Java tutorial
/************************************************************************************************** Filename: ViewPagerActivity.java Revised: $Date: 2014-01-07 16:17:34 +0100 (ti, 07 jan 2014) $ Revision: $Revision: 28784 $ Copyright 2013 Texas Instruments Incorporated. All rights reserved. IMPORTANT: Your use of this Software is limited to those specific rights granted under the terms of a software license agreement between the user who downloaded the software, his/her employer (which must be your employer) and Texas Instruments Incorporated (the "License"). You may not use this Software unless you agree to abide by the terms of the License. The License limits your use, and you acknowledge, that the Software may not be modified, copied or distributed unless used solely and exclusively in conjunction with a Texas Instruments Bluetooth device. 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Should you have any questions regarding your right to use this Software, contact Texas Instruments Incorporated at www.TI.com **************************************************************************************************/ package ti.android.ble.devicemonitor; import java.util.ArrayList; import java.util.List; import android.app.ActionBar; import android.app.Dialog; import android.app.FragmentTransaction; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentStatePagerAdapter; import android.support.v4.view.ViewPager; import android.util.Log; import android.view.MenuItem; import android.widget.ImageView; public class ViewPagerActivity extends FragmentActivity { // Constants private static final String TAG = "ViewPagerActivity"; // GUI protected static ViewPagerActivity mThis = null; protected SectionsPagerAdapter mSectionsPagerAdapter; private ViewPager mViewPager; protected int mResourceFragmentPager; protected int mResourceIdPager; private int mCurrentTab = 0; protected ViewPagerActivity() { Log.d(TAG, "construct"); mThis = this; } @Override protected void onCreate(Bundle savedInstanceState) { Log.d(TAG, "onCreate"); super.onCreate(savedInstanceState); setContentView(mResourceFragmentPager); // Set up the action bar final ActionBar actionBar = getActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); ImageView view = (ImageView) findViewById(android.R.id.home); view.setPadding(10, 0, 20, 10); // Set up the ViewPager with the sections adapter. mViewPager = (ViewPager) findViewById(mResourceIdPager); mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int n) { Log.d(TAG, "onPageSelected: " + n); actionBar.setSelectedNavigationItem(n); } }); // Create the adapter that will return a fragment for each section mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager()); // Set up the ViewPager with the sections adapter. mViewPager.setAdapter(mSectionsPagerAdapter); } @Override public void onDestroy() { Log.d(TAG, "onDestroy"); mSectionsPagerAdapter = null; super.onDestroy(); } @Override public void onBackPressed() { if (mCurrentTab != 0) getActionBar().setSelectedNavigationItem(0); else super.onBackPressed(); } @Override public boolean onOptionsItemSelected(MenuItem item) { Log.d(TAG, "onOptionsItemSelected"); // Handle presses on the action bar items switch (item.getItemId()) { // Respond to the action bar's Up/Home button case android.R.id.home: onBackPressed(); return true; default: return super.onOptionsItemSelected(item); } } protected void openAboutDialog() { final Dialog dialog = new AboutDialog(this); dialog.show(); } public class SectionsPagerAdapter extends FragmentStatePagerAdapter { private List<Fragment> mFragmentList; private List<String> mTitles; public SectionsPagerAdapter(FragmentManager fm) { super(fm); mFragmentList = new ArrayList<Fragment>(); mTitles = new ArrayList<String>(); } public void addSection(Fragment fragment, String title) { final ActionBar actionBar = getActionBar(); mFragmentList.add(fragment); mTitles.add(title); actionBar.addTab(actionBar.newTab().setText(title).setTabListener(tabListener)); notifyDataSetChanged(); Log.d(TAG, "Tab: " + title); } @Override public Fragment getItem(int position) { return mFragmentList.get(position); } @Override public int getCount() { return mTitles.size(); } @Override public CharSequence getPageTitle(int position) { if (position < getCount()) { return mTitles.get(position); } else { return null; } } } // Create a tab listener that is called when the user changes tabs. ActionBar.TabListener tabListener = new ActionBar.TabListener() { public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { int n = tab.getPosition(); Log.d(TAG, "onTabSelected: " + n); mCurrentTab = n; mViewPager.setCurrentItem(n); } public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { int n = tab.getPosition(); Log.d(TAG, "onTabUnselected: " + n); } public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { int n = tab.getPosition(); Log.d(TAG, "onTabReselected: " + n); } }; }