Android-Activity控制Service的问题

Question

public class PoemMainActivity extends Activity implements OnClickListener {
    // 翻书效果
    private PageWidget mPageWidget;
    Bitmap mCurPageBitmap, mNextPageBitmap;
    Canvas mCurPageCanvas, mNextPageCanvas;
    BookPageFactory pagefactory;

    private PopupWindow mOptionsMenu;// Menu菜单项
    private MyBinder mBinder;
    private Handler mHandler;

    private Intent intent;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        initView();
        initOptionsMenu();
        initBook();
        initHandler();
    }

    @Override
    protected void onStart() {
        super.onStart();
        Intent intent = new Intent(this, MediaPlayService.class);
        bindService(intent, conn, BIND_AUTO_CREATE);
    }

    private ServiceConnection conn = new ServiceConnection() {

        @Override
        public void onServiceDisconnected(ComponentName name) {

        }

        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            mBinder = (MyBinder) service;
        }
    };

    @Override
    protected void onStop() {
        super.onStop();
        unbindService(conn);
    }

    private void initView() {
        // TODO Auto-generated method stub

    }

    private void initHandler() {
        // TODO Auto-generated method stub
        mHandler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                switch (msg.what) {
                default:
                    break;
                }
            }
        };
    }

    private void initBook() {
        // TODO Auto-generated method stub
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        System.out
                .println("屏幕分辨率为:" + dm.widthPixels + " * " + dm.heightPixels);
        mPageWidget = new PageWidget(this, dm.widthPixels, dm.heightPixels);
        setContentView(mPageWidget);
        mCurPageBitmap = Bitmap.createBitmap(dm.widthPixels, dm.heightPixels,
                Bitmap.Config.ARGB_8888);
        mNextPageBitmap = Bitmap.createBitmap(dm.widthPixels, dm.heightPixels,
                Bitmap.Config.ARGB_8888);

        mCurPageCanvas = new Canvas(mCurPageBitmap);
        mNextPageCanvas = new Canvas(mNextPageBitmap);
        pagefactory = new BookPageFactory(dm.widthPixels, dm.heightPixels);
        pagefactory.setBgBitmap(BitmapFactory.decodeResource(
                this.getResources(), R.drawable.back));
        intent = getIntent();
        Bundle bundleExtra = intent.getBundleExtra("Bundle");
        String parent = bundleExtra.getString("parent");
        String childern = bundleExtra.getString("childern");
        try {
            if ("0".equals(parent) && "0".equals(childern)) {
                pagefactory.openbook("/sdcard/1.txt");
            } else {
                pagefactory.openbook("/sdcard/2.txt");
            }
            pagefactory.onDraw(mCurPageCanvas);
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
            Toast.makeText(this, "电子书不存在", Toast.LENGTH_SHORT).show();
        }

        mPageWidget.setBitmaps(mCurPageBitmap, mCurPageBitmap);

        mPageWidget.setOnTouchListener(new OnTouchListener() {
            @Override
            public boolean onTouch(View v, MotionEvent e) {
                // TODO Auto-generated method stub

                boolean ret = false;
                if (v == mPageWidget) {
                    if (e.getAction() == MotionEvent.ACTION_DOWN) {
                        mPageWidget.abortAnimation();
                        mPageWidget.calcCornerXY(e.getX(), e.getY());

                        pagefactory.onDraw(mCurPageCanvas);
                        if (mPageWidget.DragToRight()) {
                            try {
                                pagefactory.prePage();
                            } catch (IOException e1) {
                                // TODO Auto-generated catch block
                                e1.printStackTrace();
                            }
                            if (pagefactory.isfirstPage())
                                return false;
                            pagefactory.onDraw(mNextPageCanvas);
                        } else {
                            try {
                                pagefactory.nextPage();
                            } catch (IOException e1) {
                                // TODO Auto-generated catch block
                                e1.printStackTrace();
                            }
                            if (pagefactory.islastPage())
                                return false;
                            pagefactory.onDraw(mNextPageCanvas);
                        }
                        mPageWidget.setBitmaps(mCurPageBitmap, mNextPageBitmap);
                    }

                    ret = mPageWidget.doTouchEvent(e);
                    return ret;
                }
                return false;
            }

        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        if (mOptionsMenu.isShowing()) {
            mOptionsMenu.dismiss();
        } else {
            mOptionsMenu.showAtLocation(mPageWidget, Gravity.BOTTOM, 0, 0);
        }
        return false;
    }

    private void initOptionsMenu() {
        View contentView = LayoutInflater.from(this).inflate(
                R.layout.optionsmenu, null);
        // 为popupwindow增加监听时间
        ImageView imgViewBack = (ImageView) contentView
                .findViewById(R.id.menu_back);
        imgViewBack.setOnClickListener(this);
        ImageView imgViewHome = (ImageView) contentView
                .findViewById(R.id.menu_home);
        imgViewHome.setOnClickListener(this);
        View viewClick = (View) contentView.findViewById(R.id.menu_view);
        viewClick.setOnClickListener(this);
        ImageView imgViewWitness = (ImageView) contentView
                .findViewById(R.id.menu_witness);
        imgViewWitness.setOnClickListener(this);
        ImageView imgViewDownLoad = (ImageView) contentView
                .findViewById(R.id.menu_download);
        imgViewDownLoad.setOnClickListener(this);
        ImageView imgViewSound = (ImageView) contentView
                .findViewById(R.id.menu_sound);
        imgViewSound.setOnClickListener(this);
        ImageView imgViewStop = (ImageView) contentView
                .findViewById(R.id.menu_stop);
        imgViewStop.setOnClickListener(this);
        ImageView imgViewProgress = (ImageView) contentView
                .findViewById(R.id.menu_progress);
        imgViewProgress.setOnClickListener(this);
        ImageView imgViewBook = (ImageView) contentView
                .findViewById(R.id.menu_book);
        imgViewBook.setOnClickListener(this);
        ImageView imgViewMore = (ImageView) contentView
                .findViewById(R.id.menu_more);
        imgViewMore.setOnClickListener(this);
        mOptionsMenu = new PopupWindow(contentView, LayoutParams.MATCH_PARENT,
                LayoutParams.WRAP_CONTENT);
        mOptionsMenu.setAnimationStyle(android.R.style.Animation_Dialog);
        mOptionsMenu.update();
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            if (mOptionsMenu.isShowing()) {
                mOptionsMenu.dismiss();
                return true;
            }
        }
        return super.onKeyDown(keyCode, event);
    }

    @Override
    protected void onPause() {
        super.onPause();
        mOptionsMenu.dismiss();
    }

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        switch (v.getId()) {
        case R.id.menu_back:
            Toast.makeText(this, "BACK", 1).show();
            break;
        case R.id.menu_home:
            Toast.makeText(this, "HOME", 1).show();
            break;
        case R.id.menu_witness:
            Toast.makeText(this, "WITNESS", 1).show();
            break;
        case R.id.menu_download:
            downlaodSong();
            break;
        case R.id.menu_sound:
            togglePlay();
            break;
        case R.id.menu_stop:
            Toast.makeText(this, "STOP", 1).show();
            break;
        case R.id.menu_progress:
            Toast.makeText(this, "PROGRESS", 1).show();
            break;
        case R.id.menu_book:
            Toast.makeText(this, "BOOK", 1).show();
            break;
        case R.id.menu_more:
            Toast.makeText(this, "MORE", 1).show();
            break;
        default:
            break;
        }
        mOptionsMenu.dismiss();
    }

    private void downlaodSong() {
        Toast.makeText(PoemMainActivity.this, "开始下载", 1).show();
        new UpgradeAsyncTask()
                .execute("http://192.168.1.131/wirelessOrder/api/music/23");
    }

    private class UpgradeAsyncTask extends AsyncTask<String, Void, Void> {

        @Override
        protected Void doInBackground(String... params) {
            String url;
            try {
                url = params[0];
                FileOutputStream fos = null;
                InputStream is = null;
                URL downloadUrl = new URL(url);
                HttpURLConnection conn = (HttpURLConnection) downloadUrl
                        .openConnection();
                conn.setReadTimeout(5000);
                conn.connect();
                int fileLength = conn.getContentLength();
                if (HttpURLConnection.HTTP_OK != conn.getResponseCode()) {
                    return null;
                }
                is = conn.getInputStream();
                byte[] buffer = new byte[1024];
                File file = new File(Constant.DIR_PATH, "23.mp3");
                File parentFile = file.getParentFile();
                if (!parentFile.exists()) {
                    boolean mkdirs = parentFile.mkdirs();
                    boolean newFile = file.createNewFile();
                    Log.d("download", "mkdirs : " + mkdirs + " newFile : "
                            + newFile);
                }
                fos = new FileOutputStream(file);
                int loadedLength = 0;
                int len = 0;
                while ((len = is.read(buffer)) != -1) {
                    fos.write(buffer, 0, len);
                }
            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (FileNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            Toast.makeText(PoemMainActivity.this, "下载结束", 1).show();
            super.onPostExecute(result);
        }
    }

    private void togglePlay() {
        mBinder.continuePlay();
    }
}

Answer 1

( ⊙ o ⊙ )啊！！！ 这位大哥贴这个这串代码，看得头都疼了。。 看到了后面发现是服务绑定的问题 呵呵。代码写的不错，学习了。 剑波兄的答案，不怎么认可，bindService 这个，如果服务没有启动，会自动startservice， 我举得不存在 没有调用 startservice。服务能否绑定成功，跟androidManifest.xml 中的注册还是有关系的
<service android:name="com.mumayi.market.service.XXService"></service>
这样注册还可以写上很多的属性，如果你不是很明白建议这么写就足够了， 有个属性能让服务不被绑定，不过我忘了是啥了。。。你可以弄清楚在写。
另外还有一点，服务的绑定，是一个异步的操作，并非前一句代码绑定，后一句代码就能里面的绑定成功。 建议以这两点为出发点去思考下吧， 你代码太多。。这样看是在太累了。。。o(>﹏<)o

Answer 2

没有调用startservice启动服务,
@Override
public IBinder onBind(Intent intent) {
mBinder = new MyBinder();//删掉这句
return mBinder;
}

因为oncreate里面已经创建了。