Java tutorial
// Created by David Brodsky // Copyright (c) 2013 OpenWatch FPC. All rights reserved. // // This file is part of ACLU-AZ-Android. // // ACLU-AZ-Android 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. // // ACLU-AZ-Android 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. // // You should have received a copy of the GNU General Public License // along with ACLU-AZ-Android. If not, see <http://www.gnu.org/licenses/>. package net.openwatch.acluaz; /* * 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. */ import android.app.AlertDialog; import android.app.AlertDialog.Builder; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.DialogInterface.OnClickListener; import android.location.Location; 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.app.NavUtils; import android.support.v4.view.ViewPager; import android.util.Log; import android.view.Display; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.LinearLayout; import android.widget.TabHost; import android.widget.TabWidget; import android.widget.TextView; import java.util.ArrayList; import java.util.List; import org.json.JSONException; import org.json.JSONObject; import com.actionbarsherlock.app.SherlockFragmentActivity; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuItem; import net.openwatch.acluaz.constants.Constants; import net.openwatch.acluaz.fragment.FormFragment; import net.openwatch.acluaz.fragment.IncidentFormFragment; import net.openwatch.acluaz.fragment.PersonalFormFragment; import net.openwatch.acluaz.http.OWServiceRequests; import net.openwatch.acluaz.location.DeviceLocation; import net.openwatch.acluaz.location.DeviceLocation.LocationResult; import net.openwatch.acluaz.sharedpreferences.SharedPreferencesManager; /** * 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 FormFragmentActivity extends SherlockFragmentActivity { private static final String TAG = "FormFragmentActivity"; TabHost mTabHost; ViewPager mViewPager; TabsAdapter mTabsAdapter; LayoutInflater inflater; public static int display_width = -1; private boolean did_submit = false; // if this is false, save incident data to prefs private ArrayList<FormFragment> attached_fragments = new ArrayList<FormFragment>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.fragment_tabs_pager); // Show the Up button in the action bar. this.getSupportActionBar().setDisplayHomeAsUpEnabled(true); getDisplayWidth(); mTabHost = (TabHost) findViewById(android.R.id.tabhost); mTabHost.setup(); mViewPager = (ViewPager) findViewById(R.id.pager); mTabsAdapter = new TabsAdapter(this, mTabHost, mViewPager); inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); mTabsAdapter.addTab(mTabHost.newTabSpec(getString(R.string.personal_tab)).setIndicator( inflateCustomTab(getString(R.string.personal_tab))), PersonalFormFragment.class, null); mTabsAdapter.addTab(mTabHost.newTabSpec(getString(R.string.incident_tab)).setIndicator( inflateCustomTab(getString(R.string.incident_tab))), IncidentFormFragment.class, null); /* mTabsAdapter.addTab(mTabHost.newTabSpec(getString(R.string.personal_tab)).setIndicator(inflateCustomTab(getString(R.string.personal_tab))), PersonalFormFragment.class, null); mTabsAdapter.addTab(mTabHost.newTabSpec(getString(R.string.event_tab)).setIndicator(inflateCustomTab(getString(R.string.event_tab))), RemoteFeedFragmentActivity.RemoteRecordingsListFragment.class, null); */ if (savedInstanceState != null) { mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab")); } DeviceLocation location = new DeviceLocation(); location.getLocation(getApplicationContext(), new LocationResult() { @Override public void gotLocation(Location location) { if (FormFragmentActivity.this != null && FormFragmentActivity.this.findViewById(R.id.gps_toggle) != null) { FormFragmentActivity.this.findViewById(R.id.gps_toggle).setTag(R.id.view_tag, location); //Log.i(TAG, "Tagged location_input with : " + FormFragmentActivity.this.findViewById(R.id.gps_toggle).getTag(R.id.view_tag).toString()); } } }, true); Intent i = getIntent(); if (!i.hasExtra(Constants.INTERNAL_DB_ID)) { AlertDialog.Builder builder = new AlertDialog.Builder(FormFragmentActivity.this); builder.setMessage(getString(R.string.pre_form_disclaimer)) .setPositiveButton(getString(R.string.dialog_ok), new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }).show(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getSupportMenuInflater().inflate(R.menu.activity_form, menu); return true; } @Override public boolean onPrepareOptionsMenu(Menu menu) { if (this.getIntent().hasExtra(Constants.INTERNAL_DB_ID)) { //menu.removeItem(R.id.menu_clear_personal); if (menu.findItem(R.id.menu_submit_form) != null) menu.findItem(R.id.menu_submit_form).setTitle(R.string.menu_amend_form); } return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { /* case R.id.menu_clear_personal: AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle(getString(R.string.clear_personal_info_dialog_title)) .setMessage(getString(R.string.clear_personal_info_dialog_msg)) .setPositiveButton(getString(R.string.clear_personal_info_ok_btn), new OnClickListener(){ @Override public void onClick(DialogInterface dialog, int which) { SharedPreferencesManager.clearPrefsAndForm(FormFragmentActivity.this, getPersonalFormFragment(), Constants.PERSONAL_PREFS); dialog.dismiss(); } }).setNegativeButton(getString(R.string.clear_personal_info_cancel_btn), new OnClickListener(){ @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }).show(); break; */ case R.id.menu_submit_form: if (!validateFormFragments()) { showFormIncompleteDialog(); break; } AlertDialog.Builder builder = new AlertDialog.Builder(FormFragmentActivity.this); builder.setMessage(getString(R.string.form_disclaimer)) .setPositiveButton(getString(R.string.dialog_submit), new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { FormFragmentActivity.this.saveAndSendForm(); } }).setNegativeButton(getString(R.string.dialog_cancel), new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }).show(); break; case android.R.id.home: NavUtils.navigateUpFromSameTask(this); break; } return true; } private void saveAndSendForm() { JSONObject json = new JSONObject(); JSONObject user_json = new JSONObject(); JSONObject report_json = new JSONObject(); attached_fragments.get(0).toJson((ViewGroup) this.findViewById(R.id.personal_form_container), user_json); attached_fragments.get(1).toJson((ViewGroup) this.findViewById(R.id.incident_form_container), report_json); try { json.put(getString(R.string.user_tag), user_json); json.put(getString(R.string.report_tag), report_json); Log.i(TAG, "pre json to Database: " + json.toString()); if (this.getIntent().hasExtra(Constants.INTERNAL_DB_ID)) { FormFragment.updateIncidentInDatabase(getApplicationContext(), json, this.getIntent().getExtras().getInt(Constants.INTERNAL_DB_ID)); json = FormFragment.addUuidToJson(getApplicationContext(), json, this.getIntent().getExtras().getInt(Constants.INTERNAL_DB_ID)); OWServiceRequests.postReport(getApplicationContext(), json, this.getIntent().getExtras().getInt(Constants.INTERNAL_DB_ID)); } else { int db_id = FormFragment.insertIncidentInDatabase(getApplicationContext(), json); json = FormFragment.addUuidToJson(getApplicationContext(), json, db_id); OWServiceRequests.postReport(getApplicationContext(), json, db_id); } did_submit = true; Intent i = new Intent(this, MainActivity.class); startActivity(i); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } } private boolean validateFormFragments() { for (int x = 0; x < attached_fragments.size(); x++) { if (!attached_fragments.get(x).validateForm(attached_fragments.get(x).getFormContainer())) return false; } return true; } private FormFragment getPersonalFormFragment() { //TODO: Do this better if (attached_fragments.size() == 2) return attached_fragments.get(0); return null; } private FormFragment getIncidentFormFragment() { //TODO: Do this better if (attached_fragments.size() == 2) return attached_fragments.get(1); return null; } public void onAttachFragment(Fragment fragment) { if (FormFragment.class.isInstance(fragment)) attached_fragments.add((FormFragment) fragment); } private void showFormIncompleteDialog() { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle(getString(R.string.form_incomplete_dialog_title)) .setMessage(getString(R.string.form_incomplete_dialog_msg)) .setPositiveButton(getString(R.string.dialog_ok), new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }).show(); } @Override public void onPause() { Log.i(TAG, "onPause"); Intent i = this.getIntent(); // If we did not submit the form AND this is a new report (not saved in database) // save the incident form to prefs if (!did_submit && !i.hasExtra(Constants.INTERNAL_DB_ID)) { // save incident prefs FormFragment incidentFrag = this.getIncidentFormFragment(); try { incidentFrag.writeJsonToPrefs(Constants.INCIDENT_PREFS, incidentFrag.toJson( (ViewGroup) incidentFrag.getView().findViewById(R.id.incident_form_container), null)); } catch (NullPointerException e) { } } super.onPause(); } private View inflateCustomTab(String tab_title) { ViewGroup tab = (ViewGroup) inflater.inflate(R.layout.tab_indicator, (ViewGroup) this.findViewById(android.R.id.tabs), false); ((TextView) tab.findViewById(R.id.title)).setText(tab_title); return tab; } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putString("tab", mTabHost.getCurrentTabTag()); } /** * This is a helper class that implements the management of tabs and all * details of connecting a ViewPager with associated TabHost. It relies on a * trick. Normally a tab host has a simple API for supplying a View or * Intent that each tab will show. This is not sufficient for switching * between pages. So instead we make the content part of the tab host * 0dp high (it is not shown) and the TabsAdapter supplies its own dummy * view to show as the tab content. It listens to changes in tabs, and takes * care of switch to the correct paged in the ViewPager whenever the selected * tab changes. */ 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) { } } /** * Measure display width so the view pager can implement its * custom behavior re: paging on the map view */ private void getDisplayWidth() { Display display = getWindowManager().getDefaultDisplay(); display_width = display.getWidth(); } }