[android] アプリからマウント、アンマウントする

gistfile1.java

/* mydroid/packages/apps/などの下でビルドする
 *
 */

import android.os.IBinder;
import android.os.RemoteException;
import android.os.ServiceManager;        // SDKでは公開されていない
import android.os.storage.IMountService; // SDKでは公開されていない


private static final String MOUNT_POINT = "/mnt/ext_usb" or "/mnt/sdcard/" ...
private IMountService mMountService = null;

private synchronized IMountService getMountService() {
    if (mMountService == null) {
        IBinder service = ServiceManager.getService("mount");
        if (service != null) {
            mMountService = IMountService.Stub.asInterface(service);
        } else {
            Log.e(TAG, "Can't get mount service");
        }
    }
    return mMountService;
}

private void mount() {
    IMountService mountService = getMountService();
    try {
        if (mountService != null) {
            mountService.mountVolume(MOUNT_POINT);
        } else {
            //
        }
    } catch (RemoteException ex) {
        // Not much can be done
    }
}

private void unmount() {
    StorageManager sm = (StorageManager) getSystemService(Context.STORAGE_SERVICE);
    String state = sm.getVolumeState(MOUNT_POINT);
    if (!Environment.MEDIA_MOUNTED.equals(state) &&
            !Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
        //
        return;
    }

    IMountService mountService = getMountService();
    try {
        if (mountService != null) {
            mountService.unmountVolume(MOUNT_POINT, true, false);
        } else {
            Log.e(TAG, "Mount service is null, can't unmount");
        }
    } catch (RemoteException ex) {
        // Not much can be done
    }
}