接上一篇，如今分析android\vendor\qcom\opensource\fm\fmapp2\src\com\caf\fmradio\StationListActivity.java
protectedvoid onCreate(Bundle savedInstanceState)办法里
绑定FMRadioService办事
bindService((newIntent()).setClass(this, FMRadioService.class), osc, 0);
实例化ListView对象
mStationList= (ListView) findViewById(R.id.station_list);
高低文菜单监听事宜
 mStationList.setOnCreateContextMenuListener(this);
ListView监听每个Item事宜
mStationList.setOnItemClickListener(newOnItemClickListener()
调用mService.tune((int)((fFreq * 1000)));办法调频
 

<span style="font-family:KaiTi_GB2312;font-size:18px;">protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.station_list);
        bindService((new Intent()).setClass(this, FMRadioService.class), osc, 0);

        mStationList = (ListView) findViewById(R.id.station_list);
        // mPresetList = new PresetList("StationList");
        mStationList.setOnCreateContextMenuListener(this);
        mStationList.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                    long arg3) {
                String freq = ((HashMap<String, String>) mAdapter.getItem(arg2))
                        .get("freq");
                Float fFreq = Float.parseFloat(freq);
                if (mService != null) {
                    try {mService.tune((int) ((fFreq * 1000)));
                        finish();
                    } catch (RemoteException e) {
                        e.printStackTrace();
                    }
                } else {
                    Log.d(LOGTAG, "mService is null........");
                }
            }
        });
    }</span>

高低文菜单
 public void onCreateContextMenu(ContextMenumenu, View v,ContextMenuInfo menuInfo)
添加大年夜定名和删除功能
menu.add(0,CONTEXT_MENU_RENAME, 0, getString(R.string.preset_rename));
menu.add(0,CONTEXT_MENU_DELETE, 0, getString(R.string.preset_delete));
标题
menu.setHeaderTitle(getString(R.string.station_name)+getNameFromId(mItemId));
 

<span style="font-family:KaiTi_GB2312;font-size:18px;">public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        // TODO Auto-generated method stub
        AdapterContextMenuInfo mi = (AdapterContextMenuInfo) menuInfo;
        menu.add(0, CONTEXT_MENU_RENAME, 0, getString(R.string.preset_rename));
        menu.add(0, CONTEXT_MENU_DELETE, 0, getString(R.string.preset_delete));
        mItemId = mi.position;
        menu.setHeaderTitle(getString(R.string.station_name)+getNameFromId(mItemId));
    }</span>

<span style="font-family:KaiTi_GB2312;font-size:18px;">protected void onPrepareDialog(int id, Dialog dialog, Bundle b) {
        // TODO Auto-generated method stub
        // super.onPrepareDialog(id, dialog);
        // After change system language, current function will be executed before
        // onResume , so execute load to ensure adapter is not null.
        load();
        switch (id) {
        case DIALOG_RENAME_ID:
            mRenameDialog.setTitle(getString(R.string.station_name)+getNameFromId(mItemId));
            final EditText editText = (EditText) mRenameDialog
                    .findViewById(R.id.name);
			
            editText.setText(getNameFromId(mItemId));
            Button bOk = (Button) mRenameDialog.findViewById(R.id.save);

            bOk.setOnClickListener(new View.OnClickListener() {@Override
                public void onClick(View v) {
                    String rename = editText.getText().toString();
                    if (TextUtils.isEmpty(rename) || TextUtils.isEmpty(rename.trim())) {
                        Context context = getApplicationContext();
                        Toast toast = Toast.makeText(context, getString(R.string.station_name_empty),
                                Toast.LENGTH_SHORT);
                        toast.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL, 0, 0);
                        toast.show();
                    } else if (stationNameExist(rename)) {
                        Context context = getApplicationContext();
                        Toast toast = Toast.makeText(context,
                                getString(R.string.station_name_exist, rename), Toast.LENGTH_SHORT);
                        toast.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL, 0, 0);
                        toast.show();
                    } else {
                        saveStationName(mItemId,rename);
                        mRenameDialog.dismiss();
                    }
                }

            });Button bCancel = (Button) mRenameDialog.findViewById(R.id.cancel);
            bCancel.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    mRenameDialog.dismiss();
                }
            });
            break;
        case DIALOG_DELETE_ID:
            mDeleteDialog.setTitle(getString(R.string.station_list_delete_station, getNameFromId(mItemId)));
            TextView prompt = (TextView) mDeleteDialog.findViewById(R.id.prompt);
            prompt.setText(getString(R.string.station_list_delete_station_prompt,getNameFromId(mItemId)));
            Button bDelete = (Button) mDeleteDialog.findViewById(R.id.delete);

            bDelete.setOnClickListener(new View.OnClickListener() {@Override
                public void onClick(View v) {
                    deleteStation(mItemId);
                    mDeleteDialog.dismiss();
                }
            });
            Button bCancelDelete = (Button) mDeleteDialog.findViewById(R.id.cancel);
            bCancelDelete.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mDeleteDialog.dismiss();
                }
            });
            break;
        }
    }</span>

断定电台名字是否存在
privateboolean stationNameExist(String name)
 

<span style="font-family:KaiTi_GB2312;font-size:18px;">private boolean stationNameExist(String name) {
        for (HashMap<String, String> item : list) {
            if (item != null && name.equals(item.get("name"))) {
                return true;
            }
        }
        return false;
    }</span>

重定名保存办法
saveStationName(mItemId,rename);
mRenameDialog.dismiss();

<span style="font-family:KaiTi_GB2312;font-size:18px;">private void saveStationName(int id, String name) {
        Integer stationIndex = mIndex.get(new Integer(id));
        SharedPreferences sp = getSharedPreferences(
                FMRadio.SCAN_STATION_PREFS_NAME, 0);
        SharedPreferences.Editor editor = sp.edit();
        editor .putString(FMRadio.STATION_NAME + (stationIndex.intValue()), name);
        editor.commit();
        load();
    }
</span>

 
删除电台办法
 deleteStation(mItemId);
 mDeleteDialog.dismiss()；
 

<span style="font-family:KaiTi_GB2312;font-size:18px;"> private void deleteStation(int id) {
        SharedPreferences sp = getSharedPreferences( FMRadio.SCAN_STATION_PREFS_NAME, 0);
        Integer stationIndex = mIndex.get(new Integer(id));
        SharedPreferences.Editor editor = sp.edit();
        editor.remove(FMRadio.STATION_NAME + (stationIndex));
        editor.remove(FMRadio.STATION_FREQUENCY + (stationIndex));
        editor.commit();
        load();
    }</span>

 
经由过程调用SharedPreferences保存名字后加载 load();

<span style="font-family:KaiTi_GB2312;font-size:18px;">protected void load() {
        list.clear();
        mIndex.clear();
        SharedPreferences sp = getSharedPreferences(FMRadio.SCAN_STATION_PREFS_NAME, 0);
        int station_number = sp.getInt(FMRadio.NUM_OF_STATIONS, 0);
        for (int i = 1; i <= station_number; i++) {
            HashMap<String, String> item = new HashMap<String, String>();
            String name = sp.getString(FMRadio.STATION_NAME + i, "");

            int frequency = sp.getInt(FMRadio.STATION_FREQUENCY + i, 0);

            if (!name.equals("") && frequency != 0) {
                item.put("name", name); item.put("freq", String.valueOf(frequency / 1000.0f));
                mIndex.put(new Integer(list.size()), new Integer(i));
                list.add(item);
            }
        }

        mAdapter = new SimpleAdapter(this, list, R.layout.station_list_item,
                new String[] { "name", "freq" }, new int[] { R.id.name,
                        R.id.freq });

        mStationList.setAdapter(mAdapter);
    }</span>

办法
privatevoid saveStationName(int id, String name)
editor.putString(FMRadio.STATION_NAME+ (stationIndex.intValue()),
 
privatevoid deleteStation(int id) 删除办法，删除名字和频率
 editor.remove(FMRadio.STATION_NAME +(stationIndex));
 editor.remove(FMRadio.STATION_FREQUENCY +(stationIndex));
 
以id获取频率办法
privateint getFrequencyFromId(int id)
 

<span style="font-family:KaiTi_GB2312;font-size:18px;">private int getFrequencyFromId(int id) {
        String freq = ((HashMap<String, String>) mAdapter.getItem(id))
                .get("freq");
        Float fFreq = Float.parseFloat(freq);
        return (int) ((fFreq * 1000));
    }</span>

以Id获取频率名字办法
privateString getNameFromId(int id)
 

<span style="font-family:KaiTi_GB2312;font-size:18px;"> private String getNameFromId(int id) {
        String name = ((HashMap<String, String>) mAdapter.getItem(id))
                .get("name");
        return name;

    }</span>

加载办法，清除ListView列表内容和索引id,大年夜SharedPreferences里获取频道个数
应用for轮回将xml数据（电台名字和频率）添加list列表里应用SimpleAdapter将数据显示在UI界面里
protected void load() {
               item.put("name", name);
                item.put("freq",String.valueOf(frequency / 1000.0f));
                mIndex.put(newInteger(list.size()), new Integer(i));
                list.add(item);
}
 
mAdapter= new SimpleAdapter(this, list, R.layout.station_list_item,
                new String[] {"name", "freq" }, new int[] { R.id.name,
                        R.id.freq });
 
在StationListActivity类的onDestroy() 办法对FMRadioService办事解绑。
unbindService(osc);

<span style="font-family:KaiTi_GB2312;font-size:18px;">protected void onDestroy() {
        unbindService(osc);
        mService = null;
        super.onDestroy();
    }
</span>