| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.documentsui; |
| |
| import static android.os.Environment.isStandardDirectory; |
| import static com.android.documentsui.Shared.DEBUG; |
| |
| import android.app.Activity; |
| import android.app.AlertDialog; |
| import android.app.Dialog; |
| import android.app.DialogFragment; |
| import android.app.FragmentManager; |
| import android.app.FragmentTransaction; |
| import android.content.ContentProviderClient; |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.content.DialogInterface; |
| import android.content.DialogInterface.OnClickListener; |
| import android.content.Intent; |
| import android.content.pm.PackageManager; |
| import android.content.pm.PackageManager.NameNotFoundException; |
| import android.net.Uri; |
| import android.os.Bundle; |
| import android.os.RemoteException; |
| import android.os.UserHandle; |
| import android.os.storage.StorageManager; |
| import android.os.storage.VolumeInfo; |
| import android.provider.DocumentsContract; |
| import android.text.TextUtils; |
| import android.util.Log; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.List; |
| |
| /** |
| * Activity responsible for handling {@link Intent#ACTION_OPEN_EXTERNAL_DOCUMENT}. |
| */ |
| public class OpenExternalDirectoryActivity extends Activity { |
| private static final String TAG = "OpenExternalDirectory"; |
| private static final String FM_TAG = "open_external_directory"; |
| private static final String EXTERNAL_STORAGE_AUTH = "com.android.externalstorage.documents"; |
| private static final String EXTRA_FILE = "com.android.documentsui.FILE"; |
| private static final String EXTRA_APP_LABEL = "com.android.documentsui.APP_LABEL"; |
| private static final String EXTRA_VOLUME_LABEL = "com.android.documentsui.VOLUME_LABEL"; |
| |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| |
| final Intent intent = getIntent(); |
| if (intent == null || intent.getData() == null) { |
| Log.d(TAG, "missing intent or intent data: " + intent); |
| setResult(RESULT_CANCELED); |
| finish(); |
| return; |
| } |
| |
| final String path = intent.getData().getPath(); |
| final int userId = UserHandle.myUserId(); |
| if (!showFragment(this, userId, path)) { |
| setResult(RESULT_CANCELED); |
| finish(); |
| return; |
| } |
| } |
| |
| /** |
| * Validates the given {@code path} and display the appropriate dialog asking the user to grant |
| * access to it. |
| */ |
| static boolean showFragment(Activity activity, int userId, String path) { |
| Log.d(TAG, "showFragment() for path " + path + " and user " + userId); |
| if (path == null) { |
| Log.e(TAG, "INTERNAL ERROR: showFragment() with null path"); |
| return false; |
| } |
| File file; |
| try { |
| file = new File(new File(path).getCanonicalPath()); |
| } catch (IOException e) { |
| Log.e(TAG, "Could not get canonical file from " + path); |
| return false; |
| } |
| final StorageManager sm = |
| (StorageManager) activity.getSystemService(Context.STORAGE_SERVICE); |
| |
| final String root = file.getParent(); |
| final String directory = file.getName(); |
| |
| // Verify directory is valid. |
| if (TextUtils.isEmpty(directory) || !isStandardDirectory(directory)) { |
| Log.d(TAG, "Directory '" + directory + "' is not standard (full path: '" + path + "')"); |
| return false; |
| } |
| |
| // Gets volume label and converted path |
| String volumeLabel = null; |
| final List<VolumeInfo> volumes = sm.getVolumes(); |
| if (DEBUG) Log.d(TAG, "Number of volumes: " + volumes.size()); |
| for (VolumeInfo volume : volumes) { |
| if (isRightVolume(volume, root, userId)) { |
| final File internalRoot = volume.getInternalPathForUser(userId); |
| // Must convert path before calling getDocIdForFileCreateNewDir() |
| if (DEBUG) Log.d(TAG, "Converting " + root + " to " + internalRoot); |
| file = new File(internalRoot, directory); |
| volumeLabel = sm.getBestVolumeDescription(volume); |
| break; |
| } |
| } |
| if (volumeLabel == null) { |
| Log.e(TAG, "Could not get volume for " + path); |
| return false; |
| } |
| |
| // Gets the package label. |
| final String appLabel = getAppLabel(activity); |
| if (appLabel == null) { |
| return false; |
| } |
| |
| // Sets args that will be retrieve on onCreate() |
| final Bundle args = new Bundle(); |
| args.putString(EXTRA_FILE, file.getAbsolutePath()); |
| args.putString(EXTRA_VOLUME_LABEL, volumeLabel); |
| args.putString(EXTRA_APP_LABEL, appLabel); |
| |
| final FragmentManager fm = activity.getFragmentManager(); |
| final FragmentTransaction ft = fm.beginTransaction(); |
| final OpenExternalDirectoryDialogFragment fragment = |
| new OpenExternalDirectoryDialogFragment(); |
| fragment.setArguments(args); |
| ft.add(fragment, FM_TAG); |
| ft.commitAllowingStateLoss(); |
| |
| return true; |
| } |
| |
| private static String getAppLabel(Activity activity) { |
| final String packageName = activity.getCallingPackage(); |
| final PackageManager pm = activity.getPackageManager(); |
| try { |
| return pm.getApplicationLabel(pm.getApplicationInfo(packageName, 0)).toString(); |
| } catch (NameNotFoundException e) { |
| Log.w(TAG, "Could not get label for package " + packageName); |
| return null; |
| } |
| } |
| |
| private static boolean isRightVolume(VolumeInfo volume, String root, int userId) { |
| final File userPath = volume.getPathForUser(userId); |
| final String path = userPath == null ? null : volume.getPathForUser(userId).getPath(); |
| final boolean isVisible = volume.isVisibleForWrite(userId); |
| if (DEBUG) { |
| Log.d(TAG, "Volume: " + volume + " userId: " + userId + " root: " + root |
| + " volumePath: " + volume.getPath().getPath() |
| + " pathForUser: " + path |
| + " internalPathForUser: " + volume.getInternalPath() |
| + " isVisible: " + isVisible); |
| } |
| return volume.isVisibleForWrite(userId) && root.equals(path); |
| } |
| |
| private static Intent createGrantedUriPermissionsIntent(ContentProviderClient provider, |
| File file) { |
| // Calls ExternalStorageProvider to get the doc id for the file |
| final Bundle bundle; |
| try { |
| bundle = provider.call("getDocIdForFileCreateNewDir", file.getPath(), null); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Did not get doc id from External Storage provider for " + file, e); |
| return null; |
| } |
| final String docId = bundle == null ? null : bundle.getString("DOC_ID"); |
| if (docId == null) { |
| Log.e(TAG, "Did not get doc id from External Storage provider for " + file); |
| return null; |
| } |
| Log.d(TAG, "doc id for " + file + ": " + docId); |
| |
| final Uri uri = DocumentsContract.buildTreeDocumentUri(EXTERNAL_STORAGE_AUTH, docId); |
| if (uri == null) { |
| Log.e(TAG, "Could not get URI for doc id " + docId); |
| return null; |
| } |
| |
| if (DEBUG) Log.d(TAG, "URI for " + file + ": " + uri); |
| final Intent intent = new Intent(); |
| intent.setData(uri); |
| intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION |
| | Intent.FLAG_GRANT_WRITE_URI_PERMISSION |
| | Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION |
| | Intent.FLAG_GRANT_PREFIX_URI_PERMISSION); |
| return intent; |
| } |
| |
| public static class OpenExternalDirectoryDialogFragment extends DialogFragment { |
| |
| private File mFile; |
| private String mVolumeLabel; |
| private String mAppLabel; |
| private ContentProviderClient mExternalStorageClient; |
| private ContentResolver mResolver; |
| |
| @Override |
| public void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| final Bundle args = getArguments(); |
| if (args != null) { |
| mFile = new File(args.getString(EXTRA_FILE)); |
| mVolumeLabel = args.getString(EXTRA_VOLUME_LABEL); |
| mAppLabel = args.getString(EXTRA_APP_LABEL); |
| mResolver = getContext().getContentResolver(); |
| } |
| } |
| |
| @Override |
| public void onDestroy() { |
| super.onDestroy(); |
| if (mExternalStorageClient != null) { |
| mExternalStorageClient.close(); |
| } |
| } |
| |
| @Override |
| public Dialog onCreateDialog(Bundle savedInstanceState) { |
| final String folder = mFile.getName(); |
| final Activity activity = getActivity(); |
| final OnClickListener listener = new OnClickListener() { |
| |
| @Override |
| public void onClick(DialogInterface dialog, int which) { |
| Intent intent = null; |
| if (which == DialogInterface.BUTTON_POSITIVE) { |
| intent = createGrantedUriPermissionsIntent(getExternalStorageClient(), |
| mFile); |
| } |
| if (which == DialogInterface.BUTTON_NEGATIVE || intent == null) { |
| activity.setResult(RESULT_CANCELED); |
| } else { |
| activity.setResult(RESULT_OK, intent); |
| } |
| activity.finish(); |
| } |
| }; |
| |
| final CharSequence message = TextUtils |
| .expandTemplate( |
| getText(R.string.open_external_dialog_request), mAppLabel, folder, |
| mVolumeLabel); |
| return new AlertDialog.Builder(activity, R.style.AlertDialogTheme) |
| .setMessage(message) |
| .setPositiveButton(R.string.allow, listener) |
| .setNegativeButton(R.string.deny, listener) |
| .create(); |
| } |
| |
| @Override |
| public void onCancel(DialogInterface dialog) { |
| super.onCancel(dialog); |
| final Activity activity = getActivity(); |
| activity.setResult(RESULT_CANCELED); |
| activity.finish(); |
| } |
| |
| private synchronized ContentProviderClient getExternalStorageClient() { |
| if (mExternalStorageClient == null) { |
| mExternalStorageClient = |
| mResolver.acquireContentProviderClient(EXTERNAL_STORAGE_AUTH); |
| } |
| return mExternalStorageClient; |
| } |
| } |
| } |