Java 类android.support.v4.app.FragmentStatePagerAdapter 实例源码

@Override
public Object instantiateItem(ViewGroup container, int position) {
    mViewPager = ((ViewPager) container);
    int realPosition =  (mAdapter instanceof FragmentPagerAdapter || mAdapter instanceof FragmentStatePagerAdapter)
            ? position
            : toRealPosition(position);

    if (mBoundaryCaching) {
        ToDestroy toDestroy = mToDestroy.get(position);
        if (toDestroy != null) {
            mToDestroy.remove(position);
            return toDestroy.object;
        }
    }

    if(realPosition >= 0 && realPosition < getRealCount())
        return mAdapter.instantiateItem(container, realPosition);
    return null;
}

private void initPager() {
    pager.setVisibility(View.VISIBLE);
    recyclerView.setVisibility(View.GONE);
    recyclerView.setAdapter(null);
    adapter = new FragmentStatePagerAdapter(getChildFragmentManager()) {

        @Override
        public int getCount() {
            return playlistcount;
        }

        @Override
        public Fragment getItem(int position) {
            return PlaylistPagerFragment.newInstance(position);
        }

    };
    pager.setAdapter(adapter);
    pager.setOffscreenPageLimit(3);
}

private void setupViews(PhotoViewPager viewPager) {
    final ArrayList<String> images = getIntent().getStringArrayListExtra(EXTRA_IMAGES);
    if (images == null || images.isEmpty()) {
        Log.e(TAG, "images is null ");
        // TODO: 2017/11/15 show a error view
        return;
    }

    FragmentStatePagerAdapter adapter = new FragmentStatePagerAdapter(getSupportFragmentManager()) {
        @Override
        public Fragment getItem(int i) {
            final String image = images.get(i);
            return PhotoViewFragment.newInstance(image);
        }

        @Override
        public int getCount() {
            return images.size();
        }
    };

    final int position = getIntent().getIntExtra(EXTRA_POSITION, 0);
    viewPager.setAdapter(adapter);
    viewPager.setCurrentItem((position >= images.size() || position <= 0) ? 0 : position);
}

/**
 * 将back事件分发给ViewPager中的Fragment,{@link #handleBackPress(FragmentManager)} 已经实现了对ViewPager的支持，所以自行决定是否使用该方法
 *
 * @return 如果处理了back键则返回 <b>true</b>
 * @see #handleBackPress(FragmentManager)
 * @see #handleBackPress(Fragment)
 * @see #handleBackPress(FragmentActivity)
 */
public static boolean handleBackPress(ViewPager viewPager) {
    if (viewPager == null) return false;
    PagerAdapter adapter = viewPager.getAdapter();
    if (adapter == null) return false;
    int currentItem = viewPager.getCurrentItem();
    Fragment fragment;
    if (adapter instanceof FragmentPagerAdapter) {
        fragment = ((FragmentPagerAdapter) adapter).getItem(currentItem);
    } else if (adapter instanceof FragmentStatePagerAdapter) {
        fragment = ((FragmentStatePagerAdapter) adapter).getItem(currentItem);
    } else {
        fragment = null;
    }
    return isFragmentBackHandled(fragment);
}

/**
 * 将back事件分发给ViewPager中的Fragment,{@link #handleBackPress(FragmentManager)} 已经实现了对ViewPager的支持，所以自行决定是否使用该方法
 *
 * @return 如果处理了back键则返回 <b>true</b>
 * @see #handleBackPress(FragmentManager)
 * @see #handleBackPress(Fragment)
 * @see #handleBackPress(FragmentActivity)
 */
public static boolean handleBackPress(ViewPager viewPager) {
    if (viewPager == null) return false;

    PagerAdapter adapter = viewPager.getAdapter();

    if (adapter == null) return false;

    int currentItem = viewPager.getCurrentItem();
    Fragment fragment;
    if (adapter instanceof FragmentPagerAdapter) {
        fragment = ((FragmentPagerAdapter) adapter).getItem(currentItem);
    } else if (adapter instanceof FragmentStatePagerAdapter) {
        fragment = ((FragmentStatePagerAdapter) adapter).getItem(currentItem);
    } else {
        fragment = null;
    }
    return isFragmentBackHandled(fragment);
}

private void checkFragmentStatus(final Activity activity, final int adapterItemIndex)
{
    final ViewPager viewPager = (ViewPager) activity.findViewById(R.id.pager);
    assertNotNull(viewPager);
    final FragmentStatePagerAdapter adapter = (FragmentStatePagerAdapter)viewPager.getAdapter();
    assertNotNull(adapter);

    Fragment fragment = adapter.getItem(adapterItemIndex);
    assertNotNull(fragment);

    Bundle arguments = fragment.getArguments();
    assertNotNull(arguments);
    final int expectedTransactionType = (adapterItemIndex == 0) ?
            DBHelper.TransactionDbIds.EXPENSE : DBHelper.TransactionDbIds.REVENUE;
    assertEquals(expectedTransactionType, arguments.getInt("type"));
}

@Test
public void correctFragmentsInTabs()
{
    ActivityController activityController = Robolectric.buildActivity(TransactionActivity.class).create();

    Activity activity = (Activity)activityController.get();
    activityController.start();
    activityController.resume();

    final ViewPager viewPager = (ViewPager) activity.findViewById(R.id.pager);
    assertNotNull(viewPager);
    final FragmentStatePagerAdapter adapter = (FragmentStatePagerAdapter)viewPager.getAdapter();
    assertNotNull(adapter);
    assertEquals(2, adapter.getCount());

    checkFragmentStatus(activity, 0);
    checkFragmentStatus(activity, 1);
}

private void initFragmentAdapter() {
    frameLayout=(FrameLayout) findViewById(R.id.fragHome);
    statePagerAdapter=new FragmentStatePagerAdapter(getSupportFragmentManager()) {
        public int getCount() {
            return 4;
        }
        public Fragment getItem(int arg0) {
            switch (arg0) {
            case 0:
                return new NewsFragment();
            case 1:
                return new HotgoodsFragment();
            case 2:
                return new ITcircleFragment();
            case 3:
                return new MineFragment();
            default:
                return null;
            }
        }
    };

}

@Override
    protected void refreshFromOptionsMenu() {
        super.refreshFromOptionsMenu();
        /** this hack worked with FragmenPagerAdapter but not with FragmentStatePagerAdapter */
//        Fragment currentFragment = getSupportFragmentManager().findFragmentByTag("android:switcher:" + R.id.pegel_data_pager + ":" + mPager.getCurrentItem());
        Fragment currentFragment = (Fragment) ((FragmentStatePagerAdapter)mPagerAdapter).instantiateItem(mPager, mPager.getCurrentItem());
        if(currentFragment != null ) {
            switch (mPager.getCurrentItem()) {
                case 0:
                    ((PegelDataFragment) currentFragment).loadData(true);
                    break;
                case 1:
                    ((PegelDataDetailFragment) currentFragment).loadData(true);
                    break;
                case 2:
                    ((PegelDetailFragment) currentFragment).loadData(true);
                    break;
                case 3:
                    ((PegelMapFragment) currentFragment).loadData(true);
                    break;

            }
        }


    }

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment

    // create ContextThemeWrapper from the original Activity Context with the custom theme
    final Context contextThemeWrapper = new ContextThemeWrapper(getActivity(), R.style.PagerIndicatorDefaultNewWithDivider);

    // clone the inflater using the ContextThemeWrapper
    LayoutInflater localInflater = inflater.cloneInContext(contextThemeWrapper);

    // Inflate the layout for this fragment
    View rootView = localInflater.inflate(R.layout.fragment_card_payment, container, false);

    FragmentStatePagerAdapter adapter = new SavePayAdapter(getChildFragmentManager());
    ViewPager pager = (ViewPager) rootView.findViewById(R.id.pager);
    pager.setOffscreenPageLimit(options.size());
    pager.setAdapter(adapter);
    TabPageIndicator indicator = (TabPageIndicator) rootView.findViewById(R.id.indicator);
    indicator.setViewPager(pager);

    return rootView;
}

private void initViews() {
    mViewPager.setAdapter(new FragmentStatePagerAdapter(
            getSupportFragmentManager()) {

        @Override
        public int getCount() {
            return VolleyUtil.mImages.size();
        }

        @Override
        public Fragment getItem(int position) {
            return BeautyFragment.newInstance(VolleyUtil.mImages.get(position)
                    .getUrl());
        }
    });
    int positon = getIntent().getIntExtra(POSITION, 0);
    mViewPager.setCurrentItem(positon);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_pager);

    final MultiViewPager pager = (MultiViewPager) findViewById(R.id.pager);

    final FragmentStatePagerAdapter adapter = new FragmentStatePagerAdapter(getSupportFragmentManager()) {

        @Override
        public int getCount() {
            return 20;
        }

        @Override
        public Fragment getItem(int position) {
            return PageFragment.create(position);
        }

    };
    pager.setAdapter(adapter);
}

public void addTabs(FragmentStatePagerAdapter pageAdapter, final ViewPager pager, boolean scrollable) {
    if (tab_showed) {
        return;
    }
    final AppBarLayout appBar = (AppBarLayout) findViewById(R.id.appbar);

    final TabLayout tabLayout = (TabLayout) getLayoutInflater().inflate(R.layout.tab_layout, null);
    tabLayout.post(new Runnable() {
        @Override
        public void run() {
            tabLayout.setupWithViewPager(pager);
        }
    });
    if (!scrollable) {
        tabLayout.setTabMode(TabLayout.MODE_FIXED);
    }
    appBar.addView(tabLayout, 1);

    pager.setAdapter(pageAdapter);
    tab_showed = true;
}

private void test1() {
    setContentView(R.layout.activity_test_2);

    BackgroundViewPager2 viewPager = (BackgroundViewPager2) findViewById(R.id.viewPager2);
    viewPager.setViewPagerBackground(R.drawable.wide_bg);
    viewPager.setAdapter(new FragmentStatePagerAdapter(
            getSupportFragmentManager()) {

        @Override
        public int getCount() {
            return 3;
        }

        @Override
        public Fragment getItem(int arg0) {
            return MyFragment.newInstance(arg0 + 1);
        }
    });
}

private void test2() {
    setContentView(R.layout.activity_test);

    BackgroundViewPager viewPager = (BackgroundViewPager) findViewById(R.id.flowViewPager1);
    viewPager.setAdapter(new FragmentStatePagerAdapter(
            getSupportFragmentManager()) {

        @Override
        public int getCount() {
            return 3;
        }

        @Override
        public Fragment getItem(int arg0) {
            return MyFragment.newInstance(arg0 + 1);
        }
    });
}

@Before
    public void setUp() throws IllegalAccessException {
        context = Robolectric.application;
        initMocks(this);
        wizardActivity = new WizardActivity() {
            FragmentStatePagerAdapter getWizardPagerAdapter() {
                return mockPagerAdapter;
            }
        };
//        wizardActivity.onCreate(null);
//
//        when(mockFragment.action()).thenReturn("Action");
//        when(mockFragment.performAction()).thenReturn(true);
//        when(mockFragment.getView()).thenReturn(mock(EditText.class));
//        when(mockPagerAdapter.getItem(anyInt())).thenReturn(mockFragment);
//        when(mockPagerAdapter.getCount()).thenReturn(3);

//        previousButton = (Button) wizardActivity.findViewById(R.id.previous_button);
//        actionButton = (Button) wizardActivity.findViewById(R.id.action_button);
//        viewPager = (WizardViewPager) wizardActivity.findViewById(R.id.wizard_view_pager);
    }

@Override public Object instantiateItem(ViewGroup container, int position) {
    int realPosition = (mAdapter instanceof FragmentPagerAdapter
            || mAdapter instanceof FragmentStatePagerAdapter) ? position
            : toRealPosition(position);

    if (mBoundaryCaching) {
        ToDestroy toDestroy = mToDestroy.get(position);
        if (toDestroy != null) {
            mToDestroy.remove(position);
            return toDestroy.object;
        }
    }
    return mAdapter.instantiateItem(container, realPosition);
}

@Override public void destroyItem(ViewGroup container, int position, Object object) {
    int realFirst = getRealFirstPosition();
    int realLast = getRealLastPosition();
    int realPosition = (mAdapter instanceof FragmentPagerAdapter
            || mAdapter instanceof FragmentStatePagerAdapter) ? position
            : toRealPosition(position);

    if (mBoundaryCaching && (position == realFirst || position == realLast)) {
        mToDestroy.put(position, new ToDestroy(container, realPosition, object));
    } else {
        mAdapter.destroyItem(container, realPosition, object);
    }
}

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_crime_pager);

    UUID crimeId = (UUID) getIntent().getSerializableExtra(EXTRA_CRIME_ID);
    mViewPager = (ViewPager) findViewById(R.id.activity_crime_pager_view_pager);

    mCrimes = CrimeLab.get(this).getCrimes();
    FragmentManager fragmentManager = getSupportFragmentManager();
    mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {
        @Override
        public Fragment getItem(int position) {
            Crime crime = mCrimes.get(position);
            return CrimeFragment.newInstance(crime.getId());
        }

        @Override
        public int getCount() {
            return mCrimes.size();
        }
    });

    for (int i = 0; i < mCrimes.size(); i++){
        if (mCrimes.get(i).getId().equals(crimeId)){
            mViewPager.setCurrentItem(i);
            break;
        }
    }
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
    int realFirst = getRealFirstPosition();
    int realLast = getRealLastPosition();
    int realPosition = (mAdapter instanceof FragmentPagerAdapter || mAdapter instanceof FragmentStatePagerAdapter)
            ? position
            : toRealPosition(position);

    if (mBoundaryCaching && (position == realFirst || position == realLast)) {
        mToDestroy.put(position, new ToDestroy(container, realPosition,
                object));
    } else {
        mAdapter.destroyItem(container, realPosition, object);
    }
}

@Override
public Object instantiateItem(ViewGroup container, int position) {
    int innerPosition = (mAdapter instanceof FragmentPagerAdapter
            || mAdapter instanceof FragmentStatePagerAdapter) ? position
            : toInnerPosition(position);

    if (mBoundaryCaching) {
        ToDestroy toDestroy = mToDestroy.get(position);
        if (toDestroy != null) {
            mToDestroy.remove(position);
            return toDestroy.object;
        }
    }
    return mAdapter.instantiateItem(container, innerPosition);
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
    int innerPosition = (mAdapter instanceof FragmentPagerAdapter
            || mAdapter instanceof FragmentStatePagerAdapter) ? position
            : toInnerPosition(position);

    if (mBoundaryCaching && mToDestroy.get(innerPosition) == null) {
        mToDestroy.put(position, new ToDestroy(container, innerPosition, object));
    } else {
        mAdapter.destroyItem(container, innerPosition, object);
    }
}

@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
                         @Nullable Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_style_selector, container, false);

    if (ACTION.equals(Constants.SETTINGS_STYLE_SELECTOR_NOWPLAYING)) {

    }
    pager = (MultiViewPager) rootView.findViewById(R.id.pager);

    adapter = new FragmentStatePagerAdapter(getChildFragmentManager()) {

        @Override
        public int getCount() {
            return 6;
        }

        @Override
        public Fragment getItem(int position) {
            selectorFragment = SubStyleSelectorFragment.newInstance(position, ACTION);
            return selectorFragment;
        }

        @Override
        public int getItemPosition(Object object) {
            return POSITION_NONE;
        }
    };
    pager.setAdapter(adapter);
    scrollToCurrentStyle();

    return rootView;
}

@Override
public Object instantiateItem(ViewGroup container, int position) {
    int realPosition = (mAdapter instanceof FragmentPagerAdapter || mAdapter instanceof FragmentStatePagerAdapter)
            ? position
            : toRealPosition(position);

    if (mBoundaryCaching) {
        ToDestroy toDestroy = mToDestroy.get(position);
        if (toDestroy != null) {
            mToDestroy.remove(position);
            return toDestroy.object;
        }
    }
    return mAdapter.instantiateItem(container, realPosition);
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
    int realFirst = getRealFirstPosition();
    int realLast = getRealLastPosition();
    int realPosition = (mAdapter instanceof FragmentPagerAdapter || mAdapter instanceof FragmentStatePagerAdapter)
            ? position
            : toRealPosition(position);

    if (mBoundaryCaching && (position == realFirst || position == realLast)) {
        mToDestroy.put(position, new ToDestroy(container, realPosition,
                object));
    } else {
        mAdapter.destroyItem(container, realPosition, object);
    }
}

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
  View view = inflater.inflate(R.layout.fragment_news, container, false);
  toolbar = (Toolbar) view.findViewById(R.id.toolbar);
  toolbar.setTitle(getString(R.string.title_news));

  tabLayout = (TabLayout) view.findViewById(R.id.tabLayout);
  viewPager = (ViewPager) view.findViewById(R.id.viewPager);

  tabLayout.addOnTabSelectedListener(this);
  viewPager.addOnPageChangeListener(this);
  viewPager.setAdapter(new FragmentStatePagerAdapter(getFragmentManager()) {
    @Override
    public Fragment getItem(int position) {
      switch (position) {
        case 0:
          return itNewsFragment;
        case 1:
          return otherNewsFragment;
      }
      return null;
    }

    @Override
    public int getCount() {
      return 2;
    }
  });

  return view;
}

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);

  viewPager = (ViewPager) findViewById(R.id.home_view_pager);
  viewPager.setOffscreenPageLimit(2);
  viewPager.setAdapter(new FragmentStatePagerAdapter(getSupportFragmentManager()) {

    @Override
    public Fragment getItem(int position) {
      switch (position) {
        case 0:
          return todoFragment;
        case 1:
          return newsFragment;
        case 2:
          return bookFragment;
      }
      return null;
    }

    @Override
    public int getCount() {
      return 3;
    }
  });
  viewPager.addOnPageChangeListener(this);
  navigation = (BottomNavigationView) findViewById(R.id.navigation);
  navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
  runOnUiThread(new Runnable() {
    @Override
    public void run() {
      MainActivity.this.setTitle(getString(R.string.title_news));
    }
  });
}

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_oschina);

  toolbar = (Toolbar) findViewById(R.id.toolbar);
  toolbar.setTitle(R.string.oschina);
  toolbar.setNavigationOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
      OSChinaActivity.this.finish();
    }
  });

  tabLayout = (TabLayout) findViewById(R.id.tabLayout);
  viewPager = (ViewPager) findViewById(R.id.viewPager);

  tabLayout.addOnTabSelectedListener(this);
  viewPager.addOnPageChangeListener(this);

  viewPager.setAdapter(new FragmentStatePagerAdapter(getSupportFragmentManager()) {
    @Override
    public Fragment getItem(int position) {
      switch (position) {
        case 0:
          return osChinaIndustryFragment;
        case 1:
          return osChinaProjectFragment;
      }
      return null;
    }

    @Override
    public int getCount() {
      return 2;
    }
  });

}

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_v2ex);

  toolbar = (Toolbar) findViewById(R.id.toolbar);
  toolbar.setTitle(R.string.v2ex);
  toolbar.setNavigationOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
      V2exActivity.this.finish();
    }
  });

  tabLayout = (TabLayout) findViewById(R.id.tabLayout);
  viewPager = (ViewPager) findViewById(R.id.viewPager);

  tabLayout.addOnTabSelectedListener(this);
  viewPager.addOnPageChangeListener(this);

  viewPager.setAdapter(new FragmentStatePagerAdapter(getSupportFragmentManager()) {
    @Override
    public Fragment getItem(int position) {
      switch (position) {
        case 0:
          return v2exLatestFragment;
        case 1:
          return v2exHotFragment;
      }
      return null;
    }

    @Override
    public int getCount() {
      return 2;
    }
  });

}

@Override
public Object instantiateItem(ViewGroup container, int position) {
    int realPosition = (mAdapter instanceof FragmentPagerAdapter || mAdapter instanceof FragmentStatePagerAdapter)
            ? position
            : toRealPosition(position);

    if (mBoundaryCaching) {
        ToDestroy toDestroy = mToDestroy.get(position);
        if (toDestroy != null) {
            mToDestroy.remove(position);
            return toDestroy.object;
        }
    }
    return mAdapter.instantiateItem(container, realPosition);
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
    int realFirst = getRealFirstPosition();
    int realLast = getRealLastPosition();
    int realPosition = (mAdapter instanceof FragmentPagerAdapter || mAdapter instanceof FragmentStatePagerAdapter)
            ? position
            : toRealPosition(position);

    if (mBoundaryCaching && (position == realFirst || position == realLast)) {
        mToDestroy.put(position, new ToDestroy(container, realPosition,
                object));
    } else {
        mAdapter.destroyItem(container, realPosition, object);
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_crime_pager);

    UUID crimeId = (UUID) getIntent()
            .getSerializableExtra(EXTRA_CRIME_ID);

    mViewPager = (ViewPager) findViewById(R.id.crime_view_pager);

    mCrimes = CrimeLab.get(this).getCrimes();
    FragmentManager fragmentManager = getSupportFragmentManager();
    mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {

        @Override
        public Fragment getItem(int position) {
            Crime crime = mCrimes.get(position);
            return CrimeFragment.newInstance(crime.getId());
        }

        @Override
        public int getCount() {
            return mCrimes.size();
        }
    });

    for (int i = 0; i < mCrimes.size(); i++) {
        if (mCrimes.get(i).getId().equals(crimeId)) {
            mViewPager.setCurrentItem(i);
            break;
        }
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_crime_pager);

    UUID crimeId = (UUID) getIntent()
            .getSerializableExtra(EXTRA_CRIME_ID);

    mViewPager = (ViewPager) findViewById(R.id.crime_view_pager);

    mCrimes = CrimeLab.get(this).getCrimes();
    FragmentManager fragmentManager = getSupportFragmentManager();
    mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {

        @Override
        public Fragment getItem(int position) {
            Crime crime = mCrimes.get(position);
            return CrimeFragment.newInstance(crime.getId());
        }

        @Override
        public int getCount() {
            return mCrimes.size();
        }
    });

    for (int i = 0; i < mCrimes.size(); i++) {
        if (mCrimes.get(i).getId().equals(crimeId)) {
            mViewPager.setCurrentItem(i);
            break;
        }
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_crime_pager);

    UUID crimeId = (UUID) getIntent()
            .getSerializableExtra(EXTRA_CRIME_ID);

    mViewPager = (ViewPager) findViewById(R.id.crime_view_pager);

    mCrimes = CrimeLab.get(this).getCrimes();
    FragmentManager fragmentManager = getSupportFragmentManager();
    mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {

        @Override
        public Fragment getItem(int position) {
            Crime crime = mCrimes.get(position);
            return CrimeFragment.newInstance(crime.getId());
        }

        @Override
        public int getCount() {
            return mCrimes.size();
        }
    });

    for (int i = 0; i < mCrimes.size(); i++) {
        if (mCrimes.get(i).getId().equals(crimeId)) {
            mViewPager.setCurrentItem(i);
            break;
        }
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_crime_pager);

    UUID crimeId = (UUID) getIntent()
            .getSerializableExtra(EXTRA_CRIME_ID);

    mViewPager = (ViewPager) findViewById(R.id.view_pager);

    mCrimes = CrimeLab.get(this).getCrimes();
    FragmentManager fragmentManager = getSupportFragmentManager();
    mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {

        @Override
        public Fragment getItem(int position) {
            Crime crime = mCrimes.get(position);
            return CrimeFragment.newInstance(crime.getId());
        }

        @Override
        public int getCount() {
            return mCrimes.size();
        }
    });

    for (int i = 0; i < mCrimes.size(); i++) {
        if (mCrimes.get(i).getId().equals(crimeId)) {
            mViewPager.setCurrentItem(i);
            break;
        }
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_crime_pager);

    UUID crimeId = (UUID) getIntent()
            .getSerializableExtra(EXTRA_CRIME_ID);

    mViewPager = (ViewPager) findViewById(R.id.crime_view_pager);

    mCrimes = CrimeLab.get(this).getCrimes();
    FragmentManager fragmentManager = getSupportFragmentManager();
    mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {

        @Override
        public Fragment getItem(int position) {
            Crime crime = mCrimes.get(position);
            return CrimeFragment.newInstance(crime.getId());
        }

        @Override
        public int getCount() {
            return mCrimes.size();
        }
    });

    for (int i = 0; i < mCrimes.size(); i++) {
        if (mCrimes.get(i).getId().equals(crimeId)) {
            mViewPager.setCurrentItem(i);
            break;
        }
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_crime_pager);

    UUID crimeId = (UUID) getIntent()
            .getSerializableExtra(EXTRA_CRIME_ID);

    mViewPager = (ViewPager) findViewById(R.id.crime_view_pager);

    mCrimes = CrimeLab.get(this).getCrimes();
    FragmentManager fragmentManager = getSupportFragmentManager();
    mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {

        @Override
        public Fragment getItem(int position) {
            Crime crime = mCrimes.get(position);
            return CrimeFragment.newInstance(crime.getId());
        }

        @Override
        public int getCount() {
            return mCrimes.size();
        }
    });

    for (int i = 0; i < mCrimes.size(); i++) {
        if (mCrimes.get(i).getId().equals(crimeId)) {
            mViewPager.setCurrentItem(i);
            break;
        }
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_crime_pager);

    UUID crimeId = (UUID) getIntent()
            .getSerializableExtra(EXTRA_CRIME_ID);

    mViewPager = (ViewPager) findViewById(R.id.crime_view_pager);

    mCrimes = CrimeLab.get(this).getCrimes();
    FragmentManager fragmentManager = getSupportFragmentManager();
    mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {

        @Override
        public Fragment getItem(int position) {
            Crime crime = mCrimes.get(position);
            return CrimeFragment.newInstance(crime.getId());
        }

        @Override
        public int getCount() {
            return mCrimes.size();
        }
    });

    for (int i = 0; i < mCrimes.size(); i++) {
        if (mCrimes.get(i).getId().equals(crimeId)) {
            mViewPager.setCurrentItem(i);
            break;
        }
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_crime_pager);

    UUID crimeId = (UUID) getIntent()
            .getSerializableExtra(EXTRA_CRIME_ID);

    mViewPager = (ViewPager) findViewById(R.id.crime_view_pager);

    mCrimes = CrimeLab.get(this).getCrimes();
    FragmentManager fragmentManager = getSupportFragmentManager();
    mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {

        @Override
        public Fragment getItem(int position) {
            Crime crime = mCrimes.get(position);
            return CrimeFragment.newInstance(crime.getId());
        }

        @Override
        public int getCount() {
            return mCrimes.size();
        }
    });

    for (int i = 0; i < mCrimes.size(); i++) {
        if (mCrimes.get(i).getId().equals(crimeId)) {
            mViewPager.setCurrentItem(i);
            break;
        }
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_crime_pager);

    UUID crimeId = (UUID) getIntent()
            .getSerializableExtra(EXTRA_CRIME_ID);

    mViewPager = (ViewPager) findViewById(R.id.crime_view_pager);

    mCrimes = CrimeLab.get(this).getCrimes();
    FragmentManager fragmentManager = getSupportFragmentManager();
    mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {

        @Override
        public Fragment getItem(int position) {
            Crime crime = mCrimes.get(position);
            return CrimeFragment.newInstance(crime.getId());
        }

        @Override
        public int getCount() {
            return mCrimes.size();
        }
    });

    for (int i = 0; i < mCrimes.size(); i++) {
        if (mCrimes.get(i).getId().equals(crimeId)) {
            mViewPager.setCurrentItem(i);
            break;
        }
    }
}