wrapped file dialogs into class in preparation for proper file picking

src/org/thialfihar/android/apg/FileDialog.java

@@ -0,0 +1,42 @@
+package org.thialfihar.android.apg;
+
+import android.app.AlertDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.widget.EditText;
+
+public class FileDialog {
+
+    public static interface OnClickListener {
+        public void onCancelClick();
+        public void onOkClick(String filename);
+    }
+
+    public static AlertDialog build(Context context, String title, String message,
+                                    String defaultFile, OnClickListener onClickListener) {
+        AlertDialog.Builder alert = new AlertDialog.Builder(context);
+
+        alert.setTitle(title);
+        alert.setMessage(message);
+
+        final EditText input = new EditText(context);
+        input.setText(defaultFile);
+        alert.setView(input);
+
+        final OnClickListener clickListener = onClickListener;
+
+        alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                                    public void onClick(DialogInterface dialog, int id) {
+                                        clickListener.onOkClick(input.getText().toString());
+                                    }
+                                });
+
+        alert.setNegativeButton(android.R.string.cancel,
+                                new DialogInterface.OnClickListener() {
+                                    public void onClick(DialogInterface dialog, int id) {
+                                        clickListener.onCancelClick();
+                                    }
+                                });
+        return alert.create();
+    }
+}