src/com/android/music/TrackBrowserActivity.java - platform/packages/apps/Music - Git at Google

 /*
  * Copyright (C) 2007 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 com.android.music;

 import android.app.Activity;
 import android.app.ListActivity;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.graphics.Color;
 import android.graphics.drawable.Drawable;
 import android.media.AudioManager;
 import android.media.MediaDescription;
 import android.media.MediaMetadata;
 import android.media.browse.MediaBrowser;
 import android.media.session.MediaController;
 import android.media.session.MediaSession;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.Window;
 import android.widget.*;
 import com.android.music.utils.LogHelper;
 import com.android.music.utils.MediaIDHelper;

 import java.util.ArrayList;
 import java.util.List;

 /*
 This activity shows when there is a need for
  1. Songs tab [withtab = true]
  2. Browse songs within an album [withtab = false]
  3. Browse songs within a playlist [withtab = false]
  4. Browse songs within now playing queue [withtab = false]
  */
 public class TrackBrowserActivity extends ListActivity {
     private static final String TAG = LogHelper.makeLogTag(TrackBrowserActivity.class);
     private static final MediaBrowser.MediaItem DEFAULT_PARENT_ITEM =
             new MediaBrowser.MediaItem(new MediaDescription.Builder()
                                                .setMediaId(MediaIDHelper.MEDIA_ID_MUSICS_BY_SONG)
                                                .setTitle("Songs")
                                                .build(),
                     MediaBrowser.MediaItem.FLAG_BROWSABLE);

     // Underlining ListView of this Activity
     private ListView mTrackList;
     // The mediaId to be used for subscribing for children using the MediaBrowser.
     private MediaBrowser.MediaItem mParentItem;
     private MediaBrowser mMediaBrowser;
     private TrackBrowseAdapter mBrowseListAdapter;
     private boolean mWithTabs;

     /**
      * Called when the activity is first created.
      */
     @Override
     public void onCreate(Bundle icicle) {
         Log.d(TAG, "onCreate()");
         super.onCreate(icicle);
         // Process past states
         Intent intent = getIntent();
         if (icicle != null) {
             LogHelper.d(TAG, "Launch by saved instance state");
             mParentItem = icicle.getParcelable(MusicUtils.TAG_PARENT_ITEM);
             mWithTabs = icicle.getBoolean(MusicUtils.TAG_WITH_TABS);
             MusicUtils.updateNowPlaying(this);
         } else if (intent != null) {
             LogHelper.d(TAG, "Launch by intent");
             mParentItem = intent.getParcelableExtra(MusicUtils.TAG_PARENT_ITEM);
             mWithTabs = intent.getBooleanExtra(MusicUtils.TAG_WITH_TABS, false);
         }
         if (mParentItem == null) {
             LogHelper.d(TAG, "Launch by default parameters");
             mParentItem = DEFAULT_PARENT_ITEM;
             mWithTabs = true;
         }
         if (mWithTabs) {
             requestWindowFeature(Window.FEATURE_NO_TITLE);
         }
         setTitle(mParentItem.getDescription().getTitle());
         setVolumeControlStream(AudioManager.STREAM_MUSIC);

         // Init layout
         LogHelper.d(TAG, "init layout");
         setContentView(R.layout.media_picker_activity);
         MusicUtils.updateButtonBar(this, R.id.songtab);

         // Init the ListView
         Log.d(TAG, "Creating ListView");
         mTrackList = getListView();
         mTrackList.setCacheColorHint(0);
         mTrackList.setTextFilterEnabled(true);
         mBrowseListAdapter = (TrackBrowseAdapter) getLastNonConfigurationInstance();
         if (mBrowseListAdapter == null) {
             mBrowseListAdapter = new TrackBrowseAdapter(this, R.layout.track_list_item);
         }
         setListAdapter(mBrowseListAdapter);
         // don't set the album art until after the view has been layed out
         mTrackList.post(new Runnable() {
             public void run() {
                 mTrackList.setBackgroundColor(Color.WHITE);
                 mTrackList.setCacheColorHint(0);
             }
         });

         // Create media browser
         Log.d(TAG, "Creating MediaBrowser");
         mMediaBrowser = new MediaBrowser(this, new ComponentName(this, MediaPlaybackService.class),
                 mConnectionCallback, null);
     }

     @Override
     public void onStart() {
         Log.d(TAG, "onStart()");
         super.onStart();
         mMediaBrowser.connect();
     }

     @Override
     public void onStop() {
         Log.d(TAG, "onStop()");
         super.onStop();
         mMediaBrowser.disconnect();
     }

     @Override
     public void onDestroy() {
         Log.d(TAG, "onDestroy()");
         ListView lv = getListView();
         // Because we pass the adapter to the next activity, we need to make
         // sure it doesn't keep a reference to this activity. We can do this
         // by clearing its DatasetObservers, which setListAdapter(null) does.
         setListAdapter(null);
         mBrowseListAdapter = null;
         super.onDestroy();
     }

     @Override
     public void onResume() {
         Log.d(TAG, "onResume()");
         super.onResume();
     }

     @Override
     public void onPause() {
         Log.d(TAG, "onPause()");
         super.onPause();
     }

     @Override
     public void onSaveInstanceState(Bundle outcicle) {
         outcicle.putParcelable(MusicUtils.TAG_PARENT_ITEM, mParentItem);
         outcicle.putBoolean(MusicUtils.TAG_WITH_TABS, mWithTabs);
         super.onSaveInstanceState(outcicle);
     }

     private MediaBrowser.SubscriptionCallback mSubscriptionCallback =
             new MediaBrowser.SubscriptionCallback() {

                 @Override
                 public void onChildrenLoaded(
                         String parentId, List<MediaBrowser.MediaItem> children) {
                     mBrowseListAdapter.clear();
                     mBrowseListAdapter.notifyDataSetInvalidated();
                     for (MediaBrowser.MediaItem item : children) {
                         mBrowseListAdapter.add(item);
                     }
                     mBrowseListAdapter.notifyDataSetChanged();
                 }

                 @Override
                 public void onError(String id) {
                     Toast.makeText(getApplicationContext(), R.string.error_loading_media,
                                  Toast.LENGTH_LONG)
                             .show();
                 }
             };

     private MediaBrowser.ConnectionCallback mConnectionCallback =
             new MediaBrowser.ConnectionCallback() {
                 @Override
                 public void onConnected() {
                     Log.d(TAG, "onConnected: session token " + mMediaBrowser.getSessionToken());
                     mMediaBrowser.subscribe(mParentItem.getMediaId(), mSubscriptionCallback);
                     if (mMediaBrowser.getSessionToken() == null) {
                         throw new IllegalArgumentException("No Session token");
                     }
                     MediaController mediaController = new MediaController(
                             TrackBrowserActivity.this, mMediaBrowser.getSessionToken());
                     mediaController.registerCallback(mMediaControllerCallback);
                     TrackBrowserActivity.this.setMediaController(mediaController);
                     if (mediaController.getMetadata() != null && mWithTabs) {
                         MusicUtils.updateNowPlaying(TrackBrowserActivity.this);
                     }
                 }

                 @Override
                 public void onConnectionFailed() {
                     Log.d(TAG, "onConnectionFailed");
                 }

                 @Override
                 public void onConnectionSuspended() {
                     Log.d(TAG, "onConnectionSuspended");
                     TrackBrowserActivity.this.setMediaController(null);
                 }
             };

     private MediaController.Callback mMediaControllerCallback = new MediaController.Callback() {
         @Override
         public void onMetadataChanged(MediaMetadata metadata) {
             super.onMetadataChanged(metadata);
             if (mWithTabs) {
                 MusicUtils.updateNowPlaying(TrackBrowserActivity.this);
             }
             if (mBrowseListAdapter != null) {
                 mBrowseListAdapter.notifyDataSetChanged();
             }
         }
     };

     // An adapter for showing the list of browsed MediaItem's
     private static class TrackBrowseAdapter extends ArrayAdapter<MediaBrowser.MediaItem> {
         private int mLayoutId;
         private final Drawable mNowPlayingOverlay;
         private Activity mActivity;

         static class ViewHolder {
             TextView line1;
             TextView line2;
             TextView duration;
             ImageView play_indicator;
         }

         TrackBrowseAdapter(Activity activity, int layout) {
             super(activity, layout, new ArrayList<>());
             mLayoutId = layout;
             mNowPlayingOverlay = activity.getResources().getDrawable(
                     R.drawable.indicator_ic_mp_playing_list, activity.getTheme());
             mActivity = activity;
         }

         @Override
         public View getView(int position, View convertView, ViewGroup parent) {
             Log.d(TAG, "getView()");
             if (convertView == null) {
                 convertView = LayoutInflater.from(getContext()).inflate(mLayoutId, parent, false);
                 ImageView iv = (ImageView) convertView.findViewById(R.id.icon);
                 iv.setVisibility(View.GONE);
                 ViewHolder vh = new ViewHolder();
                 vh.line1 = (TextView) convertView.findViewById(R.id.line1);
                 vh.line2 = (TextView) convertView.findViewById(R.id.line2);
                 vh.duration = (TextView) convertView.findViewById(R.id.duration);
                 vh.play_indicator = (ImageView) convertView.findViewById(R.id.play_indicator);
                 convertView.setTag(vh);
             }
             ViewHolder holder = (ViewHolder) convertView.getTag();
             MediaBrowser.MediaItem item = getItem(position);
             Log.d(TAG, "title: " + item.getDescription().getTitle());
             holder.line1.setText(item.getDescription().getTitle());
             Log.d(TAG, "artist: " + item.getDescription().getSubtitle());
             holder.line2.setText(item.getDescription().getSubtitle());
             long duration =
                     item.getDescription().getExtras().getLong(MediaMetadata.METADATA_KEY_DURATION);
             LogHelper.d(TAG, "duration: ", duration);
             holder.duration.setText(MusicUtils.makeTimeString(getContext(), duration / 1000));
             MediaController mediaController = mActivity.getMediaController();
             if (mediaController == null) {
                 holder.play_indicator.setImageDrawable(null);
                 return convertView;
             }
             MediaMetadata metadata = mediaController.getMetadata();
             if (metadata == null) {
                 holder.play_indicator.setImageDrawable(null);
                 return convertView;
             }
             if (item.getDescription().getMediaId().endsWith(
                         metadata.getString(MediaMetadata.METADATA_KEY_MEDIA_ID))) {
                 holder.play_indicator.setImageDrawable(mNowPlayingOverlay);
             } else {
                 holder.play_indicator.setImageDrawable(null);
             }
             return convertView;
         }
     }

     @Override
     public Object onRetainNonConfigurationInstance() {
         TrackBrowseAdapter a = mBrowseListAdapter;
         return a;
     }

     @Override
     protected void onListItemClick(ListView l, View v, int position, long id) {
         Log.d(TAG, "onListItemClick at position " + position + ", id " + id);
         MediaBrowser.MediaItem item = mBrowseListAdapter.getItem(position);
         if (item.isPlayable()) {
             getMediaController().getTransportControls().playFromMediaId(item.getMediaId(), null);
         }
     }
 }
	/*
	* Copyright (C) 2007 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 com.android.music;

	import android.app.Activity;
	import android.app.ListActivity;
	import android.content.ComponentName;
	import android.content.Context;
	import android.content.Intent;
	import android.graphics.Color;
	import android.graphics.drawable.Drawable;
	import android.media.AudioManager;
	import android.media.MediaDescription;
	import android.media.MediaMetadata;
	import android.media.browse.MediaBrowser;
	import android.media.session.MediaController;
	import android.media.session.MediaSession;
	import android.os.Bundle;
	import android.util.Log;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;
	import android.view.Window;
	import android.widget.*;
	import com.android.music.utils.LogHelper;
	import com.android.music.utils.MediaIDHelper;

	import java.util.ArrayList;
	import java.util.List;

	/*
	This activity shows when there is a need for
	1. Songs tab [withtab = true]
	2. Browse songs within an album [withtab = false]
	3. Browse songs within a playlist [withtab = false]
	4. Browse songs within now playing queue [withtab = false]
	*/
	public class TrackBrowserActivity extends ListActivity {
	private static final String TAG = LogHelper.makeLogTag(TrackBrowserActivity.class);
	private static final MediaBrowser.MediaItem DEFAULT_PARENT_ITEM =
	new MediaBrowser.MediaItem(new MediaDescription.Builder()
	.setMediaId(MediaIDHelper.MEDIA_ID_MUSICS_BY_SONG)
	.setTitle("Songs")
	.build(),
	MediaBrowser.MediaItem.FLAG_BROWSABLE);

	// Underlining ListView of this Activity
	private ListView mTrackList;
	// The mediaId to be used for subscribing for children using the MediaBrowser.
	private MediaBrowser.MediaItem mParentItem;
	private MediaBrowser mMediaBrowser;
	private TrackBrowseAdapter mBrowseListAdapter;
	private boolean mWithTabs;

	/**
	* Called when the activity is first created.
	*/
	@Override
	public void onCreate(Bundle icicle) {
	Log.d(TAG, "onCreate()");
	super.onCreate(icicle);
	// Process past states
	Intent intent = getIntent();
	if (icicle != null) {
	LogHelper.d(TAG, "Launch by saved instance state");
	mParentItem = icicle.getParcelable(MusicUtils.TAG_PARENT_ITEM);
	mWithTabs = icicle.getBoolean(MusicUtils.TAG_WITH_TABS);
	MusicUtils.updateNowPlaying(this);
	} else if (intent != null) {
	LogHelper.d(TAG, "Launch by intent");
	mParentItem = intent.getParcelableExtra(MusicUtils.TAG_PARENT_ITEM);
	mWithTabs = intent.getBooleanExtra(MusicUtils.TAG_WITH_TABS, false);
	}
	if (mParentItem == null) {
	LogHelper.d(TAG, "Launch by default parameters");
	mParentItem = DEFAULT_PARENT_ITEM;
	mWithTabs = true;
	}
	if (mWithTabs) {
	requestWindowFeature(Window.FEATURE_NO_TITLE);
	}
	setTitle(mParentItem.getDescription().getTitle());
	setVolumeControlStream(AudioManager.STREAM_MUSIC);

	// Init layout
	LogHelper.d(TAG, "init layout");
	setContentView(R.layout.media_picker_activity);
	MusicUtils.updateButtonBar(this, R.id.songtab);

	// Init the ListView
	Log.d(TAG, "Creating ListView");
	mTrackList = getListView();
	mTrackList.setCacheColorHint(0);
	mTrackList.setTextFilterEnabled(true);
	mBrowseListAdapter = (TrackBrowseAdapter) getLastNonConfigurationInstance();
	if (mBrowseListAdapter == null) {
	mBrowseListAdapter = new TrackBrowseAdapter(this, R.layout.track_list_item);
	}
	setListAdapter(mBrowseListAdapter);
	// don't set the album art until after the view has been layed out
	mTrackList.post(new Runnable() {
	public void run() {
	mTrackList.setBackgroundColor(Color.WHITE);
	mTrackList.setCacheColorHint(0);
	}
	});

	// Create media browser
	Log.d(TAG, "Creating MediaBrowser");
	mMediaBrowser = new MediaBrowser(this, new ComponentName(this, MediaPlaybackService.class),
	mConnectionCallback, null);
	}

	@Override
	public void onStart() {
	Log.d(TAG, "onStart()");
	super.onStart();
	mMediaBrowser.connect();
	}

	@Override
	public void onStop() {
	Log.d(TAG, "onStop()");
	super.onStop();
	mMediaBrowser.disconnect();
	}

	@Override
	public void onDestroy() {
	Log.d(TAG, "onDestroy()");
	ListView lv = getListView();
	// Because we pass the adapter to the next activity, we need to make
	// sure it doesn't keep a reference to this activity. We can do this
	// by clearing its DatasetObservers, which setListAdapter(null) does.
	setListAdapter(null);
	mBrowseListAdapter = null;
	super.onDestroy();
	}

	@Override
	public void onResume() {
	Log.d(TAG, "onResume()");
	super.onResume();
	}

	@Override
	public void onPause() {
	Log.d(TAG, "onPause()");
	super.onPause();
	}

	@Override
	public void onSaveInstanceState(Bundle outcicle) {
	outcicle.putParcelable(MusicUtils.TAG_PARENT_ITEM, mParentItem);
	outcicle.putBoolean(MusicUtils.TAG_WITH_TABS, mWithTabs);
	super.onSaveInstanceState(outcicle);
	}

	private MediaBrowser.SubscriptionCallback mSubscriptionCallback =
	new MediaBrowser.SubscriptionCallback() {

	@Override
	public void onChildrenLoaded(
	String parentId, List<MediaBrowser.MediaItem> children) {
	mBrowseListAdapter.clear();
	mBrowseListAdapter.notifyDataSetInvalidated();
	for (MediaBrowser.MediaItem item : children) {
	mBrowseListAdapter.add(item);
	}
	mBrowseListAdapter.notifyDataSetChanged();
	}

	@Override
	public void onError(String id) {
	Toast.makeText(getApplicationContext(), R.string.error_loading_media,
	Toast.LENGTH_LONG)
	.show();
	}
	};

	private MediaBrowser.ConnectionCallback mConnectionCallback =
	new MediaBrowser.ConnectionCallback() {
	@Override
	public void onConnected() {
	Log.d(TAG, "onConnected: session token " + mMediaBrowser.getSessionToken());
	mMediaBrowser.subscribe(mParentItem.getMediaId(), mSubscriptionCallback);
	if (mMediaBrowser.getSessionToken() == null) {
	throw new IllegalArgumentException("No Session token");
	}
	MediaController mediaController = new MediaController(
	TrackBrowserActivity.this, mMediaBrowser.getSessionToken());
	mediaController.registerCallback(mMediaControllerCallback);
	TrackBrowserActivity.this.setMediaController(mediaController);
	if (mediaController.getMetadata() != null && mWithTabs) {
	MusicUtils.updateNowPlaying(TrackBrowserActivity.this);
	}
	}

	@Override
	public void onConnectionFailed() {
	Log.d(TAG, "onConnectionFailed");
	}

	@Override
	public void onConnectionSuspended() {
	Log.d(TAG, "onConnectionSuspended");
	TrackBrowserActivity.this.setMediaController(null);
	}
	};

	private MediaController.Callback mMediaControllerCallback = new MediaController.Callback() {
	@Override
	public void onMetadataChanged(MediaMetadata metadata) {
	super.onMetadataChanged(metadata);
	if (mWithTabs) {
	MusicUtils.updateNowPlaying(TrackBrowserActivity.this);
	}
	if (mBrowseListAdapter != null) {
	mBrowseListAdapter.notifyDataSetChanged();
	}
	}
	};

	// An adapter for showing the list of browsed MediaItem's
	private static class TrackBrowseAdapter extends ArrayAdapter<MediaBrowser.MediaItem> {
	private int mLayoutId;
	private final Drawable mNowPlayingOverlay;
	private Activity mActivity;

	static class ViewHolder {
	TextView line1;
	TextView line2;
	TextView duration;
	ImageView play_indicator;
	}

	TrackBrowseAdapter(Activity activity, int layout) {
	super(activity, layout, new ArrayList<>());
	mLayoutId = layout;
	mNowPlayingOverlay = activity.getResources().getDrawable(
	R.drawable.indicator_ic_mp_playing_list, activity.getTheme());
	mActivity = activity;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
	Log.d(TAG, "getView()");
	if (convertView == null) {
	convertView = LayoutInflater.from(getContext()).inflate(mLayoutId, parent, false);
	ImageView iv = (ImageView) convertView.findViewById(R.id.icon);
	iv.setVisibility(View.GONE);
	ViewHolder vh = new ViewHolder();
	vh.line1 = (TextView) convertView.findViewById(R.id.line1);
	vh.line2 = (TextView) convertView.findViewById(R.id.line2);
	vh.duration = (TextView) convertView.findViewById(R.id.duration);
	vh.play_indicator = (ImageView) convertView.findViewById(R.id.play_indicator);
	convertView.setTag(vh);
	}
	ViewHolder holder = (ViewHolder) convertView.getTag();
	MediaBrowser.MediaItem item = getItem(position);
	Log.d(TAG, "title: " + item.getDescription().getTitle());
	holder.line1.setText(item.getDescription().getTitle());
	Log.d(TAG, "artist: " + item.getDescription().getSubtitle());
	holder.line2.setText(item.getDescription().getSubtitle());
	long duration =
	item.getDescription().getExtras().getLong(MediaMetadata.METADATA_KEY_DURATION);
	LogHelper.d(TAG, "duration: ", duration);
	holder.duration.setText(MusicUtils.makeTimeString(getContext(), duration / 1000));
	MediaController mediaController = mActivity.getMediaController();
	if (mediaController == null) {
	holder.play_indicator.setImageDrawable(null);
	return convertView;
	}
	MediaMetadata metadata = mediaController.getMetadata();
	if (metadata == null) {
	holder.play_indicator.setImageDrawable(null);
	return convertView;
	}
	if (item.getDescription().getMediaId().endsWith(
	metadata.getString(MediaMetadata.METADATA_KEY_MEDIA_ID))) {
	holder.play_indicator.setImageDrawable(mNowPlayingOverlay);
	} else {
	holder.play_indicator.setImageDrawable(null);
	}
	return convertView;
	}
	}

	@Override
	public Object onRetainNonConfigurationInstance() {
	TrackBrowseAdapter a = mBrowseListAdapter;
	return a;
	}

	@Override
	protected void onListItemClick(ListView l, View v, int position, long id) {
	Log.d(TAG, "onListItemClick at position " + position + ", id " + id);
	MediaBrowser.MediaItem item = mBrowseListAdapter.getItem(position);
	if (item.isPlayable()) {
	getMediaController().getTransportControls().playFromMediaId(item.getMediaId(), null);
	}
	}
	}