Java tutorial
/* * Copyright (c) 2014 Jono Vanhie-Van Gerwen * * 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.github.jvanhie.discogsscrobbler; import android.content.ActivityNotFoundException; import android.content.Intent; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v4.view.MenuItemCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.widget.SearchView; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ProgressBar; import android.widget.Spinner; import android.widget.SpinnerAdapter; /** * An activity representing a list of Releases. This activity * has different presentations for handset and tablet-size devices. On * handsets, the activity presents a list of items, which when touched, * lead to a {@link com.github.jvanhie.discogsscrobbler.ReleaseDetailActivity} representing * item details. On tablets, the activity presents the list of items and * item details side-by-side using two vertical panes. * <p> * The activity makes heavy use of fragments. The list of items is a * {@link com.github.jvanhie.discogsscrobbler.ReleaseListFragment} and the item details * (if present) is a {@link com.github.jvanhie.discogsscrobbler.ReleaseDetailFragment}. * <p> * This activity also implements the required * {@link com.github.jvanhie.discogsscrobbler.ReleaseListFragment.Callbacks} interface * to listen for item selections. */ public class SearchActivity extends DrawerActivity implements SearchFragment.Callbacks, ReleaseVersionsFragment.Callbacks { /** * Whether or not the activity is in two-pane mode, i.e. running on a tablet * device. */ private int BARCODE_REQUEST_CODE = 666; private int mPanes = 1; private static final String STATE_PANES = "collection_panes"; private long mSelected; private static final String STATE_RELEASE_SELECTED = "selected_release"; private SearchFragment mSearchFragment; //all possible extra fragments in tablet mode private ReleasePagerFragment mReleasePager; private ReleaseDetailFragment mReleaseDetail; private ReleaseTracklistFragment mReleaseTracklist; private SearchView mSearchView; private ProgressBar mRefreshProgressBar; private boolean mDetailVisible = false; private int mSearchType; private String[] mSearchTypes; private static final String SEARCH_TYPE = "search_type"; private String mLastSearch; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_search); mSearchFragment = ((SearchFragment) getSupportFragmentManager().findFragmentById(R.id.search_list)); mRefreshProgressBar = (ProgressBar) findViewById(R.id.search_refresh); //check if we're in tablet mode -> two or tripane layout if (findViewById(R.id.release_pager_container) != null) { mPanes = 2; findViewById(R.id.release_pager_container).setVisibility(View.GONE); } else if (findViewById(R.id.release_tracklist_container) != null) { mPanes = 3; findViewById(R.id.release_detail_container).setVisibility(View.GONE); findViewById(R.id.release_tracklist_container).setVisibility(View.GONE); } mSearchFragment.setActivateOnItemClick(true); // Restore the previously serialized activated release if (savedInstanceState != null && savedInstanceState.containsKey(STATE_RELEASE_SELECTED)) { if (savedInstanceState.getInt(STATE_PANES) != mPanes) { //if the panelayout has changed, forcibly reload the fragments onItemSelected(savedInstanceState.getLong(STATE_RELEASE_SELECTED)); } } // set search type mSearchType = PreferenceManager.getDefaultSharedPreferences(this).getInt(SEARCH_TYPE, 0); mSearchTypes = getResources().getStringArray(R.array.search_filter_items); //create navigation drawer setDrawer(R.id.search_drawer_layout, R.id.search_drawer, getTitle().toString(), getTitle().toString(), true); } @Override public boolean onCreateOptionsMenu(final Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.discogs_search, menu); //configure search box final MenuItem search = menu.findItem(R.id.search_field); mSearchView = (SearchView) search.getActionView(); mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String s) { menu.findItem(R.id.search_field).collapseActionView(); mLastSearch = s; //pass query to search fragment if (mSearchType > 0) { mSearchFragment.search(s, mSearchTypes[mSearchType]); } else { mSearchFragment.search(s); } return false; } @Override public boolean onQueryTextChange(String s) { return false; } }); mSearchView.setOnSearchClickListener(new SearchView.OnClickListener() { @Override public void onClick(View view) { //restore last search if (mLastSearch != null) { mSearchView.setQuery(mLastSearch, false); } } }); if (mSearchType > 0) { mSearchView.setQueryHint("Search Discogs (" + mSearchTypes[mSearchType] + ")"); } else { mSearchView.setQueryHint("Search Discogs"); } //config filter spinner final MenuItem filter = menu.findItem(R.id.search_filter); Spinner s = (Spinner) filter.getActionView(); // find the spinner ArrayAdapter mSpinnerAdapter = ArrayAdapter.createFromResource(getSupportActionBar().getThemedContext(), R.array.search_filter_items, android.R.layout.simple_spinner_dropdown_item); // create the adapter from a StringArray mSpinnerAdapter.setDropDownViewResource(R.layout.spinner_dropdown_item); s.setAdapter(mSpinnerAdapter); // set the adapter s.setSelection(mSearchType, false); s.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) { mSearchType = i; PreferenceManager.getDefaultSharedPreferences(SearchActivity.this).edit() .putInt(SEARCH_TYPE, mSearchType).apply(); if (i > 0) { mSearchView.setQueryHint("Search Discogs (" + mSearchTypes[i] + ")"); } else { mSearchView.setQueryHint("Search Discogs"); } filter.collapseActionView(); search.expandActionView(); } @Override public void onNothingSelected(AdapterView<?> adapterView) { //filter.collapseActionView(); } }); //make sure only one actionview is expanded MenuItemCompat.setOnActionExpandListener(filter, new MenuItemCompat.OnActionExpandListener() { @Override public boolean onMenuItemActionExpand(MenuItem menuItem) { //collapse search search.collapseActionView(); return true; } @Override public boolean onMenuItemActionCollapse(MenuItem menuItem) { return true; } }); MenuItemCompat.setOnActionExpandListener(search, new MenuItemCompat.OnActionExpandListener() { @Override public boolean onMenuItemActionExpand(MenuItem menuItem) { //collapse filter filter.collapseActionView(); return true; } @Override public boolean onMenuItemActionCollapse(MenuItem menuItem) { return true; } }); //only expand when the drawer is closed and initial page load if (!((DrawerLayout) findViewById(R.id.search_drawer_layout)).isDrawerOpen(findViewById(R.id.search_drawer)) && !mDetailVisible) { search.expandActionView(); } if (mSelected > 0) { inflater.inflate(R.menu.release_detail_search, menu); if (PreferenceManager.getDefaultSharedPreferences(this).getBoolean("enable_lastfm", true)) { inflater.inflate(R.menu.release_detail_scrobble, menu); } } return true; } public void setRefreshVisible(boolean visible) { if (mRefreshProgressBar != null) { if (visible) { mRefreshProgressBar.setVisibility(View.VISIBLE); } else { mRefreshProgressBar.setVisibility(View.GONE); } } } @Override public boolean onPrepareOptionsMenu(Menu menu) { return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == R.id.search_barcode) { //start external barcode scanner intent try { Intent intent = new Intent("com.google.zxing.client.android.SCAN"); intent.setPackage("com.google.zxing.client.android"); intent.putExtra("SCAN_MODE", "PRODUCT_MODE"); startActivityForResult(intent, BARCODE_REQUEST_CODE); } catch (ActivityNotFoundException exc) { //TODO: give users the option to download it } } if (id == R.id.detail_scrobble_release) { //if tracklist is available, always scrobble from this view if (mPanes == 3 && mReleaseTracklist != null) { mReleaseTracklist.scrobble(); } else if (mPanes == 2 && mReleasePager != null) { mReleasePager.scrobble(); } } if (id == R.id.detail_add_to_discogs) { //if tracklist is available, always scrobble from this view if (mPanes == 3 && mReleaseTracklist != null) { mReleaseTracklist.addToDiscogs(); } else if (mPanes == 2 && mReleasePager != null) { mReleasePager.addToDiscogs(); } } return super.onOptionsItemSelected(item); } /** * Callback method from {@link com.github.jvanhie.discogsscrobbler.ReleaseListFragment.Callbacks} * indicating that the item with the given ID was selected. */ @Override public void onItemSelected(long id) { mSelected = id; invalidateOptionsMenu(); switch (mPanes) { case 1: //just start new activity with the details Intent detailIntent = new Intent(this, ReleaseDetailActivity.class); detailIntent.putExtra(ReleaseDetailFragment.ARG_ITEM_ID, id); startActivity(detailIntent); break; case 2: //show the pager fragment next to the list mDetailVisible = true; Bundle arguments2 = new Bundle(); arguments2.putLong(ReleasePagerFragment.ARG_ITEM_ID, id); arguments2.putBoolean(ReleasePagerFragment.HAS_MENU, false); mReleasePager = new ReleasePagerFragment(); mReleasePager.setArguments(arguments2); getSupportFragmentManager().beginTransaction().replace(R.id.release_pager_container, mReleasePager) .commit(); findViewById(R.id.release_pager_container).setVisibility(View.VISIBLE); break; case 3: //whoa, screen estate! Show detail view _and_ tracklist mDetailVisible = true; Bundle arguments3 = new Bundle(); arguments3.putLong(ReleasePagerFragment.ARG_ITEM_ID, id); arguments3.putBoolean(ReleasePagerFragment.SHOW_TRACKLIST, false); arguments3.putBoolean(ReleasePagerFragment.HAS_MENU, false); mReleasePager = new ReleasePagerFragment(); mReleasePager.setArguments(arguments3); Bundle arguments3_t = new Bundle(); arguments3_t.putLong(ReleaseDetailFragment.ARG_ITEM_ID, id); mReleaseTracklist = new ReleaseTracklistFragment(); mReleaseTracklist.setArguments(arguments3_t); getSupportFragmentManager().beginTransaction().replace(R.id.release_detail_container, mReleasePager) .replace(R.id.release_tracklist_container, mReleaseTracklist).commit(); findViewById(R.id.release_detail_container).setVisibility(View.VISIBLE); findViewById(R.id.release_tracklist_container).setVisibility(View.VISIBLE); break; } } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); if (mSelected > 0) { // Serialize and persist the activated item position. outState.putLong(STATE_RELEASE_SELECTED, mSelected); } outState.putInt(STATE_PANES, mPanes); } @Override //is called when the barcode scan activity returns protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (data != null && requestCode == BARCODE_REQUEST_CODE) { if (resultCode == RESULT_OK) { String barcode = data.getStringExtra("SCAN_RESULT"); if (mSearchView != null) mSearchView.setQuery(barcode, false); mSearchFragment.searchBarcode(barcode); } } super.onActivityResult(requestCode, resultCode, data); }; }