android高分段进阶攻略（8）音乐播放器代码实现一SlidingDrawer实现
浏览数：16 /
时间：2015年06月11日
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。
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