add OpenDialogActivity (stub)

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/OpenDialogActivity.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * 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 org.sufficientlysecure.keychain.ui;
+
+import android.app.Dialog;
+import android.app.DialogFragment;
+import android.app.ProgressDialog;
+import android.content.DialogInterface;
+import android.os.Bundle;
+import android.os.Message;
+import android.os.Messenger;
+import android.os.RemoteException;
+import android.support.v4.app.FragmentActivity;
+import android.util.Log;
+import android.view.ContextThemeWrapper;
+
+import org.sufficientlysecure.keychain.Constants;
+
+/**
+ * We can not directly create a dialog on the context provided inside the content provider.
+ * This activity encapsulates a DialogFragment to emulate a dialog.
+ */
+public class OpenDialogActivity extends FragmentActivity {
+
+    public static final String EXTRA_MESSENGER = "messenger";
+    public static final String EXTRA_FILENAME = "filename";
+
+    public static final int MSG_CANCEL = 1;
+    public static final int MSG_DECRYPT_OPEN = 2;
+    public static final int MSG_GET_ENCRYPTED = 3;
+
+    MyDialogFragment mDialogFragment;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // this activity itself has no content view (see manifest)
+
+        mDialogFragment = new MyDialogFragment();
+        // give all extras through to the fragment
+        mDialogFragment.setArguments(getIntent().getExtras());
+
+        mDialogFragment.show(getFragmentManager(), "dialog");
+    }
+
+    public static class MyDialogFragment extends DialogFragment {
+
+        private Messenger mMessenger;
+
+        /**
+         * Creates dialog
+         */
+        @Override
+        public Dialog onCreateDialog(Bundle savedInstanceState) {
+            mMessenger = getArguments().getParcelable(EXTRA_MESSENGER);
+            String filename = getArguments().getString(EXTRA_FILENAME);
+
+            // hack to get holo design (which is not automatically applied due to activity's Theme.NoDisplay
+            ContextThemeWrapper context = new ContextThemeWrapper(getActivity(),
+                    android.R.style.Theme_DeviceDefault_Light_Dialog);
+            ProgressDialog.Builder progress = new ProgressDialog.Builder(context);
+            return progress.show();
+        }
+
+        @Override
+        public void onCancel(DialogInterface dialog) {
+            super.onCancel(dialog);
+
+            dismiss();
+            sendMessageToHandler(MSG_CANCEL);
+        }
+
+        @Override
+        public void onDismiss(DialogInterface dialog) {
+            super.onDismiss(dialog);
+            Log.d(Constants.TAG, "onDismiss");
+
+            getActivity().finish();
+        }
+
+        /**
+         * Send message back to handler which is initialized in a activity
+         *
+         * @param what Message integer you want to send
+         */
+        private void sendMessageToHandler(Integer what) {
+            Message msg = Message.obtain();
+            msg.what = what;
+
+            try {
+                mMessenger.send(msg);
+            } catch (RemoteException e) {
+                Log.w(Constants.TAG, "Exception sending message, Is handler present?", e);
+            } catch (NullPointerException e) {
+                Log.w(Constants.TAG, "Messenger is null!", e);
+            }
+        }
+
+    }
+
+}