Move browsing functionality to the launch activity

The input for share URI has a drop-down list displaying discovered
shares.

app/src/main/java/com/google/android/sambadocumentsprovider/browsing/NetworkBrowser.java

@@ -22,35 +22,85 @@ import android.os.AsyncTask;
 import android.util.Log;
 
 import com.google.android.sambadocumentsprovider.TaskManager;
+import com.google.android.sambadocumentsprovider.base.DirectoryEntry;
 import com.google.android.sambadocumentsprovider.base.OnTaskFinishedCallback;
 import com.google.android.sambadocumentsprovider.browsing.broadcast.BroadcastBrowsingProvider;
 import com.google.android.sambadocumentsprovider.nativefacade.SmbClient;
+import com.google.android.sambadocumentsprovider.nativefacade.SmbDir;
 
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
+
+/**
+ * This class discovers Samba servers and shares under them available on the local network.
+ */
 public class NetworkBrowser {
-  public static final Uri SMB_BROWSING_URI = Uri.parse("smb://");
+  private static final Uri SMB_BROWSING_URI = Uri.parse("smb://");
 
   private static final String TAG = "NetworkBrowser";
 
   private final NetworkBrowsingProvider mMasterProvider;
   private final NetworkBrowsingProvider mBroadcastProvider;
   private final TaskManager mTaskManager;
+  private final SmbClient mClient;
 
   public NetworkBrowser(SmbClient client, TaskManager taskManager) {
     mMasterProvider = new MasterBrowsingProvider(client);
     mBroadcastProvider = new BroadcastBrowsingProvider();
     mTaskManager = taskManager;
+    mClient = client;
   }
 
-  public AsyncTask getServersAsync(OnTaskFinishedCallback<List<String>> callback) {
-    AsyncTask<Void, Void, List<String>> loadServersTask = new LoadServersTask(callback);
+  /**
+   * Asynchronously get available servers and shares under them.
+   * A server name is mapped to the list of its children.
+   */
+  public AsyncTask getSharesAsync(OnTaskFinishedCallback<Map<String, List<String>>> callback) {
+    AsyncTask<Void, Void, Map<String, List<String>>> loadServersTask = new LoadServersTask(callback);
 
     mTaskManager.runTask(SMB_BROWSING_URI, loadServersTask);
 
     return loadServersTask;
   }
 
+  private Map<String, List<String>> getShares() throws BrowsingException {
+    List<String> servers = getServers();
+
+    Map<String, List<String>> shares = new HashMap<>();
+
+    for (String server : servers) {
+      try {
+        shares.put(server, getSharesForServer(server));
+      } catch (IOException e) {
+        Log.e(TAG, "Failed to load shares for server", e);
+      }
+    }
+
+    return shares;
+  }
+
+  private List<String> getSharesForServer(String server) throws IOException {
+    List<String> shares = new ArrayList<>();
+
+    String serverUri = SMB_BROWSING_URI + server;
+    SmbDir serverDir = mClient.openDir(serverUri);
+
+    DirectoryEntry shareEntry;
+    while ((shareEntry = serverDir.readDir()) != null) {
+      if (shareEntry.getType() == DirectoryEntry.FILE_SHARE) {
+        shares.add(serverUri + "/" + shareEntry.getName().trim());
+      } else {
+        Log.i(TAG, "Unsupported entry type: " + shareEntry.getType());
+      }
+    }
+
+    return shares;
+  }
+
   private List<String> getServers() throws BrowsingException {
     List<String> servers = null;
 
@@ -67,23 +117,19 @@ public class NetworkBrowser {
     return servers;
   }
 
-  private class LoadServersTask extends AsyncTask<Void, Void, List<String>> {
-    final OnTaskFinishedCallback<List<String>> mCallback;
+  private class LoadServersTask extends AsyncTask<Void, Void, Map<String, List<String>>> {
+    final OnTaskFinishedCallback<Map<String, List<String>>>  mCallback;
 
     private BrowsingException mException;
 
-    LoadServersTask(OnTaskFinishedCallback<List<String>> callback) {
+    LoadServersTask(OnTaskFinishedCallback<Map<String, List<String>>>  callback) {
       mCallback = callback;
     }
 
-    List<String> loadData() throws BrowsingException {
-      return getServers();
-    }
-
     @Override
-    protected List<String> doInBackground(Void... voids) {
+    protected Map<String, List<String>>  doInBackground(Void... voids) {
       try {
-        return loadData();
+        return getShares();
       } catch (BrowsingException e) {
         Log.e(TAG, "Failed to load data for network browsing: ", e);
         mException = e;
@@ -91,7 +137,7 @@ public class NetworkBrowser {
       }
     }
 
-    protected void onPostExecute(List<String> servers) {
+    protected void onPostExecute(Map<String, List<String>>  servers) {
       if (servers != null) {
         mCallback.onTaskFinished(OnTaskFinishedCallback.SUCCEEDED, servers, null);
       } else {

app/src/main/java/com/google/android/sambadocumentsprovider/browsing/broadcast/BroadcastBrowsingProvider.java

@@ -30,7 +30,9 @@ import java.net.InetAddress;
 import java.net.SocketException;
 import java.net.SocketTimeoutException;
 import java.util.ArrayList;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
@@ -57,12 +59,12 @@ public class BroadcastBrowsingProvider implements NetworkBrowsingProvider {
         serverFutures.add(mExecutor.submit(new GetServersForInterfaceTask(address, mTransId)));
       }
 
-      List<String> servers = new ArrayList<>();
+      Set<String> servers = new HashSet<>();
       for (Future<List<String>> future : serverFutures) {
         servers.addAll(future.get());
       }
 
-      return servers;
+      return new ArrayList<>(servers);
     } catch (IOException | ExecutionException | InterruptedException e) {
       Log.e(TAG, "Failed to get servers via broadcast", e);
       throw new BrowsingException("Failed to get servers via broadcast", e);

app/src/main/java/com/google/android/sambadocumentsprovider/mount/BrowsingAutocompleteAdapter.java

@@ -0,0 +1,135 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.google.android.sambadocumentsprovider.mount;
+
+import android.widget.Filter;
+import android.widget.Filterable;
+
+import com.google.android.sambadocumentsprovider.R;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class BrowsingAutocompleteAdapter extends SectionedAdapter implements Filterable {
+  private final List<ServerInfo> mServers = new ArrayList<>();
+
+  private List<ServerInfo> mFilteredServers = new ArrayList<>();
+
+  public void addServer(String name, List<String> children) {
+    synchronized (mServers) {
+      mServers.add(new ServerInfo(name, children));
+    }
+
+    notifyDataSetChanged();
+  }
+
+  @Override
+  public Filter getFilter() {
+    return new Filter() {
+      @Override
+      protected FilterResults performFiltering(CharSequence charSequence) {
+        String query = charSequence == null ? "" : charSequence.toString().toLowerCase();
+
+        List<ServerInfo> filteredServers = new ArrayList<>();
+
+        if (!query.isEmpty()) {
+          filteredServers.add(new ServerInfo(query, Collections.<String>emptyList()));
+        }
+
+        if (!isLoadingData()) {
+          synchronized (mServers) {
+            for (ServerInfo serverInfo : mServers) {
+
+              List<String> displayedShares = new ArrayList<>();
+              for (String share : serverInfo.getChildren()) {
+                if (share.toLowerCase().contains(query)) {
+                  displayedShares.add(share);
+                }
+              }
+
+              if (!displayedShares.isEmpty()) {
+                filteredServers.add(new ServerInfo(serverInfo.getName(), displayedShares));
+              }
+            }
+          }
+        }
+
+        FilterResults results = new FilterResults();
+        results.values = filteredServers;
+
+        return results;
+      }
+
+      @Override
+      protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
+        mFilteredServers = (List<ServerInfo>) filterResults.values;
+
+        notifyDataSetChanged();
+      }
+    };
+  }
+
+  @Override
+  public int getSectionCount() {
+    return mFilteredServers.size();
+  }
+
+  @Override
+  public String getNameForSection(int sectionIndex) {
+    return mFilteredServers.get(sectionIndex).getName();
+  }
+
+  @Override
+  public int getIconForSection(int sectionIndex) {
+    return R.drawable.ic_server;
+  }
+
+  @Override
+  public int getSizeForSection(int sectionIndex) {
+    return mFilteredServers.get(sectionIndex).getChildren().size();
+  }
+
+  @Override
+  public String getNameForRow(int sectionIndex, int rowIndex) {
+    return mFilteredServers.get(sectionIndex).getChildren().get(rowIndex);
+  }
+
+  @Override
+  public int getIconForRow(int sectionIndex, int rowIndex) {
+    return R.drawable.ic_folder_shared;
+  }
+
+  private static class ServerInfo {
+    private final String mName;
+    private final List<String> mChildren;
+
+    ServerInfo(String name, List<String> children) {
+      this.mName = name;
+      this.mChildren = children;
+    }
+
+    String getName() {
+      return mName;
+    }
+
+    List<String> getChildren() {
+      return mChildren;
+    }
+  }
+}

app/src/main/java/com/google/android/sambadocumentsprovider/mount/BrowsingAutocompleteTextView.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.google.android.sambadocumentsprovider.mount;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+public class BrowsingAutocompleteTextView extends android.support.v7.widget.AppCompatAutoCompleteTextView {
+  public BrowsingAutocompleteTextView(Context context) {
+    super(context);
+  }
+
+  public BrowsingAutocompleteTextView(Context context, AttributeSet attributeSet) {
+    super(context, attributeSet);
+  }
+
+  public BrowsingAutocompleteTextView(Context context, AttributeSet attributeSet, int v) {
+    super(context, attributeSet, v);
+  }
+
+  @Override
+  public boolean enoughToFilter() {
+    return true;
+  }
+
+  public void filter() {
+    int length = getText().length();
+    performFiltering(getText(), length == 0 ? 0 : getText().charAt(length - 1));
+  }
+}

app/src/main/java/com/google/android/sambadocumentsprovider/mount/MountServerActivity.java

@@ -38,6 +38,7 @@ import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
+import android.view.MotionEvent;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnKeyListener;
@@ -52,19 +53,20 @@ import com.google.android.sambadocumentsprovider.ShareManager;
 import com.google.android.sambadocumentsprovider.TaskManager;
 import com.google.android.sambadocumentsprovider.base.AuthFailedException;
 import com.google.android.sambadocumentsprovider.base.OnTaskFinishedCallback;
+import com.google.android.sambadocumentsprovider.browsing.NetworkBrowser;
 import com.google.android.sambadocumentsprovider.cache.DocumentCache;
 import com.google.android.sambadocumentsprovider.document.DocumentMetadata;
 import com.google.android.sambadocumentsprovider.nativefacade.SmbClient;
 import com.google.android.sambadocumentsprovider.provider.SambaDocumentsProvider;
 
 import java.util.List;
+import java.util.Map;
 
 public class MountServerActivity extends AppCompatActivity {
 
   private static final String TAG = "MountServerActivity";
 
   private static final String ACTION_BROWSE = "android.provider.action.BROWSE";
-
   private static final String SHARE_PATH_KEY = "sharePath";
   private static final String NEEDS_PASSWORD_KEY = "needsPassword";
   private static final String DOMAIN_KEY = "domain";
@@ -100,15 +102,34 @@ public class MountServerActivity extends AppCompatActivity {
     }
   };
 
+  private final OnTaskFinishedCallback<Map<String, List<String>>>  mBrowsingCallback
+          = new OnTaskFinishedCallback<Map<String, List<String>>>() {
+    @Override
+    public void onTaskFinished(
+            @Status int status, @Nullable Map<String, List<String>>  result, @Nullable Exception exception) {
+
+      for (String server : result.keySet()) {
+        mBrowsingAdapter.addServer(server, result.get(server));
+      }
+
+      mBrowsingAdapter.finishLoading();
+
+      if (mSharePathEditText.isPopupShowing()) {
+        mSharePathEditText.filter();
+      }
+    }
+  };
+
   private DocumentCache mCache;
   private TaskManager mTaskManager;
   private ShareManager mShareManager;
   private SmbClient mClient;
+  private BrowsingAutocompleteAdapter mBrowsingAdapter;
 
   private CheckBox mNeedPasswordCheckbox;
   private View mPasswordHideGroup;
 
-  private EditText mSharePathEditText;
+  private BrowsingAutocompleteTextView mSharePathEditText;
   private EditText mDomainEditText;
   private EditText mUsernameEditText;
   private EditText mPasswordEditText;
@@ -130,7 +151,7 @@ public class MountServerActivity extends AppCompatActivity {
 
     mPasswordHideGroup = findViewById(R.id.password_hide_group);
 
-    mSharePathEditText = (EditText) findViewById(R.id.share_path);
+    mSharePathEditText = (BrowsingAutocompleteTextView) findViewById(R.id.share_path);
     mSharePathEditText.setOnKeyListener(mMountKeyListener);
 
     mUsernameEditText = (EditText) findViewById(R.id.username);
@@ -158,6 +179,8 @@ public class MountServerActivity extends AppCompatActivity {
     mConnectivityManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
 
     restoreSavedInstanceState(savedInstanceState);
+
+    startBrowsing();
   }
 
   private void restoreSavedInstanceState(@Nullable Bundle savedInstanceState) {
@@ -220,6 +243,23 @@ public class MountServerActivity extends AppCompatActivity {
     }
   }
 
+  private void startBrowsing() {
+    mSharePathEditText.setOnTouchListener(new View.OnTouchListener() {
+      @Override
+      public boolean onTouch(View view, MotionEvent motionEvent) {
+        mSharePathEditText.filter();
+        return false;
+      }
+    });
+
+    mBrowsingAdapter = new BrowsingAutocompleteAdapter();
+    mSharePathEditText.setAdapter(mBrowsingAdapter);
+    mSharePathEditText.setThreshold(0);
+
+    NetworkBrowser browser = new NetworkBrowser(mClient, mTaskManager);
+    browser.getSharesAsync(mBrowsingCallback);
+  }
+
   private void tryMount() {
     final NetworkInfo info = mConnectivityManager.getActiveNetworkInfo();
     if (info == null || !info.isConnected()) {

app/src/main/java/com/google/android/sambadocumentsprovider/mount/SectionedAdapter.java

@@ -0,0 +1,246 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.google.android.sambadocumentsprovider.mount;
+
+import android.graphics.Typeface;
+import android.support.annotation.IntDef;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import com.google.android.sambadocumentsprovider.R;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.ArrayList;
+import java.util.List;
+
+public abstract class SectionedAdapter extends BaseAdapter {
+  private static final String TAG = "SectionedAdapter";
+
+  @IntDef({SECTION_HEADER, REGULAR_ROW, LOADING_ROW})
+  @Retention(RetentionPolicy.SOURCE)
+  private @interface Type {}
+  private static final int SECTION_HEADER = 0;
+  private static final int REGULAR_ROW = 1;
+  private static final int LOADING_ROW = 2;
+
+  private List<FlatRow> mFlatRows = new ArrayList<>();
+
+  private volatile boolean mIsLoadingData = true;
+
+  public void finishLoading() {
+    mIsLoadingData = false;
+  }
+
+  public abstract int getSectionCount();
+
+  public abstract String getNameForSection(int sectionIndex);
+  public abstract int getIconForSection(int sectionIndex);
+  public abstract int getSizeForSection(int sectionIndex);
+
+  public abstract String getNameForRow(int sectionIndex, int rowIndex);
+  public abstract int getIconForRow(int sectionIndex, int rowIndex);
+
+  @Override
+  public int getCount() {
+    return mFlatRows.size() + (mIsLoadingData ? 1 : 0);
+  }
+
+  @Override
+  public FlatRow getItem(int position) {
+    if (position == mFlatRows.size() && mIsLoadingData) {
+      return null;
+    }
+
+    return mFlatRows.get(position);
+  }
+
+  @Override
+  public long getItemId(int position) {
+    return position;
+  }
+
+  public @Type int getItemViewType(int position) {
+    if (position == mFlatRows.size()) {
+      return LOADING_ROW;
+    }
+
+    return mFlatRows.get(position).isSectionHeader() ? SECTION_HEADER : REGULAR_ROW;
+  }
+
+  @Override
+  public View getView(int position, View reuseView, ViewGroup parent) {
+    int viewType = getItemViewType(position);
+
+    if (reuseView == null) {
+      LayoutInflater inflater = LayoutInflater.from(parent.getContext());
+
+      switch (viewType) {
+        case LOADING_ROW:
+          reuseView = inflater.inflate(R.layout.browsing_progress_item_layout, null);
+          break;
+        case SECTION_HEADER:
+        case REGULAR_ROW:
+          reuseView = inflater.inflate(R.layout.browsing_list_item_layout, null);
+          break;
+        default:
+          // Should never happen.
+          throw new RuntimeException("Unknown view type: " + viewType);
+      }
+
+      reuseView.setTag(new ViewHolder(reuseView));
+    }
+
+    ViewHolder holder = (ViewHolder) reuseView.getTag();
+
+    if (viewType == LOADING_ROW) {
+      return reuseView;
+    }
+
+    holder.bindView(mFlatRows.get(position));
+
+    return reuseView;
+  }
+
+  @Override
+  public boolean isEnabled(int position) {
+    if (position == mFlatRows.size() && mIsLoadingData) {
+      return false;
+    }
+
+    return !mFlatRows.get(position).isSectionHeader();
+  }
+
+  @Override
+  public void notifyDataSetChanged() {
+    flattenData();
+
+    super.notifyDataSetChanged();
+  }
+
+  private void flattenData() {
+    mFlatRows.clear();
+
+    int rowsCount = 0;
+
+    for (int i = 0; i < getSectionCount(); i++) {
+      rowsCount = addFlatRow(getNameForSection(i), getIconForSection(i), true, rowsCount);
+
+      for (int j = 0; j < getSizeForSection(i); j++) {
+        rowsCount = addFlatRow(getNameForRow(i, j), getIconForRow(i, j), false, rowsCount);
+      }
+    }
+  }
+
+  private int addFlatRow(String name, int iconId, boolean isSectionHeader, int position) {
+    FlatRow newRow = FlatRow.create(
+            name,
+            iconId,
+            isSectionHeader,
+            position < mFlatRows.size() ? mFlatRows.get(position) : null);
+
+
+    if (position < mFlatRows.size()) {
+      mFlatRows.set(position, newRow);
+    } else {
+      mFlatRows.add(newRow);
+    }
+
+    return position + 1;
+  }
+
+  protected boolean isLoadingData() {
+    return mIsLoadingData;
+  }
+
+  private static class ViewHolder {
+    private ImageView mIconImageView;
+    private TextView mNameTextView;
+
+    ViewHolder(View parent) {
+      mIconImageView = parent.findViewById(R.id.browsing_icon);
+      mNameTextView = parent.findViewById(R.id.browsing_name);
+    }
+
+    void bindView(FlatRow row) {
+      if (mIconImageView == null || mNameTextView == null) {
+        return;
+      }
+
+      if (row.isSectionHeader()) {
+        mIconImageView.setPadding(8, 0, 0, 0);
+      }
+
+      mIconImageView.setImageResource(row.getIconId());
+      mNameTextView.setText(row.getName());
+
+      if (row.isSectionHeader()) {
+        mIconImageView.setPadding(0, 0, 0, 0);
+        mNameTextView.setTypeface(null, Typeface.BOLD);
+      } else {
+        mIconImageView.setPadding(16, 0, 0, 0);
+        mNameTextView.setTypeface(null, Typeface.NORMAL);
+      }
+    }
+  }
+
+  private static class FlatRow {
+    private String mName;
+    private int mIconId;
+    private boolean mIsSectionHeader;
+
+    private FlatRow(String name, int iconId, boolean isSectionHeader) {
+      mName = name;
+      mIconId = iconId;
+      mIsSectionHeader = isSectionHeader;
+    }
+
+    static FlatRow create(String name, int iconId, boolean isSectionHeader, FlatRow reuse) {
+      if (reuse == null) {
+        return new FlatRow(name, iconId, isSectionHeader);
+      }
+
+      reuse.mName = name;
+      reuse.mIconId = iconId;
+      reuse.mIsSectionHeader = isSectionHeader;
+
+      return reuse;
+    }
+
+    String getName() {
+      return mName;
+    }
+
+    int getIconId() {
+      return mIconId;
+    }
+
+    boolean isSectionHeader() {
+      return mIsSectionHeader;
+    }
+
+    @Override
+    public String toString() {
+      return mName;
+    }
+  }
+}

app/src/main/java/com/google/android/sambadocumentsprovider/provider/SambaDocumentsProvider.java

@@ -28,7 +28,6 @@ import android.content.Context;
 import android.database.Cursor;
 import android.database.MatrixCursor;
 import android.net.Uri;
-import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.CancellationSignal;
@@ -59,7 +58,6 @@ import com.google.android.sambadocumentsprovider.document.LoadChildrenTask;
 import com.google.android.sambadocumentsprovider.base.OnTaskFinishedCallback;
 import com.google.android.sambadocumentsprovider.document.LoadDocumentTask;
 import com.google.android.sambadocumentsprovider.document.LoadStatTask;
-import com.google.android.sambadocumentsprovider.mount.MountServerActivity;
 import com.google.android.sambadocumentsprovider.nativefacade.SmbFacade;
 
 import java.io.FileNotFoundException;
@@ -131,22 +129,6 @@ public class SambaDocumentsProvider extends DocumentsProvider {
         }
       };
 
-  private final OnTaskFinishedCallback<List<String>> mLoadSharesFinishedCallback =
-    new OnTaskFinishedCallback<List<String>>() {
-      @Override
-      public void onTaskFinished(
-      @OnTaskFinishedCallback.Status int status,
-      @Nullable List<String> item,
-      @Nullable Exception exception) {
-        if (BuildConfig.DEBUG) Log.d(TAG, "Browsing callback");
-
-        mBrowsingStorage = item;
-
-        getContext().getContentResolver().notifyChange(
-                toNotifyUri(toUri(NetworkBrowser.SMB_BROWSING_URI.toString())), null, false);
-      }
-    };
-
   private final MountedShareChangeListener mShareChangeListener = new MountedShareChangeListener() {
     @Override
     public void onMountedServerChange() {
@@ -162,7 +144,6 @@ public class SambaDocumentsProvider extends DocumentsProvider {
   private DocumentCache mCache;
   private TaskManager mTaskManager;
   private StorageManager mStorageManager;
-  private NetworkBrowser mNetworkBrowser;
 
   private List<String> mBrowsingStorage;
 
@@ -178,7 +159,6 @@ public class SambaDocumentsProvider extends DocumentsProvider {
     mShareManager = SambaProviderApplication.getServerManager(context);
     mShareManager.addListener(mShareChangeListener);
     mStorageManager = (StorageManager) context.getSystemService(Context.STORAGE_SERVICE);
-    mNetworkBrowser = SambaProviderApplication.getNetworkBrowser(context);
 
     return mClient != null;
   }
@@ -190,14 +170,6 @@ public class SambaDocumentsProvider extends DocumentsProvider {
 
     MatrixCursor cursor = new MatrixCursor(projection);
 
-    cursor.addRow(new Object[] {
-      NetworkBrowser.SMB_BROWSING_URI.toString(),
-      NetworkBrowser.SMB_BROWSING_URI.toString(),
-      getContext().getResources().getString(R.string.browsing_root_name),
-      0,
-      R.drawable.ic_cloud,
-    });
-
     for (String uri : mShareManager) {
       if (!mShareManager.isShareMounted(uri)) {
         continue;
@@ -253,12 +225,6 @@ public class SambaDocumentsProvider extends DocumentsProvider {
     final MatrixCursor cursor = new MatrixCursor(projection);
     final Uri uri = toUri(documentId);
 
-    if (documentId.equals(NetworkBrowser.SMB_BROWSING_URI.toString())) {
-      cursor.addRow(getCursorRowForBrowsingRoot(projection));
-
-      return cursor;
-    }
-
     try {
       try (CacheResult result = mCache.get(uri)) {
 
@@ -292,10 +258,6 @@ public class SambaDocumentsProvider extends DocumentsProvider {
     if (BuildConfig.DEBUG) Log.d(TAG, "Querying children documents under " + documentId);
     projection = (projection == null) ? DEFAULT_DOCUMENT_PROJECTION : projection;
 
-    if (documentId.equals(NetworkBrowser.SMB_BROWSING_URI.toString())) {
-      return getFilesSharesCursor(projection);
-    }
-
     final Uri uri = toUri(documentId);
 
     try {
@@ -439,68 +401,6 @@ public class SambaDocumentsProvider extends DocumentsProvider {
     return row;
   }
 
-  private Object[] getCursorRowForServer(
-          String[] projection,
-          String server) {
-    Object[] row = new Object[projection.length];
-
-    for (int i = 0; i < projection.length; ++i) {
-      switch (projection[i]) {
-        case Document.COLUMN_DOCUMENT_ID:
-          row[i] = NetworkBrowser.SMB_BROWSING_URI.toString() + server;
-          break;
-        case Document.COLUMN_DISPLAY_NAME:
-          row[i] = server.isEmpty()
-                  ? getContext().getResources().getString(R.string.browsing_root_name) : server;
-          break;
-        case Document.COLUMN_FLAGS:
-          row[i] = 0;
-          break;
-        case Document.COLUMN_MIME_TYPE:
-          row[i] = Document.MIME_TYPE_DIR;
-          break;
-        case Document.COLUMN_SIZE:
-        case Document.COLUMN_LAST_MODIFIED:
-          row[i] = null;
-          break;
-        case Document.COLUMN_ICON:
-          row[i] = R.drawable.ic_server;
-          break;
-      }
-    }
-
-    return row;
-  }
-
-  private Object[] getCursorRowForBrowsingRoot(String[] projection) {
-    return getCursorRowForServer(projection, "");
-  }
-
-  private Cursor getFilesSharesCursor(String[] projection) {
-    final DocumentCursor cursor = new DocumentCursor(projection);
-
-    final Uri uri = toUri(NetworkBrowser.SMB_BROWSING_URI.toString());
-
-    if (mBrowsingStorage == null) {
-      AsyncTask serversTask = mNetworkBrowser.getServersAsync(mLoadSharesFinishedCallback);
-
-      Bundle extra = new Bundle();
-      extra.putBoolean(DocumentsContract.EXTRA_LOADING, true);
-
-      cursor.setNotificationUri(getContext().getContentResolver(), toNotifyUri(uri));
-      cursor.setExtras(extra);
-      cursor.setLoadingTask(serversTask);
-    } else {
-      for (String server : mBrowsingStorage) {
-        cursor.addRow(getCursorRowForServer(projection, server));
-      }
-
-      mBrowsingStorage = null;
-    }
-
-    return cursor;
-  }
-
   @Override
   public String createDocument(String parentDocumentId, String mimeType, String displayName)
       throws FileNotFoundException {

app/src/main/res/drawable/ic_keyboard.xml

@@ -21,8 +21,13 @@
         android:height="24dp"
         android:viewportWidth="24"
         android:viewportHeight="24">
-    <path
-        android:fillColor="#646464"
-        android:pathData="M19.35 10.04C18.67 6.59 15.64 4 12 4 9.11 4 6.6 5.64 5.35 8.04 2.34 8.36
-         0 10.91 0 14c0 3.31 2.69 6 6 6h13c2.76 0 5-2.24 5-5 0-2.64-2.05-4.78-4.65-4.96z"/>
-</vector>
+
+  <path
+    android:fillColor="#000000"
+    android:pathData="M20 5H4c-1.1 0-1.99 .9 -1.99 2L2 17c0 1.1 .9 2 2 2h16c1.1 0 2-.9
+2-2V7c0-1.1-.9-2-2-2zm-9 3h2v2h-2V8zm0 3h2v2h-2v-2zM8 8h2v2H8V8zm0
+3h2v2H8v-2zm-1 2H5v-2h2v2zm0-3H5V8h2v2zm9
+7H8v-2h8v2zm0-4h-2v-2h2v2zm0-3h-2V8h2v2zm3 3h-2v-2h2v2zm0-3h-2V8h2v2z" />
+  <path
+    android:pathData="M0 0h24v24H0zm0 0h24v24H0z" />
+</vector>

app/src/main/res/layout/activity_main.xml

@@ -40,7 +40,7 @@
       android:layout_height="wrap_content"
       android:orientation="vertical">
 
-      <EditText
+      <com.google.android.sambadocumentsprovider.mount.BrowsingAutocompleteTextView
         android:id="@+id/share_path"
         android:layout_width="match_parent"
         android:layout_height="@dimen/clickable_height"
@@ -53,7 +53,6 @@
         android:id="@+id/needs_password"
         android:layout_width="match_parent"
         android:layout_height="@dimen/clickable_height"
-        android:layout_below="@id/share_path"
         android:checked="false"
         android:text="@string/needs_password"/>
 

app/src/main/res/layout/browsing_list_item_layout.xml

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2017 Google Inc.
+  ~
+  ~ This program is free software: you can redistribute it and/or modify
+  ~ it under the terms of the GNU General Public License as published by
+  ~ the Free Software Foundation, either version 3 of the License, or
+  ~ (at your option) any later version.
+  ~
+  ~ This program is distributed in the hope that it will be useful,
+  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~ GNU General Public License for more details.
+  ~
+  ~ You should have received a copy of the GNU General Public License
+  ~ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<LinearLayout
+  xmlns:android="http://schemas.android.com/apk/res/android"
+  android:orientation="horizontal"
+  android:layout_width="match_parent"
+  android:layout_height="wrap_content"
+  android:padding="8dp">
+
+  <ImageView
+    android:id="@+id/browsing_icon"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_gravity="center"
+    android:src="@drawable/ic_server"
+    android:layout_marginStart="8dp"/>
+
+  <TextView
+    android:id="@+id/browsing_name"
+    android:layout_gravity="center"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_marginStart="8dp"
+    android:textStyle="bold"/>
+
+</LinearLayout>

app/src/main/res/layout/browsing_progress_item_layout.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2017 Google Inc.
+  ~
+  ~ This program is free software: you can redistribute it and/or modify
+  ~ it under the terms of the GNU General Public License as published by
+  ~ the Free Software Foundation, either version 3 of the License, or
+  ~ (at your option) any later version.
+  ~
+  ~ This program is distributed in the hope that it will be useful,
+  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~ GNU General Public License for more details.
+  ~
+  ~ You should have received a copy of the GNU General Public License
+  ~ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  -->
+
+<LinearLayout
+  xmlns:android="http://schemas.android.com/apk/res/android"
+  android:orientation="vertical"
+  android:layout_width="match_parent"
+  android:layout_height="match_parent">
+
+  <ProgressBar
+    android:layout_width="32dp"
+    android:layout_height="32dp"
+    android:layout_gravity="center"
+    android:layout_margin="8dp"/>
+
+  <TextView
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_gravity="center"
+    android:text="@string/browsing_waiting_prompt"/>
+</LinearLayout>

app/src/main/res/values/strings.xml

@@ -49,6 +49,7 @@
   <string name="no_web_browser">It needs a web browser to send feedback.</string>
 
   <string name="browsing_root_name">Samba Shares</string>
+  <string name="browsing_waiting_prompt">Looking for shares…</string>
 
   <string name="pin_this_share">Pin this share</string>
   <string name="login">Login</string>