Java tutorial
/* * Copyright (C) 2012 The CyanogenMod Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.cyanogenmod.settings.device; import android.app.ActionBar; import android.app.ActionBar.Tab; import android.app.Activity; import android.app.Fragment; import android.app.FragmentTransaction; import android.content.Context; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.support.v13.app.FragmentPagerAdapter; import android.support.v4.view.ViewPager; import com.cyanogenmod.settings.device.R; import java.util.ArrayList; public class DeviceSettings extends FragmentActivity { public static final String SHARED_PREFERENCES_BASENAME = "com.cyanogenmod.settings.device"; public static final String ACTION_UPDATE_PREFERENCES = "com.cyanogenmod.settings.device.UPDATE"; public static final String KEY_MDNIE_SCENARIO = "mdnie_scenario"; public static final String KEY_MDNIE_MODE = "mdnie_mode"; public static final String KEY_MDNIE_NEGATIVE = "mdnie_negative"; public static final String KEY_MDNIE_OUTDOOR = "mdnie_outdoor"; public static final String KEY_PANEL_GAMMA = "panel_gamma"; public static final String KEY_USE_ACCELEROMETER_CALIBRATION = "use_accelerometer_calibration"; public static final String KEY_CALIBRATE_ACCELEROMETER = "calibrate_accelerometer"; public static final String KEY_TOUCHSCREEN_SENSITIVITY = "touchscreen_sensitivity"; public static final String KEY_TOUCHKEY_LIGHT = "touchkey_light"; public static final String KEY_TOUCHKEY_TIMEOUT = "touchkey_timeout"; public static final String KEY_VIBRATOR_INTENSITY = "vibrator_intensity"; public static final String KEY_PRIMARY_STORAGE = "primary_storage"; public static final String KEY_USE_DOCK_AUDIO = "dock_audio"; ViewPager mViewPager; TabsAdapter mTabsAdapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mViewPager = new ViewPager(this); mViewPager.setId(R.id.viewPager); setContentView(mViewPager); final ActionBar bar = getActionBar(); bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); bar.setDisplayOptions(ActionBar.DISPLAY_SHOW_TITLE, ActionBar.DISPLAY_SHOW_TITLE); bar.setTitle(R.string.app_name); mTabsAdapter = new TabsAdapter(this, mViewPager); mTabsAdapter.addTab(bar.newTab().setText(R.string.category_screen_title), ScreenFragmentActivity.class, null); mTabsAdapter.addTab(bar.newTab().setText(R.string.category_sensors_title), SensorsFragmentActivity.class, null); mTabsAdapter.addTab(bar.newTab().setText(R.string.category_haptic_title), HapticFragmentActivity.class, null); mTabsAdapter.addTab(bar.newTab().setText(R.string.category_storage_title), StorageFragmentActivity.class, null); mTabsAdapter.addTab(bar.newTab().setText(R.string.category_dock_title), DockFragmentActivity.class, null); if (savedInstanceState != null) { bar.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0)); } } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putInt("tab", getActionBar().getSelectedNavigationIndex()); } public static class TabsAdapter extends FragmentPagerAdapter implements ActionBar.TabListener, ViewPager.OnPageChangeListener { private final Context mContext; private final ActionBar mActionBar; private final ViewPager mViewPager; private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>(); static final class TabInfo { private final Class<?> clss; private final Bundle args; TabInfo(Class<?> _class, Bundle _args) { clss = _class; args = _args; } } public TabsAdapter(Activity activity, ViewPager pager) { super(activity.getFragmentManager()); mContext = activity; mActionBar = activity.getActionBar(); mViewPager = pager; mViewPager.setAdapter(this); mViewPager.setOnPageChangeListener(this); } public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) { TabInfo info = new TabInfo(clss, args); tab.setTag(info); tab.setTabListener(this); mTabs.add(info); mActionBar.addTab(tab); notifyDataSetChanged(); } @Override public int getCount() { return mTabs.size(); } @Override public Fragment getItem(int position) { TabInfo info = mTabs.get(position); return Fragment.instantiate(mContext, info.clss.getName(), info.args); } public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } public void onPageSelected(int position) { mActionBar.setSelectedNavigationItem(position); } public void onPageScrollStateChanged(int state) { } public void onTabSelected(Tab tab, FragmentTransaction ft) { Object tag = tab.getTag(); for (int i = 0; i < mTabs.size(); i++) { if (mTabs.get(i) == tag) { mViewPager.setCurrentItem(i); } } } public void onTabUnselected(Tab tab, FragmentTransaction ft) { } public void onTabReselected(Tab tab, FragmentTransaction ft) { } } }