Prompt user for APN details when missing.

If TextSecure is running on a device without APN details, we prompt
the user to manually specify them when the user goes to send an MMS
message.

AndroidManifest.xml

@@ -62,6 +62,11 @@
             
         </activity>
         
+    <activity android:name=".PromptApnActivity"
+              android:label="Configure MMS Settings"
+              android:windowSoftInputMode="stateUnchanged"              
+              android:configChanges="touchscreen|keyboard|keyboardHidden|orientation|screenLayout|screenSize"/>
+             
     <activity android:name=".ConversationListActivity"
               android:label="@string/app_name"
               android:launchMode="singleTask"

res/layout/prompt_apn_activity.xml

@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+            android:layout_width="fill_parent"
+            android:layout_height="fill_parent"
+            android:fillViewport="true"
+            android:background="@drawable/background_pattern_repeat">
+
+    <FrameLayout
+        android:layout_width="fill_parent"
+        android:layout_height="fill_parent"
+        android:gravity="center" >
+        
+        <LinearLayout android:paddingRight="16dip"
+                      android:paddingLeft="16dip"
+                      android:paddingTop="10dip"
+                      android:layout_width="fill_parent"
+                      android:layout_height="wrap_content"
+                      android:layout_gravity="center"
+                      android:orientation="vertical">
+    
+            <TextView style="@style/Registration.Description"
+                      android:layout_width="fill_parent"
+                      android:layout_height="wrap_content"
+                      android:layout_marginBottom="16dip"
+                      android:text="@string/prompt_apn_activity__textsecure_requires_apn_settings_to_deliver_media_messages_via_your_wireless_carrier"/>
+                    
+            <TextView style="@style/Registration.Description"
+                      android:layout_width="fill_parent"
+                      android:layout_height="wrap_content"
+                      android:layout_marginBottom="16dip"
+                      android:text="@string/prompt_apn_activity__to_send_media_messages_please_complete_the_necessary_apn_information_below"/>
+
+            <TextView style="@style/Registration.Label"
+                      android:layout_width="fill_parent"
+                      android:text="@string/prompt_apn_activity__mmsc_url_required"/>
+
+            <EditText android:id="@+id/mmsc_url"
+                      android:layout_width="fill_parent"
+                      android:layout_height="wrap_content"
+                      android:singleLine="true"
+                      android:layout_marginBottom="10dip" />
+
+            <TextView style="@style/Registration.Label"
+                      android:layout_width="fill_parent"
+                      android:text="@string/prompt_apn_activity__mms_proxy_host_optional"/>
+
+            <EditText android:id="@+id/mms_proxy_host"
+                      android:layout_width="fill_parent"
+                      android:layout_height="wrap_content"
+                      android:singleLine="true"
+                      android:layout_marginBottom="10dip" />
+            
+            <TextView style="@style/Registration.Label"
+                      android:layout_width="fill_parent"
+                      android:text="@string/prompt_apn_activity__mms_proxy_port_optional"/>
+
+            <EditText android:id="@+id/mms_proxy_port"
+                      android:layout_width="fill_parent"
+                      android:layout_height="wrap_content"
+                      android:layout_marginBottom="10dip"
+                      android:inputType="number"
+                      android:singleLine="true" />      
+                        
+            <LinearLayout android:orientation="horizontal"
+                          android:gravity="center"
+                          android:layout_width="fill_parent"
+                          android:layout_height="wrap_content"
+                          android:layout_marginTop="10dip"
+                          android:layout_marginBottom="20dip">
+
+                <Button style="@android:style/Widget.Button"
+                        android:id="@+id/cancel_button"
+                        android:text="@android:string/cancel"
+                        android:layout_weight="1"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_marginRight="7dip"
+                        android:textAppearance="?android:attr/textAppearanceMedium"/>
+                
+                <Button style="@android:style/Widget.Button"
+                        android:id="@+id/ok_button"
+                        android:text="@android:string/ok"
+                        android:layout_weight="1"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:textAppearance="?android:attr/textAppearanceMedium"/>                
+            </LinearLayout>
+        </LinearLayout>    
+    </FrameLayout>
+</ScrollView>

res/values/strings.xml

@@ -120,6 +120,11 @@
     <!-- PassphrasePromptActivity -->
     <string name="PassphrasePromptActivity_invalid_passphrase_exclamation">Invalid Passphrase!</string>
     
+    <!-- PromptApnActivity -->
+    <string name="PromptApnActivity_you_must_specify_an_mmsc_url_for_your_carrier">You must specify an MMSC URL for your carrier.</string>
+    <string name="PromptApnActivity_mms_settings_updated">MMS Settings Updated</string>
+    <string name="PromptApnActivity_you_can_modify_these_values_from_the_textsecure_settings_menu_at_any_time_">You can modify these values from the TextSecure settings menu at any time.</string>    
+    
     <!-- ReceiveKeyActivity -->
     <string name="ReceiveKeyActivity_error_you_have_received_a_corrupted_public_key">ERROR:\n\nYou have received a corrupted public key.  This key can not be processed, please re-initiate a secure session.</string>
     <string name="ReceiveKeyActivity_error_you_have_received_a_public_key_from_an_unsupported_version_of_the_protocol">ERROR:\n\nYou have received a public key from an unsupported version of the protocol.  This key can not be processed, please re-initiate a secure session.</string>
@@ -295,6 +300,13 @@
     <string name="prompt_passphrase_activity__textsecure_passphrase">TEXTSECURE PASSPHRASE</string>
     <string name="prompt_passphrase_activity__unlock">Unlock</string>
     
+    <!-- prompt_apn_activity -->
+    <string name="prompt_apn_activity__textsecure_requires_apn_settings_to_deliver_media_messages_via_your_wireless_carrier">TextSecure requires APN settings to deliver media messages via your wireless carrier.  Your device does not make this information available, which is occasionally true for locked devices and other restrictive configurations.</string>
+    <string name="prompt_apn_activity__to_send_media_messages_please_complete_the_necessary_apn_information_below">To send media messages, please complete the necessary APN information below. The values for your carrier can generally be located by searching for \'&amp;lt;your carrier&amp;gt; APN\'.  You will only need to do this once.</string>
+    <string name="prompt_apn_activity__mmsc_url_required">MMSC URL (REQUIRED):</string>
+    <string name="prompt_apn_activity__mms_proxy_host_optional">MMS PROXY HOST (OPTIONAL):</string>
+    <string name="prompt_apn_activity__mms_proxy_port_optional">MMS PROXY PORT (OPTIONAL):</string>    
+    
     <!-- receive_key_activity -->
     <string name="receive_key_activity__session">Session</string>
     <string name="receive_key_activity__identities">Identities</string>

src/org/thoughtcrime/securesms/ConversationActivity.java

@@ -58,6 +58,7 @@ import org.thoughtcrime.securesms.database.DraftDatabase.Draft;
 import org.thoughtcrime.securesms.mms.AttachmentManager;
 import org.thoughtcrime.securesms.mms.AttachmentTypeSelectorAdapter;
 import org.thoughtcrime.securesms.mms.MediaTooLargeException;
+import org.thoughtcrime.securesms.mms.MmsSendHelper;
 import org.thoughtcrime.securesms.mms.Slide;
 import org.thoughtcrime.securesms.mms.SlideDeck;
 import org.thoughtcrime.securesms.notifications.MessageNotifier;
@@ -120,6 +121,7 @@ public class ConversationActivity extends PassphraseRequiredSherlockFragmentActi
   private Recipients recipients;
   private long threadId;
   private boolean isEncryptedConversation;
+  private boolean isMmsEnabled = true;
 
   private CharacterCalculator characterCalculator = new CharacterCalculator();
 
@@ -137,9 +139,11 @@ public class ConversationActivity extends PassphraseRequiredSherlockFragmentActi
   }
 
   @Override
-  protected void onPause() {
-    super.onPause();
-    MessageNotifier.setVisibleThread(-1L);
+  protected void onStart() {
+    super.onStart();
+
+    if (!isExistingConversation())
+      initializeRecipientsInput();
   }
 
   @Override
@@ -147,6 +151,7 @@ public class ConversationActivity extends PassphraseRequiredSherlockFragmentActi
     super.onResume();
     initializeSecurity();
     initializeTitleBar();
+    initializeMmsEnabledCheck();
     calculateCharactersRemaining();
 
     MessageNotifier.setVisibleThread(threadId);
@@ -154,11 +159,9 @@ public class ConversationActivity extends PassphraseRequiredSherlockFragmentActi
   }
 
   @Override
-  protected void onStart() {
-    super.onStart();
-
-    if (!isExistingConversation())
-      initializeRecipientsInput();
+  protected void onPause() {
+    super.onPause();
+    MessageNotifier.setVisibleThread(-1L);
   }
 
   @Override
@@ -369,11 +372,15 @@ public class ConversationActivity extends PassphraseRequiredSherlockFragmentActi
   }
 
   private void handleAddAttachment() {
+    if (this.isMmsEnabled) {
       AlertDialog.Builder builder = new AlertDialog.Builder(this);
       builder.setIcon(R.drawable.ic_dialog_attach);
       builder.setTitle(R.string.ConversationActivity_add_attachment);
       builder.setAdapter(attachmentAdapter, new AttachmentTypeListener());
       builder.show();
+    } else {
+      startActivity(new Intent(this, PromptApnActivity.class));
+    }
   }
 
   ///// Initializers
@@ -472,6 +479,20 @@ public class ConversationActivity extends PassphraseRequiredSherlockFragmentActi
     calculateCharactersRemaining();
   }
 
+  private void initializeMmsEnabledCheck() {
+    new AsyncTask<Void, Void, Boolean>() {
+      @Override
+      protected Boolean doInBackground(Void... params) {
+        return MmsSendHelper.hasNecessaryApnDetails(ConversationActivity.this);
+      }
+
+      @Override
+      protected void onPostExecute(Boolean isMmsEnabled) {
+        ConversationActivity.this.isMmsEnabled = isMmsEnabled;
+      }
+    }.execute();
+  }
+
   private void initializeResources() {
     recipientsPanel     = (RecipientsPanel)findViewById(R.id.recipients);
     recipients          = getIntent().getParcelableExtra("recipients");

src/org/thoughtcrime/securesms/PromptApnActivity.java

@@ -0,0 +1,86 @@
+package org.thoughtcrime.securesms;
+
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.preference.PreferenceManager;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+
+import org.thoughtcrime.securesms.util.Util;
+
+public class PromptApnActivity extends PassphraseRequiredSherlockActivity {
+
+  private EditText mmsc;
+  private EditText proxyHost;
+  private EditText proxyPort;
+
+  private Button okButton;
+  private Button cancelButton;
+
+  @Override
+  public void onCreate(Bundle bundle) {
+    super.onCreate(bundle);
+    setContentView(R.layout.prompt_apn_activity);
+
+    initializeResources();
+    initializeValues();
+  }
+
+  private void initializeValues() {
+    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
+    mmsc.setText(preferences.getString(ApplicationPreferencesActivity.MMSC_HOST_PREF, ""));
+    proxyHost.setText(preferences.getString(ApplicationPreferencesActivity.MMSC_PROXY_HOST_PREF, ""));
+    proxyPort.setText(preferences.getString(ApplicationPreferencesActivity.MMSC_PROXY_PORT_PREF, ""));
+  }
+
+  private void initializeResources() {
+    this.mmsc         = (EditText)findViewById(R.id.mmsc_url);
+    this.proxyHost    = (EditText)findViewById(R.id.mms_proxy_host);
+    this.proxyPort    = (EditText)findViewById(R.id.mms_proxy_port);
+    this.okButton     = (Button)findViewById(R.id.ok_button);
+    this.cancelButton = (Button)findViewById(R.id.cancel_button);
+
+    this.okButton.setOnClickListener(new View.OnClickListener() {
+      @Override
+      public void onClick(View v) {
+        handleSettings();
+      }
+    });
+
+    this.cancelButton.setOnClickListener(new View.OnClickListener() {
+      @Override
+      public void onClick(View v) {
+        finish();
+      }
+    });
+  }
+
+  private void handleSettings() {
+    if (Util.isEmpty(mmsc)) {
+      Toast.makeText(this, R.string.PromptApnActivity_you_must_specify_an_mmsc_url_for_your_carrier, Toast.LENGTH_LONG).show();
+      return;
+    }
+
+    PreferenceManager.getDefaultSharedPreferences(this).edit()
+      .putBoolean(ApplicationPreferencesActivity.USE_LOCAL_MMS_APNS_PREF, true)
+      .putString(ApplicationPreferencesActivity.MMSC_HOST_PREF, mmsc.getText().toString().trim())
+      .putString(ApplicationPreferencesActivity.MMSC_PROXY_HOST_PREF, proxyHost.getText().toString().trim())
+      .putString(ApplicationPreferencesActivity.MMSC_PROXY_PORT_PREF, proxyPort.getText().toString().trim())
+      .commit();
+
+    AlertDialog.Builder builder = new AlertDialog.Builder(this);
+    builder.setTitle(R.string.PromptApnActivity_mms_settings_updated);
+    builder.setMessage(R.string.PromptApnActivity_you_can_modify_these_values_from_the_textsecure_settings_menu_at_any_time_);
+    builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+      @Override
+      public void onClick(DialogInterface dialog, int which) {
+        finish();
+      }
+    });
+    builder.show();
+  }
+}

src/org/thoughtcrime/securesms/mms/MmsCommunication.java

@@ -36,6 +36,7 @@ import org.thoughtcrime.securesms.ApplicationPreferencesActivity;
 import org.thoughtcrime.securesms.database.DatabaseFactory;
 import org.thoughtcrime.securesms.service.MmsDownloader;
 import org.thoughtcrime.securesms.util.Conversions;
+import org.thoughtcrime.securesms.util.Util;
 
 import java.io.DataInputStream;
 import java.io.IOException;
@@ -85,7 +86,7 @@ public class MmsCommunication {
           port  = cursor.getString(cursor.getColumnIndexOrThrow("mmsport"));
         }
 
-        if (mmsc != null && !mmsc.equals(""))
+        if (!Util.isEmpty(mmsc))
           return new MmsConnectionParameters(mmsc, proxy, port);
 
       } while (cursor.moveToNext());

src/org/thoughtcrime/securesms/mms/MmsSendHelper.java

@@ -17,6 +17,7 @@
 package org.thoughtcrime.securesms.mms;
 
 import android.content.Context;
+import android.net.ConnectivityManager;
 import android.net.http.AndroidHttpClient;
 import android.util.Log;
 
@@ -26,6 +27,7 @@ import org.apache.http.StatusLine;
 import org.apache.http.client.ClientProtocolException;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.entity.ByteArrayEntity;
+import org.thoughtcrime.securesms.service.MmscProcessor;
 
 import ws.com.google.android.mms.pdu.PduParser;
 import ws.com.google.android.mms.pdu.SendConf;
@@ -84,4 +86,17 @@ public class MmsSendHelper extends MmsCommunication {
       throw new IOException("Failed to get MMSC information...");
     }
   }
+
+  public static boolean hasNecessaryApnDetails(Context context) {
+    try {
+      ConnectivityManager connectivityManager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
+      String apn = connectivityManager.getNetworkInfo(MmscProcessor.TYPE_MOBILE_MMS).getExtraInfo();
+
+      MmsCommunication.getMmsConnectionParameters(context, apn, true);
+      return true;
+    } catch (ApnUnavailableException e) {
+      Log.w("MmsSendHelper", e);
+      return false;
+    }
+  }
 }