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authorDaniel Gultsch <daniel.gultsch@rwth-aachen.de>2014-01-24 23:58:51 +0100
committerDaniel Gultsch <daniel.gultsch@rwth-aachen.de>2014-01-24 23:58:51 +0100
commitdf9dcb1060d44a719e2892446b62cde884a880cf (patch)
treeed3bf01c8f249162018b33460f81b52ac2f618fb /src/de/gultsch/chat/persistance
parentb273390e26e1d28f6df01fb421d8554cb7588a58 (diff)
basic persistance layer. refactor some parts of the conversation activity
Diffstat (limited to 'src/de/gultsch/chat/persistance')
-rw-r--r--src/de/gultsch/chat/persistance/DatabaseBackend.java68
1 files changed, 68 insertions, 0 deletions
diff --git a/src/de/gultsch/chat/persistance/DatabaseBackend.java b/src/de/gultsch/chat/persistance/DatabaseBackend.java
new file mode 100644
index 00000000..5ce7f7e0
--- /dev/null
+++ b/src/de/gultsch/chat/persistance/DatabaseBackend.java
@@ -0,0 +1,68 @@
+package de.gultsch.chat.persistance;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import de.gultsch.chat.entities.Conversation;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.util.Log;
+
+public class DatabaseBackend extends SQLiteOpenHelper {
+
+ private static DatabaseBackend instance = null;
+
+ private static final String DATABASE_NAME = "history";
+ private static final int DATABASE_VERSION = 1;
+
+ public DatabaseBackend(Context context) {
+ super(context, DATABASE_NAME, null, DATABASE_VERSION);
+ }
+
+ @Override
+ public void onCreate(SQLiteDatabase db) {
+ db.execSQL("create table conversations (uuid TEXT, name TEXT, profilePhotoUri TEXT, accountUuid TEXT, contactJid TEXT)");
+ }
+
+ @Override
+ public void onUpgrade(SQLiteDatabase db, int arg1, int arg2) {
+ // TODO Auto-generated method stub
+
+ }
+
+ public static synchronized DatabaseBackend getInstance(Context context) {
+ if (instance == null) {
+ instance = new DatabaseBackend(context.getApplicationContext());
+ }
+ return instance;
+ }
+
+ public void addConversation(Conversation conversation) {
+ SQLiteDatabase db = this.getWritableDatabase();
+ db.insert("conversations", null, conversation.getContentValues());
+ }
+
+
+ public int getConversationCount() {
+ SQLiteDatabase db = this.getReadableDatabase();
+ Cursor cursor = db.rawQuery("select count(uuid) as count from conversations",null);
+ cursor.moveToFirst();
+ return cursor.getInt(0);
+ }
+
+ public List<Conversation> getConversations(int status) {
+ List<Conversation> list = new ArrayList<Conversation>();
+ SQLiteDatabase db = this.getReadableDatabase();
+ String[] selectionArgs = {""+status};
+ Cursor cursor = db.rawQuery("select * from conversations where status = ?", selectionArgs);
+ Log.d("gultsch","getConversations has found "+cursor.getCount()+" rows");
+ while(cursor.moveToNext()) {
+ Log.d("gultsch","converting row #"+cursor.getPosition());
+ list.add(Conversation.fromCursor(cursor));
+ }
+ return list;
+ }
+
+}