Java tutorial
/* * Copyright 2012 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.hackathon.app.activities; import android.app.ActionBar; import android.app.FragmentTransaction; 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.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.view.ViewPager; import com.example.com.hackathon.app.R; import com.hackathon.app.application.MyApplication; import com.hackathon.app.fragments.LocalCandidateFragment; import com.hackathon.app.fragments.PmCandidateFragment; import com.hackathon.app.interfaces.onCandidateSelectListener; import com.hackathon.app.utils.Candidate; public class MainActivity extends FragmentActivity implements ActionBar.TabListener, onCandidateSelectListener { /** * The {@link android.support.v4.view.PagerAdapter} that will provide * fragments for each of the three primary sections of the app. We use a * {@link android.support.v4.app.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}. */ AppSectionsPagerAdapter mAppSectionsPagerAdapter; /** * The {@link ViewPager} that will display the three primary sections of the * app, one at a time. */ ViewPager mViewPager; public 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 app. mAppSectionsPagerAdapter = new AppSectionsPagerAdapter(getSupportFragmentManager()); // Set up the action bar. final ActionBar actionBar = getActionBar(); // Specify that the Home/Up button should not be enabled, since there is // no hierarchical // parent. actionBar.setHomeButtonEnabled(false); // Specify that we will be displaying tabs in the action bar. actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); // Set up the ViewPager, attaching the adapter and setting up a listener // for when the // user swipes between sections. mViewPager = (ViewPager) findViewById(R.id.pager); mViewPager.setAdapter(mAppSectionsPagerAdapter); mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { // When swiping between different app sections, select // the corresponding tab. // We can also use ActionBar.Tab#select() to do this if // we have a reference to the // Tab. actionBar.setSelectedNavigationItem(position); } }); // For each of the sections in the app, add a tab to the action bar. for (int i = 0; i < mAppSectionsPagerAdapter.getCount(); i++) { // Create a tab with text corresponding to the page title defined by // the adapter. // Also specify this Activity object, which implements the // TabListener interface, as the // listener for when this tab is selected. actionBar.addTab( actionBar.newTab().setText(mAppSectionsPagerAdapter.getPageTitle(i)).setTabListener(this)); } } @Override public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } @Override public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { // When the given tab is selected, switch to the corresponding page in // the ViewPager. mViewPager.setCurrentItem(tab.getPosition()); } @Override public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } /** * A {@link FragmentPagerAdapter} that returns a fragment corresponding to * one of the primary sections of the app. */ public static class AppSectionsPagerAdapter extends FragmentPagerAdapter { public AppSectionsPagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int i) { switch (i) { case 0: return new PmCandidateFragment(); case 1: return new LocalCandidateFragment(); default: // The other sections of the app are dummy placeholders. // Fragment fragment = new DummySectionFragment(); // Bundle args = new Bundle(); // args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, i + 1); // fragment.setArguments(args); // return fragment; } return null; } @Override public int getCount() { return 2; } @Override public CharSequence getPageTitle(int position) { switch (position) { case 0: return "National"; case 1: return "Local"; default: return null;// return "Section " + (position + 1); } } } @Override public void onCandidateSelected(Candidate cn) { // TODO Auto-generated method stub Intent in = new Intent(this, DetailActivity.class); in.putExtra("name", cn.getmName()); in.putExtra("party", cn.getmParty()); in.putExtra("image", cn.getImagePath()); //in.putExtra("", value) startActivity(in); } /** * A fragment that launches other parts of the demo application. */ // public static class LaunchpadSectionFragment extends Fragment { // // @Override // public View onCreateView(LayoutInflater inflater, ViewGroup container, // Bundle savedInstanceState) { // View rootView = inflater.inflate(R.layout.fragment_section_launchpad, // container, false); // // // Demonstration of a collection-browsing activity. // rootView.findViewById(R.id.demo_collection_button) // .setOnClickListener(new View.OnClickListener() { // @Override // public void onClick(View view) { // Intent intent = new Intent(getActivity(), CollectionDemoActivity.class); // startActivity(intent); // } // }); // // // Demonstration of navigating to external activities. // rootView.findViewById(R.id.demo_external_activity) // .setOnClickListener(new View.OnClickListener() { // @Override // public void onClick(View view) { // // Create an intent that asks the user to pick a photo, but using // // FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET, ensures that relaunching // // the application from the device home screen does not return // // to the external activity. // Intent externalActivityIntent = new Intent(Intent.ACTION_PICK); // externalActivityIntent.setType("image/*"); // externalActivityIntent.addFlags( // Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); // startActivity(externalActivityIntent); // } // }); // // return rootView; // } // } // // /** // * A dummy fragment representing a section of the app, but that simply // displays dummy text. // */ // public static class DummySectionFragment extends Fragment { // // public static final String ARG_SECTION_NUMBER = "section_number"; // // @Override // public View onCreateView(LayoutInflater inflater, ViewGroup container, // Bundle savedInstanceState) { // View rootView = inflater.inflate(R.layout.fragment_section_dummy, // container, false); // Bundle args = getArguments(); // ((TextView) rootView.findViewById(android.R.id.text1)).setText( // getString(R.string.dummy_section_text, args.getInt(ARG_SECTION_NUMBER))); // return rootView; // } // } }