public class UsbReceiver extends BroadcastReceiver {

    private static final String TAG = "UsbReceiver";

    private static final String ASK_ON_PLUG = "ask_on_plug";

    private static final String sInecm = SystemProperties.get(TelephonyProperties.PROPERTY_INECM_MODE, "false");

    private StorageManager mStorageManager = null;

    private UsbManager mUsbManager;

    private static boolean mMeidaMountStatus;

    private SharedPreferences mSharedPre;

    private SharedPreferences.Editor mEeditor;

    @Override

    public void onReceive(Context context, Intent intent) {

        String action = intent.getAction();

        mStorageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);

        mUsbManager = (UsbManager)context.getSystemService(Context.USB_SERVICE);

        mSharedPre = context.getSharedPreferences("com.android.settings_preferences", 0);

        mEeditor = mSharedPre.edit();

        if (UsbManager.ACTION_USB_STATE.equals(action) ){

            onUsbStateReceive(context, intent);

        } else if (Intent.ACTION_MEDIA_MOUNTED.equals(action)) {

            onMediaMountedReceive(context, intent);

        }

    }



    private void onMediaMountedReceive(Context context, Intent intent) {

        boolean usb_connected = mSharedPre.getBoolean("usbState", false);

        

        if(usb_connected && context.getResources().getBoolean(R.bool.usb_mass_storage_mode_enable)

            && UsbManager.USB_FUNCTION_MASS_STORAGE.equals(mUsbManager.getDefaultFunction())) {

            popUsbDialog(context);

        } else {

            return;//do nothing

        }

    }

    

    private void popUsbDialog(Context context) {

    	boolean usb_connected = mSharedPre.getBoolean("usbState", false);

    	String sdcardState = Environment.getSDCardStorageState();

        if (usb_connected

        		&& (sdcardState.equals(Environment.MEDIA_MOUNTED) || sdcardState.equals(Environment.MEDIA_MOUNTED_READ_ONLY))

                && UsbManager.USB_FUNCTION_MASS_STORAGE.equals(mUsbManager.getDefaultFunction())

                && !mStorageManager.isUsbMassStorageEnabled()

                && (Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.DEVICE_PROVISIONED, 0) == 1)

                && context.getResources().getBoolean(R.bool.usb_mass_storage_mode_enable) ) {

            Intent i = new Intent();

            i.setClassName(context, "com.android.settings.MassStorageDialogActivity");

            i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

            context.startActivity(i);

        }

    }

    

    private void onUsbStateReceive(Context context, Intent intent) {

        boolean usb_connected = intent.getBooleanExtra(UsbManager.USB_CONFIGURED, false);

        final ContentResolver cr = context.getContentResolver();

        mEeditor.putBoolean("usbState", usb_connected);

        mEeditor.commit();



        boolean changed = false;

        boolean preState = mSharedPre.getBoolean("preState", false);

        String progress = SystemProperties.get("vold.encrypt_progress");

        if ((progress != null) && !progress.isEmpty())  {

            return;

        }

        if (usb_connected != preState) {

            changed = true;

        }

        KeyguardManager kgm =

            (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);

        if (sInecm.equals("false")

                && usb_connected && changed && !preState

                && (1 == Settings.System.getInt(cr, UsbReceiver.ASK_ON_PLUG, 1))

                && !kgm.inKeyguardRestrictedInputMode()) {

            mEeditor.putBoolean("preState", true);

            mEeditor.commit();

            //注意这里,我这里处理的方式是当USB连接上了android设备，我就跳转到设置的UsbSettings界面，LZ可以参考我的代码自己来修改           

            context.startActivity(Intent.makeRestartActivityTask(

               new ComponentName("com.android.settings","com.android.settings.UsbSettings")));

        } else if (!usb_connected) {

            mEeditor.putBoolean("preState", false);

            mEeditor.commit();

        }

        String usbType = SystemProperties.get("persist.sys.usb.config", "");

        if (usbType != null) {

            UsbSettings.writeSuitestate(mUsbManager.getDefaultFunction());

        }

              

        if (UsbManager.USB_FUNCTION_MASS_STORAGE.equals(mUsbManager.getDefaultFunction())

            && context.getResources().getBoolean(R.bool.usb_mass_storage_mode_enable)) {

            if (usb_connected){

                popUsbDialog(context);

            } else {

            	if (mStorageManager.isUsbMassStorageEnabled()) {

            		mStorageManager.disableUsbMassStorage();

            	}

            }

        }

    }

}

if(BuildConfig.DEBUG)