Android Open Source - PlayTunes Music Browser 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;
/* www.j a va  2  s  . co  m*/
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.ideabag.playtunes.R;
import com.ideabag.playtunes.activity.MainActivity;
import com.ideabag.playtunes.util.AdmobUtil;
import com.ideabag.playtunes.util.IMusicBrowser;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class MusicBrowserFragment extends Fragment {
  
  public static final String TAG = "MusicBrowserFragment";
  
  private static final String PREF_KEY_CLASSNAME = "class_name";
  private static final String PREF_KEY_MEDIAID = "media_id";
  
  private MainActivity mActivity;
  
  private AdView mAdView;
  
  
  
  @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    
    return inflater.inflate( R.layout.fragment_music_browser, container, false );
    
  }
  
  @Override public void onAttach( Activity activity ) {
    
    super.onAttach( activity );
    
    mActivity = ( MainActivity ) activity;
    
    //mActivity.getFragmentManager().getBackStackEntryCount()
    
  }
  
  @SuppressWarnings("unchecked")
  @Override public void onActivityCreated( Bundle savedInstanceState ) {
    
    super.onActivityCreated( savedInstanceState );
        
      mAdView = ( AdView ) getView().findViewById( R.id.adView );
      
    AdRequest.Builder adRequestBuilder = new AdRequest.Builder().addTestDevice( AdRequest.DEVICE_ID_EMULATOR );
      AdmobUtil.AddTestDevices( getActivity(), adRequestBuilder );
      
      AdRequest adRequest = adRequestBuilder.build();
    
      //getActivity().getSupportFragmentManager().findFragmentById( R.id.MusicBrowserContainer );
    // Start loading the ad in the background.
      mAdView.loadAd( adRequest );
      
      SharedPreferences prefs = getActivity().getSharedPreferences( getString( R.string.prefs_file ), Context.MODE_PRIVATE );
      //IMusicBrowser TopFragment = null;
      
      if ( prefs.contains( "class_name" ) ) {// else check if we saved it in prefs
        
        String className = prefs.getString( PREF_KEY_CLASSNAME, "" );
        String mediaID = prefs.getString( PREF_KEY_MEDIAID, null );
        
        Fragment initialFragment = null;
        
        Class < ? extends Fragment > nowPlayingFragmentClass;
        
        try {
          
        nowPlayingFragmentClass = ( Class< ? extends Fragment > ) Class.forName( className );
        
        initialFragment = nowPlayingFragmentClass.newInstance();
        
        if ( null != initialFragment ) {
          
          IMusicBrowser mBrowserFragment = ( IMusicBrowser ) initialFragment;
          
          mBrowserFragment.setMediaID( mediaID );
          
        }
        
      } catch ( ClassNotFoundException e ) {
        e.printStackTrace();
      } catch ( java.lang.InstantiationException e ) {
        e.printStackTrace();
      } catch ( IllegalAccessException e ) {
        e.printStackTrace();
      }
        
        if ( null == initialFragment ) {
          
          // Fall back to "All Songs"
          //android.util.Log.i( TAG, "Failed to instantiate... falling back to SongsFragment.");
          
          initialFragment = new SongsFragment();
          
        }
        
        FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
        transaction.replace( R.id.MusicBrowserContainer, initialFragment );
        // Don't add to back stack
        
        // Commit the transaction
        transaction.commit();
        
        
        
      } else {
        
        SongsFragment initialFragment = new SongsFragment();
        
        FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
        transaction.replace( R.id.MusicBrowserContainer, initialFragment );
        // Don't add to back stack
        
        // Commit the transaction
        transaction.commit();
        
      }
      
      
  }
  
  @Override public void onResume() {
    super.onResume();
    
    mAdView.resume();
    
  }
  
  @Override public void onPause() {
    
    mAdView.pause();
    
    super.onPause();
    
    // Save current showing state
    
  }
  
  @Override public void onStop() {
    super.onStop();
    
    SharedPreferences prefs = getActivity().getSharedPreferences( getString( R.string.prefs_file ), Context.MODE_PRIVATE );
    SharedPreferences.Editor edit = prefs.edit();
    //android.util.Log.i( TAG, "Class name: " + TopFragment.getClass().getName() );
    
    IMusicBrowser TopFragment = ( IMusicBrowser ) getActivity().getSupportFragmentManager().findFragmentById( R.id.MusicBrowserContainer );
    
    edit.putString( PREF_KEY_CLASSNAME, TopFragment.getClass().getName() );
    edit.putString( PREF_KEY_MEDIAID, TopFragment.getMediaID() );
    
    edit.commit();
    
  }
  
  @Override public void onDestroy() {
    super.onDestroy();
    
    mAdView.destroy();
    
    
  }
  
  
  public void showNowPlaying() {
    
    Class < ? extends Fragment > nowPlayingFragmentClass = null;
    
    String nowPlayingMediaID = null;
    
    
    try {
      
      nowPlayingFragmentClass = mActivity.mBoundService.mPlaylistFragmentClass;
      nowPlayingMediaID = mActivity.mBoundService.mPlaylistMediaID;
      
      // 
      // Check to see if the currently playing Fragment is already showing
      // only create the new fragment if it isn't already showing.
      //
      IMusicBrowser TopFragment = ( IMusicBrowser ) getActivity().getSupportFragmentManager().findFragmentById( R.id.MusicBrowserContainer );
      
      if ( TopFragment != null ) {
        
        String showingMediaID = ( ( IMusicBrowser ) TopFragment ).getMediaID();
        
        boolean isSameClass = TopFragment.getClass().equals( nowPlayingFragmentClass );
        
        boolean isSameMediaID = showingMediaID.equals( nowPlayingMediaID );
        
        if ( !( isSameClass && isSameMediaID ) ) {
          
          Fragment nowPlayingFragment;
          
          nowPlayingFragment = nowPlayingFragmentClass.newInstance();
          ( ( IMusicBrowser ) nowPlayingFragment ).setMediaID( nowPlayingMediaID );
          
          FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
            
            // Replace whatever is in the fragment_container view with this fragment,
            // and add the transaction to the back stack
            transaction.replace( R.id.MusicBrowserContainer, nowPlayingFragment );
            transaction.addToBackStack( null );
            
            
            // Commit the transaction
            transaction.commitAllowingStateLoss();
          
        }
        
      }
      

        
    } catch ( java.lang.InstantiationException e ) {
      e.printStackTrace();
    } catch ( IllegalAccessException e ) {
      e.printStackTrace();
    } catch ( ClassCastException e ) {
      e.printStackTrace();
    } catch( NullPointerException e ) {
      
      e.printStackTrace();
      
    }
    
  }
  
    public void transactFragment( Fragment newFragment ) {
      
    // 
    // Check to see if the currently playing Fragment is already showing
    // only create the new fragment if it isn't already showing.
    //
      IMusicBrowser TopFragment = ( IMusicBrowser ) getActivity().getSupportFragmentManager().findFragmentById( R.id.MusicBrowserContainer );
    
    if ( TopFragment != null ) {
      
      String showingMediaID = TopFragment.getMediaID();
      
      boolean isSameClass = TopFragment.getClass().equals( newFragment.getClass() );
      
      boolean isSameMediaID = showingMediaID != null && showingMediaID.equals( ((IMusicBrowser)newFragment).getMediaID() );
      
      if ( !( isSameClass && isSameMediaID ) ) {
        
          FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
          TopFragment = (IMusicBrowser) newFragment;
          // Replace whatever is in the fragment_container view with this fragment,
          // and add the transaction to the back stack
          transaction.replace( R.id.MusicBrowserContainer, newFragment );
          transaction.addToBackStack( null );
          
          
          // Commit the transaction
          transaction.commit();
        
      }
      
    } else {
      
        FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
        TopFragment = (IMusicBrowser) newFragment;
        // Replace whatever is in the fragment_container view with this fragment,
        // and add the transaction to the back stack
        transaction.replace( R.id.MusicBrowserContainer, newFragment );
        transaction.addToBackStack( null );
        
        
        // Commit the transaction
        transaction.commit();
      
    }
    
    mActivity.NavigationFragment.hideNavigation();
      
    }
    
}
Java Source Code List
