Java tutorial
/* * Copyright (C) 2011 The Android Open Source 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.org.icsfoodapp; import java.util.ArrayList; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.view.ViewPager; import android.view.View; import android.view.ViewGroup; import android.widget.TabHost; import android.widget.TabWidget; import android.widget.TextView; import com.fax.utils.view.TopBarContain; import com.org.icsfoodapp.fragments.OrderListFragment;; /** * Demonstrates combining a TabHost with a ViewPager to implement a tab UI * that switches between tabs and also allows the user to perform horizontal * flicks to move between the tabs. */ public class OrderTabsPagerFragmentActivity extends FragmentActivity { TabHost mTabHost; ViewPager mViewPager; TabsAdapter mTabsAdapter; View view; public static void start(Activity activity) { activity.startActivity(new Intent().setClass(activity, OrderTabsPagerFragmentActivity.class)); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); view = getLayoutInflater().inflate(R.layout.fragment_tabs_pager, null, false); TopBarContain topBarContain = new TopBarContain(this).setTitle("", R.drawable.topbar_ic_logo, 0) .setLeftBtn(R.drawable.topbar_ic_back, new View.OnClickListener() { @Override public void onClick(View v) { OrderTabsPagerFragmentActivity.this.finish(); } }).setContentView(view); setContentView(topBarContain); mTabHost = (TabHost) view.findViewById(android.R.id.tabhost); mTabHost.setup(); mViewPager = (ViewPager) view.findViewById(R.id.pager); mTabsAdapter = new TabsAdapter(this, mTabHost, mViewPager); Bundle bundle = new Bundle(); bundle.putString(String.class.getName(), MyApp.ApiUrl + "Orders/orderList"); mTabsAdapter.addTab(mTabHost.newTabSpec("NotRedeemed").setIndicator(getString(R.string.Not_Redeemed)), OrderListFragment.class, bundle); bundle = new Bundle(); bundle.putString(String.class.getName(), MyApp.ApiUrl + "Orders/hasUsed"); mTabsAdapter.addTab(mTabHost.newTabSpec("Redeemed").setIndicator(getString(R.string.Redeemed)), OrderListFragment.class, bundle); update(mTabHost); if (savedInstanceState != null) { mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab")); } } private void update(final TabHost tabHost) { for (int i = 0; i < tabHost.getTabWidget().getChildCount(); i++) { View view = tabHost.getTabWidget().getChildAt(i); TextView tv = (TextView) tabHost.getTabWidget().getChildAt(i).findViewById(android.R.id.title); //tv.setTextSize(16); tv.setTextColor(this.getResources().getColorStateList(android.R.color.white)); } } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putString("tab", mTabHost.getCurrentTabTag()); } /** * tab? */ public static class TabsAdapter extends FragmentPagerAdapter implements TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener { private final Context mContext; private final TabHost mTabHost; private final ViewPager mViewPager; private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>(); static final class TabInfo { private final String tag; private final Class<?> clss; private final Bundle args; TabInfo(String _tag, Class<?> _class, Bundle _args) { tag = _tag; clss = _class; args = _args; } } static class DummyTabFactory implements TabHost.TabContentFactory { private final Context mContext; public DummyTabFactory(Context context) { mContext = context; } @Override public View createTabContent(String tag) { View v = new View(mContext); v.setMinimumWidth(0); v.setMinimumHeight(0); return v; } } public TabsAdapter(FragmentActivity activity, TabHost tabHost, ViewPager pager) { super(activity.getSupportFragmentManager()); mContext = activity; mTabHost = tabHost; mViewPager = pager; mTabHost.setOnTabChangedListener(this); mViewPager.setAdapter(this); mViewPager.setOnPageChangeListener(this); } public void addTab(TabHost.TabSpec tabSpec, Class<?> clss, Bundle args) { tabSpec.setContent(new DummyTabFactory(mContext)); String tag = tabSpec.getTag(); TabInfo info = new TabInfo(tag, clss, args); mTabs.add(info); mTabHost.addTab(tabSpec); 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); } @Override public void onTabChanged(String tabId) { int position = mTabHost.getCurrentTab(); mViewPager.setCurrentItem(position); } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { // Unfortunately when TabHost changes the current tab, it kindly // also takes care of putting focus on it when not in touch mode. // The jerk. // This hack tries to prevent this from pulling focus out of our // ViewPager. TabWidget widget = mTabHost.getTabWidget(); int oldFocusability = widget.getDescendantFocusability(); widget.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS); mTabHost.setCurrentTab(position); widget.setDescendantFocusability(oldFocusability); } @Override public void onPageScrollStateChanged(int state) { } } }