Shared Preference

First Class:





import android.os.Bundle;
import android.widget.Toast;


public class SharedActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Preference p=new Preference(this);
        p. Saved pref("KUMAR MLA COIMBATORE");
        Toast.makeText(this, p.Getprif(), Toast.LENGTH_LONG).show();
    }
}




Second Class:



import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;


public class Preference {
private final static String PREF_FILE="pref";
SharedPreferences preference;
public Preference(Context context){
preference=context.getSharedPreferences(PREF_FILE, Context.MODE_PRIVATE);
}
public void Savedpref(String str){
Editor et=preference.edit();
et.putString("username",str);
et.commit();
}
public String Getprif(){
return preference.getString("username","Not Exit");
}


}

BlackBerry

http://amrishodiq.durianberry.com/
http://devsushi.com/2007/12/02/blackberry-jde-api-user-interface-field-reference/
http://blackberry-tips-bikas.blogspot.com/2009_08_01_archive.html

LinearLayout

•LinearLayout organizes elements along a single line. You specify whether that line is verticle or horizontal using android:orientation. Here is a sample Layout XML using LinearLayout.

Ex:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

  android:orientation="horizontal"

  android:layout_width="fill_parent"

    android:layout_height="fill_parent">

     <Button

      android:id="@+id/backbutton"

      android:text="Back"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content" />

    <TextView

      android:text="First Name"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content" />

    <EditText

      android:width="100px"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content" />

<TextView

      android:text="Last Name"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content" />

    <EditText

      android:width="100px"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content" />

</LinearLayout>

ANDROID LAYOUTS

An Android layout is a class that handles arranging the way its children appear on the screen.  Anything that is a View (or inherits from View) can be a child of a layout. All of the layouts inherit from ViewGroup (which inherits from View) so you can nest layouts.  You could also create your own custom layout by making a class that inherits from ViewGroup.

The standard Layouts are:

                         AbsoluteLayout

                         FrameLayout

                         LinearLayout

                         RelativeLayout

                         TableLayout

AbsoluteLayout

 AbsoluteLayout is based on the simple idea of placing each control at an absolute position.  You specify the exact x and y coordinates on the screen for each control.  This is not recommended for most UI development (in fact AbsoluteLayout is currently deprecated) since absolutely positioning every element on the screen makes an inflexible UI that is much more difficult to maintain.  Consider what happens if a control needs to be added to the UI. You would have to change the position of every single element that is shifted by the new control

Exaple:

<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent">

    <Button

      android:id="@+id/backbutton"

      android:text="Back"

      android:layout_x="10px"

      android:layout_y="5px"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content" />

    <TextView

      android:layout_x="10px"

      android:layout_y="110px"

      android:text="First Name"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content" />

    <EditText

      android:layout_x="150px"

      android:layout_y="100px"

      android:width="100px"

      android:layout_width="wrap_content"

      android:layout_height="wrap_content" />

   

</AbsoluteLayout>

FrameLayout:

•FrameLayout is designed to display a single item at a time. You can have multiple elements within a FrameLayout but each element will be positioned based on the top left of the screen. Elements that overlap will be displayed overlapping. I have created a simple XML layout using FrameLayout that shows how this works.

ex:

<FrameLayout

  android:layout_width="fill_parent"

  android:layout_height="fill_parent"

  xmlns:android="http://schemas.android.com/apk/res/android">

  <ImageView

  android:src="@drawable/icon"

  android:scaleType="fitCenter"

  android:layout_height="fill_parent"

  android:layout_width="fill_parent"/>

  <TextView

  android:text="Learn-Android.com"

  android:textSize="24sp"

  android:textColor="#000000"

  android:layout_height="fill_parent"

  android:layout_width="fill_parent"

  android:gravity="center"/>

</FrameLayout>

ANDROID INTRODUCTION

Android fundamental and System Requirement.
Software Installation
How to Create Android  Project :CLICK HERE

Android Listview Onclick

Listview OnClick Example -

Your Java code should look like

[sourcecode language="java"]

public class ListviewOnclickExample extends Activity
{
private ListView lv1;
private String lv_arr[]={"Android","iPhone","BlackBerry","AndroidPeople","J2ME", "Listview","ArrayAdapter","ListItem","Us","UK","India"};
@Override
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.main);
lv1=(ListView)findViewById(R.id.ListView01);
lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , lv_arr));
lv1.setTextFilterEnabled(true);
lv1.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
AlertDialog.Builder adb=new AlertDialog.Builder(ListviewOnclickExample.this);
adb.setTitle("LVSelectedItemExample");
adb.setMessage("Selected Item is = "+lv1.getItemAtPosition(position));
adb.setPositiveButton("Ok", null);
adb.show();
}
});
}
}

The output will look like

Android Listview

Today, we are going to see about a simple listview example. In Android, Listview is used to show a list of items in a vertically scrolling list.  Learn a listview of android array in this tutorial.

For instance, in a Registration form when we are selecting professions a list of items will be displayed. We can use Listview to display the list of items.

Your XML file should look like

[sourcecode language="xml"]

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/LinearLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<ListView android:id="@+id/ListView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>

[/sourcecode]

Your Java code looks like

[sourcecode language="java"]

public class ListviewExample extends Activity
{
private ListView lv1;
private String lv_arr[]={"Android","iPhone","BlackBerry","AndroidPeople"};
@Override
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.main);
lv1=(ListView)findViewById(R.id.ListView01);
// By using setAdpater method in listview we an add string array in list.
lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , lv_arr));
}
}

The output will look like