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MIT License
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package com.example.cloudaltas.library; //from w w w .j av a 2 s .c o m import java.util.HashMap; import android.content.*; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import java.util.*; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; public class DatabaseHandler extends SQLiteOpenHelper { // All Static variables // Database Version private static final int DATABASE_VERSION = 1; // Database Name private static final String DATABASE_NAME = "android_api"; // Login table name private static final String TABLE_LOGIN = "login"; // Login Table Columns names private static final String KEY_ID = "id"; private static final String KEY_NAME = "name"; private static final String KEY_EMAIL = "email"; private static final String KEY_UID = "uid"; private static final String KEY_CREATED_AT = "created_at"; public DatabaseHandler(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } // Creating Tables @Override public void onCreate(SQLiteDatabase db) { String CREATE_LOGIN_TABLE = "CREATE TABLE " + TABLE_LOGIN + "(" + KEY_ID + " INTEGER PRIMARY KEY," + KEY_NAME + " TEXT," + KEY_EMAIL + " TEXT UNIQUE," + KEY_UID + " TEXT," + KEY_CREATED_AT + " TEXT" + ")"; db.execSQL(CREATE_LOGIN_TABLE); } // Upgrading database @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { // Drop older table if existed db.execSQL("DROP TABLE IF EXISTS " + TABLE_LOGIN); // Create tables again onCreate(db); } /** * Storing user details in database * */ public void addUser(String name, String email, String uid, String created_at) { SQLiteDatabase db = this.getWritableDatabase(); ContentValues values = new ContentValues(); values.put(KEY_NAME, name); // Name values.put(KEY_EMAIL, email); // Email values.put(KEY_UID, uid); // Email values.put(KEY_CREATED_AT, created_at); // Created At // Inserting Row db.insert(TABLE_LOGIN, null, values); db.close(); // Closing database connection } /** * Getting user data from database * */ public HashMap<String, String> getUserDetails(){ HashMap<String,String> user = new HashMap<String,String>(); String selectQuery = "SELECT * FROM " + TABLE_LOGIN; SQLiteDatabase db = this.getReadableDatabase(); Cursor cursor = db.rawQuery(selectQuery, null); // Move to first row cursor.moveToFirst(); if(cursor.getCount() > 0){ user.put("name", cursor.getString(1)); user.put("email", cursor.getString(2)); user.put("uid", cursor.getString(3)); user.put("created_at", cursor.getString(4)); } cursor.close(); db.close(); // return user return user; } /** * Getting user login status * return true if rows are there in table * */ public int getRowCount() { String countQuery = "SELECT * FROM " + TABLE_LOGIN; SQLiteDatabase db = this.getReadableDatabase(); Cursor cursor = db.rawQuery(countQuery, null); int rowCount = cursor.getCount(); db.close(); cursor.close(); // return row count return rowCount; } /** * Re crate database * Delete all tables and create them again * */ public void resetTables(){ SQLiteDatabase db = this.getWritableDatabase(); // Delete All Rows db.delete(TABLE_LOGIN, null, null); db.close(); } }