Java tutorial
/* * Copyright (C) 2013 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 al.laefapp.main; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.SharedPreferences; import android.os.Bundle; import android.support.v4.app.FragmentTransaction; import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBarActivity; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import java.io.File; import al.laefapp.database.ParticipantContract; import framework.ExcelLoader; import framework.FileChooser; /** * Created by ?sta Lovisa. * * This is the Main Activity class that extends ActionBar Activity. * It createes an actionbar with three tabs, each it's own fragment */ public class MainActivity extends ActionBarActivity implements ActionBar.TabListener, FileChooser.FileSelectedListener { String m_filterItem = null; CountryFragment countryFragment; OrganisationFragment organisationFragment; NameFragment nameFragment; public static final String PREFS_NAME = "LaefAPP"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(al.laefapp.main.R.layout.mainactivity); SharedPreferences settings = getSharedPreferences(PREFS_NAME, 0); boolean dialogShown = settings.getBoolean("dialogShown", false); if (!dialogShown) { FileChooser fileChooser = new FileChooser(this).setFileListener(this); fileChooser.showDialog(); SharedPreferences.Editor editor = settings.edit(); editor.putBoolean("dialogShown", true); editor.commit(); } // Set the Action Bar to use tabs for navigation ActionBar ab = getSupportActionBar(); ab.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); // Add three tabs to the Action Bar for display ab.addTab(ab.newTab().setText("Country").setTabListener(this)); ab.addTab(ab.newTab().setText("Organisation").setTabListener(this)); ab.addTab(ab.newTab().setText("Name").setTabListener(this)); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate menu from menu resource (res/menu/main) getMenuInflater().inflate(al.laefapp.main.R.menu.main, menu); return super.onCreateOptionsMenu(menu); } public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_load: FileChooser fileChooser = new FileChooser(this).setFileListener(this); fileChooser.showDialog(); return true; case R.id.menu_delete: new AlertDialog.Builder(this).setTitle("Delete Database") .setMessage("Are you sure you want to delete the database?") .setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }).setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { deleteCurrentDatabase(); dialog.dismiss(); } }).show(); return true; default: return false; } } // Implemented from ActionBar.TabListener @Override public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { // This is called when a tab is selected. switch (tab.getPosition()) { case 0: countryFragment = new CountryFragment(); setFilterItem(null); getSupportFragmentManager().beginTransaction().replace(al.laefapp.main.R.id.container, countryFragment) .commit(); Log.d("MainActivity", "onTabSelect country"); break; case 1: organisationFragment = new OrganisationFragment(); organisationFragment.setArguments(createQueryBundle()); getSupportFragmentManager().beginTransaction() .replace(al.laefapp.main.R.id.container, organisationFragment).commit(); Log.d("MainActivity", "onTabSelect organisation"); break; case 2: nameFragment = new NameFragment(); nameFragment.setArguments(createQueryBundle()); getSupportFragmentManager().beginTransaction().replace(al.laefapp.main.R.id.container, nameFragment) .commit(); Log.d("MainActivity", "onTabSelect name"); break; default: break; } } // Implemented from ActionBar.TabListener @Override public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { // This is called when a previously selected tab is unselected. //setFilterItem(null); switch (tab.getPosition()) { case 0: getSupportFragmentManager().beginTransaction().remove(countryFragment).commit(); Log.d("MainActivity", "onTabUnSelect country"); break; case 1: getSupportFragmentManager().beginTransaction().remove(organisationFragment).commit(); Log.d("MainActivity", "onTabUnSelect organisation"); break; case 2: getSupportFragmentManager().beginTransaction().remove(nameFragment).commit(); Log.d("MainActivity", "onTabUnSelect name"); setFilterItem(null); break; default: break; } } // Implemented from ActionBar.TabListener @Override public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { // This is called when a previously selected tab is selected again. Log.d("MainActivity", "onTabReselect"); } public String getFilterItem() { return m_filterItem; } public void setFilterItem(String filterItem) { m_filterItem = filterItem; } private Bundle createQueryBundle() { if (m_filterItem != null) { Bundle returnBundle = new Bundle(); returnBundle.putStringArray("filterid", new String[] { m_filterItem }); return returnBundle; } return null; } @Override public void fileSelected(File file) { deleteCurrentDatabase(); String filename = file.getPath(); Log.d("MainActivity", filename); ExcelLoader excelLoader = new ExcelLoader(filename); excelLoader.loadFile(getApplicationContext()); } private void deleteCurrentDatabase() { try { getContentResolver().delete(ParticipantContract.Countries.CONTENT_URI, null, null); getContentResolver().delete(ParticipantContract.Organisation.CONTENT_URI, null, null); getContentResolver().delete(ParticipantContract.Names.CONTENT_URI, null, null); } catch (Exception e) { Log.e("Delete Database failed", e.toString()); } } }