Android Action Bar navigation up button not working on devices

Action Bar up navigation button works fine in emulator but does not work in device can any one help me out MainActivity ``` @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.mainpage); tf = Typeface.createFromAsset(getAssets(), "font/AGENCYB.TTF"); Button btnWeatherDetails = (Button) findViewById(R.id.btnWeather); Button btnMovieDetails = (Button) findViewById(R.id.btnMovies); Button btnHoroscopeDetails = (Button) findViewById(R.id.btnHoroscope); btnWeatherDetails.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent i = new Intent(MainActivity.this, WeatherActivity.class); MainActivity.this.startActivity(i); } }); btnMovieDetails.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { Intent i = new Intent(MainActivity.this, MovieActivity.class); MainActivity.this.startActivity(i); } }); btnHoroscopeDetails.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View arg0) { Intent i = new Intent(MainActivity.this, HoroscopeActivity.class); MainActivity.this.startActivity(i); } }); } @Override protected void onDestroy() { SharedPreferences settingsPreferences = getSharedPreferences(PREF_NAME, MODE_PRIVATE); SharedPreferences.Editor settingsEditor= settingsPreferences.edit(); settingsEditor.putBoolean(MovieActivity.MOVIEUPDATED, false); settingsEditor.putBoolean(HoroscopeActivity.HOROSCOPEAVAILABLE, false); settingsEditor.commit(); super.onDestroy(); } ``` WeatherActivity ``` @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.scrollmain); getActionBar().setDisplayHomeAsUpEnabled(true); settingsPreferences = getSharedPreferences(MainActivity.PREF_NAME, MODE_PRIVATE); SavedString = settingsPreferences.getString(JSONWEATHERSTRING, "Not Found"); new JSONParse().execute(WeatherUrl); } public boolean onCreateOptionMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } public boolean onOptionItemSelected(MenuItem item) { switch(item.getItemId()){ case android.R.id.home: NavUtils.navigateUpFromSameTask(this); return true; } return super.onOptionsItemSelected(item); } public void onBackPressed() { moveTaskToBack(true); WeatherActivity.this.finish(); } ``` MovieActivity ``` public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); settingsPreferences = getSharedPreferences(MainActivity.PREF_NAME, MODE_PRIVATE); MovieJsonString = settingsPreferences.getString(JSONMOVIESTRING, "Not Found"); isMovieUpdated = settingsPreferences.getBoolean(MOVIEUPDATED, false); setContentView(R.layout.main_list_view); getActionBar().setDisplayHomeAsUpEnabled(true); movieList = new ArrayList<HashMap<String, String>>(); list = getListView(); // Calling async task to get json if(!isMovieUpdated) new GetMovieDetails().execute(); else GetMoviePreferences(); } public boolean onCreateOptionMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } public boolean onOptionItemSelected(MenuItem item) { switch(item.getItemId()){ case android.R.id.home: NavUtils.navigateUpFromSameTask(this); return true; } return super.onOptionsItemSelected(item); } public void onBackPressed() { moveTaskToBack(true); MovieActivity.this.finish(); } ``` HoroscopeActivity ``` public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.horoscope); getActionBar().setDisplayHomeAsUpEnabled(true); settingsPreferences = getSharedPreferences(MainActivity.PREF_NAME, MODE_PRIVATE); isHoroAvailable = settingsPreferences.getBoolean(HOROSCOPEAVAILABLE,false); if(!isHoroAvailable) new XMLParse().execute(); else GetHoroscopeFromPreference(); } public boolean onCreateOptionMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } public boolean onOptionItemSelected(MenuItem item) { switch(item.getItemId()){ case android.R.id.home: NavUtils.navigateUpFromSameTask(this); return true; } return super.onOptionsItemSelected(item); } public void onBackPressed() { moveTaskToBack(true); HoroscopeActivity.this.finish(); } ``` Manifest File ``` <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="in.datumdata.weather" android:installLocation="auto" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="18" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT" /> <application android:allowBackup="true" android:icon="@drawable/ic_hosurdata" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="in.datumdata.hosurdata.MainActivity" android:label="@string/app_name" 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="in.datumdata.hosurdata.MovieActivity" android:label="Movie Details" android:parentActivityName="in.datumdata.hosurdata.MainActvity" android:screenOrientation="portrait" /> <activity android:name="in.datumdata.hosurdata.WeatherActivity" android:label="Weather Details" android:parentActivityName="in.datumdata.hosurdata.MainActvity" android:screenOrientation="portrait" /> <activity android:name="in.datumdata.hosurdata.SingleContactActivity" android:label="Movie Details" android:parentActivityName="in.datumdata.hosurdata.MovieActivity" android:screenOrientation="portrait" /> <activity android:name="in.datumdata.hosurdata.HoroscopeActivity" android:label="Horoscope Details" android:parentActivityName="in.datumdata.hosurdata.MainActvity" android:screenOrientation="portrait" /> <activity android:name="in.datumdata.hosurdata.SingleHoroscopeActivity" android:label="Horoscope Details" android:parentActivityName="in.datumdata.hosurdata.HoroscopeActivity" android:screenOrientation="portrait" /> </application> </manifest> ``` In all the above activities the navigation button works fine in emulator but on device it does not work and when i press the back button on the device the application goes invisible i mean to say its running in the background. This thing happens on all activities on whatever activity i press back button the same thing happens help me out. thanks in advance and sorry for my bad english.