Add StorageProvider sample code to browseables.

Change-Id: I353f596e9fc7455781e4c8d7f1972dfcd5739ddb
2013-10-30 19:31:29 -07:00
parent 46686c6f15
commit c921db8d27
19 changed files with 929 additions and 0 deletions
--- a/samples/browseable/StorageProvider/src/com.example.android.storageprovider/MyCloudFragment.java
+++ b/samples/browseable/StorageProvider/src/com.example.android.storageprovider/MyCloudFragment.java
@@ -0,0 +1,105 @@
+/*
+* Copyright 2013 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.example.android.storageprovider;
+
+
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.provider.DocumentsContract;
+import android.support.v4.app.Fragment;
+import android.view.Menu;
+import android.view.MenuItem;
+
+import com.example.android.common.logger.Log;
+
+/**
+ * Toggles the user's login status via a login menu option, and enables/disables the cloud storage
+ * content provider.
+ */
+public class MyCloudFragment extends Fragment {
+
+    private static final String TAG = "MyCloudFragment";
+    private static final String AUTHORITY = "com.example.android.storageprovider.documents";
+    private boolean mLoggedIn = false;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        mLoggedIn = readLoginValue();
+
+        setHasOptionsMenu(true);
+    }
+
+    @Override
+    public void onPrepareOptionsMenu(Menu menu) {
+        super.onPrepareOptionsMenu(menu);
+        MenuItem item = menu.findItem(R.id.action_toggle_login);
+        item.setTitle(mLoggedIn ? R.string.log_out : R.string.log_in);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        if (item.getItemId() == R.id.action_toggle_login) {
+            toggleLogin();
+            item.setTitle(mLoggedIn ? R.string.log_out : R.string.log_in);
+
+            // BEGIN_INCLUDE(notify_change)
+            // Notify the system that the status of our roots has changed.  This will trigger
+            // a call to MyCloudProvider.queryRoots() and force a refresh of the system
+            // picker UI.  It's important to call this or stale results may persist.
+            getActivity().getContentResolver().notifyChange(DocumentsContract.buildRootsUri
+                    (AUTHORITY), null, false);
+            // END_INCLUDE(notify_change)
+        }
+        return true;
+    }
+
+    /**
+     * Dummy function to change the user's authorization status.
+     */
+    private void toggleLogin() {
+        // Replace this with your standard method of authentication to determine if your app
+        // should make the user's documents available.
+        mLoggedIn = !mLoggedIn;
+        writeLoginValue(mLoggedIn);
+        Log.i(TAG, getString(mLoggedIn ? R.string.logged_in_info : R.string.logged_out_info));
+    }
+
+    /**
+     * Dummy function to save whether the user is logged in.
+     */
+    private void writeLoginValue(boolean loggedIn) {
+        final SharedPreferences sharedPreferences =
+                getActivity().getSharedPreferences(getString(R.string.app_name),
+                        getActivity().MODE_PRIVATE);
+        sharedPreferences.edit().putBoolean(getString(R.string.key_logged_in), loggedIn).commit();
+    }
+
+    /**
+     * Dummy function to determine whether the user is logged in.
+     */
+    private boolean readLoginValue() {
+        final SharedPreferences sharedPreferences =
+                getActivity().getSharedPreferences(getString(R.string.app_name),
+                        getActivity().MODE_PRIVATE);
+        return sharedPreferences.getBoolean(getString(R.string.key_logged_in), false);
+    }
+
+}
+
+