Java tutorial
/* Copyright (c) 2013 Darshan-Josiah Barber This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. */ package com.darshancomputing.BatteryIndicator; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.content.SharedPreferences; import android.os.Bundle; import android.util.Log; import android.view.KeyEvent; 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.support.v4.view.PagerTabStrip; import android.support.v4.view.ViewPager; public class BatteryInfoActivity extends FragmentActivity { private BatteryInfoPagerAdapter pagerAdapter; private ViewPager viewPager; public static CurrentInfoFragment currentInfoFragment; private long startMillis; public Context context; public Resources res; public Str str; public SharedPreferences settings; public SharedPreferences sp_store; private static final String LOG_TAG = "BatteryBot"; //static { //android.os.Debug.startMethodTracing(); //} @Override public void onCreate(Bundle savedInstanceState) { startMillis = System.currentTimeMillis(); context = getApplicationContext(); res = getResources(); str = new Str(res); loadSettingsFiles(); // Stranglely disabled by default for API level 14+ if (android.os.Build.VERSION.SDK_INT >= 14) { getActionBar().setHomeButtonEnabled(true); getActionBar().setDisplayShowHomeEnabled(true); } super.onCreate(savedInstanceState); // Recreates Fragments, so only call after doing necessary setup setContentView(R.layout.battery_info); pagerAdapter = new BatteryInfoPagerAdapter(getSupportFragmentManager()); viewPager = (ViewPager) findViewById(R.id.pager); viewPager.setAdapter(pagerAdapter); PagerTabStrip tabStrip = (PagerTabStrip) findViewById(R.id.pager_tab_strip); tabStrip.setTabIndicatorColor(0x33b5e5); viewPager.setCurrentItem(0); } public void loadSettingsFiles() { settings = context.getSharedPreferences(SettingsActivity.SETTINGS_FILE, Context.MODE_MULTI_PROCESS); sp_store = context.getSharedPreferences(SettingsActivity.SP_STORE_FILE, Context.MODE_MULTI_PROCESS); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK && viewPager.getCurrentItem() != 0) { viewPager.setCurrentItem(0); return true; } return super.onKeyDown(keyCode, event); } public class BatteryInfoPagerAdapter extends FragmentPagerAdapter { public BatteryInfoPagerAdapter(FragmentManager fm) { super(fm); } @Override public int getCount() { return 1; // TODO } // TODO: Put Fragment types and page titles in Arrays or Map or something. @Override public Fragment getItem(int position) { if (currentInfoFragment == null) currentInfoFragment = new CurrentInfoFragment(); return currentInfoFragment; } @Override public CharSequence getPageTitle(int position) { return res.getString(R.string.tab_current_info).toUpperCase(); } } }