android高分段进阶攻略(8)音乐播放器代码实现一SlidingDrawer实现

本节继上节之后,应介绍用代码如何实现sildemenu这个抽屉效果,但是有点纠结,因为有些代码不是我写的,我看得头都昏了,还是没研究懂别人的想法,讲的不好的地方还求大家指正,顺便询问大家,哪里有Canvas和Paints的教程,我对这方面不是很在行,还希望大家给点学习意见。先贴下代码吧:

public class MusicPlayActivity extends Activity implements
		IOnServiceConnectComplete {
	/** Called when the activity is first created. */
	private final static String TAG = "MusicPlayActivity";

	private final String BROCAST_NAME = "com.aimn.musicplay.brocast";

	private final static int REFRESH_PROGRESS_EVENT = 0x100;

	private final static int ABOUT_DIALOG_ID = 1;

	private Handler mHandler;

	private UIManager mUIManager;

	private ServiceManager mServiceManager;

	private MusicTimer mMusicTimer;

	private MusicPlayStateBrocast mPlayStateBrocast;

	private SDStateBrocast mSDStateBrocast;

	private List<MusicData> m_MusicFileList;

	private ListViewAdapter mListViewAdapter;

	private boolean mIsSdExist = false;
	private boolean mIsHaveData = false;

	private int mCurMusicTotalTime = 0;

	private int mCurPlayMode = MusicPlayMode.MPM_LIST_LOOP_PLAY;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		long time1 = System.currentTimeMillis();
		init();
		long time2 = System.currentTimeMillis();
		Log.i(TAG, "initView	cost = " + (time2 - time1));
	}

	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();

		mMusicTimer.stopTimer();
		unregisterReceiver(mPlayStateBrocast);
		unregisterReceiver(mSDStateBrocast);
		mServiceManager.disconnectService();

	}

	public void onResume() {
		super.onResume();
		Log.i(TAG, "onResume");
	}

	public void onStart() {
		super.onStart();
		Log.i(TAG, "onStart");
	}

	@Override
	protected Dialog onCreateDialog(int id) {
		// TODO Auto-generated method stub

		switch (id) {
		case ABOUT_DIALOG_ID: {
			Dialog aboutDialog = new AlertDialog.Builder(MusicPlayActivity.this)
					.setIcon(R.drawable.about_dialog_icon)
					.setTitle(R.string.about_title_name)
					.setMessage(R.string.about_content)
					.setPositiveButton("确定",
							new DialogInterface.OnClickListener() {
								public void onClick(DialogInterface dialog,
										int whichButton) {

									/* User clicked OK so do some stuff */
								}
							}).create();

			return aboutDialog;
		}
		default:
			break;
		}

		return null;
	}

	@Override
	public void onBackPressed() {
		// TODO Auto-generated method stub

		mUIManager.Back();
	}

	public void init() {
		mHandler = new Handler() {

			@Override
			public void handleMessage(Message msg) {
				// TODO Auto-generated method stub

				switch (msg.what) {
				case REFRESH_PROGRESS_EVENT:
					mUIManager.setPlayInfo(mServiceManager.getCurPosition(),
							mCurMusicTotalTime, null);
					break;
				default:
					break;
				}
			}

		};

		mUIManager = new UIManager();

		mServiceManager = new ServiceManager(this);
		mServiceManager.setOnServiceConnectComplete(this);
		mServiceManager.connectService();

		mMusicTimer = new MusicTimer(mHandler, REFRESH_PROGRESS_EVENT);

		m_MusicFileList = new ArrayList<MusicData>();
		mListViewAdapter = new ListViewAdapter(this, m_MusicFileList);
		mUIManager.mListView.setAdapter(mListViewAdapter);

		mPlayStateBrocast = new MusicPlayStateBrocast();
		IntentFilter intentFilter1 = new IntentFilter(BROCAST_NAME);
		registerReceiver(mPlayStateBrocast, intentFilter1);

		mSDStateBrocast = new SDStateBrocast();
		IntentFilter intentFilter2 = new IntentFilter();
		intentFilter2.addAction(Intent.ACTION_MEDIA_MOUNTED);
		intentFilter2.addAction(Intent.ACTION_MEDIA_UNMOUNTED);
		intentFilter2.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED);
		intentFilter2.addAction(Intent.ACTION_MEDIA_EJECT);
		intentFilter2.addDataScheme("file");
		registerReceiver(mSDStateBrocast, intentFilter2);
	}

	private List<MusicData> getMusicFileList() {
		List<MusicData> list = new ArrayList<MusicData>();

		String[] projection = new String[] { MediaStore.Audio.Media._ID,
				MediaStore.Audio.Media.TITLE, MediaStore.Audio.Media.DURATION,
				MediaStore.Audio.Media.DATA, MediaStore.Audio.Media.ARTIST };

		long time1 = System.currentTimeMillis();
		Cursor cursor = getContentResolver().query(
				MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, projection, null,
				null, null);
		if (cursor != null) {
			cursor.moveToFirst();

			int colNameIndex = cursor
					.getColumnIndex(MediaStore.Audio.Media.TITLE);
			int colTimeIndex = cursor
					.getColumnIndex(MediaStore.Audio.Media.DURATION);
			int colPathIndex = cursor
					.getColumnIndex(MediaStore.Audio.Media.DATA);
			int colArtistIndex = cursor
					.getColumnIndex(MediaStore.Audio.Media.ARTIST);

			int fileNum = cursor.getCount();
			for (int counter = 0; counter < fileNum; counter++) {

				MusicData data = new MusicData();
				data.mMusicName = cursor.getString(colNameIndex);
				data.mMusicTime = cursor.getInt(colTimeIndex);
				data.mMusicPath = cursor.getString(colPathIndex);
				data.mMusicAritst = cursor.getString(colArtistIndex);

				list.add(data);
				cursor.moveToNext();
			}

			cursor.close();
		}
		long time2 = System.currentTimeMillis();

		Log.i(TAG, "seach filelist cost = " + (time2 - time1));
		return list;
	}

	public void showNoData() {
		Toast.makeText(this, "No Music Data...", Toast.LENGTH_SHORT).show();
	}

	public void rePlay() {
		if (mIsHaveData == false) {
			showNoData();
		} else {
			mServiceManager.rePlay();
		}

	}

	public void play(int position) {
		if (mIsHaveData == false) {
			showNoData();
		} else {
			mServiceManager.play(position);
		}

	}

	public void pause() {
		mServiceManager.pause();
	}

	public void stop() {
		mServiceManager.stop();
	}

	public void playPre() {
		if (mIsHaveData == false) {
			showNoData();
		} else {
			mServiceManager.playPre();
		}

	}

	public void playNext() {
		if (mIsHaveData == false) {
			showNoData();
		} else {
			mServiceManager.playNext();
		}

	}

	public void seekTo(int rate) {
		mServiceManager.seekTo(rate);
	}

	public void exit() {
		mServiceManager.exit();
		finish();
	}

	public void modeChange() {
		mCurPlayMode++;
		if (mCurPlayMode > MusicPlayMode.MPM_RANDOM_PLAY) {
			mCurPlayMode = MusicPlayMode.MPM_SINGLE_LOOP_PLAY;
		}

		mServiceManager.setPlayMode(mCurPlayMode);
		mUIManager.setPlayMode(mCurPlayMode, true);
	}

	public void onMenuItemClick(int pos) {
		switch (pos) {
		case 0: // 设置
			Toast.makeText(this, "该功能尚未开放,请下版本再试", Toast.LENGTH_SHORT).show();
			break;
		case 1: // 关于
			showDialog(ABOUT_DIALOG_ID);
			break;
		case 2: // 云同步
			Toast.makeText(this, "该服务尚未开通,请购买后使用", Toast.LENGTH_SHORT).show();
			break;
		case 3: // 退出
			exit();
			break;
		default:
			break;
		}
	}

	@Override
	public void OnServiceConnectComplete() {
		// TODO Auto-generated method stub

		Log.i(TAG, "OnServiceConnectComplete.......");

		// long time3 = System.currentTimeMillis();

		String state = Environment.getExternalStorageState().toString();
		if (state.equals(Environment.MEDIA_MOUNTED)) {
			mIsSdExist = true;
		} else {
			Toast.makeText(this, "SD卡未安装,建议安装SD卡", Toast.LENGTH_SHORT).show();
			return;
		}

		int playState = mServiceManager.getPlayState();
		switch (playState) {
		case MusicPlayState.MPS_NOFILE:
			m_MusicFileList = getMusicFileList();

			mServiceManager.refreshMusicList(m_MusicFileList);
			break;
		case MusicPlayState.MPS_INVALID:
		case MusicPlayState.MPS_PREPARE:
		case MusicPlayState.MPS_PLAYING:
		case MusicPlayState.MPS_PAUSE:
			long time1 = System.currentTimeMillis();
			m_MusicFileList = mServiceManager.getFileList();
			long time2 = System.currentTimeMillis();
			Log.i(TAG, "mServiceManager.getFileList()	cost = "
					+ (time2 - time1));
			mServiceManager.sendPlayStateBrocast();
			break;
		default:
			break;
		}

		if (m_MusicFileList.size() > 0) {
			mIsHaveData = true;
		}

		mListViewAdapter.refreshAdapter(m_MusicFileList);

		mUIManager.setPlayMode(mServiceManager.getPlayMode(), false);

	}

	class SDStateBrocast extends BroadcastReceiver {

		@Override
		public void onReceive(Context context, Intent intent) {
			// TODO Auto-generated method stub
			String action = intent.getAction();

			if (action.equals(Intent.ACTION_MEDIA_MOUNTED)) {

				mIsSdExist = true;
			} else if (action.equals(Intent.ACTION_MEDIA_UNMOUNTED)) {

				mIsSdExist = false;

			} else if (Intent.ACTION_MEDIA_SCANNER_FINISHED.equals(action)) {

				if (mIsSdExist) {
					m_MusicFileList = getMusicFileList();
					mServiceManager.refreshMusicList(m_MusicFileList);
					if (m_MusicFileList.size() > 0) {
						mIsHaveData = true;
					}
					mListViewAdapter.refreshAdapter(m_MusicFileList);
				}

			} else if (Intent.ACTION_MEDIA_EJECT.equals(action)) {

				m_MusicFileList.clear();
				mListViewAdapter.refreshAdapter(m_MusicFileList);
				mIsHaveData = false;
				mUIManager.emptyPlayInfo();
			}

		}

	}

	class MusicPlayStateBrocast extends BroadcastReceiver {

		@Override
		public void onReceive(Context context, Intent intent) {
			// TODO Auto-generated method stub

			String action = intent.getAction();
			if (action.equals(BROCAST_NAME)) {
				TransPlayStateEvent(intent);
			}

		}

		public void TransPlayStateEvent(Intent intent) {
			MusicData data = new MusicData();
			int playState = intent.getIntExtra(MusicPlayState.PLAY_STATE_NAME,
					-1);
			Bundle bundle = intent.getBundleExtra(MusicData.KEY_MUSIC_DATA);
			if (bundle != null) {
				data = bundle.getParcelable(MusicData.KEY_MUSIC_DATA);
			}
			int playIndex = intent.getIntExtra(MusicPlayState.PLAY_MUSIC_INDEX,
					-1);

			switch (playState) {
			case MusicPlayState.MPS_INVALID:
				mMusicTimer.stopTimer();
				Toast.makeText(MusicPlayActivity.this, "当前音乐文件无效",
						Toast.LENGTH_SHORT).show();
				mUIManager.setPlayInfo(0, data.mMusicTime, data.mMusicName);
				mUIManager.showPlay(true);
				break;
			case MusicPlayState.MPS_PREPARE:
				mMusicTimer.stopTimer();
				mCurMusicTotalTime = data.mMusicTime;
				if (mCurMusicTotalTime == 0) {
					mCurMusicTotalTime = mServiceManager.getDuration();
				}
				mUIManager.setPlayInfo(0, data.mMusicTime, data.mMusicName);
				mUIManager.showPlay(true);
				break;
			case MusicPlayState.MPS_PLAYING:
				mMusicTimer.startTimer();
				if (mCurMusicTotalTime == 0) {
					mCurMusicTotalTime = mServiceManager.getDuration();
				}
				mUIManager.setPlayInfo(mServiceManager.getCurPosition(),
						data.mMusicTime, data.mMusicName);
				mUIManager.showPlay(false);
				break;
			case MusicPlayState.MPS_PAUSE:
				mMusicTimer.stopTimer();
				if (mCurMusicTotalTime == 0) {
					mCurMusicTotalTime = mServiceManager.getDuration();
				}
				mUIManager.setPlayInfo(mServiceManager.getCurPosition(),
						data.mMusicTime, data.mMusicName);
				mUIManager.showPlay(true);
				break;
			default:
				break;
			}

			mUIManager.setSongNumInfo(playIndex, m_MusicFileList.size());

			mListViewAdapter.setPlayState(playIndex, playState);
		}

	}

	public boolean onMenuOpened(int featureId, Menu menu) { // 截获菜单事件
		// TODO Auto-generated method stub

		mUIManager.showMenuWindow();

		return false; // 返回为true 则显示系统menu

	}

	public boolean onCreateOptionsMenu(Menu menu) {
		// TODO Auto-generated method stub

		menu.add("menu");// 必须创建一项
		return super.onCreateOptionsMenu(menu);

	}

	class UIManager implements OnItemClickListener {

		private final static String TAG = "UIManager";

		private SliderDrawerManager mSliderDrawerManager;

		private PopMenuManager mPopMenuManager;

		public ListView mListView;

		private View mMusicListView;

		private int mModeDrawableIDS[] = { R.drawable.mode_single_loop,
				R.drawable.mode_order, R.drawable.mode_list_loop,
				R.drawable.mode_random };

		private String modeToasts[] = { "单曲循环", "顺序播放", "列表循环", "随机播放" };

		public UIManager() {
			initView();
		}

		private void initView() {

			mListView = (ListView) findViewById(R.id.listView);
			mListView.setOnItemClickListener(this);
			mMusicListView = findViewById(R.id.ListLayout);

			mSliderDrawerManager = new SliderDrawerManager();
			mPopMenuManager = new PopMenuManager();
		}

		public void setPlayInfo(int curTime, int totalTime, String musicName) {
			curTime /= 1000;
			totalTime /= 1000;
			int curminute = curTime / 60;
			int cursecond = curTime % 60;

			String curTimeString = String.format("%02d:%02d", curminute,
					cursecond);

			int totalminute = totalTime / 60;
			int totalsecond = totalTime % 60;
			String totalTimeString = String.format("%02d:%02d", totalminute,
					totalsecond);

			int rate = 0;
			if (totalTime != 0) {
				rate = (int) ((float) curTime / totalTime * 100);
			}

			mSliderDrawerManager.mPlayProgress.setProgress(rate);

			mSliderDrawerManager.mcurtimeTextView.setText(curTimeString);
			mSliderDrawerManager.mtotaltimeTextView.setText(totalTimeString);
			if (musicName != null) {
				mSliderDrawerManager.mPlaySongTextView.setText(musicName);
			}

		}

		public void emptyPlayInfo() {
			mSliderDrawerManager.mPlayProgress.setProgress(0);
			mSliderDrawerManager.mcurtimeTextView.setText("00:00");
			mSliderDrawerManager.mtotaltimeTextView.setText("00:00");
			mSliderDrawerManager.mPlaySongTextView
					.setText(R.string.default_title_name);

		}

		public void setSongNumInfo(int curPlayIndex, int totalSongNum) {
			String str = String.valueOf(curPlayIndex + 1) + "/"
					+ String.valueOf(totalSongNum);

			mSliderDrawerManager.mSongNumTextView.setText(str);
		}

		public void showPlay(boolean flag) {
			if (flag) {
				mSliderDrawerManager.mBtnPlay.setVisibility(View.VISIBLE);
				mSliderDrawerManager.mBtnPause.setVisibility(View.GONE);
				mSliderDrawerManager.mBtnHandlePlay.setVisibility(View.VISIBLE);
				mSliderDrawerManager.mBtnHandlePause
						.setVisibility(View.INVISIBLE);

			} else {
				mSliderDrawerManager.mBtnPlay.setVisibility(View.GONE);
				mSliderDrawerManager.mBtnPause.setVisibility(View.VISIBLE);
				mSliderDrawerManager.mBtnHandlePlay
						.setVisibility(View.INVISIBLE);
				mSliderDrawerManager.mBtnHandlePause
						.setVisibility(View.VISIBLE);
			}

		}

		public void ShowHandlePanel(boolean flag) {
			if (flag) {
				mSliderDrawerManager.mHandlePane.setVisibility(View.VISIBLE);
			} else {
				mSliderDrawerManager.mHandlePane.setVisibility(View.INVISIBLE);
			}

		}

		public void setPlayMode(int mode, Boolean bShowToast) {
			if (mode >= MusicPlayMode.MPM_SINGLE_LOOP_PLAY
					&& mode <= MusicPlayMode.MPM_RANDOM_PLAY) {
				mSliderDrawerManager.mBtnModeSet
						.setImageResource(mModeDrawableIDS[mode]);

				if (bShowToast) {
					Toast.makeText(MusicPlayActivity.this, modeToasts[mode],
							Toast.LENGTH_SHORT).show();
				}

			}

		}

		public void Back() {
			if (mSliderDrawerManager.mSlidingDrawer.isOpened()) {
				mSliderDrawerManager.mSlidingDrawer.close();
			} else {
				finish();
			}
		}

		public void showMenuWindow() {
			mPopMenuManager.showMenuWindow();
		}

		@Override
		public void onItemClick(AdapterView<?> arg0, View arg1, int pos,
				long arg3) {
			// TODO Auto-generated method stub

			play(pos);

		}

		class SliderDrawerManager implements OnClickListener,
				OnSeekBarChangeListener, OnDrawerOpenListener,
				OnDrawerCloseListener, IOnSliderHandleViewClickListener {
			public MySlidingDrawer mSlidingDrawer;

			public ImageButton mBtnHandle;
			public ImageButton mBtnHandlePlay;
			public ImageButton mBtnHandlePause;
			public TextView mSongNumTextView;
			public View mHandlePane;
			public TextView mPlaySongTextView;

			public ImageButton mBtnModeSet;
			public ImageButton mBtnVolumnSet;
			public SeekBar mPlayProgress;
			public TextView mcurtimeTextView;
			public TextView mtotaltimeTextView;

			public ImageButton mBtnPlay;
			public ImageButton mBtnPause;
			public ImageButton mBtnStop;
			public ImageButton mBtnPlayNext;
			public ImageButton mBtnPlayPre;
			public ImageButton mBtnMenu;

			private boolean mPlayAuto = true;

			private GalleryFlow mGalleryFlow1;
			private GalleryFlow mGalleryFlow2;

			public SliderDrawerManager() {
				initView();
			}

			private void initView() {
				mBtnPlay = (ImageButton) findViewById(R.id.buttonPlay);
				mBtnPause = (ImageButton) findViewById(R.id.buttonPause);
				mBtnStop = (ImageButton) findViewById(R.id.buttonStop);
				mBtnPlayPre = (ImageButton) findViewById(R.id.buttonPlayPre);
				mBtnPlayNext = (ImageButton) findViewById(R.id.buttonPlayNext);
				mBtnMenu = (ImageButton) findViewById(R.id.buttonMenu);
				mBtnModeSet = (ImageButton) findViewById(R.id.buttonMode);
				mBtnVolumnSet = (ImageButton) findViewById(R.id.buttonVolumn);
				mBtnHandle = (ImageButton) findViewById(R.id.handler_icon);
				mBtnHandlePlay = (ImageButton) findViewById(R.id.handler_play);
				mBtnHandlePause = (ImageButton) findViewById(R.id.handler_pause);
				mBtnPlay.setOnClickListener(this);
				mBtnPause.setOnClickListener(this);
				mBtnStop.setOnClickListener(this);
				mBtnPlayPre.setOnClickListener(this);
				mBtnPlayNext.setOnClickListener(this);
				mBtnStop.setOnClickListener(this);
				mBtnMenu.setOnClickListener(this);
				mBtnModeSet.setOnClickListener(this);
				mBtnVolumnSet.setOnClickListener(this);

				mPlaySongTextView = (TextView) findViewById(R.id.textPlaySong);
				mcurtimeTextView = (TextView) findViewById(R.id.textViewCurTime);
				mtotaltimeTextView = (TextView) findViewById(R.id.textViewTotalTime);
				mSongNumTextView = (TextView) findViewById(R.id.textSongNum);

				mPlayProgress = (SeekBar) findViewById(R.id.seekBar);
				mPlayProgress.setOnSeekBarChangeListener(this);

				mSlidingDrawer = (MySlidingDrawer) findViewById(R.id.slidingDrawer);
				mSlidingDrawer.setOnDrawerOpenListener(this);
				mSlidingDrawer.setOnDrawerCloseListener(this);
				mSlidingDrawer.setHandleId(R.id.handler_icon);
				mSlidingDrawer.setTouchableIds(new int[] { R.id.handler_play,
						R.id.handler_pause });
				mSlidingDrawer.setOnSliderHandleViewClickListener(this);

				mHandlePane = findViewById(R.id.handle_panel);

				Integer[] images1 = { R.drawable.ablumlayout_bg };
				ImageAdapter adapter1 = new ImageAdapter(
						MusicPlayActivity.this, images1);
				adapter1.createReflectedImages();
				mGalleryFlow1 = (GalleryFlow) findViewById(R.id.imageGallery1);
				mGalleryFlow1.setAdapter(adapter1);

				Integer[] images2 = { R.drawable.ablum_deflaut };
				ImageAdapter adapter2 = new ImageAdapter(
						MusicPlayActivity.this, images2);
				adapter2.createReflectedImages(23);
				mGalleryFlow2 = (GalleryFlow) findViewById(R.id.imageGallery2);
				mGalleryFlow2.setAdapter(adapter2);
			}

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				switch (v.getId()) {
				case R.id.buttonPlay:
					rePlay();
					break;
				case R.id.buttonPause:
					pause();
					break;
				case R.id.buttonStop:
					stop();
					break;
				case R.id.buttonPlayPre:
					playPre();
					break;
				case R.id.buttonPlayNext:
					playNext();
					break;
				case R.id.buttonMenu:
					showMenuWindow();
					break;
				case R.id.buttonMode:
					modeChange();
					break;
				case R.id.buttonVolumn:
					Toast.makeText(MusicPlayActivity.this, "暂时不支持gaigong的",
							Toast.LENGTH_SHORT).show();
					;
					break;
				default:
					break;
				}
			}

			@Override
			public void onProgressChanged(SeekBar seekBar, int progress,
					boolean fromUser) {
				// TODO Auto-generated method stub
				if (mPlayAuto == false) {
					mServiceManager.seekTo(progress);
				}
			}

			@Override
			public void onStartTrackingTouch(SeekBar seekBar) {
				// TODO Auto-generated method stub
				mPlayAuto = false;
			}

			@Override
			public void onStopTrackingTouch(SeekBar seekBar) {
				// TODO Auto-generated method stub
				mPlayAuto = true;
			}

			@Override
			public void onDrawerOpened() {
				// TODO Auto-generated method stub
				mMusicListView.setVisibility(View.INVISIBLE);
				mBtnHandle.setImageResource(R.drawable.handle_down);
				ShowHandlePanel(false);
			}

			@Override
			public void onDrawerClosed() {
				// TODO Auto-generated method stub
				mMusicListView.setVisibility(View.VISIBLE);
				mBtnHandle.setImageResource(R.drawable.handle_up);
				ShowHandlePanel(true);
			}

			@Override
			public void onViewClick(View view) {
				// TODO Auto-generated method stub
				switch (view.getId()) {
				case R.id.handler_play:
					rePlay();
					break;
				case R.id.handler_pause:
					pause();
					break;
				default:
					break;
				}
			}

		}

		class PopMenuManager implements
				android.widget.PopupWindow.OnDismissListener {

			MenuItemData mMenuItemData;
			private GridView mMenuGrid; // 弹出菜单GRIDVIEW
			private View mMenuView; // 弹出菜单视图
			private GridViewAdapter mGridViewAdapter; // 弹出菜单适配器
			private PopupWindow mPopupWindow; // 弹出菜单WINDOW

			private View mPopBackgroundView;

			public PopMenuManager() {
				initView();
			}

			private void initView() {
				mPopBackgroundView = findViewById(R.id.VirtualLayout);

				String[] menu_name_array1 = getResources().getStringArray(
						R.array.menu_item_name_array);
				LevelListDrawable levelListDrawable1 = (LevelListDrawable) getResources()
						.getDrawable(R.drawable.menu_image_list);
				mMenuItemData = new MenuItemData(levelListDrawable1,
						menu_name_array1, menu_name_array1.length);

				LayoutInflater inflater = getLayoutInflater();
				mMenuView = inflater.inflate(R.layout.menu, null);
				mMenuGrid = (GridView) mMenuView
						.findViewById(R.id.menuGridView);

				mGridViewAdapter = new GridViewAdapter(MusicPlayActivity.this,
						mMenuItemData);
				mMenuGrid.setAdapter(mGridViewAdapter);

				mMenuGrid.setOnItemClickListener(new OnItemClickListener() {

					@Override
					public void onItemClick(AdapterView<?> parent, View view,
							int position, long id) {
						// TODO Auto-generated method stub
						onMenuItemClick(position);
					}

				});

				mMenuGrid.setOnKeyListener(new OnKeyListener() {
					@Override
					public boolean onKey(View v, int keyCode, KeyEvent event) {
						// TODO Auto-generated method stub
						switch (keyCode) {
						case KeyEvent.KEYCODE_MENU:
							showMenuWindow();
							break;
						}

						return false;
					}
				});

				mPopupWindow = new PopupWindow(mMenuView,
						LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
				mPopupWindow.setFocusable(true); // 如果没有获得焦点menu菜单中的控件事件无法响应

				// 以下两行加上去后就可以使用BACK键关闭POPWINDOW
				ColorDrawable dw = new ColorDrawable(0x00);
				mPopupWindow.setBackgroundDrawable(dw);

				mPopupWindow.setAnimationStyle(android.R.style.Animation_Toast);
				mPopupWindow.setOnDismissListener(this);
			}

			public void showMenuWindow() {
				if (mPopupWindow.isShowing()) {
					mPopupWindow.dismiss();
					mPopBackgroundView.setVisibility(View.INVISIBLE);
				} else {
					mPopupWindow.showAsDropDown(findViewById(R.id.mainLayout),
							0, -125);
					mPopBackgroundView.setVisibility(View.VISIBLE);
				}

			}

			@Override
			public void onDismiss() {
				// TODO Auto-generated method stub
				mPopBackgroundView.setVisibility(View.INVISIBLE);
			}

		}

	}

}

这只是mainactivity,不要害怕代码多,我们一点一点分析,我们顺序来看,mainactivity继承了IOnServiceConnectComplete接口,这是AIDL接口,关于AIDL的内容后续我们会详细介绍,今天就暂不介绍,然后是init()方法,初始化mainactivity信息,找到该方法,发现这个方法首先生成了一个UIManager实例,发现UIManager是个内部类,发现它的构造方法也是调用了一个initView(),然后发现它又生成了一个SliderDrawerManager()的实例,而这个SliderDrawerManager();就是我们今天的重点,实现昨天的自定义SliderDrawer。

找到SliderDrawerManager这个内部类,代码如下:

class SliderDrawerManager implements OnClickListener,
				OnSeekBarChangeListener, OnDrawerOpenListener,
				OnDrawerCloseListener, IOnSliderHandleViewClickListener {
			public MySlidingDrawer mSlidingDrawer;

			public ImageButton mBtnHandle;
			public ImageButton mBtnHandlePlay;
			public ImageButton mBtnHandlePause;
			public TextView mSongNumTextView;
			public View mHandlePane;
			public TextView mPlaySongTextView;

			public ImageButton mBtnModeSet;
			public ImageButton mBtnVolumnSet;
			public SeekBar mPlayProgress;
			public TextView mcurtimeTextView;
			public TextView mtotaltimeTextView;

			public ImageButton mBtnPlay;
			public ImageButton mBtnPause;
			public ImageButton mBtnStop;
			public ImageButton mBtnPlayNext;
			public ImageButton mBtnPlayPre;
			public ImageButton mBtnMenu;

			private boolean mPlayAuto = true;

			private GalleryFlow mGalleryFlow1;
			private GalleryFlow mGalleryFlow2;

			public SliderDrawerManager() {
				initView();
			}

			private void initView() {
				mBtnPlay = (ImageButton) findViewById(R.id.buttonPlay);
				mBtnPause = (ImageButton) findViewById(R.id.buttonPause);
				mBtnStop = (ImageButton) findViewById(R.id.buttonStop);
				mBtnPlayPre = (ImageButton) findViewById(R.id.buttonPlayPre);
				mBtnPlayNext = (ImageButton) findViewById(R.id.buttonPlayNext);
				mBtnMenu = (ImageButton) findViewById(R.id.buttonMenu);
				mBtnModeSet = (ImageButton) findViewById(R.id.buttonMode);
				mBtnVolumnSet = (ImageButton) findViewById(R.id.buttonVolumn);
				mBtnHandle = (ImageButton) findViewById(R.id.handler_icon);
				mBtnHandlePlay = (ImageButton) findViewById(R.id.handler_play);
				mBtnHandlePause = (ImageButton) findViewById(R.id.handler_pause);
				mBtnPlay.setOnClickListener(this);
				mBtnPause.setOnClickListener(this);
				mBtnStop.setOnClickListener(this);
				mBtnPlayPre.setOnClickListener(this);
				mBtnPlayNext.setOnClickListener(this);
				mBtnStop.setOnClickListener(this);
				mBtnMenu.setOnClickListener(this);
				mBtnModeSet.setOnClickListener(this);
				mBtnVolumnSet.setOnClickListener(this);

				mPlaySongTextView = (TextView) findViewById(R.id.textPlaySong);
				mcurtimeTextView = (TextView) findViewById(R.id.textViewCurTime);
				mtotaltimeTextView = (TextView) findViewById(R.id.textViewTotalTime);
				mSongNumTextView = (TextView) findViewById(R.id.textSongNum);

				mPlayProgress = (SeekBar) findViewById(R.id.seekBar);
				mPlayProgress.setOnSeekBarChangeListener(this);

				mSlidingDrawer = (MySlidingDrawer) findViewById(R.id.slidingDrawer);
				mSlidingDrawer.setOnDrawerOpenListener(this);
				mSlidingDrawer.setOnDrawerCloseListener(this);
				mSlidingDrawer.setHandleId(R.id.handler_icon);
				mSlidingDrawer.setTouchableIds(new int[] { R.id.handler_play,
						R.id.handler_pause });
				mSlidingDrawer.setOnSliderHandleViewClickListener(this);

				mHandlePane = findViewById(R.id.handle_panel);

				Integer[] images1 = { R.drawable.ablumlayout_bg };
				ImageAdapter adapter1 = new ImageAdapter(
						MusicPlayActivity.this, images1);
				adapter1.createReflectedImages();
				mGalleryFlow1 = (GalleryFlow) findViewById(R.id.imageGallery1);
				mGalleryFlow1.setAdapter(adapter1);

				Integer[] images2 = { R.drawable.ablum_deflaut };
				ImageAdapter adapter2 = new ImageAdapter(
						MusicPlayActivity.this, images2);
				adapter2.createReflectedImages(23);
				mGalleryFlow2 = (GalleryFlow) findViewById(R.id.imageGallery2);
				mGalleryFlow2.setAdapter(adapter2);
			}

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				switch (v.getId()) {
				case R.id.buttonPlay:
					rePlay();
					break;
				case R.id.buttonPause:
					pause();
					break;
				case R.id.buttonStop:
					stop();
					break;
				case R.id.buttonPlayPre:
					playPre();
					break;
				case R.id.buttonPlayNext:
					playNext();
					break;
				case R.id.buttonMenu:
					showMenuWindow();
					break;
				case R.id.buttonMode:
					modeChange();
					break;
				case R.id.buttonVolumn:
					Toast.makeText(MusicPlayActivity.this, "暂时不支持该功能的",
							Toast.LENGTH_SHORT).show();
					;
					break;
				default:
					break;
				}
			}

			@Override
			public void onProgressChanged(SeekBar seekBar, int progress,
					boolean fromUser) {
				// TODO Auto-generated method stub
				if (mPlayAuto == false) {
					mServiceManager.seekTo(progress);
				}
			}

			@Override
			public void onStartTrackingTouch(SeekBar seekBar) {
				// TODO Auto-generated method stub
				mPlayAuto = false;
			}

			@Override
			public void onStopTrackingTouch(SeekBar seekBar) {
				// TODO Auto-generated method stub
				mPlayAuto = true;
			}

			@Override
			public void onDrawerOpened() {
				// TODO Auto-generated method stub
				mMusicListView.setVisibility(View.INVISIBLE);
				mBtnHandle.setImageResource(R.drawable.handle_down);
				ShowHandlePanel(false);
			}

			@Override
			public void onDrawerClosed() {
				// TODO Auto-generated method stub
				mMusicListView.setVisibility(View.VISIBLE);
				mBtnHandle.setImageResource(R.drawable.handle_up);
				ShowHandlePanel(true);
			}

			@Override
			public void onViewClick(View view) {
				// TODO Auto-generated method stub
				switch (view.getId()) {
				case R.id.handler_play:
					rePlay();
					break;
				case R.id.handler_pause:
					pause();
					break;
				default:
					break;
				}
			}

		}
前面都是绑定昨天SliderDrawer的UI控件的id,如下图


看到这里mSlidingDrawer = (MySlidingDrawer) findViewById(R.id.slidingDrawer);我们绑定了上节中我们设置的slidingDrawer,然后实现了setOnDrawerOpenListener和setOnDrawerCloseListener方法,虽然昨天我们自定义的MySlidingDrawer里面没有这两个方法,但是这是继承了父类SlidingDrawer的方法,SlidingDrawer一共有三个监听事件注意三者的执行顺序,总的原则是: 滑动完成后,打开(或者关闭)抽屉。所以:执行的顺序 1 setOnDrawerScrollListener,2setOnDrawerOpenListener或setOnDrawerCloseListener。其实到这里我们就已经可以知道我们如何实现slidingDrawer,我们总结下:

     自定义slidingDrawer,然后再xml实现它,包括抽屉头,hand,抽屉内容view,然后实例化SlidingDrawer,在

setOnDrawerOpenListener和setOnDrawerCloseListener里面写控件的变化,最终实现抽屉效果。

     后面的imageAdapter是个UI设计Adapter就是绘画中间那个音乐符的UI,代码如下:

public class ImageAdapter extends BaseAdapter {

	int mGalleryItemBackground;
	private Context mContext;
	private Integer[] mImageIds;
	private ImageView[] mImages;
	private int 	mCount;

	public ImageAdapter(Context c, Integer[] ImageIds) {
		mContext = c;
		mImageIds = ImageIds;
		mImages = new ImageView[mImageIds.length];
		mCount = mImageIds.length;
	}
	

	public boolean createReflectedImages() {
		return createReflectedImages(0);
	}
	public boolean createReflectedImages(int padding) {
		final int reflectionGap = 4;
		int index = 0;

		for (int imageId : mImageIds) {
			Bitmap originalImage = BitmapFactory.decodeResource(mContext
					.getResources(), imageId);
			
			if (originalImage == null)
			{
				mCount--;
				continue;
			}
			int width = originalImage.getWidth();
			int height = originalImage.getHeight();

			Matrix matrix = new Matrix();
//			matrix.setRotate(30);
			matrix.preScale(1, -1);

			Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0,
					height / 2, width, height / 2, matrix, false);

			Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
					(height + height / 2), Config.ARGB_8888);

			Canvas canvas = new Canvas(bitmapWithReflection);
			canvas.drawBitmap(originalImage, 0, 0, null);

			Paint deafaultPaint = new Paint();
			// 抗锯齿的方法
			// deafaultPaint.setAntiAlias(true);
			canvas.drawRect(0, height, width, height + reflectionGap,
					deafaultPaint);

			canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);

			Paint paint = new Paint();
			// 抗锯齿的方法
			// paint.setAntiAlias(true);
			LinearGradient shader = new LinearGradient(0,
					originalImage.getHeight(), 0,
					bitmapWithReflection.getHeight() + reflectionGap,
					0x70ffffff, 0x00ffffff, TileMode.CLAMP);

			paint.setShader(shader);

			paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
			canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()
					+ reflectionGap, paint);

			ImageView imageView = new ImageView(mContext);
			imageView.setImageBitmap(bitmapWithReflection);
			imageView.setLayoutParams(new GalleryFlow.LayoutParams(180, 240));
//			 imageView.setScaleType(ScaleType.MATRIX);
			imageView.setPadding(padding, padding, padding, padding);
			mImages[index++] = imageView;
		}
		return true;
	}

	private Resources getResources() {
		// TODO Auto-generated method stub
		return null;
	}

	public int getCount() {
		return mCount;
	}

	public Object getItem(int position) {
		return position;
	}

	public long getItemId(int position) {
		return position;
	}

	public View getView(int position, View convertView, ViewGroup parent) {
		return mImages[position];
	}

	public float getScale(boolean focused, int offset) {
		return Math.max(0, 1.0f / (float) Math.pow(2, Math.abs(offset)));
	}

}

     这里不是我写的,所以我也不知道具体绘画内容,到此SlidingDrawer抽屉效果讲解完了,下一节我们将详细分析这个mainactivity,看它是如何传递消息的。




android高分段进阶攻略(8)音乐播放器代码实现一SlidingDrawer实现,,5-wow.com

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