Minor layout changes.

src/net/sf/briar/android/invitation/CodesDoNotMatchActivity.java

@@ -45,6 +45,8 @@ implements OnClickListener {
 		layout.addView(innerLayout);
 
 		TextView interfering = new TextView(this);
+		interfering.setGravity(CENTER_HORIZONTAL);
+		interfering.setPadding(0, 0, 0, 10);
 		interfering.setText(R.string.interfering);
 		layout.addView(interfering);
 

src/net/sf/briar/android/invitation/ConnectionFailedActivity.java

@@ -51,6 +51,7 @@ implements WifiStateListener, BluetoothStateListener, OnClickListener {
 		layout.addView(innerLayout);
 
 		TextView checkNetwork = new TextView(this);
+		checkNetwork.setGravity(CENTER_HORIZONTAL);
 		checkNetwork.setText(R.string.check_same_network);
 		layout.addView(checkNetwork);
 

src/net/sf/briar/android/invitation/ContactAddedActivity.java

@@ -49,6 +49,7 @@ OnEditorActionListener {
 		layout.addView(innerLayout);
 
 		TextView enterNickname = new TextView(this);
+		enterNickname.setGravity(CENTER_HORIZONTAL);
 		enterNickname.setText(R.string.enter_nickname);
 		layout.addView(enterNickname);
 

src/net/sf/briar/android/invitation/NetworkSetupActivity.java

@@ -33,6 +33,7 @@ implements WifiStateListener, BluetoothStateListener, OnClickListener {
 		layout.setGravity(CENTER_HORIZONTAL);
 
 		TextView sameNetwork = new TextView(this);
+		sameNetwork.setGravity(CENTER_HORIZONTAL);
 		sameNetwork.setText(R.string.same_network);
 		layout.addView(sameNetwork);
 

src/net/sf/briar/android/invitation/WaitForContactActivity.java

@@ -42,10 +42,12 @@ implements ConfirmationListener {
 		layout.addView(innerLayout);
 
 		TextView yourCode = new TextView(this);
+		yourCode.setGravity(CENTER_HORIZONTAL);
 		yourCode.setText(R.string.your_confirmation_code);
 		layout.addView(yourCode);
 
 		TextView code = new TextView(this);
+		code.setGravity(CENTER_HORIZONTAL);
 		code.setTextSize(50);
 		InvitationManager im = InvitationManagerFactory.getInvitationManager();
 		code.setText(im.getLocalConfirmationCode());