Android Open Source - PlayTunes Search Suggestions Fragment

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License

The source code is released under:
Copyright (c) 2014, Impeccable Labs, LLC. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions ar...
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Java Source Code

package com.ideabag.playtunes.fragment.search;
//from  w  w w.  jav a  2s. co m
import com.google.android.gms.analytics.HitBuilders;
import com.google.android.gms.analytics.Tracker;
import com.google.gson.Gson;
import com.ideabag.playtunes.R;
import com.ideabag.playtunes.fragment.SaveScrollListFragment;
import com.ideabag.playtunes.util.SearchHistory;
import com.ideabag.playtunes.util.TrackerSingleton;
import com.ideabag.playtunes.util.GAEvent.Categories;
import com.ideabag.playtunes.util.GAEvent.Playlist;

import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

public class SearchSuggestionsFragment extends Fragment implements ListView.OnItemClickListener {
  
  public static final String TAG = "Search Suggestions Fragment";
  
  SearchFragment mSearchFragment;
  ListView mListView;
  
  private Button mButtonClearHistory;
  
  SharedPreferences mSharedPrefs;
  
  ArrayAdapter < String > adapter;
  String[] mSearchQueries = null;
  
  private Tracker mTracker;
  
  public SearchSuggestionsFragment() {
    
    
    
  }
  
  public SearchSuggestionsFragment( SearchFragment parentFragment ) {
    
    mSearchFragment = parentFragment;
    
  }
  
  private void loadSearchHistory() {
    
    Gson gson = new Gson();
    String searchHistoryString = mSharedPrefs.getString( getString( R.string.pref_key_search_history ), "[]" );
    
    String[] mSearchQueries = gson.fromJson( searchHistoryString, String[].class);
    
    if ( null != mSearchQueries ) {
      
      adapter = new ArrayAdapter < String >( getActivity(), R.layout.list_item_title, R.id.Title, mSearchQueries );
      mListView.setAdapter( adapter );
      
      if ( this.isResumed() ) {
        
        //restoreScrollPosition();
        
      }
      
    }
    
      if ( adapter.getCount() >= 1 ) {
        
        mButtonClearHistory.setVisibility( View.VISIBLE );
        
      } else {
        
        mButtonClearHistory.setVisibility( View.GONE );
      }
    
  }
  
  @Override public View onCreateView( LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState ) {
    
    return inflater.inflate( R.layout.fragment_search_suggestions, container, false );
    
  }
  
  @Override public void onActivityCreated( Bundle savedInstanceState ) {
    super.onActivityCreated( savedInstanceState );
    
    mSharedPrefs = getActivity().getSharedPreferences( getString( R.string.prefs_file ), Context.MODE_PRIVATE );
    mSharedPrefs.registerOnSharedPreferenceChangeListener( mPreferencesChangeListener );
    
    mListView = ( ListView ) getView().findViewById( R.id.SuggestionListView );
    mButtonClearHistory = ( Button ) getView().findViewById( R.id.ButtonClearHistory );
      
      
      mListView.setDivider( getResources().getDrawable( R.drawable.list_divider ) );
      mListView.setDividerHeight( 1 );
      
      mListView.setOnItemClickListener( this );
      
    mTracker = TrackerSingleton.getDefaultTracker( getActivity() );
    
    loadSearchHistory();
      
    mButtonClearHistory.setOnClickListener( new OnClickListener() {

      @Override public void onClick( View v ) {
        
        clearSearchHistory();
        
      }
      
    });
    
  }
  
  @Override public void onResume() {
    super.onResume();
    
    mTracker.setScreenName( TAG );
    
    mTracker.send( new HitBuilders.AppViewBuilder().build() );
    
    mTracker.send( new HitBuilders.EventBuilder()
      .setCategory( Categories.PLAYLIST )
      .setAction( Playlist.ACTION_SHOWLIST )
      .setValue( adapter.getCount() )
      .build());
    
  }
  
  @Override public void onDestroy() {
    super.onDestroy();
    
    if ( mSharedPrefs != null ) {
      
      mSharedPrefs.unregisterOnSharedPreferenceChangeListener( mPreferencesChangeListener );
      
    }
    
  }
  
  @Override public void onItemClick(AdapterView<?> list, View v, int position, long id ) {
    
    String mSearchTerm = ( String ) adapter.getItem( position );
      
    mSearchFragment.mQueryTextView.setText( mSearchTerm );
    mSearchFragment.setMediaID( mSearchTerm );
    
    mTracker.send( new HitBuilders.EventBuilder()
      .setCategory( Categories.PLAYLIST )
      .setAction( Playlist.ACTION_CLICK )
      .setValue( position )
      .build());
    
  }
  
  private void clearSearchHistory() {
    
    SearchHistory.clearHistory( getActivity() );
    adapter.notifyDataSetChanged();
    
    if ( adapter.getCount() > 0 ) {
      
      mButtonClearHistory.setVisibility( View.VISIBLE );
      
    } else {
      
      mButtonClearHistory.setVisibility( View.GONE );
      
    }
    
    mTracker.send( new HitBuilders.EventBuilder()
      .setCategory( Categories.PLAYLIST )
      .setAction( Playlist.ACTION_SHOWLIST )
      .setValue( adapter.getCount() )
      .build());
    
  }
  
  SharedPreferences.OnSharedPreferenceChangeListener mPreferencesChangeListener = new SharedPreferences.OnSharedPreferenceChangeListener() {
    
    @Override public void onSharedPreferenceChanged( SharedPreferences sharedPreferences, String key ) {
      
      if ( key.equals( getString( R.string.pref_key_search_history ) ) ) {
        
        loadSearchHistory();
        
      }
      
    }
    
  };

}
Java Source Code List
