public class MyService extends Service {    private static final String TAG = "MyService";    File imagepath;    @Override    public IBinder onBind(Intent intent) {        return null;    }    @Override    public void onCreate() {        super.onCreate();        Log.i(TAG, "服务启动...");        // 在IntentFilter中选择你要监听的行为        IntentFilter intentFilter = new IntentFilter(Intent.ACTION_MEDIA_MOUNTED);// sd卡被插入，且已经挂载        intentFilter.setPriority(1000);// 设置最高优先级        intentFilter.addAction(Intent.ACTION_MEDIA_UNMOUNTED);// sd卡存在，但还没有挂载        intentFilter.addAction(Intent.ACTION_MEDIA_REMOVED);// sd卡被移除        intentFilter.addAction(Intent.ACTION_MEDIA_SHARED);// sd卡作为 USB大容量存储被共享，挂载被解除        intentFilter.addAction(Intent.ACTION_MEDIA_BAD_REMOVAL);// sd卡已经从sd卡插槽拔出，但是挂载点还没解除        intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_STARTED);// 开始扫描        intentFilter.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED);// 扫描完成        intentFilter.addDataScheme("file");        registerReceiver(broadcastRec, intentFilter);// 注册监听函数        Log.i(TAG, "sd状态改变");    }    private final BroadcastReceiver broadcastRec = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            String action = intent.getAction();            if (action.equals("android.intent.action.MEDIA_MOUNTED"))// SD            // 卡已经成功挂载            {                imagepath = android.os.Environment.getExternalStorageDirectory();// 你的SD卡路径                Toast.makeText(MyService.this, "我的卡已经成功挂载", 0).show();            } else if (action.equals("android.intent.action.MEDIA_REMOVED")// 各种未挂载状态                    || action.equals("android.intent.action.ACTION_MEDIA_UNMOUNTED")                    || action.equals("android.intent.action.ACTION_MEDIA_BAD_REMOVAL")) {                imagepath = android.os.Environment.getDataDirectory();// 你的本地路径                Toast.makeText(MyService.this, "我的各种未挂载状态", 0).show();            }else if (action.equals(Intent.ACTION_MEDIA_SCANNER_STARTED)){//开始扫描                Toast.makeText(MyService.this, "开始扫描...", 0).show();            }else if (action.equals(Intent.ACTION_MEDIA_SCANNER_FINISHED)){//扫描完成                Toast.makeText(MyService.this, "扫描完成...", 0).show();            }else if (action.equals(Intent.ACTION_MEDIA_SHARED)){//扩展介质的挂载被解除 (unmount)。因为它已经作为 USB 大容量存储被共享                Toast.makeText(MyService.this, " USB 大容量存储被共享...", 0).show();            }else {                Toast.makeText(MyService.this, "其他状态...", 0).show();            }            Log.i(TAG, "imagepath---" + imagepath);        }    };        public void onDestroy() {        unregisterReceiver(broadcastRec);//取消注册    };}

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="cn.ls"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk android:minSdkVersion="10" />    <!-- 在SDCard中创建与删除文件权限 -->    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />    <!-- 往SDCard写入数据权限 -->    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    <application        android:icon="@drawable/ic_launcher"        android:label="@string/app_name" >        <activity            android:name=".Android_sdcActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>                         <!-- 注册服务 -->        <service android:name=".service.MyService">            <intent-filter>                <action android:name="cn.ls.service.myservice.action" />                <category android:name="android.intent.category.DEFAULT" />            </intent-filter>        </service>        <!-- 在SDCard中创建与删除文件权限 -->    </application></manifest>