Touching startup failure notification now shows details

The text of the startup failure notification is unhelpful due to lack of
space. Touching the notification now launches an activity that gives details
of the problem and what can be done about it.

Closes #38

briar-android/src/org/briarproject/android/StartupFailureActivity.java

@@ -0,0 +1,44 @@
+package org.briarproject.android;
+
+import android.app.NotificationManager;
+import android.content.Intent;
+import android.os.Bundle;
+import android.widget.TextView;
+
+import org.briarproject.R;
+
+import roboguice.activity.RoboActivity;
+
+import static org.briarproject.api.lifecycle.LifecycleManager.StartResult;
+
+public class StartupFailureActivity extends RoboActivity {
+
+	@Override
+	public void onCreate(Bundle state) {
+		super.onCreate(state);
+
+		setContentView(R.layout.activity_startup_failure);
+		handleIntent(getIntent());
+	}
+
+	private void handleIntent(Intent i) {
+		StartResult result = (StartResult) i.getSerializableExtra("briar.START_RESULT");
+		int notificationId = i.getIntExtra("briar.FAILURE_NOTIFICATION_ID", -1);
+
+		// cancel notification
+		if (notificationId > -1) {
+			Object o = getSystemService(NOTIFICATION_SERVICE);
+			NotificationManager nm = (NotificationManager) o;
+			nm.cancel(notificationId);
+		}
+
+		// show proper error message
+		TextView view = (TextView) findViewById(R.id.errorView);
+		if (result.equals(StartResult.DB_ERROR)) {
+			view.setText(getText(R.string.startup_failed_db_error));
+		} else if (result.equals(StartResult.SERVICE_ERROR)) {
+			view.setText(getText(R.string.startup_failed_service_error));
+		}
+	}
+
+}