Two more DialogFrament-related crash fixes as found in #466.

app/src/main/java/org/transdroid/core/gui/search/BarcodeHelper.java

@@ -19,7 +19,7 @@ package org.transdroid.core.gui.search;
 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.app.AlertDialog;
-import android.app.DialogFragment;
+import android.content.Context;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
@@ -27,6 +27,8 @@ import android.net.Uri;
 
 import org.transdroid.R;
 
+import java.lang.ref.WeakReference;
+
 public class BarcodeHelper {
 
 	// A 'random' ID to identify QR-encoded settings scan intents
@@ -69,18 +71,16 @@ public class BarcodeHelper {
 			activity.startActivityForResult(intent, requestCode);
 		} catch (Exception e) {
 			// Can't start the bar code scanner, for example with a SecurityException or when ZXing is not present
-			new DialogFragment() {
+			final WeakReference<Context> intentStartContext = new WeakReference<Context>(activity);
-				public android.app.Dialog onCreateDialog(android.os.Bundle savedInstanceState) {
+			new AlertDialog.Builder(activity).setIcon(android.R.drawable.ic_dialog_alert)
-					return new AlertDialog.Builder(activity).setIcon(android.R.drawable.ic_dialog_alert)
 					.setMessage(activity.getString(R.string.search_barcodescannernotfound))
 					.setPositiveButton(android.R.string.yes, new OnClickListener() {
 						@Override
 						public void onClick(DialogInterface dialog, int which) {
-									activity.startActivity(new Intent(Intent.ACTION_VIEW, SCANNER_MARKET_URI));
+							if (intentStartContext.get() != null)
-								}
+								intentStartContext.get().startActivity(new Intent(Intent.ACTION_VIEW, SCANNER_MARKET_URI));
-							}).setNegativeButton(android.R.string.no, null).create();
 						}
-			}.show(activity.getFragmentManager(), "installscanner");
+					}).setNegativeButton(android.R.string.no, null).show();
 		}
 	}
 

app/src/main/java/org/transdroid/core/gui/search/FilePickerHelper.java

@@ -21,12 +21,14 @@ import org.transdroid.R;
 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.app.AlertDialog;
-import android.app.DialogFragment;
+import android.content.Context;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnClickListener;
 import android.content.Intent;
 import android.net.Uri;
 
+import java.lang.ref.WeakReference;
+
 public class FilePickerHelper {
 
 	public static final int ACTIVITY_FILEPICKER = 0x0000c0df; // A 'random' ID to identify file picker intents
@@ -49,22 +51,17 @@ public class FilePickerHelper {
 				// Start a file manager that can handle the PICK_FILE intent (specifically IO File Manager)
 				activity.startActivityForResult(new Intent("org.openintents.action.PICK_FILE"), ACTIVITY_FILEPICKER);
 			} catch (Exception e2) {
-				// Can't start the file manager, for example with a SecurityException or when IO File Manager is not
+				// Can't start the file manager, for example with a SecurityException or when IO File Manager is not present
-				// present
+				final WeakReference<Context> intentStartContext = new WeakReference<Context>(activity);
-				new DialogFragment() {
+				new AlertDialog.Builder(activity).setIcon(android.R.drawable.ic_dialog_alert)
-					public android.app.Dialog onCreateDialog(android.os.Bundle savedInstanceState) {
-						return new AlertDialog.Builder(activity).setIcon(android.R.drawable.ic_dialog_alert)
 						.setMessage(activity.getString(R.string.search_filemanagernotfound))
 						.setPositiveButton(android.R.string.yes, new OnClickListener() {
 							@Override
 							public void onClick(DialogInterface dialog, int which) {
-										if (activity != null)
+								if (intentStartContext.get() != null)
-											activity.startActivity(new Intent(Intent.ACTION_VIEW,
+									intentStartContext.get().startActivity(new Intent(Intent.ACTION_VIEW, FILEMANAGER_MARKET_URI));
-													FILEMANAGER_MARKET_URI));
 							}
-								}).setNegativeButton(android.R.string.no, null).create();
+						}).setNegativeButton(android.R.string.no, null).show();
-					};
-				}.show(activity.getFragmentManager(), "installfilemanager");
 			}
 		}
 	}