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March 25, 2015 17:23
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package connecteddeveloper.com.helloworld; | |
import java.util.Locale; | |
import android.support.v7.app.ActionBarActivity; | |
import android.support.v7.app.ActionBar; | |
import android.support.v4.app.Fragment; | |
import android.support.v4.app.FragmentManager; | |
import android.support.v4.app.FragmentTransaction; | |
import android.support.v4.app.FragmentPagerAdapter; | |
import android.os.Bundle; | |
import android.support.v4.view.ViewPager; | |
import android.view.Gravity; | |
import android.view.LayoutInflater; | |
import android.view.Menu; | |
import android.view.MenuItem; | |
import android.view.View; | |
import android.view.ViewGroup; | |
import android.widget.TextView; | |
public class MainActivity extends ActionBarActivity { | |
/** | |
* The {@link android.support.v4.view.PagerAdapter} that will provide | |
* fragments for each of the sections. We use a | |
* {@link FragmentPagerAdapter} derivative, which will keep every | |
* loaded fragment in memory. If this becomes too memory intensive, it | |
* may be best to switch to a | |
* {@link android.support.v4.app.FragmentStatePagerAdapter}. | |
*/ | |
SectionsPagerAdapter mSectionsPagerAdapter; | |
/** | |
* The {@link ViewPager} that will host the section contents. | |
*/ | |
ViewPager mViewPager; | |
@Override | |
protected void onCreate(Bundle savedInstanceState) { | |
super.onCreate(savedInstanceState); | |
setContentView(R.layout.activity_main); | |
// Create the adapter that will return a fragment for each of the three | |
// primary sections of the activity. | |
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager()); | |
// Set up the ViewPager with the sections adapter. | |
mViewPager = (ViewPager) findViewById(R.id.pager); | |
mViewPager.setAdapter(mSectionsPagerAdapter); | |
} | |
@Override | |
public boolean onCreateOptionsMenu(Menu menu) { | |
// Inflate the menu; this adds items to the action bar if it is present. | |
getMenuInflater().inflate(R.menu.menu_main, 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(); | |
//noinspection SimplifiableIfStatement | |
if (id == R.id.action_settings) { | |
return true; | |
} | |
return super.onOptionsItemSelected(item); | |
} | |
/** | |
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to | |
* one of the sections/tabs/pages. | |
*/ | |
public class SectionsPagerAdapter extends FragmentPagerAdapter { | |
public SectionsPagerAdapter(FragmentManager fm) { | |
super(fm); | |
} | |
@Override | |
public Fragment getItem(int position) { | |
// getItem is called to instantiate the fragment for the given page. | |
// Return a PlaceholderFragment (defined as a static inner class below). | |
return PlaceholderFragment.newInstance(position + 1); | |
} | |
@Override | |
public int getCount() { | |
// Show 3 total pages. | |
return 3; | |
} | |
@Override | |
public CharSequence getPageTitle(int position) { | |
Locale l = Locale.getDefault(); | |
switch (position) { | |
case 0: | |
return getString(R.string.title_section1).toUpperCase(l); | |
case 1: | |
return getString(R.string.title_section2).toUpperCase(l); | |
case 2: | |
return getString(R.string.title_section3).toUpperCase(l); | |
} | |
return null; | |
} | |
} | |
/** | |
* A placeholder fragment containing a simple view. | |
*/ | |
public static class PlaceholderFragment extends Fragment { | |
/** | |
* The fragment argument representing the section number for this | |
* fragment. | |
*/ | |
private static final String ARG_SECTION_NUMBER = "section_number"; | |
/** | |
* Returns a new instance of this fragment for the given section | |
* number. | |
*/ | |
public static PlaceholderFragment newInstance(int sectionNumber) { | |
PlaceholderFragment fragment = new PlaceholderFragment(); | |
Bundle args = new Bundle(); | |
args.putInt(ARG_SECTION_NUMBER, sectionNumber); | |
fragment.setArguments(args); | |
return fragment; | |
} | |
public PlaceholderFragment() { | |
} | |
@Override | |
public View onCreateView(LayoutInflater inflater, ViewGroup container, | |
Bundle savedInstanceState) { | |
View rootView = inflater.inflate(R.layout.fragment_main, container, false); | |
return rootView; | |
} | |
} | |
} |
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