Posts

Login and Registration using SQLite

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This is a good example of login  and Sign up page using SQLite. In this project, we have 3 activities and 2  java classes.  Contact.java   DatabaseHelper.java  Display.java  MainActivity.java  SignUp.java activity_main.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:paddingBottom="@dimen/activity_vertical_margin"     android:paddingLeft="@dimen/activity_horizontal_margin"     android:paddingRight="@dimen/activity_horizontal_margin"     android:paddingTop="@dimen/activity_vertical_margin"     tools:context="com.blogspot.csdevbin.sqliteexample.MainActivity">     <EditText         android

Saving Data in Android

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Most Android apps need to save data, even if only to save information about the app state during onPause() so the user's progress is not lost. Most non-trivial apps also need to save user settings, and some apps must manage large amounts of information in files and databases. This class introduces you to the principal data storage options in Android, including: Saving key-value pairs of simple data types in a shared preferences file Saving arbitrary files in Android's file system Using databases managed by SQLite Source: blog                SharedPreferences Example

WebView with HTML in asset folder

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main.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:paddingBottom="@dimen/activity_vertical_margin"     android:paddingLeft="@dimen/activity_horizontal_margin"     android:paddingRight="@dimen/activity_horizontal_margin"     android:paddingTop="@dimen/activity_vertical_margin"     tools:context="com.blogspot.csdevbin.webview.MainActivity">     <Button         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Web View"         android:id="@+id/button"         android:layout_alignParentTop="true"         android:layout_centerHorizontal

WebView Example

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Add Internet Permission in  manifest file. <uses-permission android:name = "android.permission.INTERNET" /> activity_first.xml ?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:paddingBottom="@dimen/activity_vertical_margin"     android:paddingLeft="@dimen/activity_horizontal_margin"     android:paddingRight="@dimen/activity_horizontal_margin"     android:paddingTop="@dimen/activity_vertical_margin"     android:orientation="vertical"     tools:context="com.blogspot.csdevbin.accno.First">     <Button         android:layout_width="wrap_content"         android:layout_height="wrap_content"         and

OnSaveInstantState Method

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In android app when ever activities changes their orientation (portal/landscape) ,they are going to loss their UI state. To avoid this, we use OnSaveInstantState Method. activity_main.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:paddingBottom="@dimen/activity_vertical_margin"     android:paddingLeft="@dimen/activity_horizontal_margin"     android:paddingRight="@dimen/activity_horizontal_margin"     android:paddingTop="@dimen/activity_vertical_margin"     tools:context="com.blogspot.csdevbin.onsaveinstantstatemethod.MainActivity">     <EditText         android:layout_width="wrap_content"         android:layout_height="w