Mega Code Archive
Use SQLiteDatabase
<![CDATA[
package app.Test;
import android.app.Activity;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.Bundle;
import android.widget.TextView;
public class appTest extends Activity {
private static String[] FROM = { "ID", "TIME", "TITLE", };
private static String ORDER_BY = "TIME DESC";
private EventsData events;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
events = new EventsData(this);
try {
addEvent("Hello, Android!");
Cursor cursor = getEvents();
showEvents(cursor);
} finally {
events.close();
}
}
private void addEvent(String string) {
SQLiteDatabase db = events.getWritableDatabase();
ContentValues values = new ContentValues();
values.put("titme", System.currentTimeMillis());
values.put("title", string);
db.insertOrThrow("event", null, values);
}
private Cursor getEvents() {
SQLiteDatabase db = events.getReadableDatabase();
Cursor cursor = db.query("event", FROM, null, null, null, null,ORDER_BY);
startManagingCursor(cursor);
return cursor;
}
private void showEvents(Cursor cursor) {
StringBuilder builder = new StringBuilder("Saved events:\n");
while (cursor.moveToNext()) {
long id = cursor.getLong(0);
long time = cursor.getLong(1);
String title = cursor.getString(2);
builder.append(id).append(": ");
builder.append(time).append(": ");
builder.append(title).append("\n");
}
// Display on the screen
TextView text = (TextView) findViewById(R.id.empty);
text.setText(builder);
}
}
class EventsData extends SQLiteOpenHelper {
private static final String DATABASE_NAME = "events.db";
private static final int DATABASE_VERSION = 1;
/** Create a helper object for the Events database */
public EventsData(Context ctx) {
super(ctx, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("CREATE TABLE event (id INTEGER PRIMARY KEY AUTOINCREMENT, time INTEGER,title TEXT NOT NULL);");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS event");
onCreate(db);
}
}
//main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<!-- Note built-in ids for 'list' and 'empty' -->
<ListView
android:id="@+id/list"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:id="@+id/empty"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/empty" />
</LinearLayout>
//strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="app_name">Events</string>
<string name="empty">No events!</string>
</resources>
]]>