Merge pull request #315 from jessicayuen/master

#226: Added cancel option to ProgressDialogFragments. Create Key is now cancelable.

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/KeychainIntentService.java

@@ -203,10 +203,18 @@ public class KeychainIntentService extends IntentService implements ProgressDial
 
     Messenger mMessenger;
 
+    private boolean mIsCanceled;
+
     public KeychainIntentService() {
         super("ApgService");
     }
 
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        this.mIsCanceled = true;
+    }
+
     /**
      * The IntentService calls this method from the default worker thread with the intent that
      * started the service. When this method returns, IntentService stops the service, as
@@ -815,6 +823,10 @@ public class KeychainIntentService extends IntentService implements ProgressDial
     }
 
     private void sendErrorToHandler(Exception e) {
+        // Service was canceled. Do not send error to handler.
+        if (this.mIsCanceled)
+            return;
+
         Log.e(Constants.TAG, "ApgService Exception: ", e);
         e.printStackTrace();
 
@@ -824,6 +836,10 @@ public class KeychainIntentService extends IntentService implements ProgressDial
     }
 
     private void sendMessageToHandler(Integer arg1, Integer arg2, Bundle data) {
+        // Service was canceled. Do not send message to handler.
+        if (this.mIsCanceled)
+            return;
+
         Message msg = Message.obtain();
         msg.arg1 = arg1;
         if (arg2 != null) {

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/service/KeychainIntentServiceHandler.java

@@ -21,6 +21,8 @@ import org.sufficientlysecure.keychain.ui.dialog.ProgressDialogFragment;
 import org.sufficientlysecure.keychain.R;
 
 import android.app.Activity;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnCancelListener;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
@@ -55,9 +57,15 @@ public class KeychainIntentServiceHandler extends Handler {
     }
 
     public KeychainIntentServiceHandler(Activity activity, int progressDialogMessageId, int progressDialogStyle) {
+        this(activity, progressDialogMessageId, progressDialogStyle, false, null);
+    }
+
+    public KeychainIntentServiceHandler(Activity activity, int progressDialogMessageId,
+                                        int progressDialogStyle, boolean cancelable,
+                                        OnCancelListener onCancelListener) {
         this.mActivity = activity;
         this.mProgressDialogFragment = ProgressDialogFragment.newInstance(progressDialogMessageId,
-                progressDialogStyle);
+                progressDialogStyle, cancelable, onCancelListener);
     }
 
     public void showProgressDialog(FragmentActivity activity) {

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/EditKeyActivity.java

@@ -44,8 +44,10 @@ import org.sufficientlysecure.keychain.ui.widget.UserIdEditor;
 import org.sufficientlysecure.keychain.util.IterableIterator;
 import org.sufficientlysecure.keychain.util.Log;
 
+import android.app.Activity;
 import android.app.ProgressDialog;
 import android.content.Context;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
@@ -173,7 +175,7 @@ public class EditKeyActivity extends ActionBarActivity {
                 if (generateDefaultKeys) {
 
                     // Send all information needed to service generate keys in other thread
-                    Intent serviceIntent = new Intent(this, KeychainIntentService.class);
+                    final Intent serviceIntent = new Intent(this, KeychainIntentService.class);
                     serviceIntent.setAction(KeychainIntentService.ACTION_GENERATE_DEFAULT_RSA_KEYS);
 
                     // fill values for this action
@@ -185,7 +187,19 @@ public class EditKeyActivity extends ActionBarActivity {
 
                     // Message is received after generating is done in ApgService
                     KeychainIntentServiceHandler saveHandler = new KeychainIntentServiceHandler(
-                            this, R.string.progress_generating, ProgressDialog.STYLE_SPINNER) {
+                            this, R.string.progress_generating, ProgressDialog.STYLE_SPINNER, true,
+
+                            new DialogInterface.OnCancelListener() {
+                                @Override
+                                public void onCancel(DialogInterface dialog) {
+                                    // Stop key generation on cancel
+                                    stopService(serviceIntent);
+                                    EditKeyActivity.this.setResult(Activity.RESULT_CANCELED);
+                                    EditKeyActivity.this.finish();
+                                }
+                            }) {
+
+                        @Override
                         public void handleMessage(Message message) {
                             // handle messages by standard ApgHandler first
                             super.handleMessage(message);

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/DeleteFileDialogFragment.java

@@ -83,7 +83,7 @@ public class DeleteFileDialogFragment extends DialogFragment {
                 intent.putExtra(KeychainIntentService.EXTRA_DATA, data);
 
                 ProgressDialogFragment deletingDialog = ProgressDialogFragment.newInstance(
-                        R.string.progress_deleting_securely, ProgressDialog.STYLE_HORIZONTAL);
+                        R.string.progress_deleting_securely, ProgressDialog.STYLE_HORIZONTAL, false, null);
 
                 // Message is received after deleting is done in ApgService
                 KeychainIntentServiceHandler saveHandler = new KeychainIntentServiceHandler(activity, deletingDialog) {

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/ProgressDialogFragment.java

@@ -21,28 +21,40 @@ import android.app.Activity;
 import android.app.Dialog;
 import android.app.ProgressDialog;
 import android.content.DialogInterface;
+import android.content.DialogInterface.OnCancelListener;
 import android.content.DialogInterface.OnKeyListener;
 import android.os.Bundle;
 import android.support.v4.app.DialogFragment;
 import android.view.KeyEvent;
 
+import org.sufficientlysecure.keychain.R;
+
 public class ProgressDialogFragment extends DialogFragment {
     private static final String ARG_MESSAGE_ID = "message_id";
     private static final String ARG_STYLE = "style";
+    private static final String ARG_CANCELABLE = "cancelable";
+
+    private OnCancelListener mOnCancelListener;
 
     /**
      * Creates new instance of this fragment
      *
-     * @param id
+     * @param messageId
+     * @param style
+     * @param cancelable
      * @return
      */
-    public static ProgressDialogFragment newInstance(int messageId, int style) {
+    public static ProgressDialogFragment newInstance(int messageId, int style, boolean cancelable,
+                                                     OnCancelListener onCancelListener) {
         ProgressDialogFragment frag = new ProgressDialogFragment();
         Bundle args = new Bundle();
         args.putInt(ARG_MESSAGE_ID, messageId);
         args.putInt(ARG_STYLE, style);
+        args.putBoolean(ARG_CANCELABLE, cancelable);
 
         frag.setArguments(args);
+        frag.mOnCancelListener = onCancelListener;
+
         return frag;
     }
 
@@ -60,7 +72,6 @@ public class ProgressDialogFragment extends DialogFragment {
     /**
      * Updates progress of dialog
      *
-     * @param messageId
      * @param progress
      * @param max
      */
@@ -74,7 +85,7 @@ public class ProgressDialogFragment extends DialogFragment {
     /**
      * Updates progress of dialog
      *
-     * @param messageId
+     * @param message
      * @param progress
      * @param max
      */
@@ -86,12 +97,20 @@ public class ProgressDialogFragment extends DialogFragment {
         dialog.setMax(max);
     }
 
+    @Override
+    public void onCancel(DialogInterface dialog) {
+        super.onCancel(dialog);
+
+        if (this.mOnCancelListener != null)
+            this.mOnCancelListener.onCancel(dialog);
+    }
+
     /**
      * Creates dialog
      */
     @Override
     public Dialog onCreateDialog(Bundle savedInstanceState) {
-        Activity activity = getActivity();
+        final Activity activity = getActivity();
 
         ProgressDialog dialog = new ProgressDialog(activity);
         dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
@@ -100,10 +119,22 @@ public class ProgressDialogFragment extends DialogFragment {
 
         int messageId = getArguments().getInt(ARG_MESSAGE_ID);
         int style = getArguments().getInt(ARG_STYLE);
+        boolean cancelable = getArguments().getBoolean(ARG_CANCELABLE);
 
         dialog.setMessage(getString(messageId));
         dialog.setProgressStyle(style);
 
+        if (cancelable) {
+            dialog.setButton(DialogInterface.BUTTON_NEGATIVE,
+                    activity.getString(R.string.progress_cancel),
+                    new DialogInterface.OnClickListener() {
+                @Override
+                public void onClick(DialogInterface dialog, int which) {
+                    dialog.cancel();
+                }
+            });
+        }
+
         // Disable the back button
         OnKeyListener keyListener = new OnKeyListener() {
 

OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/widget/SectionView.java

@@ -18,6 +18,7 @@ package org.sufficientlysecure.keychain.ui.widget;
 
 import android.app.ProgressDialog;
 import android.content.Context;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.os.Bundle;
 import android.os.Message;
@@ -211,7 +212,7 @@ public class SectionView extends LinearLayout implements OnClickListener, Editor
 
     private void createKey() {
         // Send all information needed to service to edit key in other thread
-        Intent intent = new Intent(mActivity, KeychainIntentService.class);
+        final Intent intent = new Intent(mActivity, KeychainIntentService.class);
 
         intent.setAction(KeychainIntentService.ACTION_GENERATE_KEY);
 
@@ -238,7 +239,12 @@ public class SectionView extends LinearLayout implements OnClickListener, Editor
 
         // show progress dialog
         mGeneratingDialog = ProgressDialogFragment.newInstance(R.string.progress_generating,
-                ProgressDialog.STYLE_SPINNER);
+                ProgressDialog.STYLE_SPINNER, true, new DialogInterface.OnCancelListener() {
+            @Override
+            public void onCancel(DialogInterface dialog) {
+                mActivity.stopService(intent);
+            }
+        });
 
         // Message is received after generating is done in ApgService
         KeychainIntentServiceHandler saveHandler = new KeychainIntentServiceHandler(mActivity,

OpenPGP-Keychain/src/main/res/values/strings.xml

@@ -296,6 +296,7 @@
 
     <!-- progress dialogs, usually ending in '…' -->
     <string name="progress_done">done.</string>
+    <string name="progress_cancel">cancel</string>
     <string name="progress_saving">saving…</string>
     <string name="progress_importing">importing…</string>
     <string name="progress_exporting">exporting…</string>