-

app/src/main/java/de/server47/messageexport/MainActivity.java

@@ -4,10 +4,12 @@ import android.app.Activity;
 import android.content.Intent;
 import android.database.Cursor;
 import android.net.Uri;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
+import android.widget.ProgressBar;
 import android.widget.RadioButton;
 import android.widget.Toast;
 
@@ -30,6 +32,7 @@ public class MainActivity extends Activity
 {
     Button bExport;
     RadioButton rbRcs, rbSms, rbMms;
+    ProgressBar pbStatus;
 
     final static int typeSMS = 0;
     final static int typeMMS = 1;
@@ -49,6 +52,7 @@ public class MainActivity extends Activity
         rbRcs = (RadioButton)findViewById(R.id.rbRcs);
         rbSms = (RadioButton)findViewById(R.id.rbSms);
         rbMms = (RadioButton)findViewById(R.id.rbMms);
+        pbStatus = (ProgressBar)findViewById(R.id.pbStatus);
 
         bExport.setOnClickListener(new View.OnClickListener()
         {
@@ -72,6 +76,11 @@ public class MainActivity extends Activity
             {
                 case requestCodeExport:
                     if (resultCode == RESULT_OK)
+                    {
+                        AsyncTask<Void, Integer, Void> asyncTaskExport = new AsyncTask<Void, Integer, Void>()
+                        {
+                            @Override
+                            protected Void doInBackground(Void... voids)
                             {
                                 Uri uriTree = data.getData();
                                 String dataToWrite = getExportString();
@@ -79,13 +88,26 @@ public class MainActivity extends Activity
                                     exportFiles(uriTree, dataToWrite);
                                 else
                                     Toast.makeText(MainActivity.this, "Error reading messages. Can\'t export.", Toast.LENGTH_SHORT).show();
+
+                                return null;
+                            }
+
+                            @Override
+                            protected void onProgressUpdate(Integer... values)
+                            {
+                                super.onProgressUpdate(values);
+                                pbStatus.setProgress(values[0]);
+                            }
+                        };
+
+                        asyncTaskExport.execute();
                     }
                     break;
             }
         }
     }
 
-    String getExportString()
+    String getExportString(AsyncTask<Void,Integer,Void> asyncTaskReference)
     {
         List<Map<String,String>> response;
 
@@ -100,6 +122,8 @@ public class MainActivity extends Activity
         {
             messageCount = response.size();
 
+            asyncTaskReference.publishProgress((int)Math.round(messageCount/response.size()));
+
             StringBuilder export = new StringBuilder();
 
             export.append("<?xml-stylesheet type=\"text/xsl\" href=\"sms.xsl\"?>");
@@ -122,9 +146,14 @@ public class MainActivity extends Activity
                             type: 2 = outbound
                         */
 
+                export.append("<sms protocol=\"0\"");
+
+                if(!StringUtils.isEmpty(response.get(i).get("remote_uri")))
+                    export.append(" address=\"" + response.get(i).get("remote_uri").replace("tel:", "") + "\"");
+                else
+                    export.append(" address=\"" + response.get(i).get("address") + "\"");
+
                 export.append(
-                        "<sms protocol=\"0\"" +
-                            " address=\"" + response.get(i).get("remote_uri").replace("tel:", "") + "\"" +
                             " date=\"" + response.get(i).get("date") + "\"" +
                             " type=\"" + response.get(i).get("type") + "\"" +
                             " subject=\"null\"" +
@@ -238,7 +267,10 @@ public class MainActivity extends Activity
                 }
                 Log.i("Message",  "Message nr. " + messageCounter  + " " + message);
 
+                if(!StringUtils.isEmpty(messageMap.get("body")))
                     returnList.add(messageMap);
+                else
+                    Log.i("Message", "Skipping a message with an empty body.");
             }
             while (cursor.moveToNext());
         }

app/src/main/res/layout/main_activity.xml

@@ -38,6 +38,15 @@
 
     </RadioGroup>
 
+    <ProgressBar
+        android:id="@+id/pbStatus"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        style="@style/Widget.AppCompat.ProgressBar.Horizontal"
+        android:minHeight="50dp"
+        android:max="100" />
+
+
     <Button
         android:id="@+id/bExport"
         android:layout_width="wrap_content"