android.os.storage.StorageVolume#isRemovable ( )源码实例Demo

public static void updateUsbOtg(final Context context) {
    if (Build.VERSION.SDK_INT < 24) {
        return;
    }
    if (swapView == null) {
        Utils.debugLog(TAG, "swapView == null");
        return;
    }
    TextView storageVolumeText = swapView.findViewById(R.id.storage_volume_text);
    Button requestStorageVolume = swapView.findViewById(R.id.request_storage_volume_button);
    storageVolumeText.setVisibility(View.GONE);
    requestStorageVolume.setVisibility(View.GONE);

    final StorageManager storageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);
    for (final StorageVolume storageVolume : storageManager.getStorageVolumes()) {
        if (storageVolume.isRemovable() && !storageVolume.isPrimary()) {
            Log.i(TAG, "StorageVolume: " + storageVolume);
            final Intent intent = storageVolume.createAccessIntent(null);
            if (intent == null) {
                Utils.debugLog(TAG, "Got null Storage Volume access Intent");
                return;
            }
            storageVolumeText.setVisibility(View.VISIBLE);

            String text = storageVolume.getDescription(context);
            if (!TextUtils.isEmpty(text)) {
                requestStorageVolume.setText(text);
                UsbDevice usb = intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
                if (usb != null) {
                    text = String.format("%s (%s %s)", text, usb.getManufacturerName(), usb.getProductName());
                    Toast.makeText(context, text, Toast.LENGTH_LONG).show();
                }
            }

            requestStorageVolume.setVisibility(View.VISIBLE);
            requestStorageVolume.setOnClickListener(new View.OnClickListener() {
                @Override
                @RequiresApi(api = 24)
                public void onClick(View v) {
                    List<UriPermission> list = context.getContentResolver().getPersistedUriPermissions();
                    if (list != null) for (UriPermission uriPermission : list) {
                        Uri uri = uriPermission.getUri();
                        if (uri.getPath().equals(String.format("/tree/%s:", storageVolume.getUuid()))) {
                            intent.setData(uri);
                            TreeUriScannerIntentService.onActivityResult(context, intent);
                            return;
                        }
                    }
                    ((Activity) context).startActivityForResult(intent,
                        MainActivity.REQUEST_STORAGE_ACCESS);
                }
            });
        }
    }
}
 

/**
 * Returns whether the shared/external storage media at the given path is
 * physically removable.
 *
 * @return true if the storage device can be removed (such as an SD card),
 *         or false if the storage device is built in and cannot be
 *         physically removed.
 * @throws IllegalArgumentException if the path is not a valid storage
 *             device.
 */
public static boolean isExternalStorageRemovable(File path) {
    final StorageVolume volume = StorageManager.getStorageVolume(path, UserHandle.myUserId());
    if (volume != null) {
        return volume.isRemovable();
    } else {
        throw new IllegalArgumentException("Failed to find storage device at " + path);
    }
}