textSize="25dp"
android:textStyle="bold" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:weightSum="2" >
<RadioGroup
android:id="#+id/rgStyle"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical" >
<RadioButton
android:id="#+id/rbNormal"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Normal" />
<RadioButton
android:id="#+id/rbItalic"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Italic" />
<RadioButton
android:id="#+id/rbBold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Bold" />
</RadioGroup>
<RadioGroup
android:id="#+id/rgGravity"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical" >
<RadioButton
android:id="#+id/rbLeft"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Left" />
<RadioButton
android:id="#+id/rbCenter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Center" />
<RadioButton
android:id="#+id/rbRight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Right" />
</RadioGroup>
</LinearLayout>
<TextView
android:id="#+id/tvChange"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Type in Text and Press the Button Below" />
<Button
android:id="#+id/bGenerate"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Generate" />
</LinearLayout>

You have specified wrong class name in manifest.xml
Replace
<activity
android:name="Menu"
android:label="#string/app_name" >
with
<activity
android:name="com.example.thepasics.menu"
android:label="#string/app_name" >

Your Manifest and menu activity don't match. Your manifest has
<activity
android:name="Menu" ...
which first of all isn't a valid name. It could be either android:name=".Menu" to refer to com.com.example.thepasics.Menu or you could use the fully qualified name (as you did for com.example.thepasics.Main).
In addition, your class is named menu, not Menu - remember it is case sensitive. Java convention has class names starting with a capital letter, so it should probably be corrected to Menu.

Your Menu class is actually called "menu" and not "MENU".
public class menu extends Activity{
Try changing "com.example.thePasics.MENU" to "com.example.thePasics.menu" throughout your app.

I only have looked into your Logcat:
07-20 20:19:19.801: W/dalvikvm(254): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
07-20 20:19:19.811: E/AndroidRuntime(254): FATAL EXCEPTION: main
07-20 20:19:19.811: E/AndroidRuntime(254): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.thepasics/com.example.thepasics.Menu}: java.lang.ClassNotFoundException: com.example.thepasics.Menu in loader dalvik.system.PathClassLoader[/data/app/com.example.thepasics-2.apk]
Your app is crashing becuase your com.example.thepasics.Menu is not being found, and also use android:name=".Menu" instead of android:name="Menu".