यह नीचे दिए गए कोड का पालन बहुत ही सरल है ... बनायें 3 वर्ग उदाहरण के लिए नामित किया गया - 1. मैं इस्तेमाल किया स्थिरांक इंटरफ़ेस, पूर्ण कोड देखें और यह
package com.mypackage.quaddeals;
import android.net.Uri;
import android.provider.BaseColumns;
public interface Constants extends BaseColumns {
public static final String TABLE_NAME = "user_deal";
public static final String AUTHORITY = "com.mypackage.quaddeals";
public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY
+ "/" + TABLE_NAME);
public static final String TITLE = "title";
public static final String CITYID = "cityid";
}
2.BruPress डेटा वर्ग का उपयोग करें खोजने के ...
package com.mypackage.quaddeals;
import static android.provider.BaseColumns._ID;
import static com.mypackage.quaddeals.Constants.CITYID;
import static com.mypackage.quaddeals.Constants.TITLE;
import static com.mypackage.quaddeals.Constants.TABLE_NAME;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class Bru_Press_Data extends SQLiteOpenHelper {
public static final String DATABASE_NAME = "QuadDeals.db";
public static final int DATABASE_VERSION = 1;
/** Create a helper object for the Events database */
public Bru_Press_Data(Context ctx) {
super(ctx, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
try {
db.execSQL("CREATE TABLE " + TABLE_NAME + " (" + _ID
+ " INTEGER PRIMARY KEY AUTOINCREMENT," + TITLE
+ " TEXT UNIQUE," + CITYID + " TEXT);");
} catch (Exception e) {
Log.v("Bru_Press_Data", "exception in table created");
}
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
}
}
3.Provider वर्ग
package com.mypackage.quaddeals;
import static android.provider.BaseColumns._ID;
import static com.mypackage.quaddeals.Constants.CONTENT_URI;
import static com.mypackage.quaddeals.Constants.AUTHORITY;
import static com.mypackage.quaddeals.Constants.TABLE_NAME;
import android.app.SearchManager;
import android.content.ContentProvider;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.UriMatcher;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.Uri;
import android.text.TextUtils;
import android.util.Log;
public class Bru_Press_Provider extends ContentProvider {
private static final int QUADUSER = 1;
private static final int QUADUSER_ID = 2;
/** The MIME type of a directory of events */
private static final String CONTENT_TYPE = "vnd.android.cursor.dir/vnd.example.brown";
/** The MIME type of a single event */
private static final String CONTENT_ITEM_TYPE = "vnd.android.cursor.item/vnd.example.brown";
private static final String CONTENT_TYPE1 = "vnd.android.cursor.dir/vnd.example.brown";
/** The MIME type of a single event */
private static final String CONTENT_ITEM_TYPE1 = "vnd.android.cursor.item/vnd.example.brown";
// private static final String CONTENT_TYPE2 = "vnd.android.cursor.dir/vnd.example.brown";
/** The MIME type of a single event */
// private static final String CONTENT_ITEM_TYPE2 = "vnd.android.cursor.item/vnd.example.brown";
private Bru_Press_Data news;
private UriMatcher uriMatcher;
private Cursor cursor;
private SQLiteDatabase db;
String[] str;
@Override
public boolean onCreate() {
uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
uriMatcher.addURI(AUTHORITY, "user_deal", QUADUSER);
uriMatcher.addURI(AUTHORITY, "user_deal/#", QUADUSER_ID);
news = new Bru_Press_Data(getContext());
return true;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String orderBy) {
SQLiteDatabase db;
Cursor cursor = null;
if (uriMatcher.match(uri) == QUADUSER_ID) {
long id = Long.parseLong(uri.getPathSegments().get(1));
selection = appendRowId(selection, id);
}
if (uriMatcher.match(uri) == QUADUSER) {
// Get the database and run the query
db = news.getReadableDatabase();
cursor = db.query(TABLE_NAME, projection, selection, selectionArgs,
null, null, orderBy);
}
cursor.setNotificationUri(getContext().getContentResolver(), uri);
return cursor;
}
@Override
public String getType(Uri uri) {
switch (uriMatcher.match(uri)) {
case QUADUSER:
return CONTENT_TYPE;
case QUADUSER_ID:
return CONTENT_ITEM_TYPE;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
}
@Override
public Uri insert(Uri uri, ContentValues values) {
SQLiteDatabase db = news.getWritableDatabase();
Uri newUri = null;
long id = -1;
// Validate the requested uri
if (uriMatcher.match(uri) == QUADUSER) {
try {
id = db.insertOrThrow(TABLE_NAME, null, values);
// Notify any watchers of the change
newUri = ContentUris.withAppendedId(CONTENT_URI, id);
getContext().getContentResolver().notifyChange(newUri, null);
} catch (NullPointerException e) {
Log.v("Error","OnInsert"+e);
}
}
else if (uriMatcher.match(uri) != QUADUSER) {
throw new IllegalArgumentException("Unknown URI bru press " + uri);
}
return newUri;
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
SQLiteDatabase db = news.getWritableDatabase();
int count;
long id;
Log.v("Delete",selection);
switch (uriMatcher.match(uri)) {
case QUADUSER:
count = db.delete(TABLE_NAME, selection, selectionArgs);
break;
case QUADUSER_ID:
id = Long.parseLong(uri.getPathSegments().get(1));
count = db.delete(TABLE_NAME, appendRowId(selection, id),
selectionArgs);
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
getContext().getContentResolver().notifyChange(uri, null);
return count;
}
@Override
public int update(Uri uri, ContentValues values, String selection,
String[] selectionArgs) {
SQLiteDatabase db = news.getWritableDatabase();
int count;
long id;
switch (uriMatcher.match(uri)) {
case QUADUSER:
count = db.update(TABLE_NAME, values, selection, selectionArgs);
break;
case QUADUSER_ID:
id = Long.parseLong(uri.getPathSegments().get(1));
count = db.update(TABLE_NAME, values, appendRowId(selection, id),
selectionArgs);
break;
default:
throw new IllegalArgumentException("Unknown URI " + uri);
}
// Notify any watchers of the change
getContext().getContentResolver().notifyChange(uri, null);
return count;
}
/** Append an id test to a SQL selection expression */
private String appendRowId(String selection, long id) {
return _ID
+ "="
+ id
+ (!TextUtils.isEmpty(selection) ? " AND (" + selection + ')'
: "");
}
}
नोट: यह परिभाषित करने के लिए लगता है प्रकट में प्रदाता वर्ग की तरह फ़ाइल।
अन्य वर्ग है, जहां मैं डालने और डीबी के लिए डेटा पुनः प्राप्त कर सकते हैं ... है
class A extends Activity{
{
addevent(cityname,cityid); // to insert
}
private void addevent(String a1, String a2) {
try {
ContentValues values = new ContentValues();
values.put(Constants.TITLE, a1);
values.put(Constants.CITYID, a2);
getContentResolver().insert(Constants.CONTENT_URI, values);
} catch (Exception e) {
Log.v("Error",""+e);
}
}
Db
से पुनः प्राप्त करने के
Cursor c = getContentResolver().query(Constants.CONTENT_URI,
null, null, null,null);
int a = c.getCount();
Log.v("Count",""+a);
int columnIndex = c.getColumnIndex(Constants.TITLE);
int columnIndex2 = c.getColumnIndex(Constants.CITYID);
if (c.moveToNext()) {
cityName = c.getString(columnIndex);
city_id= c.getString(columnIndex2);
}
}
इस तरह की कुछ बात की कोशिश इस प्रकार है ... यह आपकी मदद करेगा
इसका संदर्भ लें [एंड्रॉइड में डेटाबेस बनाना और उपयोग करना] (http://www.devx.com/wireless/Article/40842/0), यह एक अच्छा एक –
है, इसे नीचे दिए गए ट्यूटोरियल को पढ़ें एसक्लाइट में डेटा एक्सेस करना http: //www.hig herpass.com/Android/Tutorials/Accessing-Data-With-Android-Cursors/ – Narasimha
+1, अधिक से अधिक 17k विचारों अभी भी कोई वोट अप! – Jaguar