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.

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() {
-    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();
+    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;
+    }
+  }
 }