Fragment y FragmentList no muestra Android Studio

Quiero implementar la lista de tabuladores con FragmentActivity. Estoy apuntando API 14 (4.0). Mi aplicación funciona bien, pero la lista de barras de pestañas no aparece … No sé lo que estoy haciendo mal … Gracias por ayuda!

MainActivity.java:

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import android.app.ActionBar; import android.app.FragmentTransaction; import android.content.Intent; import android.annotation.TargetApi; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.os.AsyncTask; import android.os.Build; import android.support.v4.app.FragmentActivity; import android.support.v4.view.ViewPager; import android.os.Bundle; import android.support.v7.app.ActionBarActivity; import android.text.Html; import android.util.Log; import android.view.Menu; import android.view.View; import android.view.Window; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import com.squareup.okhttp.Call; import com.squareup.okhttp.Callback; import com.squareup.okhttp.OkHttpClient; import com.squareup.okhttp.Request; import com.squareup.okhttp.Response; import org.json.JSONException; import org.json.JSONObject; import org.jsoup.Jsoup; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import butterknife.ButterKnife; import butterknife.InjectView; import static android.location.Location.convert; public class MainActivity extends ActionBarActivity implements ActionBar.TabListener { public static final String TAG = MainActivity.class.getSimpleName(); SectionsPagerAdapter mSectionsPagerAdapter; /** * The {@link android.support.v4.view.ViewPager} that will host the section contents. */ ViewPager mViewPager; private CurrentReportString mCurrentReportString; @InjectView(R.id.jsonText) TextView mJsonText; @InjectView(R.id.imageReport) ImageView mImageReport; @InjectView(R.id.imageReport2) ImageView mImageReport2; @InjectView(R.id.imageReport3) ImageView mImageReport3; @InjectView(R.id.adminText) TextView mAdminText; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ButterKnife.inject(this); mAdminText.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(MainActivity.this, LoginActivity.class); startActivity(intent); } }); String urlWebSite = "http://www.bundoransurfco.com/surf-report/surf-report/?json=1"; if (isNetworkAvailable()) { OkHttpClient client = new OkHttpClient(); Request request = new Request.Builder() .url(urlWebSite) .build(); Call call = client.newCall(request); call.enqueue(new Callback() { @Override public void onFailure(Request request, IOException e) { } @Override public void onResponse(Response response) throws IOException { try { String jsonData = response.body().string(); if (response.isSuccessful()) { mCurrentReportString = getCurrentDetails(jsonData); int numberOfPhotos = mCurrentReportString.getNumberOfPhotos(); if (numberOfPhotos == 1){ new DownloadImageTask(mImageReport) .execute(mCurrentReportString.getUrlImages()); } if (numberOfPhotos == 2){ new DownloadImageTask(mImageReport) .execute(mCurrentReportString.getUrlImages()); new DownloadImageTask(mImageReport2) .execute(mCurrentReportString.getUrlImages2()); } if (numberOfPhotos == 3){ new DownloadImageTask(mImageReport) .execute(mCurrentReportString.getUrlImages()); new DownloadImageTask(mImageReport2) .execute(mCurrentReportString.getUrlImages2()); new DownloadImageTask(mImageReport3) .execute(mCurrentReportString.getUrlImages3()); } if (numberOfPhotos > 3){ new DownloadImageTask(mImageReport) .execute(mCurrentReportString.getUrlImages()); new DownloadImageTask(mImageReport2) .execute(mCurrentReportString.getUrlImages2()); new DownloadImageTask(mImageReport3) .execute(mCurrentReportString.getUrlImages3()); } // Write in the main Thread. runOnUiThread(new Runnable() { @Override public void run() { updateReport(); } }); } else { alertUserAboutError(); } } catch (IOException e) { Log.e(TAG, "Exception caught: ", e); } catch (JSONException e){ Log.e(TAG, "Exception caught: ", e); } } }); } else { Toast.makeText(this, getString(R.string.network_unavailable_message), Toast.LENGTH_LONG).show(); } Log.d(TAG, "Main UI code is running!"); } @Override protected void onResume() { super.onResume(); initUI(); } private void updateReport() { mJsonText.setText(mCurrentReportString.getJsonContent()); if (mCurrentReportString.imageBackground == Boolean.FALSE) { Log.i(TAG, "No Background1"); mImageReport.setVisibility(View.INVISIBLE); } if (mCurrentReportString.imageBackground2 == Boolean.FALSE) { Log.i(TAG, "No Background2"); mImageReport2.setVisibility(View.INVISIBLE); } if (mCurrentReportString.imageBackground3 == Boolean.FALSE) { Log.i(TAG, "No Background3"); mImageReport3.setVisibility(View.INVISIBLE); } } @TargetApi(Build.VERSION_CODES.JELLY_BEAN) private CurrentReportString getCurrentDetails(String jsonData) throws JSONException { JSONObject report = new JSONObject(jsonData); JSONObject postJson = report.getJSONObject("post"); CurrentReportString currentReportString = new CurrentReportString(); String contentString = postJson.getString("content"); //Report String String contentWithoutWebcam = contentString.replace("CLICK HERE FOR LIVE PEAK WEBCAM", ""); int lastCharacter = contentWithoutWebcam.indexOf("#gallery-1"); String contentFirstPart = contentWithoutWebcam.substring(0, lastCharacter); String jsonText = stripHtml(contentFirstPart); currentReportString.setJsonContent(jsonText); //Images Document doc = Jsoup.parse(contentString); Elements relLinks = doc.select("a[rel]"); //Elements relLinks = doc.select("a[rel=prettyPhoto[gallery-113]]");// System.out.println("number of `rel`: "+relLinks.size()); currentReportString.setNumberOfPhotos(relLinks.size()); ArrayList<String> urls=new ArrayList<String>(); for (Element el : relLinks){ // Log.i(TAG, el.attr("href")); urls.add(el.attr("href")); } if (relLinks.size() == 0){ Log.i(TAG, "0 image"); currentReportString.setImageBackground(Boolean.FALSE); currentReportString.setImageBackground2(Boolean.FALSE); currentReportString.setImageBackground3(Boolean.FALSE); } else if (relLinks.size() == 1) { // Log.i(TAG, String.valueOf(urls)); currentReportString.setUrlImages(urls.get(0)); Log.i(TAG, "first URL : " + currentReportString.getUrlImages()); currentReportString.setImageBackground2(Boolean.FALSE); currentReportString.setImageBackground3(Boolean.FALSE); /* new DownloadImageTask(mImageReport) .execute(mCurrentReportString.getUrlImages());*/ } else if (relLinks.size() == 2){ currentReportString.setUrlImages(urls.get(0)); currentReportString.setUrlImages2(urls.get(1)); currentReportString.setImageBackground3(Boolean.FALSE); Log.i(TAG, "first URL : "+currentReportString.getUrlImages()); Log.i(TAG, "second URL : "+currentReportString.getUrlImages2()); /* new DownloadImageTask(mImageReport) .execute(mCurrentReportString.getUrlImages()); new DownloadImageTask(mImageReport2) .execute(mCurrentReportString.getUrlImages2());*/ } else if (relLinks.size() == 3){ currentReportString.setUrlImages(urls.get(0)); currentReportString.setUrlImages2(urls.get(1)); currentReportString.setUrlImages3(urls.get(2)); Log.i(TAG, "first URL : "+currentReportString.getUrlImages()); Log.i(TAG, "second URL : "+currentReportString.getUrlImages2()); Log.i(TAG, "third URL : "+currentReportString.getUrlImages3()); /* new DownloadImageTask(mImageReport2) .execute(mCurrentReportString.getUrlImages2()); new DownloadImageTask(mImageReport3) .execute(mCurrentReportString.getUrlImages3());*/ } else if (relLinks.size() > 3){ currentReportString.setUrlImages(urls.get(0)); currentReportString.setUrlImages2(urls.get(1)); currentReportString.setUrlImages3(urls.get(2)); Log.i(TAG, "first URL : "+currentReportString.getUrlImages()); Log.i(TAG, "second URL : "+currentReportString.getUrlImages2()); Log.i(TAG, "third URL : "+currentReportString.getUrlImages3()); /* new DownloadImageTask(mImageReport) .execute(mCurrentReportString.getUrlImages()); new DownloadImageTask(mImageReport2) .execute(mCurrentReportString.getUrlImages2()); new DownloadImageTask(mImageReport3) .execute(mCurrentReportString.getUrlImages3());*/ } return currentReportString; } private boolean isNetworkAvailable() { ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkInfo = manager.getActiveNetworkInfo(); boolean isAvailable = false; if (networkInfo != null && networkInfo.isConnected()) { isAvailable = true; } return isAvailable; } //Delete HTML Markup public String stripHtml(String html) { return Html.fromHtml(html).toString(); } private void alertUserAboutError() { AlertDialogFragment dialog = new AlertDialogFragment(); dialog.show(getFragmentManager(), "error_dialog"); } @Override public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) { mViewPager.setCurrentItem(tab.getPosition()); } @Override public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) { } @Override public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) { } //Change Image from ImageView in Asynch with URL. private class DownloadImageTask extends AsyncTask<String, Void, Bitmap> { ImageView bmImage; public DownloadImageTask(ImageView bmImage) { this.bmImage = bmImage; } protected Bitmap doInBackground(String... urls) { String urldisplay = urls[0]; Bitmap mIcon11 = null; try { InputStream in = new java.net.URL(urldisplay).openStream(); mIcon11 = BitmapFactory.decodeStream(in); } catch (Exception e) { Log.e("Error", e.getMessage()); e.printStackTrace(); } return mIcon11; } protected void onPostExecute(Bitmap result) { bmImage.setImageBitmap(result); } } /* @Override public void onTabSelected(android.support.v7.app.ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { // When the given tab is selected, switch to the corresponding page in // the ViewPager. mViewPager.setCurrentItem(tab.getPosition()); } @Override public void onTabUnselected(android.support.v7.app.ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } @Override public void onTabReselected(android.support.v7.app.ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { }*/ private void initUI(){ final android.support.v7.app.ActionBar actionBar = getSupportActionBar(); actionBar.setNavigationMode(android.support.v7.app.ActionBar.NAVIGATION_MODE_TABS); mSectionsPagerAdapter = new SectionsPagerAdapter(this, getSupportFragmentManager()); mViewPager = (ViewPager) findViewById(R.id.pager); mViewPager.setAdapter(mSectionsPagerAdapter); mViewPager .setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { actionBar.setSelectedNavigationItem(position); } }); for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) { actionBar.addTab(actionBar.newTab() .setText(mSectionsPagerAdapter.getPageTitle(i)) .setTabListener((android.support.v7.app.ActionBar.TabListener) this)); } } /* public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; }*/ } 

AndroidManifest.xml:

 <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="jardelcompany.bundoransurfco" > <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.USE_CREDENTIALS" /> <!-- To retrieve the account name (email) as part of sign-in: --> <uses-permission android:name="android.permission.GET_ACCOUNTS" /> <!-- To auto-complete the email text field in the login form with the user's emails --> <uses-permission android:name="android.permission.READ_PROFILE" /> <uses-permission android:name="android.permission.READ_CONTACTS" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".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=".LoginActivity" android:label="@string/title_activity_login" android:parentActivityName=".MainActivity" android:screenOrientation="portrait" android:windowSoftInputMode="adjustResize|stateVisible" > </activity> </application> </manifest> 

Styles.xml:

 <resources> <!-- Base application theme. --> <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"> <!-- Customize your theme here. --> </style> </resources> 

SectionsPagerAdapter.java:

  import java.util.Locale; import android.content.Context; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; public class SectionsPagerAdapter extends FragmentPagerAdapter { protected Context mContext; public SectionsPagerAdapter(Context context, FragmentManager fm) { super(fm); mContext = context; } @Override public Fragment getItem(int position) { switch(position) { case 0: return new FirstFragment(); case 1: return new LoginFragment(); } return null; } @Override public int getCount() { return 2; } @Override public CharSequence getPageTitle(int position) { Locale l = Locale.getDefault(); switch (position) { case 0: return mContext.getString(R.string.title_section1).toUpperCase(l); case 1: return mContext.getString(R.string.title_section2).toUpperCase(l); } return null; } } 

LoginFragment.java:

  import android.os.Bundle; import android.support.v4.app.ListFragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; public class LoginFragment extends ListFragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.activity_login, container, false); return rootView; } } 

Activity_login.xml:

 <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:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" android:background="#FFFFFF" tools:context="jardelcompany.bundoransurfco.LoginFragment"> </RelativeLayout> 

FirstFragment.java:

 import android.os.Bundle; import android.support.v4.app.ListFragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; public class FirstFragment extends ListFragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.activity_main, container, false); return rootView; } } 

Activity_main.xml:

 <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" tools:context=".MainActivity" android:id="@+id/mainLayout" android:background="#FFFFFF"> /> <view android:layout_width="match_parent" android:layout_height="match_parent" class="android.support.v4.view.ViewPager" android:id="@+id/pager"/> </RelativeLayout> 

Desplome de Logcat:

 FATAL EXCEPTION: main Process: jardelcompany.bundoransurfco, PID: 2250 java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list' 

 @Override protected void onResume() { super.onResume(); initUI(); } 

 @Override protected void onResume() { super.onResume(); initUI(); }