Example usage for android.os Environment MEDIA_SHARED

Introduction

In this page you can find the example usage for android.os Environment MEDIA_SHARED.

Prototype

String MEDIA_SHARED

To view the source code for android.os Environment MEDIA_SHARED.

Click Source Link

Document

Storage state if the media is present not mounted, and shared via USB mass storage.

Usage

From source file:com.android.server.MountService.java

private void notifyShareAvailabilityChange(final boolean avail) {
    synchronized (mListeners) {
        mUmsAvailable = avail;/*from   ww w.  j a va  2  s .  c  o m*/
        for (int i = mListeners.size() - 1; i >= 0; i--) {
            MountServiceBinderListener bl = mListeners.get(i);
            try {
                bl.mListener.onUsbMassStorageConnectionChanged(avail);
            } catch (RemoteException rex) {
                Slog.e(TAG, "Listener dead");
                mListeners.remove(i);
            } catch (Exception ex) {
                Slog.e(TAG, "Listener failed", ex);
            }
        }
    }

    if (mSystemReady == true) {
        sendUmsIntent(avail);
    } else {
        mSendUmsConnectedOnBoot = avail;
    }

    final StorageVolume primary = getPrimaryPhysicalVolume();
    if (avail == false && primary != null
            && Environment.MEDIA_SHARED.equals(getVolumeState(primary.getPath()))) {
        final String path = primary.getPath();
        /*
         * USB mass storage disconnected while enabled
         */
        new Thread("MountService#AvailabilityChange") {
            @Override
            public void run() {
                try {
                    int rc;
                    Slog.w(TAG, "Disabling UMS after cable disconnect");
                    doShareUnshareVolume(path, "ums", false);
                    if ((rc = doMountVolume(path)) != StorageResultCode.OperationSucceeded) {
                        Slog.e(TAG, String.format("Failed to remount {%s} on UMS enabled-disconnect (%d)", path,
                                rc));
                    }
                } catch (Exception ex) {
                    Slog.w(TAG, "Failed to mount media on UMS enabled-disconnect", ex);
                }
            }
        }.start();
    }
}

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From source file:com.android.server.MountService.java

public void shutdown(final IMountShutdownObserver observer) {
    validatePermission(android.Manifest.permission.SHUTDOWN);

    Slog.i(TAG, "Shutting down");
    synchronized (mVolumesLock) {
        // Get all volumes to be unmounted.
        MountShutdownLatch mountShutdownLatch = new MountShutdownLatch(observer, mVolumeStates.size());

        for (String path : mVolumeStates.keySet()) {
            String state = mVolumeStates.get(path);

            if (state.equals(Environment.MEDIA_SHARED)) {
                /*/* ww w.j  a v  a2  s.co  m*/
                 * If the media is currently shared, unshare it.
                 * XXX: This is still dangerous!. We should not
                 * be rebooting at *all* if UMS is enabled, since
                 * the UMS host could have dirty FAT cache entries
                 * yet to flush.
                 */
                setUsbMassStorageEnabled(false);
            } else if (state.equals(Environment.MEDIA_CHECKING)) {
                /*
                 * If the media is being checked, then we need to wait for
                 * it to complete before being able to proceed.
                 */
                // XXX: @hackbod - Should we disable the ANR timer here?
                int retries = 30;
                while (state.equals(Environment.MEDIA_CHECKING) && (retries-- >= 0)) {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException iex) {
                        Slog.e(TAG, "Interrupted while waiting for media", iex);
                        break;
                    }
                    state = Environment.getExternalStorageState();
                }
                if (retries == 0) {
                    Slog.e(TAG, "Timed out waiting for media to check");
                }
            }

            if (state.equals(Environment.MEDIA_MOUNTED)) {
                // Post a unmount message.
                ShutdownCallBack ucb = new ShutdownCallBack(path, mountShutdownLatch);
                mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, ucb));
            } else if (observer != null) {
                /*
                 * Count down, since nothing will be done. The observer will be
                 * notified when we are done so shutdown sequence can continue.
                 */
                mountShutdownLatch.countDown();
                Slog.i(TAG, "Unmount completed: " + path + ", result code: "
                        + StorageResultCode.OperationSucceeded);
            }
        }
    }
}

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From source file:com.android.server.MountService.java

public void unmountVolume(String path, boolean force, boolean removeEncryption) {
    validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);
    waitForReady();/*from   w  ww  . java  2 s  . co m*/

    String volState = getVolumeState(path);
    if (DEBUG_UNMOUNT) {
        Slog.i(TAG, "Unmounting " + path + " force = " + force + " removeEncryption = " + removeEncryption);
    }
    if (Environment.MEDIA_UNMOUNTED.equals(volState) || Environment.MEDIA_REMOVED.equals(volState)
            || Environment.MEDIA_SHARED.equals(volState) || Environment.MEDIA_UNMOUNTABLE.equals(volState)) {
        // Media already unmounted or cannot be unmounted.
        // TODO return valid return code when adding observer call back.
        return;
    }
    UnmountCallBack ucb = new UnmountCallBack(path, force, removeEncryption);
    mHandler.sendMessage(mHandler.obtainMessage(H_UNMOUNT_PM_UPDATE, ucb));
}

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