mediaplaybackactivity.java

Android平台上的media player, iPhone风格

            int shuffle = MusicUtils.getCurrentShuffleMode();
            if (shuffle == MediaPlaybackService.SHUFFLE_AUTO) {
                item.setIcon(R.drawable.ic_menu_party_shuffle);
                item.setTitle(R.string.party_shuffle_off);
            } else {
                item.setIcon(R.drawable.ic_menu_party_shuffle);
                item.setTitle(R.string.party_shuffle);
            }
        }
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        Intent intent;
        try {
            switch (item.getItemId()) {
                case GOTO_START:
                    intent = new Intent();
                    intent.setClass(this, MusicBrowserActivity.class);
                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
                            | Intent.FLAG_ACTIVITY_CLEAR_TOP);
                    startActivity(intent);
                    break;
                case USE_AS_RINGTONE: {
                    // Set the system setting to make this the current ringtone
                    if (mService != null) {
                        MusicUtils.setRingtone(this, mService.getAudioId());
                    }
                    return true;
                }
                case PARTY_SHUFFLE:
                    if (mService != null) {
                        int shuffle = mService.getShuffleMode();
                        if (shuffle == MediaPlaybackService.SHUFFLE_AUTO) {
                            mService.setShuffleMode(MediaPlaybackService.SHUFFLE_NONE);
                        } else {
                            mService.setShuffleMode(MediaPlaybackService.SHUFFLE_AUTO);
                        }
                    }
                    setShuffleButtonImage();
                    break;
                    
                case NEW_PLAYLIST: {
                    intent = new Intent();
                    intent.setClass(this, CreatePlaylist.class);
                    startActivityForResult(intent, NEW_PLAYLIST);
                    return true;
                }

                case PLAYLIST_SELECTED: {
                    int [] list = new int[1];
                    list[0] = MusicUtils.getCurrentAudioId();
                    int playlist = item.getIntent().getIntExtra("playlist", 0);
                    MusicUtils.addToPlaylist(this, list, playlist);
                    return true;
                }
                
                case DELETE_ITEM: {
                    if (mService != null) {
                        int [] list = new int[1];
                        list[0] = MusicUtils.getCurrentAudioId();
                        Bundle b = new Bundle();
                        b.putString("description", mService.getTrackName());
                        b.putIntArray("items", list);
                        intent = new Intent();
                        intent.setClass(this, DeleteItems.class);
                        intent.putExtras(b);
                        startActivityForResult(intent, -1);
                    }
                    return true;
                }
            }
        } catch (RemoteException ex) {
        }
        return super.onOptionsItemSelected(item);
    }
    
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        if (resultCode != RESULT_OK) {
            return;
        }
        switch (requestCode) {
            case NEW_PLAYLIST:
                Uri uri = Uri.parse(intent.getAction());
                if (uri != null) {
                    int [] list = new int[1];
                    list[0] = MusicUtils.getCurrentAudioId();
                    int playlist = Integer.parseInt(uri.getLastPathSegment());
                    MusicUtils.addToPlaylist(this, list, playlist);
                }
                break;
        }
    }
    private final int keyboard[][] = {
        {
            KeyEvent.KEYCODE_Q,
            KeyEvent.KEYCODE_W,
            KeyEvent.KEYCODE_E,
            KeyEvent.KEYCODE_R,
            KeyEvent.KEYCODE_T,
            KeyEvent.KEYCODE_Y,
            KeyEvent.KEYCODE_U,
            KeyEvent.KEYCODE_I,
            KeyEvent.KEYCODE_O,
            KeyEvent.KEYCODE_P,
        },
        {
            KeyEvent.KEYCODE_A,
            KeyEvent.KEYCODE_S,
            KeyEvent.KEYCODE_D,
            KeyEvent.KEYCODE_F,
            KeyEvent.KEYCODE_G,
            KeyEvent.KEYCODE_H,
            KeyEvent.KEYCODE_J,
            KeyEvent.KEYCODE_K,
            KeyEvent.KEYCODE_L,
            KeyEvent.KEYCODE_DEL,
        },
        {
            KeyEvent.KEYCODE_Z,
            KeyEvent.KEYCODE_X,
            KeyEvent.KEYCODE_C,
            KeyEvent.KEYCODE_V,
            KeyEvent.KEYCODE_B,
            KeyEvent.KEYCODE_N,
            KeyEvent.KEYCODE_M,
            KeyEvent.KEYCODE_COMMA,
            KeyEvent.KEYCODE_PERIOD,
            KeyEvent.KEYCODE_ENTER
        }

    };

    private int lastX;
    private int lastY;

    private boolean seekMethod1(int keyCode)
    {
        for(int x=0;x<10;x++) {
            for(int y=0;y<3;y++) {
                if(keyboard[y][x] == keyCode) {
                    int dir = 0;
                    // top row
                    if(x == lastX && y == lastY) dir = 0;
                    else if (y == 0 && lastY == 0 && x > lastX) dir = 1;
                    else if (y == 0 && lastY == 0 && x < lastX) dir = -1;
                    // bottom row
                    else if (y == 2 && lastY == 2 && x > lastX) dir = -1;
                    else if (y == 2 && lastY == 2 && x < lastX) dir = 1;
                    // moving up
                    else if (y < lastY && x <= 4) dir = 1; 
                    else if (y < lastY && x >= 5) dir = -1; 
                    // moving down
                    else if (y > lastY && x <= 4) dir = -1; 
                    else if (y > lastY && x >= 5) dir = 1; 
                    lastX = x;
                    lastY = y;
                    try {
                        mService.seek(mService.position() + dir * 5);
                    } catch (RemoteException ex) {
                    }
                    refreshNow();
                    return true;
                }
            }
        }
        lastX = -1;
        lastY = -1;
        return false;
    }

    private boolean seekMethod2(int keyCode)
    {
        if (mService == null) return false;
        for(int i=0;i<10;i++) {
            if(keyboard[0][i] == keyCode) {
                int seekpercentage = 100*i/10;
                try {
                    mService.seek(mService.duration() * seekpercentage / 100);
                } catch (RemoteException ex) {
                }
                refreshNow();
                return true;
            }
        }
        return false;
    }

    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        try {
            switch(keyCode)
            {
                case KeyEvent.KEYCODE_DPAD_LEFT:
                    if (mTrackball) {
                        break;
                    }
                    if (mService != null) {
                        if (!mSeeking && mStartSeekPos >= 0) {
                            mPauseButton.requestFocus();
                            if (mStartSeekPos < 1000) {
                                mService.prev();
                            } else {
                                mService.seek(0);
                            }
                        } else {
                            scanBackward(-1, event.getEventTime() - event.getDownTime());
                            mPauseButton.requestFocus();
                            mStartSeekPos = -1;
                        }
                    }
                    mSeeking = false;
                    mPosOverride = -1;
                    return true;
                case KeyEvent.KEYCODE_DPAD_RIGHT:
                    if (mTrackball) {
                        break;
                    }
                    if (mService != null) {
                        if (!mSeeking && mStartSeekPos >= 0) {
                            mPauseButton.requestFocus();
                            mService.next();
                        } else {
                            scanForward(-1, event.getEventTime() - event.getDownTime());
                            mPauseButton.requestFocus();
                            mStartSeekPos = -1;
                        }
                    }
                    mSeeking = false;
                    mPosOverride = -1;
                    return true;
            }
        } catch (RemoteException ex) {
        }
        return super.onKeyUp(keyCode, event);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event)
    {
        int direction = -1;
        int repcnt = event.getRepeatCount();

        if((seekmethod==0)?seekMethod1(keyCode):seekMethod2(keyCode))
            return true;

        switch(keyCode)
        {
/*
            // image scale
            case KeyEvent.KEYCODE_Q: av.adjustParams(-0.05, 0.0, 0.0, 0.0, 0.0,-1.0); break;
            case KeyEvent.KEYCODE_E: av.adjustParams( 0.05, 0.0, 0.0, 0.0, 0.0, 1.0); break;
            // image translate
            case KeyEvent.KEYCODE_W: av.adjustParams(    0.0, 0.0,-1.0, 0.0, 0.0, 0.0); break;
            case KeyEvent.KEYCODE_X: av.adjustParams(    0.0, 0.0, 1.0, 0.0, 0.0, 0.0); break;
            case KeyEvent.KEYCODE_A: av.adjustParams(    0.0,-1.0, 0.0, 0.0, 0.0, 0.0); break;
            case KeyEvent.KEYCODE_D: av.adjustParams(    0.0, 1.0, 0.0, 0.0, 0.0, 0.0); break;
            // camera rotation
            case KeyEvent.KEYCODE_R: av.adjustParams(    0.0, 0.0, 0.0, 0.0, 0.0,-1.0); break;
            case KeyEvent.KEYCODE_U: av.adjustParams(    0.0, 0.0, 0.0, 0.0, 0.0, 1.0); break;
            // camera translate
            case KeyEvent.KEYCODE_Y: av.adjustParams(    0.0, 0.0, 0.0, 0.0,-1.0, 0.0); break;
            case KeyEvent.KEYCODE_N: av.adjustParams(    0.0, 0.0, 0.0, 0.0, 1.0, 0.0); break;
            case KeyEvent.KEYCODE_G: av.adjustParams(    0.0, 0.0, 0.0,-1.0, 0.0, 0.0); break;
            case KeyEvent.KEYCODE_J: av.adjustParams(    0.0, 0.0, 0.0, 1.0, 0.0, 0.0); break;

*/

            case KeyEvent.KEYCODE_SLASH:
                seekmethod = 1 - seekmethod;
                return true;

            case KeyEvent.KEYCODE_DPAD_LEFT:
                if (mTrackball) {
                    break;
                }
                if (!mPrevButton.hasFocus()) {
                    mPrevButton.requestFocus();
                }
                scanBackward(repcnt, event.getEventTime() - event.getDownTime());
                return true;
            case KeyEvent.KEYCODE_DPAD_RIGHT:
                if (mTrackball) {
                    break;
                }
                if (!mNextButton.hasFocus()) {
                    mNextButton.requestFocus();
                }
                scanForward(repcnt, event.getEventTime() - event.getDownTime());
                return true;

            case KeyEvent.KEYCODE_S:
                toggleShuffle();
                return true;

            case KeyEvent.KEYCODE_DPAD_CENTER:
            case KeyEvent.KEYCODE_SPACE:
                doPauseResume();
                return true;
        }
        return super.onKeyDown(keyCode, event);
    }
    
    private void scanBackward(int repcnt, long delta) {
        if(mService == null) return;
        try {
            if(repcnt == 0) {
                mStartSeekPos = mService.position();
                mLastSeekEventTime = 0;
                mSeeking = false;
            } else {
                mSeeking = true;
                if (delta < 5000) {
                    // seek at 10x speed for the first 5 seconds
                    delta = delta * 10; 
                } else {
                    // seek at 40x after that
                    delta = 50000 + (delta - 5000) * 40;
                }
                long newpos = mStartSeekPos - delta;
                if (newpos < 0) {
                    // move to previous track
                    mService.prev();
                    long duration = mService.duration();
                    mStartSeekPos += duration;
                    newpos += duration;
                }
                if (((delta - mLastSeekEventTime) > 250) || repcnt < 0){
                    mService.seek(newpos);
                    mLastSeekEventTime = delta;
                }
                if (repcnt >= 0) {
                    mPosOverride = newpos;
                } else {
                    mPosOverride = -1;
                }
                refreshNow();
            }
        } catch (RemoteException ex) {
        }
    }

    private void scanForward(int repcnt, long delta) {
        if(mService == null) return;
        try {
            if(repcnt == 0) {
                mStartSeekPos = mService.position();
                mLastSeekEventTime = 0;
                mSeeking = false;
            } else {
                mSeeking = true;
                if (delta < 5000) {
                    // seek at 10x speed for the first 5 seconds
                    delta = delta * 10; 
                } else {
                    // seek at 40x after that
                    delta = 50000 + (delta - 5000) * 40;
                }
                long newpos = mStartSeekPos + delta;
                long duration = mService.duration();
                if (newpos >= duration) {
                    // move to next track
                    mService.next();
                    mStartSeekPos -= duration; // is OK to go negative
                    newpos -= duration;
                }
                if (((delta - mLastSeekEventTime) > 250) || repcnt < 0){
                    mService.seek(newpos);
                    mLastSeekEventTime = delta;
                }
                if (repcnt >= 0) {
                    mPosOverride = newpos;
                } else {
                    mPosOverride = -1;
                }
                refreshNow();
            }
        } catch (RemoteException ex) {
        }
    }
    
    private void doPauseResume() {
        try {
            if(mService != null) {
                if (mService.isPlaying()) {
                    mService.pause();
                } else {
                    mService.play();
                }
                refreshNow();
                setPauseButtonImage();
            }
        } catch (RemoteException ex) {
        }
    }
    
    private void toggleShuffle() {